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Abstract
Sunscreen application to UV-exposed skin is promoted to prevent skin cancer and sun damage, within a comprehensive photoprotection strategy that also includes sun avoidance and wearing UV protective clothing. The benefits of sunscreen are verified in preventing sunburn but appear to be largely presumptive in skin cancer prevention. Contemporary science establishes UVA as a primary driver of melanoma and photoaging. Consequentially, the traditional UVB-skewed protection of sunscreens provides an intellectual and logical explanation for rising skin cancer rates and, in particular, their failure to protect against melanoma. Better protection could be achieved with more balanced UVB/UVA sunscreens, toward spectral homeostasis protection. Greater balanced protection has another advantage of attenuating fewer UVB rays, which aid synthesis of vitamin D and nitric oxide. Percutaneous absorption of Soluble Organic UV Filters leads to systemic exposure, which becomes the relevant safety consideration. It is minimized by selecting Insoluble UV Filters with low absorption potential from a molecular weight above 500 Da. The filters must also be very hydrophilic, very lipophilic, or consist of particles. The risk-benefit ratio is a medical imperative, more so for cosmetics or sunscreens, since in principle there should be no risk from their use. The production of ideal sunscreens that mimic the effective, balanced UVB/UVA attenuation of textiles and shade is now possible, while maintaining an acceptable therapeutic margin of safety in humans and a favorable ecologic profile. Sunscreens with a favorable risk-benefit ratio and good esthetic properties or other consumer-friendly attributes will improve compliance and may achieve substantial clinical benefits.
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Affiliation(s)
| | - Sharyn A Laughlin
- Division of Dermatology, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
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2
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Li X, Liao M, Huang J, Xu Z, Lin Z, Ye N, Zhang Z, Peng X. Glycolate oxidase-dependent H 2O 2 production regulates IAA biosynthesis in rice. BMC Plant Biol 2021; 21:326. [PMID: 34229625 PMCID: PMC8261990 DOI: 10.1186/s12870-021-03112-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 06/28/2021] [Indexed: 05/26/2023]
Abstract
BACKGROUND Glycolate oxidase (GLO) is not only a key enzyme in photorespiration but also a major engine for H2O2 production in plants. Catalase (CAT)-dependent H2O2 decomposition has been previously reported to be involved in the regulation of IAA biosynthesis. However, it is still not known which mechanism contributed to the H2O2 production in IAA regulation. RESULTS In this study, we found that in glo mutants of rice, as H2O2 levels decreased IAA contents significantly increased, whereas high CO2 abolished the difference in H2O2 and IAA contents between glo mutants and WT. Further analyses showed that tryptophan (Trp, the precursor for IAA biosynthesis in the Trp-dependent biosynthetic pathway) also accumulated due to increased tryptophan synthetase β (TSB) activity. Moreover, expression of the genes involved in Trp-dependent IAA biosynthesis and IBA to IAA conversion were correspondingly up-regulated, further implicating that both pathways contribute to IAA biosynthesis as mediated by the GLO-dependent production of H2O2. CONCLUSION We investigated the function of GLO in IAA signaling in different levels from transcription, enzyme activities to metabolic levels. The results suggest that GLO-dependent H2O2 signaling, essentially via photorespiration, confers regulation over IAA biosynthesis in rice plants.
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Affiliation(s)
- Xiangyang Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Life Sciences, South China Agricultural University, No.483, Wushan Road, 510642, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agricultural Science and Technology, South China Agricultural University, No.483, Wushan Road, Guangzhou, 510642, China
| | - Mengmeng Liao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Life Sciences, South China Agricultural University, No.483, Wushan Road, 510642, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agricultural Science and Technology, South China Agricultural University, No.483, Wushan Road, Guangzhou, 510642, China
| | - Jiayu Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Life Sciences, South China Agricultural University, No.483, Wushan Road, 510642, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agricultural Science and Technology, South China Agricultural University, No.483, Wushan Road, Guangzhou, 510642, China
| | - Zheng Xu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Life Sciences, South China Agricultural University, No.483, Wushan Road, 510642, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agricultural Science and Technology, South China Agricultural University, No.483, Wushan Road, Guangzhou, 510642, China
| | - Zhanqiao Lin
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Life Sciences, South China Agricultural University, No.483, Wushan Road, 510642, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agricultural Science and Technology, South China Agricultural University, No.483, Wushan Road, Guangzhou, 510642, China
| | - Nenghui Ye
- College of Agronomy, Hunan Agricultural University, No.1, Nongda Road, Changsha, 410128, China
| | - Zhisheng Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Life Sciences, South China Agricultural University, No.483, Wushan Road, 510642, Guangzhou, China.
- Guangdong Laboratory for Lingnan Modern Agricultural Science and Technology, South China Agricultural University, No.483, Wushan Road, Guangzhou, 510642, China.
| | - Xinxiang Peng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Life Sciences, South China Agricultural University, No.483, Wushan Road, 510642, Guangzhou, China
- Guangdong Laboratory for Lingnan Modern Agricultural Science and Technology, South China Agricultural University, No.483, Wushan Road, Guangzhou, 510642, China
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3
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Jiang J, Xiao Y, Chen H, Hu W, Zeng L, Ke H, Ditengou FA, Devisetty U, Palme K, Maloof J, Dehesh K. Retrograde Induction of phyB Orchestrates Ethylene-Auxin Hierarchy to Regulate Growth. Plant Physiol 2020; 183:1268-1280. [PMID: 32430463 PMCID: PMC7333703 DOI: 10.1104/pp.20.00090] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 05/11/2020] [Indexed: 05/19/2023]
Abstract
Exquisitely regulated plastid-to-nucleus communication by retrograde signaling pathways is essential for fine-tuning of responses to the prevailing environmental conditions. The plastidial retrograde signaling metabolite methylerythritol cyclodiphosphate (MEcPP) has emerged as a stress signal transduced into a diverse ensemble of response outputs. Here, we demonstrate enhanced phytochrome B protein abundance in red light-grown MEcPP-accumulating ceh1 mutant Arabidopsis (Arabidopsis thaliana) plants relative to wild-type seedlings. We further establish MEcPP-mediated coordination of phytochrome B with auxin and ethylene signaling pathways and uncover differential hypocotyl growth of red light-grown seedlings in response to these phytohormones. Genetic and pharmacological interference with ethylene and auxin pathways outlines the hierarchy of responses, placing ethylene epistatic to the auxin signaling pathway. Collectively, our findings establish a key role of a plastidial retrograde metabolite in orchestrating the transduction of a repertoire of signaling cascades. This work positions plastids at the zenith of relaying information coordinating external signals and internal regulatory circuitry to secure organismal integrity.
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Affiliation(s)
- Jishan Jiang
- Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, California 92521
| | - Yanmei Xiao
- Department of Molecular and Cellular Biology, University of California, Davis, California 95616
- University of Freiburg, Faculty of Biology, BIOSS Centre for Biological Signaling Studies and ZBSA Centre for Biosystems Studies, 79104 Freiburg, Germany
| | - Hao Chen
- Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, California 92521
| | - Wei Hu
- Department of Molecular and Cellular Biology, University of California, Davis, California 95616
| | - Liping Zeng
- Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, California 92521
| | - Haiyan Ke
- Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, California 92521
| | - Franck A Ditengou
- Department of Plant Biology, University of California, Davis, California 95616
| | - Upendra Devisetty
- University of Freiburg, Faculty of Biology, BIOSS Centre for Biological Signaling Studies and ZBSA Centre for Biosystems Studies, 79104 Freiburg, Germany
| | - Klaus Palme
- Department of Plant Biology, University of California, Davis, California 95616
| | - Julin Maloof
- University of Freiburg, Faculty of Biology, BIOSS Centre for Biological Signaling Studies and ZBSA Centre for Biosystems Studies, 79104 Freiburg, Germany
| | - Katayoon Dehesh
- Department of Botany and Plant Sciences, Institute of Integrative Genome Biology, University of California, Riverside, California 92521
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Cecchin M, Marcolungo L, Rossato M, Girolomoni L, Cosentino E, Cuine S, Li‐Beisson Y, Delledonne M, Ballottari M. Chlorella vulgaris genome assembly and annotation reveals the molecular basis for metabolic acclimation to high light conditions. Plant J 2019; 100:1289-1305. [PMID: 31437318 PMCID: PMC6972661 DOI: 10.1111/tpj.14508] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 08/05/2019] [Accepted: 08/07/2019] [Indexed: 05/05/2023]
Abstract
Chlorella vulgaris is a fast-growing fresh-water microalga cultivated on the industrial scale for applications ranging from food to biofuel production. To advance our understanding of its biology and to establish genetics tools for biotechnological manipulation, we sequenced the nuclear and organelle genomes of Chlorella vulgaris 211/11P by combining next generation sequencing and optical mapping of isolated DNA molecules. This hybrid approach allowed us to assemble the nuclear genome in 14 pseudo-molecules with an N50 of 2.8 Mb and 98.9% of scaffolded genome. The integration of RNA-seq data obtained at two different irradiances of growth (high light, HL versus low light, LL) enabled us to identify 10 724 nuclear genes, coding for 11 082 transcripts. Moreover, 121 and 48 genes, respectively, were found in the chloroplast and mitochondrial genome. Functional annotation and expression analysis of nuclear, chloroplast and mitochondrial genome sequences revealed particular features of Chlorella vulgaris. Evidence of horizontal gene transfers from chloroplast to mitochondrial genome was observed. Furthermore, comparative transcriptomic analyses of LL versus HL provided insights into the molecular basis for metabolic rearrangement under HL versus LL conditions leading to enhanced de novo fatty acid biosynthesis and triacylglycerol accumulation. The occurrence of a cytosolic fatty acid biosynthetic pathway could be predicted and its upregulation upon HL exposure was observed, consistent with the increased lipid amount under HL conditions. These data provide a rich genetic resource for future genome editing studies, and potential targets for biotechnological manipulation of Chlorella vulgaris or other microalgae species to improve biomass and lipid productivity.
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Affiliation(s)
- Michela Cecchin
- Dipartimento di BiotecnologieUniversità di VeronaStrada Le Grazie 1537134Verona, Italy
| | - Luca Marcolungo
- Dipartimento di BiotecnologieUniversità di VeronaStrada Le Grazie 1537134Verona, Italy
| | - Marzia Rossato
- Dipartimento di BiotecnologieUniversità di VeronaStrada Le Grazie 1537134Verona, Italy
| | - Laura Girolomoni
- Dipartimento di BiotecnologieUniversità di VeronaStrada Le Grazie 1537134Verona, Italy
| | - Emanuela Cosentino
- Dipartimento di BiotecnologieUniversità di VeronaStrada Le Grazie 1537134Verona, Italy
| | - Stephan Cuine
- Institute of Biosciences and Biotechnologies of Aix‐Marseille, UMR7265Aix‐Marseille UniversityCEACNRSCEA CadaracheSaint‐Paul‐lez DuranceF‐13108France
| | - Yonghua Li‐Beisson
- Institute of Biosciences and Biotechnologies of Aix‐Marseille, UMR7265Aix‐Marseille UniversityCEACNRSCEA CadaracheSaint‐Paul‐lez DuranceF‐13108France
| | - Massimo Delledonne
- Dipartimento di BiotecnologieUniversità di VeronaStrada Le Grazie 1537134Verona, Italy
| | - Matteo Ballottari
- Dipartimento di BiotecnologieUniversità di VeronaStrada Le Grazie 1537134Verona, Italy
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Beaugelin I, Chevalier A, D'Alessandro S, Ksas B, Novák O, Strnad M, Forzani C, Hirt H, Havaux M, Monnet F. OXI1 and DAD Regulate Light-Induced Cell Death Antagonistically through Jasmonate and Salicylate Levels. Plant Physiol 2019; 180:1691-1708. [PMID: 31123095 PMCID: PMC6752932 DOI: 10.1104/pp.19.00353] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 05/07/2019] [Indexed: 05/09/2023]
Abstract
Singlet oxygen produced from triplet excited chlorophylls in photosynthesis is a signal molecule that can induce programmed cell death (PCD) through the action of the OXIDATIVE STRESS INDUCIBLE 1 (OXI1) kinase. Here, we identify two negative regulators of light-induced PCD that modulate OXI1 expression: DAD1 and DAD2, homologs of the human antiapoptotic protein DEFENDER AGAINST CELL DEATH. Overexpressing OXI1 in Arabidopsis (Arabidopsis thaliana) increased plant sensitivity to high light and induced early senescence of mature leaves. Both phenomena rely on a marked accumulation of jasmonate and salicylate. DAD1 or DAD2 overexpression decreased OXI1 expression, jasmonate levels, and sensitivity to photooxidative stress. Knock-out mutants of DAD1 or DAD2 exhibited the opposite responses. Exogenous applications of jasmonate upregulated salicylate biosynthesis genes and caused leaf damage in wild-type plants but not in the salicylate biosynthesis mutant Salicylic acid induction-deficient2, indicating that salicylate plays a crucial role in PCD downstream of jasmonate. Treating plants with salicylate upregulated the DAD genes and downregulated OXI1 We conclude that OXI1 and DAD are antagonistic regulators of cell death through modulating jasmonate and salicylate levels. High light-induced PCD thus results from a tight control of the relative activities of these regulating proteins, with DAD exerting a negative feedback control on OXI1 expression.
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Affiliation(s)
- Inès Beaugelin
- Aix-Marseille University, Centre National de la Recherche Scientifique, Commissariat à l'Energie Atomique et aux Energies Alternatives, UMR 7265 Biosciences and Biotechnologies Institute of Aix- Marseille, CEA/Cadarache, F-13108 Saint-Paul-lès-Durance, France
| | - Anne Chevalier
- Aix-Marseille University, Centre National de la Recherche Scientifique, Commissariat à l'Energie Atomique et aux Energies Alternatives, UMR 7265 Biosciences and Biotechnologies Institute of Aix- Marseille, CEA/Cadarache, F-13108 Saint-Paul-lès-Durance, France
| | - Stefano D'Alessandro
- Aix-Marseille University, Centre National de la Recherche Scientifique, Commissariat à l'Energie Atomique et aux Energies Alternatives, UMR 7265 Biosciences and Biotechnologies Institute of Aix- Marseille, CEA/Cadarache, F-13108 Saint-Paul-lès-Durance, France
| | - Brigitte Ksas
- Aix-Marseille University, Centre National de la Recherche Scientifique, Commissariat à l'Energie Atomique et aux Energies Alternatives, UMR 7265 Biosciences and Biotechnologies Institute of Aix- Marseille, CEA/Cadarache, F-13108 Saint-Paul-lès-Durance, France
| | - Ondřej Novák
- Laboratory of Growth Regulators, Institute of Experimental Botany, The Czech Academy of Sciences, Palacký University, CZ-78371 Olomouc, Czech Republic
| | - Miroslav Strnad
- Laboratory of Growth Regulators, Institute of Experimental Botany, The Czech Academy of Sciences, Palacký University, CZ-78371 Olomouc, Czech Republic
| | - Céline Forzani
- Institut Jean-Pierre Bourgin, Institut National de la Recherche Agronomique, AgroParisTech, Centre National de la Recherche Scientifique, Université Paris-Saclay, F-78000 Versailles, France
| | - Heribert Hirt
- Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Michel Havaux
- Aix-Marseille University, Centre National de la Recherche Scientifique, Commissariat à l'Energie Atomique et aux Energies Alternatives, UMR 7265 Biosciences and Biotechnologies Institute of Aix- Marseille, CEA/Cadarache, F-13108 Saint-Paul-lès-Durance, France
| | - Fabien Monnet
- Aix-Marseille University, Centre National de la Recherche Scientifique, Commissariat à l'Energie Atomique et aux Energies Alternatives, UMR 7265 Biosciences and Biotechnologies Institute of Aix- Marseille, CEA/Cadarache, F-13108 Saint-Paul-lès-Durance, France
- Université d'Avignon et des Pays de Vaucluse, F-84000 Avignon, France
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Liu Y, Patra B, Pattanaik S, Wang Y, Yuan L. GATA and Phytochrome Interacting Factor Transcription Factors Regulate Light-Induced Vindoline Biosynthesis in Catharanthus roseus. Plant Physiol 2019; 180:1336-1350. [PMID: 31123092 PMCID: PMC6752914 DOI: 10.1104/pp.19.00489] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Accepted: 05/03/2019] [Indexed: 05/18/2023]
Abstract
Catharanthus roseus is the exclusive source of an array of terpenoid indole alkaloids including the anticancer drugs vincristine and vinblastine, derived from the coupling of catharanthine and vindoline. Leaf-synthesized vindoline is regulated by light. A seven-step enzymatic process is involved in the sequential conversion of tabersonine to vindoline; however, the regulatory mechanism controlling the expression of genes encoding these enzymes has not been elucidated. Here, we identified CrGATA1, an Leu-Leu-Met domain GATA transcription factor that regulates light-induced vindoline biosynthesis in C. roseus seedlings. Expression of CrGATA1 and the vindoline pathway genes T16H2, T3O, T3R, D4H, and DAT was significantly induced by light. In addition, CrGATA1 activated the promoters of five light-responsive vindoline pathway genes in plant cells. Two GATC motifs in the D4H promoter were critical for CrGATA1-mediated transactivation. Transient overexpression of CrGATA1 in C. roseus seedlings resulted in up-regulation of vindoline pathway genes and increased vindoline accumulation. Conversely, virus-induced gene silencing of CrGATA1 in young C. roseus leaves significantly repressed key vindoline pathway genes and reduced vindoline accumulation. Furthermore, we showed that a C. roseus Phytochrome Interacting Factor, CrPIF1, is a repressor of CrGATA1 and vindoline biosynthesis. Transient overexpression or virus-induced gene silencing of CrPIF1 in C. roseus seedlings altered CrGATA1 and vindoline pathway gene expression in the dark. CrPIF1 repressed CrGATA1 and DAT promoter activity by binding to G/E-box/PBE elements. Our findings reveal a regulatory module involving Phytochrome Interacting Factor -GATA that governs light-mediated biosynthesis of specialized metabolites.
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Affiliation(s)
- Yongliang Liu
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China 510650
- Department of Plant and Soil Sciences and Kentucky Tobacco Research and Development Center, University of Kentucky, Lexington, Kentucky 40546
| | - Barunava Patra
- Department of Plant and Soil Sciences and Kentucky Tobacco Research and Development Center, University of Kentucky, Lexington, Kentucky 40546
| | - Sitakanta Pattanaik
- Department of Plant and Soil Sciences and Kentucky Tobacco Research and Development Center, University of Kentucky, Lexington, Kentucky 40546
| | - Ying Wang
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China 510650
| | - Ling Yuan
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China 510650
- Department of Plant and Soil Sciences and Kentucky Tobacco Research and Development Center, University of Kentucky, Lexington, Kentucky 40546
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Ullah MA, Tungmunnithum D, Garros L, Drouet S, Hano C, Abbasi BH. Effect of Ultraviolet-C Radiation and Melatonin Stress on Biosynthesis of Antioxidant and Antidiabetic Metabolites Produced in In Vitro Callus Cultures of Lepidium sativum L. Int J Mol Sci 2019; 20:E1787. [PMID: 30978911 PMCID: PMC6479895 DOI: 10.3390/ijms20071787] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 04/08/2019] [Accepted: 04/09/2019] [Indexed: 02/06/2023] Open
Abstract
Lepidium sativum L. is a rich source of polyphenols that have huge medicinal and pharmaceutical applications. In the current study, an effective abiotic elicitation strategy was designed for enhanced biosynthesis of polyphenols in callus culture of L. sativum. Callus was exposed to UV-C radiations for different time intervals and various concentrations of melatonin. Secondary metabolites were quantified by using high-performance liquid chromatography (HPLC). Results indicated the total secondary metabolite accumulation of nine quantified compounds was almost three fold higher (36.36 mg/g dry weight (DW)) in melatonin (20 μM) treated cultures, whereas, in response to UV-C (60 min), a 2.5 fold increase (32.33 mg/g DW) was recorded compared to control (13.94 mg/g DW). Metabolic profiling revealed the presence of three major phytochemicals, i.e., chlorogenic acid, kaemferol, and quercetin, in callus culture of L. sativum. Furthermore, antioxidant, antidiabetic, and enzymatic activities of callus cultures were significantly enhanced. Maximum antidiabetic activities (α-glucosidase: 57.84%; α-amylase: 62.66%) were recorded in melatonin (20 μM) treated callus cultures. Overall, melatonin proved to be an effect elicitor compared to UV-C and a positive correlation in these biological activities and phytochemical accumulation was observed. The present study provides a better comparison of both elicitors and their role in the initiation of physiological pathways for enhanced metabolites biosynthesis in vitro callus culture of L. sativum.
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Affiliation(s)
- Muhammad Asad Ullah
- Department of Biotechnology, Quaid-i-Azam University, Islamabad 45320, Pakistan.
| | - Duangjai Tungmunnithum
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA USC1328, Université d'Orléans, 45067 Orléans CEDEX 2, France.
- Department of Pharmaceutical Botany, Faculty of Pharmacy, Mahidol University, 447 Sri-Ayuthaya Road, Rajathevi, Bangkok 10400, Thailand.
| | - Laurine Garros
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA USC1328, Université d'Orléans, 45067 Orléans CEDEX 2, France.
- Institut de Chimie Organique et Analytique (ICOA) UMR7311, Université d'Orléans-CNRS, 45067 Orléans CEDEX 2, France.
- COSM'ACTIFS, Bioactifs et Cosmétiques, CNRS GDR3711, 45067 Orléans CEDEX 2, France.
| | - Samantha Drouet
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA USC1328, Université d'Orléans, 45067 Orléans CEDEX 2, France.
- COSM'ACTIFS, Bioactifs et Cosmétiques, CNRS GDR3711, 45067 Orléans CEDEX 2, France.
| | - Christophe Hano
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA USC1328, Université d'Orléans, 45067 Orléans CEDEX 2, France.
- COSM'ACTIFS, Bioactifs et Cosmétiques, CNRS GDR3711, 45067 Orléans CEDEX 2, France.
| | - Bilal Haider Abbasi
- Department of Biotechnology, Quaid-i-Azam University, Islamabad 45320, Pakistan.
- Laboratoire de Biologie des Ligneux et des Grandes Cultures (LBLGC), INRA USC1328, Université d'Orléans, 45067 Orléans CEDEX 2, France.
- COSM'ACTIFS, Bioactifs et Cosmétiques, CNRS GDR3711, 45067 Orléans CEDEX 2, France.
- EA2106 Biomolécules et Biotechnologies Végétales, Université de Tours, 37000 Tours, France.
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Cvetkovska M, Orgnero S, Hüner NPA, Smith DR. The enigmatic loss of light-independent chlorophyll biosynthesis from an Antarctic green alga in a light-limited environment. New Phytol 2019; 222:651-656. [PMID: 30506801 DOI: 10.1111/nph.15623] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 11/26/2018] [Indexed: 06/09/2023]
Affiliation(s)
- Marina Cvetkovska
- Department of Biology, University of Western Ontario, London, Ontario, N6A 5B7, Canada
| | - Shane Orgnero
- Department of Biology, University of Western Ontario, London, Ontario, N6A 5B7, Canada
| | - Norman P A Hüner
- Department of Biology, University of Western Ontario, London, Ontario, N6A 5B7, Canada
| | - David Roy Smith
- Department of Biology, University of Western Ontario, London, Ontario, N6A 5B7, Canada
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Li C, Liu S, Zhang W, Chen K, Zhang P. Transcriptional profiling and physiological analysis reveal the critical roles of ROS-scavenging system in the Antarctic moss Pohlia nutans under Ultraviolet-B radiation. Plant Physiol Biochem 2019; 134:113-122. [PMID: 30448024 DOI: 10.1016/j.plaphy.2018.10.034] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 09/23/2018] [Accepted: 10/30/2018] [Indexed: 05/21/2023]
Abstract
Organisms suffer more harmful ultraviolet radiation in the Antarctica due to the ozone layer destruction. Bryophytes are the dominant flora in the Antarctic continent. However, the molecular mechanism of Antarctic moss adaptation to UV-B radiation remains unclear. In the research, the transcriptional profiling of the Antarctic moss Pohlia nutans under UV-B radiation was conducted by Illumina HiSeq2500 platform. Totally, 72,922 unigenes with N50 length of 1434 bp were generated. Differential expression analysis demonstrated that 581 unigenes were markedly up-regulated and 249 unigenes were significantly down-regulated. The gene clustering analysis showed that these differentially expressed genes (DEGs) includes several transcription factors, photolyases, antioxidant enzymes, and flavonoid biosynthesis-related genes. Further analyses suggested that the content of malondialdehyde (MDA), the activities of several antioxidant enzymes (i.e., catalase, peroxidase, and glutathione reductase) were significantly enhanced upon UV-B treatment. Furthermore, the content of flavonoids and the gene expression levels of their synthesis-related enzymes were also markedly increased when plants were exposed to UV-B light. Therefore, these results suggested that the pathways of antioxidant enzymes, flavonoid synthesis and photolyases were the main defense systems that contributed to the adaption of Pohlia nutans to the enhanced UV-B radiation in Antarctica.
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Affiliation(s)
- Chengcheng Li
- National Glycoengineering Research Center, School of Life Sciences, Shandong University, Jinan, 250100, China
| | - Shenghao Liu
- Key Laboratory of Marine Bioactive Substance, The First Institute of Oceanography, State Oceanic Administration, Qingdao, 266061, China
| | - Wei Zhang
- School of Environment, Qingdao University, Qingdao, 266061, China
| | - Kaoshan Chen
- National Glycoengineering Research Center, School of Life Sciences, Shandong University, Jinan, 250100, China
| | - Pengying Zhang
- National Glycoengineering Research Center, School of Life Sciences, Shandong University, Jinan, 250100, China.
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Clayton WA, Albert NW, Thrimawithana AH, McGhie TK, Deroles SC, Schwinn KE, Warren BA, McLachlan ARG, Bowman JL, Jordan BR, Davies KM. UVR8-mediated induction of flavonoid biosynthesis for UVB tolerance is conserved between the liverwort Marchantia polymorpha and flowering plants. Plant J 2018; 96:503-517. [PMID: 30044520 DOI: 10.1111/tpj.14044] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 07/04/2018] [Accepted: 07/06/2018] [Indexed: 05/21/2023]
Abstract
Damaging UVB radiation is a major abiotic stress facing land plants. In angiosperms the UV RESISTANCE LOCUS8 (UVR8) photoreceptor coordinates UVB responses, including inducing biosynthesis of protective flavonoids. We characterised the UVB responses of Marchantia polymorpha (marchantia), the model species for the liverwort group of basal plants. Physiological, chemical and transcriptomic analyses were conducted on wild-type marchantia exposed to three different UVB regimes. CRISPR/Cas9 was used to obtain plant lines with mutations for components of the UVB signal pathway or the flavonoid biosynthetic pathway, and transgenics overexpressing the marchantia UVR8 sequence were generated. The mutant and transgenic lines were analysed for changes in flavonoid content, their response to UVB exposure, and transcript abundance of a set of 48 genes that included components of the UVB response pathway characterised for angiosperms. The marchantia UVB response included many components in common with Arabidopsis, including production of UVB-absorbing flavonoids, the central activator role of ELONGATED HYPOCOTYL5 (HY5), and negative feedback regulation by REPRESSOR OF UV-B PHOTOMORPHOGENESIS1 (RUP1). Notable differences included the greater importance of CHALCONE ISOMERASE-LIKE (CHIL). Mutants disrupted in the response pathway (hy5) or flavonoid production (chalcone isomerase, chil) were more easily damaged by UVB. Mutants (rup1) or transgenics (35S:MpMYB14) with increased flavonoid content had increased UVB tolerance. The results suggest that UVR8-mediated flavonoid induction is a UVB tolerance character conserved across land plants and may have been an early adaptation to life on land.
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Affiliation(s)
- William A Clayton
- The New Zealand Institute for Plant & Food Research Limited, Private Bag 11600, Palmerston North, 4442, New Zealand
- Faculty of Agriculture and Life Sciences, Lincoln University, Christchurch, 7647, New Zealand
| | - Nick W Albert
- The New Zealand Institute for Plant & Food Research Limited, Private Bag 11600, Palmerston North, 4442, New Zealand
| | - Amali H Thrimawithana
- The New Zealand Institute for Plant & Food Research Limited, Private Bag 92169, Auckland Mail Centre, Auckland, 1142, New Zealand
| | - Tony K McGhie
- The New Zealand Institute for Plant & Food Research Limited, Private Bag 11600, Palmerston North, 4442, New Zealand
| | - Simon C Deroles
- The New Zealand Institute for Plant & Food Research Limited, Private Bag 11600, Palmerston North, 4442, New Zealand
| | - Kathy E Schwinn
- The New Zealand Institute for Plant & Food Research Limited, Private Bag 11600, Palmerston North, 4442, New Zealand
| | - Ben A Warren
- The New Zealand Institute for Plant & Food Research Limited, Private Bag 92169, Auckland Mail Centre, Auckland, 1142, New Zealand
| | - Andrew R G McLachlan
- The New Zealand Institute for Plant & Food Research Limited, Private Bag 11600, Palmerston North, 4442, New Zealand
| | - John L Bowman
- School of Biological Sciences, Monash University, Melbourne, Victoria, 3800, Australia
| | - Brian R Jordan
- Faculty of Agriculture and Life Sciences, Lincoln University, Christchurch, 7647, New Zealand
| | - Kevin M Davies
- The New Zealand Institute for Plant & Food Research Limited, Private Bag 11600, Palmerston North, 4442, New Zealand
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11
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Yang J, Li B, Shi W, Gong Z, Chen L, Hou Z. Transcriptional Activation of Anthocyanin Biosynthesis in Developing Fruit of Blueberries ( Vaccinium corymbosum L.) by Preharvest and Postharvest UV Irradiation. J Agric Food Chem 2018; 66:10931-10942. [PMID: 30269498 DOI: 10.1021/acs.jafc.8b03081] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The effect and mechanism of preharvest and postharvest ultraviolet (UV) irradiation on anthocyanin biosynthesis during blueberry development were investigated. The results showed that preharvest UV-B,C and postharvest UV-A,B,C irradiation significantly promoted anthocyanin biosynthesis and the transcripts of late biosynthetic genes (LBG) VcDFR, VcANS, VcUFGT, and VcMYB transcription factor as well as DFR and UFGT activities in anthocyanin pathway in a UV wavelength- and developmental stage-dependent manner. VcMYB expression was positively correlated with that of VcANS and VcUFGT and coincided with anthocyanin biosynthesis responding to the UV radiation. Sugar decreased during postharvest but increased during preharvest UV radiation in mature fruit. Our results indicate that UV-responsive production of anthocyanins is mainly caused by the activation of anthocyanin downstream pathway genes, which could be upregulated by VcMYB. Furthermore, different potential response mechanisms may exist between preharvest and postharvest UV radiation in blueberries, involving a systemic response in living plants and a nonsystemic response in postharvest fruit.
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Affiliation(s)
- Junfeng Yang
- Key Laboratory for Silviculture and Conservation of Ministry of Education, Research & Development Center of Blueberry , Beijing Forestry University , Beijing 100083 , China
- The Key Laboratory of Plant Resources/Beijing Botanical Garden , Institute of Botany, The Chinese Academy of Sciences , Beijing 100093 , China
- The Chinese Academy of Sciences , Beijing 100049 , China
| | - Binbin Li
- Key Laboratory for Silviculture and Conservation of Ministry of Education, Research & Development Center of Blueberry , Beijing Forestry University , Beijing 100083 , China
| | - Wenjun Shi
- Key Laboratory for Silviculture and Conservation of Ministry of Education, Research & Development Center of Blueberry , Beijing Forestry University , Beijing 100083 , China
| | - Zhongzhi Gong
- Key Laboratory for Silviculture and Conservation of Ministry of Education, Research & Development Center of Blueberry , Beijing Forestry University , Beijing 100083 , China
| | - Lu Chen
- Key Laboratory for Silviculture and Conservation of Ministry of Education, Research & Development Center of Blueberry , Beijing Forestry University , Beijing 100083 , China
| | - Zhixia Hou
- Key Laboratory for Silviculture and Conservation of Ministry of Education, Research & Development Center of Blueberry , Beijing Forestry University , Beijing 100083 , China
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Surjadinata BB, Jacobo-Velázquez DA, Cisneros-Zevallos L. UVA, UVB and UVC Light Enhances the Biosynthesis of Phenolic Antioxidants in Fresh-Cut Carrot through a Synergistic Effect with Wounding. Molecules 2017; 22:E668. [PMID: 28441769 PMCID: PMC6154643 DOI: 10.3390/molecules22040668] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 04/13/2017] [Accepted: 04/21/2017] [Indexed: 11/29/2022] Open
Abstract
Previously, we found that phenolic content and antioxidant capacity (AOX) in carrots increased with wounding intensity. It was also reported that UV radiation may trigger the phenylpropanoid metabolism in plant tissues. Here, we determined the combined effect of wounding intensity and UV radiation on phenolic compounds, AOX, and the phenylalanine ammonia-lyase (PAL) activity of carrots. Accordingly, phenolic content, AOX, and PAL activity increased in cut carrots with the duration of UVC radiation, whereas whole carrots showed no increase. Carrot pies showed a higher increase compared to slices and shreds. Phenolics, AOX, and PAL activity also increased in cut carrots exposed to UVA or UVB. The major phenolics were chlorogenic acid and its isomers, ferulic acid, and isocoumarin. The type of UV radiation affected phenolic profiles. Chlorogenic acid was induced by all UV radiations but mostly by UVB and UVC, ferulic acid was induced by all UV lights to comparable levels, while isocoumarin and 4,5-diCQA was induced mainly by UVB and UVC compared to UVA. In general, total phenolics correlated linearly with AOX for all treatments. A reactive oxygen species (ROS) mediated hypothetical mechanism explaining the synergistic effect of wounding and different UV radiation stresses on phenolics accumulation in plants is herein proposed.
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Affiliation(s)
- Bernadeth B Surjadinata
- Department of Horticultural Sciences, Texas A&M University, College Station, TX 778432-133, USA.
| | - Daniel A Jacobo-Velázquez
- Tecnológico de Monterrey, Escuela de Ingeniería y Ciencias, Centro de Biotecnología FEMSA, Av. Eugenio Garza Sada 2501 Sur, C.P. 64849 Monterrey, N.L., Mexico.
| | - Luis Cisneros-Zevallos
- Department of Horticultural Sciences, Texas A&M University, College Station, TX 778432-133, USA.
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Jadaun JS, Sangwan NS, Narnoliya LK, Singh N, Bansal S, Mishra B, Sangwan RS. Over-expression of DXS gene enhances terpenoidal secondary metabolite accumulation in rose-scented geranium and Withania somnifera: active involvement of plastid isoprenogenic pathway in their biosynthesis. Physiol Plant 2017; 159:381-400. [PMID: 27580641 DOI: 10.1111/ppl.12507] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Revised: 04/18/2016] [Accepted: 08/05/2016] [Indexed: 05/08/2023]
Abstract
Rose-scented geranium (Pelargonium spp.) is one of the most important aromatic plants and is well known for its diverse perfumery uses. Its economic importance is due to presence of fragrance rich essential oil in its foliage. The essential oil is a mixture of various volatile phytochemicals which are mainly terpenes (isoprenoids) in nature. In this study, on the geranium foliage genes related to isoprenoid biosynthesis (DXS, DXR and HMGR) were isolated, cloned and confirmed by sequencing. Further, the first gene of 2-C-methyl-d-erythritol-4-phosphate (MEP) pathway, 1-deoxy-d-xylulose-5-phosphate synthase (GrDXS), was made full length by using rapid amplification of cDNA ends strategy. GrDXS contained a 2157 bp open reading frame that encoded a polypeptide of 792 amino acids having calculated molecular weight 77.5 kDa. This study is first report on heterologous expression and kinetic characterization of any gene from this economically important plant. Expression analysis of these genes was performed in different tissues as well as at different developmental stages of leaves. In response to external elicitors, such as methyl jasmonate, salicylic acid, light and wounding, all the three genes showed differential expression profiles. Further GrDXS was over expressed in the homologous (rose-scented geranium) as well as in heterologous (Withania somnifera) plant systems through genetic transformation approach. The over-expression of GrDXS led to enhanced secondary metabolites production (i.e. essential oil in rose-scented geranium and withanolides in W. somnifera). To the best of our knowledge, this is the first report showing the expression profile of the three genes related to isoprenoid biosynthesis pathways operated in rose-scented geranium as well as functional characterization study of any gene from rose-scented geranium through a genetic transformation system.
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Affiliation(s)
- Jyoti Singh Jadaun
- Department of Metabolic and Structural Biology, CSIR-Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), Lucknow 226015, India
| | - Neelam S Sangwan
- Department of Metabolic and Structural Biology, CSIR-Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), Lucknow 226015, India
| | - Lokesh K Narnoliya
- Department of Metabolic and Structural Biology, CSIR-Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), Lucknow 226015, India
| | - Neha Singh
- Department of Metabolic and Structural Biology, CSIR-Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), Lucknow 226015, India
| | - Shilpi Bansal
- Department of Metabolic and Structural Biology, CSIR-Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), Lucknow 226015, India
| | - Bhawana Mishra
- Department of Metabolic and Structural Biology, CSIR-Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), Lucknow 226015, India
| | - Rajender Singh Sangwan
- Department of Metabolic and Structural Biology, CSIR-Central Institute of Medicinal and Aromatic Plants (CSIR-CIMAP), Lucknow 226015, India
- Center of Innovative and Applied Bioprocessing (A National Institute under Department of Biotechnology, Govt. of India), C-127, Phase-8, Industrial Area, S.A.S. Nagar, Mohali - 160071, Punjab, India
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14
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Kosourov S, Murukesan G, Jokela J, Allahverdiyeva Y. Carotenoid Biosynthesis in Calothrix sp. 336/3: Composition of Carotenoids on Full Medium, During Diazotrophic Growth and After Long-Term H2 Photoproduction. Plant Cell Physiol 2016; 57:2269-2282. [PMID: 27519311 DOI: 10.1093/pcp/pcw143] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 08/06/2016] [Indexed: 06/06/2023]
Abstract
The carotenoid composition of the filamentous heterocystous N2-fixing cyanobacterium Calothrix sp. 336/3 was investigated under three conditions: in full medium (non-diazotrophic growth); in the absence of combined nitrogen (diazotrophic growth); and after long-term H2 photoproduction (diazotrophic medium and absence of nitrogen in the atmosphere). Anabaena sp. PCC 7120 and its ΔhupL mutant with disrupted uptake hydrogenase were used as reference strains. Analysis of identified carotenoids and enzymes involved in carotenogenesis showed the presence of three distinct biosynthetic pathways in Calothrix sp. 336/3. The first one is directed towards biosynthesis of myxoxanthophylls, such as myxol 2'-methylpentoside and 2-hydroxymyxol 2'-methylpentoside. The second pathway results in production of hydroxylated carotenoids, such as zeaxanthin, caloxanthin and nostoxanthin, and the last pathway is responsible for biosynthesis of echinenone and hydroxylated forms of ketocarotenoids, such as 3'-hydroxyechinenone and adonixanthin. We found that carotenogenesis in filamentous heterocystous cyanobacteria varies depending on the nitrogen status of the cultures, with significant accumulation of echinenone during diazotrophic growth at the expense of β-carotene. Under the severe N deficiency and high CO2 supply, which leads to efficient H2 photoproduction, cyanobacteria degrade echinenone and β-carotene, and accumulate glycosylated and hydroxylated carotenoids, such as myxol (or ketomyxol) 2'-methylpentosides, 3'-hydroxyechinenone and zeaxanthin. We suggest that the stability of the photosynthetic apparatus in Calothrix sp. 336/3 cells under N deficiency and high carbon conditions, which also appeared as the partial recovery of the pigment composition by the end of the long-term (∼1 month) H2 photoproduction process, might be mediated by a high content of hydroxycarotenoids.
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Affiliation(s)
- Sergey Kosourov
- Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku, Finland
| | - Gayathri Murukesan
- Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku, Finland
| | - Jouni Jokela
- Division of Microbiology and Biotechnology, Department of Food and Environmental Sciences, University of Helsinki, Helsinki, Finland
| | - Yagut Allahverdiyeva
- Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku, Finland
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15
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Cheng S, Fu X, Mei X, Zhou Y, Du B, Watanabe N, Yang Z. Regulation of biosynthesis and emission of volatile phenylpropanoids/benzenoids in petunia× hybrida flowers by multi-factors of circadian clock, light, and temperature. Plant Physiol Biochem 2016; 107:1-8. [PMID: 27235646 DOI: 10.1016/j.plaphy.2016.05.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 05/03/2016] [Accepted: 05/18/2016] [Indexed: 05/24/2023]
Abstract
Floral volatile phenylpropanoids and benzenoids (VPBs) play important ecological functions and have potential economic applications. Little is known about how multi-factors in integration regulate the formation and emission of floral VPBs. In the present study, we investigated effects of multi factors including endogenous circadian clock, light, and temperature on the formation and emission of VPBs, which are major volatiles in flowers of Petunia× hybrida cv. 'Mitchell Diploid'. Endogenous circadian clock was proposed as the most important factor regulating rhythmic emission of VPBs and expressions of structural genes involved in the upstream biosynthetic pathway of VPBs, but did not affect expression levels of structural genes involved in the downstream pathway and VPBs-related regulators. In contrast to light, temperature was a more constant factor affecting emission of VPBs. VPBs emission could be inhibited within a short time by increasing temperature. The information will contribute to our understanding of emission mechanism of floral volatiles.
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Affiliation(s)
- Sihua Cheng
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou, 510650, China; University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, China
| | - Xiumin Fu
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou, 510650, China
| | - Xin Mei
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou, 510650, China
| | - Ying Zhou
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou, 510650, China
| | - Bing Du
- College of Food, South China Agricultural University, Wushan Road, Tianhe District, Guangzhou, 510642, China; Juxiangyuan Health Food (Zhongshan) Co., Ltd., No. 13, Yandong Second Road, Torch Development Zone, Zhongshan, 528400, China
| | - Naoharu Watanabe
- Graduate School of Science and Technology, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu, 432-8561, Japan
| | - Ziyin Yang
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement & Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Xingke Road 723, Tianhe District, Guangzhou, 510650, China; University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, China.
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16
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Karppinen K, Zoratti L, Sarala M, Carvalho E, Hirsimäki J, Mentula H, Martens S, Häggman H, Jaakola L. Carotenoid metabolism during bilberry (Vaccinium myrtillus L.) fruit development under different light conditions is regulated by biosynthesis and degradation. BMC Plant Biol 2016; 16:95. [PMID: 27098458 PMCID: PMC4839083 DOI: 10.1186/s12870-016-0785-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 04/14/2016] [Indexed: 05/06/2023]
Abstract
BACKGROUND Carotenoids are important pigments and precursors for central signaling molecules associated in fruit development and ripening. Carotenoid metabolism has been studied especially in the climacteric tomato fruit but the content of carotenoids and the regulation of their metabolism have been shown to be highly variable between fruit species. Non-climacteric berries of the genus Vaccinium are among the best natural sources of health-beneficial flavonoids but not studied previously for carotenoid biosynthesis. RESULTS In this study, carotenoid biosynthetic genes, PSY, PDS, ZDS, CRTISO, LCYB, LCYE, BCH and CYP450-BCH, as well as a carotenoid cleavage dioxygenase CCD1 were identified from bilberry (V. myrtillus L.) fruit and their expression was studied along with carotenoid composition during fruit development under different photoperiod and light quality conditions. Bilberry was found to be a good source of carotenoids among fruits and berries. The most abundant carotenoids throughout the berry development were lutein and β-carotene, which were accompanied by lower amounts of 9Z-β-carotene, violaxanthin, neoxanthin, zeaxanthin, antheraxanthin and β-cryptoxanthin. The expression patterns of the biosynthetic genes in ripening fruits indicated a metabolic flux towards β-branch of the carotenoid pathway. However, the carotenoid levels decreased in both the β-branch and ε,β-branch towards bilberry fruit ripening along with increased VmCCD1 expression, similarly to VmNCED1, indicating enzymatic carotenoid cleavage and degradation. Intense white light conditions increased the expression of the carotenoid biosynthetic genes but also the expression of the cleavage genes VmCCD1 and VmNCED1, especially in unripe fruits. Instead, mature bilberry fruits responded specifically to red/far-red light wavelengths by inducing the expression of both the carotenoid biosynthetic and the cleavage genes indicating tissue and developmental stage specific regulation of apocarotenoid formation by light quality. CONCLUSIONS This is the first report of carotenoid biosynthesis in Vaccinium berries. Our results indicate that both transcriptional regulation of the key biosynthetic genes and the enzymatic degradation of the produced carotenoids to apocarotenoids have significant roles in the determination of the carotenoid content and have overall effect on the metabolism during the bilberry fruit ripening.
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Affiliation(s)
- Katja Karppinen
- />Genetics and Physiology Unit, University of Oulu, P.O. Box 3000, FI-90014 Oulu, Finland
- />Climate laboratory Holt, Department of Arctic and Marine Biology, UiT the Arctic University of Norway, NO-9037 Tromsø, Norway
| | - Laura Zoratti
- />Genetics and Physiology Unit, University of Oulu, P.O. Box 3000, FI-90014 Oulu, Finland
| | - Marian Sarala
- />Genetics and Physiology Unit, University of Oulu, P.O. Box 3000, FI-90014 Oulu, Finland
| | - Elisabete Carvalho
- />Fondazione Edmund Mach, Research and Innovation Center, via E. Mach 1, 38010, San Michele all’Adige, TN Italy
| | - Jenni Hirsimäki
- />Genetics and Physiology Unit, University of Oulu, P.O. Box 3000, FI-90014 Oulu, Finland
| | - Helmi Mentula
- />Genetics and Physiology Unit, University of Oulu, P.O. Box 3000, FI-90014 Oulu, Finland
| | - Stefan Martens
- />Fondazione Edmund Mach, Research and Innovation Center, via E. Mach 1, 38010, San Michele all’Adige, TN Italy
| | - Hely Häggman
- />Genetics and Physiology Unit, University of Oulu, P.O. Box 3000, FI-90014 Oulu, Finland
| | - Laura Jaakola
- />Climate laboratory Holt, Department of Arctic and Marine Biology, UiT the Arctic University of Norway, NO-9037 Tromsø, Norway
- />NIBIO, Norwegian Institute of Bioeconomy Research, P.O. Box 115, NO-1431 Ås, Norway
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17
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Gnanasekaran T, Karcher D, Nielsen AZ, Martens HJ, Ruf S, Kroop X, Olsen CE, Motawie MS, Pribil M, Møller BL, Bock R, Jensen PE. Transfer of the cytochrome P450-dependent dhurrin pathway from Sorghum bicolor into Nicotiana tabacum chloroplasts for light-driven synthesis. J Exp Bot 2016; 67:2495-506. [PMID: 26969746 PMCID: PMC4809297 DOI: 10.1093/jxb/erw067] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Plant chloroplasts are light-driven cell factories that have great potential to act as a chassis for metabolic engineering applications. Using plant chloroplasts, we demonstrate how photosynthetic reducing power can drive a metabolic pathway to synthesise a bio-active natural product. For this purpose, we stably engineered the dhurrin pathway from Sorghum bicolor into the chloroplasts of Nicotiana tabacum (tobacco). Dhurrin is a cyanogenic glucoside and its synthesis from the amino acid tyrosine is catalysed by two membrane-bound cytochrome P450 enzymes (CYP79A1 and CYP71E1) and a soluble glucosyltransferase (UGT85B1), and is dependent on electron transfer from a P450 oxidoreductase. The entire pathway was introduced into the chloroplast by integrating CYP79A1, CYP71E1, and UGT85B1 into a neutral site of the N. tabacum chloroplast genome. The two P450s and the UGT85B1 were functional when expressed in the chloroplasts and converted endogenous tyrosine into dhurrin using electrons derived directly from the photosynthetic electron transport chain, without the need for the presence of an NADPH-dependent P450 oxidoreductase. The dhurrin produced in the engineered plants amounted to 0.1-0.2% of leaf dry weight compared to 6% in sorghum. The results obtained pave the way for plant P450s involved in the synthesis of economically important compounds to be engineered into the thylakoid membrane of chloroplasts, and demonstrate that their full catalytic cycle can be driven directly by photosynthesis-derived electrons.
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Affiliation(s)
- Thiyagarajan Gnanasekaran
- Copenhagen Plant Science Centre, Center for Synthetic Biology bioSYNergy, Villum Research Center "Plant Plasticity", Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Copenhagen, Denmark
| | - Daniel Karcher
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Agnieszka Zygadlo Nielsen
- Copenhagen Plant Science Centre, Center for Synthetic Biology bioSYNergy, Villum Research Center "Plant Plasticity", Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Copenhagen, Denmark
| | - Helle Juel Martens
- Copenhagen Plant Science Centre, Center for Synthetic Biology bioSYNergy, Villum Research Center "Plant Plasticity", Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Copenhagen, Denmark
| | - Stephanie Ruf
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Xenia Kroop
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Carl Erik Olsen
- Copenhagen Plant Science Centre, Center for Synthetic Biology bioSYNergy, Villum Research Center "Plant Plasticity", Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Copenhagen, Denmark
| | - Mohammed Saddik Motawie
- Copenhagen Plant Science Centre, Center for Synthetic Biology bioSYNergy, Villum Research Center "Plant Plasticity", Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Copenhagen, Denmark
| | - Mathias Pribil
- Copenhagen Plant Science Centre, Center for Synthetic Biology bioSYNergy, Villum Research Center "Plant Plasticity", Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Copenhagen, Denmark
| | - Birger Lindberg Møller
- Copenhagen Plant Science Centre, Center for Synthetic Biology bioSYNergy, Villum Research Center "Plant Plasticity", Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Copenhagen, Denmark
| | - Ralph Bock
- Max Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Poul Erik Jensen
- Copenhagen Plant Science Centre, Center for Synthetic Biology bioSYNergy, Villum Research Center "Plant Plasticity", Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Copenhagen, Denmark
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18
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Rikiishi K, Matsuura T, Ikeda Y, Maekawa M. Light Inhibition of Shoot Regeneration Is Regulated by Endogenous Abscisic Acid Level in Calli Derived from Immature Barley Embryos. PLoS One 2015; 10:e0145242. [PMID: 26670930 PMCID: PMC4682856 DOI: 10.1371/journal.pone.0145242] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 11/30/2015] [Indexed: 12/02/2022] Open
Abstract
Shoot regeneration in calli derived from immature barley embryos is regulated by light conditions during the callus-induction period. Barley cultivars Kanto Nijo-5 (KN5) and K-3 (K3) showed lower efficiency of shoot regeneration in a 16-h photoperiod during callus-induction than those in continuous darkness, whereas shoot regeneration was enhanced in cultures under a 16-h photoperiod in Golden Promise (GP) and Lenins (LN). These cultivars were classified as photo-inhibition type (KN5 and K3) or photo-induction type (GP and LN) according to their response to light. Contents of endogenous plant hormones were determined in calli cultured under a 16-h photoperiod and continuous darkness. In photo-inhibition type, higher accumulation of abscisic acid (ABA) was detected in calli cultured under a 16-h photoperiod, whereas calli showed lower levels of endogenous ABA in continuous darkness. However, cultivars of photo-induction type showed lower levels of ABA in calli cultured under both light conditions, similarly to photo-inhibition type in continuous darkness. Exogenous ABA inhibited the callus growth and shoot regeneration independent of light conditions in all cultivars. In photo-inhibition type, lower levels of endogenous ABA induced by ABA biosynthesis inhibitor, fluridone, reduced the photo-inhibition of shoot regeneration. Expression of ABA biosynthesis gene, HvNCED1, in calli was regulated by the light conditions. Higher expression was observed in calli cultured under a 16-h photoperiod. These results indicate that ABA biosynthesis could be activated through the higher expression of HvNCED1 in a 16-h photoperiod and that the higher accumulations of ABA inhibit shoot regeneration in the photo-inhibition type cultivars.
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Affiliation(s)
- Kazuhide Rikiishi
- Institute of Plant Science and Resources, Okayama University, Kurashiki, Okayama, Japan
- * E-mail:
| | - Takakazu Matsuura
- Institute of Plant Science and Resources, Okayama University, Kurashiki, Okayama, Japan
| | - Yoko Ikeda
- Institute of Plant Science and Resources, Okayama University, Kurashiki, Okayama, Japan
| | - Masahiko Maekawa
- Institute of Plant Science and Resources, Okayama University, Kurashiki, Okayama, Japan
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Hu J, Chen G, Zhang Y, Cui B, Yin W, Yu X, Zhu Z, Hu Z. Anthocyanin composition and expression analysis of anthocyanin biosynthetic genes in kidney bean pod. Plant Physiol Biochem 2015; 97:304-312. [PMID: 26512970 DOI: 10.1016/j.plaphy.2015.10.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 10/14/2015] [Accepted: 10/14/2015] [Indexed: 06/05/2023]
Abstract
Kidney bean (Phaseolus vulgaris L.) is an important dietary legume crop cultivated and consumed worldwide. A purple cultivar (Zi Bawang) and a green cultivar (Chun Qiu), the main difference of which is in the pod skin color, were selected for the study. Malvidin 3, 5-diglucoside is identified as the major anthocyanin in the pod skin of Zi Bawang by HPLC-ESI-MS/MS. Three regulatory genes PvMYB1, PvMYB2, PvTT8-1 and most structural genes are dramatically up-regulated in purple pod skin compared to those in other materials. Significantly decreased expression levels of all regulatory genes and most biosynthetic genes are also detected in the purple skin of pods covered with bags compared to non-covered ones. All the results suggest that PvMYB1, PvMYB2 and PvTT8-1 might play a critical role in transcriptional activation of most anthocyanin biosynthetic genes in purple kidney bean pod.
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Affiliation(s)
- Jingtao Hu
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Bioengineering College, Chongqing University, Campus B, Room 515, 174 Shapingba Main Street, Chongqing 400044, PR China
| | - Guoping Chen
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Bioengineering College, Chongqing University, Campus B, Room 515, 174 Shapingba Main Street, Chongqing 400044, PR China
| | - Yanjie Zhang
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Bioengineering College, Chongqing University, Campus B, Room 515, 174 Shapingba Main Street, Chongqing 400044, PR China
| | - Baolu Cui
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Bioengineering College, Chongqing University, Campus B, Room 515, 174 Shapingba Main Street, Chongqing 400044, PR China
| | - Wencheng Yin
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Bioengineering College, Chongqing University, Campus B, Room 515, 174 Shapingba Main Street, Chongqing 400044, PR China
| | - Xiaohui Yu
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Bioengineering College, Chongqing University, Campus B, Room 515, 174 Shapingba Main Street, Chongqing 400044, PR China
| | - Zhiguo Zhu
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Bioengineering College, Chongqing University, Campus B, Room 515, 174 Shapingba Main Street, Chongqing 400044, PR China
| | - Zongli Hu
- Key Laboratory of Biorheological Science and Technology (Chongqing University), Ministry of Education, Bioengineering College, Chongqing University, Campus B, Room 515, 174 Shapingba Main Street, Chongqing 400044, PR China.
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Jiao J, Gai QY, Wang W, Luo M, Gu CB, Fu YJ, Ma W. Ultraviolet Radiation-Elicited Enhancement of Isoflavonoid Accumulation, Biosynthetic Gene Expression, and Antioxidant Activity in Astragalus membranaceus Hairy Root Cultures. J Agric Food Chem 2015; 63:8216-8224. [PMID: 26370303 DOI: 10.1021/acs.jafc.5b03138] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In this work, Astragalus membranaceus hairy root cultures (AMHRCs) were exposed to ultraviolet radiation (UV-A, UV-B, and UV-C) for promoting isoflavonoid accumulation. The optimum enhancement for isoflavonoid production was achieved in 34-day-old AMHRCs elicited by 86.4 kJ/m(2) of UV-B. The resulting isoflavonoid yield was 533.54 ± 13.61 μg/g dry weight (DW), which was 2.29-fold higher relative to control (232.93 ± 3.08 μg/g DW). UV-B up-regulated the transcriptional expressions of all investigated genes involved in isoflavonoid biosynthetic pathway. PAL and C4H were found to be two potential key genes that controlled isoflavonoid biosynthesis. Moreover, a significant increase was noted in antioxidant activity of extracts from UV-B-elicited AMHRCs (IC50 values = 0.85 and 1.08 mg/mL) in comparison with control (1.38 and 1.71 mg/mL). Overall, this study offered a feasible elicitation strategy to enhance isoflavonoid accumulation in AMHRCs and also provided a basis for metabolic engineering of isoflavonoid biosynthesis in the future.
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Affiliation(s)
| | - Qing-Yan Gai
- Collaborative Innovation Center for Development and Utilization of Forest Resources , Harbin, Heilongjiang 150040, People's Republic of China
| | - Wei Wang
- Collaborative Innovation Center for Development and Utilization of Forest Resources , Harbin, Heilongjiang 150040, People's Republic of China
| | - Meng Luo
- Collaborative Innovation Center for Development and Utilization of Forest Resources , Harbin, Heilongjiang 150040, People's Republic of China
| | - Cheng-Bo Gu
- Collaborative Innovation Center for Development and Utilization of Forest Resources , Harbin, Heilongjiang 150040, People's Republic of China
| | - Yu-Jie Fu
- Collaborative Innovation Center for Development and Utilization of Forest Resources , Harbin, Heilongjiang 150040, People's Republic of China
| | - Wei Ma
- School of Pharmaceutical, Heilongjiang University of Chinese Medicine , Harbin, Heilongjiang 150040, People's Republic of China
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Liu Z, Zhang Y, Wang J, Li P, Zhao C, Chen Y, Bi Y. Phytochrome-interacting factors PIF4 and PIF5 negatively regulate anthocyanin biosynthesis under red light in Arabidopsis seedlings. Plant Sci 2015; 238:64-72. [PMID: 26259175 DOI: 10.1016/j.plantsci.2015.06.001] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Revised: 05/30/2015] [Accepted: 06/01/2015] [Indexed: 05/04/2023]
Abstract
Light is an important environmental factor inducing anthocyanin accumulation in plants. Phytochrome-interacting factors (PIFs) have been shown to be a family of bHLH transcription factors involved in light signaling in Arabidopsis. Red light effectively increased anthocyanin accumulation in wild-type Col-0, whereas the effects were enhanced in pif4 and pif5 mutants but impaired in overexpression lines PIF4OX and PIF5OX, indicating that PIF4 and PIF5 are both negative regulators for red light-induced anthocyanin accumulation. Consistently, transcript levels of several genes involved in anthocyanin biosynthesis and regulatory pathway, including CHS, F3'H, DFR, LDOX, PAP1 and TT8, were significantly enhanced in mutants pif4 and pif5 but decreased in PIF4OX and PIF5OX compared to in Col-0, indicating that PIF4 and PIF5 are transcriptional repressor of these gene. Transient expression assays revealed that PIF4 and PIF5 could repress red light-induced promoter activities of F3'H and DFR in Arabidopsis protoplasts. Furthermore, chromatin immunoprecipitation-quantitative PCR (ChIP-qPCR) test and electrophoretic mobility shift assay (EMSA) showed that PIF5 could directly bind to G-box motifs present in the promoter of DFR. Taken together, these results suggest that PIF4 and PIF5 negatively regulate red light-induced anthocyanin accumulation through transcriptional repression of the anthocyanin biosynthetic genes in Arabidopsis.
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Affiliation(s)
- Zhongjuan Liu
- College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, Gansu 73000, People's Republic of China; Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, People's Republic of China
| | - Yongqiang Zhang
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, People's Republic of China
| | - Jianfeng Wang
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, People's Republic of China
| | - Ping Li
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, People's Republic of China
| | - Chengzhou Zhao
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, People's Republic of China
| | - Yadi Chen
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, People's Republic of China
| | - Yurong Bi
- Key Laboratory of Cell Activities and Stress Adaptations, Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, People's Republic of China.
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Kim YJ, Kim YB, Li X, Choi SR, Park S, Park JS, Lim YP, Park SU. Accumulation of Phenylpropanoids by White, Blue, and Red Light Irradiation and Their Organ-Specific Distribution in Chinese Cabbage (Brassica rapa ssp. pekinensis). J Agric Food Chem 2015; 63:6772-8. [PMID: 26158208 DOI: 10.1021/acs.jafc.5b02086] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
This study investigated optimum light conditions for enhancing phenylpropanoid biosynthesis and the distribution of phenylpropanoids in organs of Chinese cabbage (Brassica rapa ssp. pekinensis). Blue light caused a high accumulation of most phenolic compounds, including p-hydroxybenzoic acid, ferulic acid, quercetin, and kaempferol, at 12 days after irradiation (DAI). This increase was coincident with a noticeable increase in expression levels of BrF3H, BrF3'H, BrFLS, and BrDFR. Red light led to the highest ferulic acid content at 12 DAI and to elevated expression of the corresponding genes during the early stages of irradiation. White light induced the highest accumulation of kaempferol and increased expression of BrPAL and BrDFR at 9 DAI. The phenylpropanoid content analysis in different organs revealed organ-specific accumulation of p-hydroxybenzoic acid, quercetin, and kaempferol. These results demonstrate that blue light is effective at increasing phenylpropanoid biosynthesis in Chinese cabbage, with leaves and flowers representing the most suitable organs for the production of specific phenylpropanoids.
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Affiliation(s)
- Yeon Jeong Kim
- †Department of Crop Science, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 305-754, Korea
| | - Yeon Bok Kim
- §Department of Herbal Crop Research, National Institute of Horticultural and Herbal Science (NIHHS), Rural Development Administration (RDA), Bisanro 92, Eumseong, Chungbuk 369-873, Republic of Korea
| | - Xiaohua Li
- †Department of Crop Science, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 305-754, Korea
| | - Su Ryun Choi
- ‡Department of Horticulture, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 305-764, Korea
| | - Suhyoung Park
- ⊗Department of Horticultural Crop Research, National Institute of Horticultural and Herbal Science (NIHHS), Rural Development Administration (RDA), 475 Imok-dong, Jangan-gu, Suwon 440-706, Korea
| | - Jong Seok Park
- ‡Department of Horticulture, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 305-764, Korea
| | - Yong Pyo Lim
- ‡Department of Horticulture, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 305-764, Korea
| | - Sang Un Park
- †Department of Crop Science, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 305-754, Korea
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Ramchani-Ben Othman K, Cercy C, Amri M, Doly M, Ranchon-Cole I. Dietary supplement enriched in antioxidants and omega-3 protects from progressive light-induced retinal degeneration. PLoS One 2015; 10:e0128395. [PMID: 26042773 PMCID: PMC4455991 DOI: 10.1371/journal.pone.0128395] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Accepted: 04/27/2015] [Indexed: 11/30/2022] Open
Abstract
In the present study, we have evaluated one of the dietary supplements enriched with antioxidants and fish oil used in clinical care for patient with age-related macular degeneration. Rats were orally fed by a gastric canula daily with 0.2 ml of water or dietary supplement until they were sacrificed. After one week of treatment, animals were either sacrificed for lipid analysis in plasma and retina, or used for evaluation of rod-response recovery by electroretinography (ERG) followed by their sacrifice to measure rhodopsin content, or used for progressive light-induced retinal degeneration (PLIRD). For PLIRD, animals were transferred to bright cyclic light for one week. Retinal damage was quantified by ERG, histology and detection of apoptotic nuclei. Animals kept in dim-cyclic-light were processed in parallel. PLIRD induced a thinning of the outer nuclear layer and a reduction of the b-wave amplitude of the ERG in the water group. Retinal structure and function were preserved in supplemented animals. Supplement induced a significant increase in omega-3 fatty acids in plasma by 168% for eicosapentaenoic acid (EPA), 142% for docosapentaenoic acid (DPA) and 19% for docosahexaenoic acid (DHA) and a decrease in the omega-6 fatty acids, DPA by 28%. In the retina, supplement induced significant reduction of linolenic acid by 67% and an increase in EPA and DPA by 80% and 72%, respectively, associated with significant decrease in omega-6 DPA by 42%. Supplement did not affect rhodopsin content or rod-response recovery. The present data indicate that supplement rapidly modified the fatty acid content and induced an accumulation of EPA in the retina without affecting rhodopsin content or recovery. In addition, it protected the retina from oxidative stress induced by light. Therefore, this supplement might be beneficial to slow down progression of certain retinal degeneration.
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Affiliation(s)
- Khaoula Ramchani-Ben Othman
- Université Auvergne, UFR Pharmacie, Laboratoire de Biophysique Neurosensorielle, Inserm UMR 1107, Clermont-Ferrand, France
- Department of Biological Sciences, Tunis El Manar University, Laboratory of Functional Neurophysiology and Pathology, UR/11ES09, El Manar 1, Tunis, Tunisia
| | - Christine Cercy
- Université Auvergne, UFR Pharmacie, Laboratoire de Biophysique Neurosensorielle, Inserm UMR 1107, Clermont-Ferrand, France
| | - Mohamed Amri
- Department of Biological Sciences, Tunis El Manar University, Laboratory of Functional Neurophysiology and Pathology, UR/11ES09, El Manar 1, Tunis, Tunisia
| | - Michel Doly
- Université Auvergne, UFR Pharmacie, Laboratoire de Biophysique Neurosensorielle, Inserm UMR 1107, Clermont-Ferrand, France
| | - Isabelle Ranchon-Cole
- Université Auvergne, UFR Pharmacie, Laboratoire de Biophysique Neurosensorielle, Inserm UMR 1107, Clermont-Ferrand, France
- * E-mail:
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24
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Rasulov B, Talts E, Kännaste A, Niinemets Ü. Bisphosphonate inhibitors reveal a large elasticity of plastidic isoprenoid synthesis pathway in isoprene-emitting hybrid aspen. Plant Physiol 2015; 168:532-48. [PMID: 25926480 PMCID: PMC4453795 DOI: 10.1104/pp.15.00470] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 04/28/2015] [Indexed: 05/05/2023]
Abstract
Recently, a feedback inhibition of the chloroplastic 1-deoxy-D-xylulose 5-phosphate (DXP)/2-C-methyl-D-erythritol 4-phosphate (MEP) pathway of isoprenoid synthesis by end products dimethylallyl diphosphate (DMADP) and isopentenyl diphosphate (IDP) was postulated, but the extent to which DMADP and IDP can build up is not known. We used bisphosphonate inhibitors, alendronate and zoledronate, that inhibit the consumption of DMADP and IDP by prenyltransferases to gain insight into the extent of end product accumulation and possible feedback inhibition in isoprene-emitting hybrid aspen (Populus tremula × Populus tremuloides). A kinetic method based on dark release of isoprene emission at the expense of substrate pools accumulated in light was used to estimate the in vivo pool sizes of DMADP and upstream metabolites. Feeding with fosmidomycin, an inhibitor of DXP reductoisomerase, alone or in combination with bisphosphonates was used to inhibit carbon input into DXP/MEP pathway or both input and output. We observed a major increase in pathway intermediates, 3- to 4-fold, upstream of DMADP in bisphosphonate-inhibited leaves, but the DMADP pool was enhanced much less, 1.3- to 1.5-fold. In combined fosmidomycin/bisphosphonate treatment, pathway intermediates accumulated, reflecting cytosolic flux of intermediates that can be important under strong metabolic pull in physiological conditions. The data suggested that metabolites accumulated upstream of DMADP consist of phosphorylated intermediates and IDP. Slow conversion of the huge pools of intermediates to DMADP was limited by reductive energy supply. These data indicate that the DXP/MEP pathway is extremely elastic, and the presence of a significant pool of phosphorylated intermediates provides an important valve for fine tuning the pathway flux.
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Affiliation(s)
- Bahtijor Rasulov
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, 51014 Tartu, Estonia (B.R., E.T., A.K., Ü.N.);Institute of Technology, University of Tartu, 50411 Tartu, Estonia (B.R.); andEstonian Academy of Sciences, 10130 Tallinn, Estonia (Ü.N.)
| | - Eero Talts
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, 51014 Tartu, Estonia (B.R., E.T., A.K., Ü.N.);Institute of Technology, University of Tartu, 50411 Tartu, Estonia (B.R.); andEstonian Academy of Sciences, 10130 Tallinn, Estonia (Ü.N.)
| | - Astrid Kännaste
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, 51014 Tartu, Estonia (B.R., E.T., A.K., Ü.N.);Institute of Technology, University of Tartu, 50411 Tartu, Estonia (B.R.); andEstonian Academy of Sciences, 10130 Tallinn, Estonia (Ü.N.)
| | - Ülo Niinemets
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, 51014 Tartu, Estonia (B.R., E.T., A.K., Ü.N.);Institute of Technology, University of Tartu, 50411 Tartu, Estonia (B.R.); andEstonian Academy of Sciences, 10130 Tallinn, Estonia (Ü.N.)
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25
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Drummond RSM, Janssen BJ, Luo Z, Oplaat C, Ledger SE, Wohlers MW, Snowden KC. Environmental control of branching in petunia. Plant Physiol 2015; 168:735-51. [PMID: 25911529 PMCID: PMC4453797 DOI: 10.1104/pp.15.00486] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 04/22/2015] [Indexed: 05/20/2023]
Abstract
Plants alter their development in response to changes in their environment. This responsiveness has proven to be a successful evolutionary trait. Here, we tested the hypothesis that two key environmental factors, light and nutrition, are integrated within the axillary bud to promote or suppress the growth of the bud into a branch. Using petunia (Petunia hybrida) as a model for vegetative branching, we manipulated both light quality (as crowding and the red-to-far-red light ratio) and phosphate availability, such that the axillary bud at node 7 varied from deeply dormant to rapidly growing. In conjunction with the phenotypic characterization, we also monitored the state of the strigolactone (SL) pathway by quantifying SL-related gene transcripts. Mutants in the SL pathway inhibit but do not abolish the branching response to these environmental signals, and neither signal is dominant over the other, suggesting that the regulation of branching in response to the environment is complex. We have isolated three new putatively SL-related TCP (for Teosinte branched1, Cycloidia, and Proliferating cell factor) genes from petunia, and have identified that these TCP-type transcription factors may have roles in the SL signaling pathway both before and after the reception of the SL signal at the bud. We show that the abundance of the receptor transcript is regulated by light quality, such that axillary buds growing in added far-red light have greatly increased receptor transcript abundance. This suggests a mechanism whereby the impact of any SL signal reaching an axillary bud is modulated by the responsiveness of these cells to the signal.
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Affiliation(s)
- Revel S M Drummond
- New Zealand Institute for Plant and Food Research, Limited, Sandringham, Auckland 1025, New Zealand
| | - Bart J Janssen
- New Zealand Institute for Plant and Food Research, Limited, Sandringham, Auckland 1025, New Zealand
| | - Zhiwei Luo
- New Zealand Institute for Plant and Food Research, Limited, Sandringham, Auckland 1025, New Zealand
| | - Carla Oplaat
- New Zealand Institute for Plant and Food Research, Limited, Sandringham, Auckland 1025, New Zealand
| | - Susan E Ledger
- New Zealand Institute for Plant and Food Research, Limited, Sandringham, Auckland 1025, New Zealand
| | - Mark W Wohlers
- New Zealand Institute for Plant and Food Research, Limited, Sandringham, Auckland 1025, New Zealand
| | - Kimberley C Snowden
- New Zealand Institute for Plant and Food Research, Limited, Sandringham, Auckland 1025, New Zealand
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26
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Suzuki M, Nakabayashi R, Ogata Y, Sakurai N, Tokimatsu T, Goto S, Suzuki M, Jasinski M, Martinoia E, Otagaki S, Matsumoto S, Saito K, Shiratake K. Multiomics in grape berry skin revealed specific induction of the stilbene synthetic pathway by ultraviolet-C irradiation. Plant Physiol 2015; 168:47-59. [PMID: 25761715 PMCID: PMC4424009 DOI: 10.1104/pp.114.254375] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Accepted: 03/04/2015] [Indexed: 05/08/2023]
Abstract
Grape (Vitis vinifera) accumulates various polyphenolic compounds, which protect against environmental stresses, including ultraviolet-C (UV-C) light and pathogens. In this study, we looked at the transcriptome and metabolome in grape berry skin after UV-C irradiation, which demonstrated the effectiveness of omics approaches to clarify important traits of grape. We performed transcriptome analysis using a genome-wide microarray, which revealed 238 genes up-regulated more than 5-fold by UV-C light. Enrichment analysis of Gene Ontology terms showed that genes encoding stilbene synthase, a key enzyme for resveratrol synthesis, were enriched in the up-regulated genes. We performed metabolome analysis using liquid chromatography-quadrupole time-of-flight mass spectrometry, and 2,012 metabolite peaks, including unidentified peaks, were detected. Principal component analysis using the peaks showed that only one metabolite peak, identified as resveratrol, was highly induced by UV-C light. We updated the metabolic pathway map of grape in the Kyoto Encyclopedia of Genes and Genomes (KEGG) database and in the KaPPA-View 4 KEGG system, then projected the transcriptome and metabolome data on a metabolic pathway map. The map showed specific induction of the resveratrol synthetic pathway by UV-C light. Our results showed that multiomics is a powerful tool to elucidate the accumulation mechanisms of secondary metabolites, and updated systems, such as KEGG and KaPPA-View 4 KEGG for grape, can support such studies.
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Affiliation(s)
- Mami Suzuki
- Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan (Mam.S., S.O., S.M., K.Sh.);National Institute of Vegetables and Tea Science, Taketoyo 470-2351, Japan (Mam.S.);RIKEN Center for Sustainable Resource Science, Tsurumi, Yokohama 230-0045, Japan (R.N., Mak.S., K.Sa.);Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Naka, Sakai 599-8531, Japan (Y.O.);Kazusa DNA Research Institute, Kisarazu 292-0818, Japan (N.S.);Bioinformatics Center, Institute for Chemical Research, Kyoto University, Uji 611-0011, Japan (T.T., S.G.);Database Center for Life Science, Research Organization of Information and Systems, Kashiwa 277-0871, Japan (T.T.);Department of Biochemistry and Biotechnology, Poznań University of Life Sciences, Dojazd 60-637 Poznan, Poland (M.J.);Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 61-704 Poznan, Poland (M.J.);Institute of Plant Biology, University of Zurich, Zurich 8008, Switzerland (E.M.); andGraduate School of Pharmaceutical Sciences, Chiba University, Chuo, Chiba 260-8675, Japan (K.Sa.)
| | - Ryo Nakabayashi
- Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan (Mam.S., S.O., S.M., K.Sh.);National Institute of Vegetables and Tea Science, Taketoyo 470-2351, Japan (Mam.S.);RIKEN Center for Sustainable Resource Science, Tsurumi, Yokohama 230-0045, Japan (R.N., Mak.S., K.Sa.);Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Naka, Sakai 599-8531, Japan (Y.O.);Kazusa DNA Research Institute, Kisarazu 292-0818, Japan (N.S.);Bioinformatics Center, Institute for Chemical Research, Kyoto University, Uji 611-0011, Japan (T.T., S.G.);Database Center for Life Science, Research Organization of Information and Systems, Kashiwa 277-0871, Japan (T.T.);Department of Biochemistry and Biotechnology, Poznań University of Life Sciences, Dojazd 60-637 Poznan, Poland (M.J.);Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 61-704 Poznan, Poland (M.J.);Institute of Plant Biology, University of Zurich, Zurich 8008, Switzerland (E.M.); andGraduate School of Pharmaceutical Sciences, Chiba University, Chuo, Chiba 260-8675, Japan (K.Sa.)
| | - Yoshiyuki Ogata
- Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan (Mam.S., S.O., S.M., K.Sh.);National Institute of Vegetables and Tea Science, Taketoyo 470-2351, Japan (Mam.S.);RIKEN Center for Sustainable Resource Science, Tsurumi, Yokohama 230-0045, Japan (R.N., Mak.S., K.Sa.);Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Naka, Sakai 599-8531, Japan (Y.O.);Kazusa DNA Research Institute, Kisarazu 292-0818, Japan (N.S.);Bioinformatics Center, Institute for Chemical Research, Kyoto University, Uji 611-0011, Japan (T.T., S.G.);Database Center for Life Science, Research Organization of Information and Systems, Kashiwa 277-0871, Japan (T.T.);Department of Biochemistry and Biotechnology, Poznań University of Life Sciences, Dojazd 60-637 Poznan, Poland (M.J.);Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 61-704 Poznan, Poland (M.J.);Institute of Plant Biology, University of Zurich, Zurich 8008, Switzerland (E.M.); andGraduate School of Pharmaceutical Sciences, Chiba University, Chuo, Chiba 260-8675, Japan (K.Sa.)
| | - Nozomu Sakurai
- Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan (Mam.S., S.O., S.M., K.Sh.);National Institute of Vegetables and Tea Science, Taketoyo 470-2351, Japan (Mam.S.);RIKEN Center for Sustainable Resource Science, Tsurumi, Yokohama 230-0045, Japan (R.N., Mak.S., K.Sa.);Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Naka, Sakai 599-8531, Japan (Y.O.);Kazusa DNA Research Institute, Kisarazu 292-0818, Japan (N.S.);Bioinformatics Center, Institute for Chemical Research, Kyoto University, Uji 611-0011, Japan (T.T., S.G.);Database Center for Life Science, Research Organization of Information and Systems, Kashiwa 277-0871, Japan (T.T.);Department of Biochemistry and Biotechnology, Poznań University of Life Sciences, Dojazd 60-637 Poznan, Poland (M.J.);Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 61-704 Poznan, Poland (M.J.);Institute of Plant Biology, University of Zurich, Zurich 8008, Switzerland (E.M.); andGraduate School of Pharmaceutical Sciences, Chiba University, Chuo, Chiba 260-8675, Japan (K.Sa.)
| | - Toshiaki Tokimatsu
- Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan (Mam.S., S.O., S.M., K.Sh.);National Institute of Vegetables and Tea Science, Taketoyo 470-2351, Japan (Mam.S.);RIKEN Center for Sustainable Resource Science, Tsurumi, Yokohama 230-0045, Japan (R.N., Mak.S., K.Sa.);Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Naka, Sakai 599-8531, Japan (Y.O.);Kazusa DNA Research Institute, Kisarazu 292-0818, Japan (N.S.);Bioinformatics Center, Institute for Chemical Research, Kyoto University, Uji 611-0011, Japan (T.T., S.G.);Database Center for Life Science, Research Organization of Information and Systems, Kashiwa 277-0871, Japan (T.T.);Department of Biochemistry and Biotechnology, Poznań University of Life Sciences, Dojazd 60-637 Poznan, Poland (M.J.);Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 61-704 Poznan, Poland (M.J.);Institute of Plant Biology, University of Zurich, Zurich 8008, Switzerland (E.M.); andGraduate School of Pharmaceutical Sciences, Chiba University, Chuo, Chiba 260-8675, Japan (K.Sa.)
| | - Susumu Goto
- Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan (Mam.S., S.O., S.M., K.Sh.);National Institute of Vegetables and Tea Science, Taketoyo 470-2351, Japan (Mam.S.);RIKEN Center for Sustainable Resource Science, Tsurumi, Yokohama 230-0045, Japan (R.N., Mak.S., K.Sa.);Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Naka, Sakai 599-8531, Japan (Y.O.);Kazusa DNA Research Institute, Kisarazu 292-0818, Japan (N.S.);Bioinformatics Center, Institute for Chemical Research, Kyoto University, Uji 611-0011, Japan (T.T., S.G.);Database Center for Life Science, Research Organization of Information and Systems, Kashiwa 277-0871, Japan (T.T.);Department of Biochemistry and Biotechnology, Poznań University of Life Sciences, Dojazd 60-637 Poznan, Poland (M.J.);Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 61-704 Poznan, Poland (M.J.);Institute of Plant Biology, University of Zurich, Zurich 8008, Switzerland (E.M.); andGraduate School of Pharmaceutical Sciences, Chiba University, Chuo, Chiba 260-8675, Japan (K.Sa.)
| | - Makoto Suzuki
- Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan (Mam.S., S.O., S.M., K.Sh.);National Institute of Vegetables and Tea Science, Taketoyo 470-2351, Japan (Mam.S.);RIKEN Center for Sustainable Resource Science, Tsurumi, Yokohama 230-0045, Japan (R.N., Mak.S., K.Sa.);Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Naka, Sakai 599-8531, Japan (Y.O.);Kazusa DNA Research Institute, Kisarazu 292-0818, Japan (N.S.);Bioinformatics Center, Institute for Chemical Research, Kyoto University, Uji 611-0011, Japan (T.T., S.G.);Database Center for Life Science, Research Organization of Information and Systems, Kashiwa 277-0871, Japan (T.T.);Department of Biochemistry and Biotechnology, Poznań University of Life Sciences, Dojazd 60-637 Poznan, Poland (M.J.);Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 61-704 Poznan, Poland (M.J.);Institute of Plant Biology, University of Zurich, Zurich 8008, Switzerland (E.M.); andGraduate School of Pharmaceutical Sciences, Chiba University, Chuo, Chiba 260-8675, Japan (K.Sa.)
| | - Michal Jasinski
- Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan (Mam.S., S.O., S.M., K.Sh.);National Institute of Vegetables and Tea Science, Taketoyo 470-2351, Japan (Mam.S.);RIKEN Center for Sustainable Resource Science, Tsurumi, Yokohama 230-0045, Japan (R.N., Mak.S., K.Sa.);Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Naka, Sakai 599-8531, Japan (Y.O.);Kazusa DNA Research Institute, Kisarazu 292-0818, Japan (N.S.);Bioinformatics Center, Institute for Chemical Research, Kyoto University, Uji 611-0011, Japan (T.T., S.G.);Database Center for Life Science, Research Organization of Information and Systems, Kashiwa 277-0871, Japan (T.T.);Department of Biochemistry and Biotechnology, Poznań University of Life Sciences, Dojazd 60-637 Poznan, Poland (M.J.);Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 61-704 Poznan, Poland (M.J.);Institute of Plant Biology, University of Zurich, Zurich 8008, Switzerland (E.M.); andGraduate School of Pharmaceutical Sciences, Chiba University, Chuo, Chiba 260-8675, Japan (K.Sa.)
| | - Enrico Martinoia
- Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan (Mam.S., S.O., S.M., K.Sh.);National Institute of Vegetables and Tea Science, Taketoyo 470-2351, Japan (Mam.S.);RIKEN Center for Sustainable Resource Science, Tsurumi, Yokohama 230-0045, Japan (R.N., Mak.S., K.Sa.);Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Naka, Sakai 599-8531, Japan (Y.O.);Kazusa DNA Research Institute, Kisarazu 292-0818, Japan (N.S.);Bioinformatics Center, Institute for Chemical Research, Kyoto University, Uji 611-0011, Japan (T.T., S.G.);Database Center for Life Science, Research Organization of Information and Systems, Kashiwa 277-0871, Japan (T.T.);Department of Biochemistry and Biotechnology, Poznań University of Life Sciences, Dojazd 60-637 Poznan, Poland (M.J.);Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 61-704 Poznan, Poland (M.J.);Institute of Plant Biology, University of Zurich, Zurich 8008, Switzerland (E.M.); andGraduate School of Pharmaceutical Sciences, Chiba University, Chuo, Chiba 260-8675, Japan (K.Sa.)
| | - Shungo Otagaki
- Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan (Mam.S., S.O., S.M., K.Sh.);National Institute of Vegetables and Tea Science, Taketoyo 470-2351, Japan (Mam.S.);RIKEN Center for Sustainable Resource Science, Tsurumi, Yokohama 230-0045, Japan (R.N., Mak.S., K.Sa.);Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Naka, Sakai 599-8531, Japan (Y.O.);Kazusa DNA Research Institute, Kisarazu 292-0818, Japan (N.S.);Bioinformatics Center, Institute for Chemical Research, Kyoto University, Uji 611-0011, Japan (T.T., S.G.);Database Center for Life Science, Research Organization of Information and Systems, Kashiwa 277-0871, Japan (T.T.);Department of Biochemistry and Biotechnology, Poznań University of Life Sciences, Dojazd 60-637 Poznan, Poland (M.J.);Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 61-704 Poznan, Poland (M.J.);Institute of Plant Biology, University of Zurich, Zurich 8008, Switzerland (E.M.); andGraduate School of Pharmaceutical Sciences, Chiba University, Chuo, Chiba 260-8675, Japan (K.Sa.)
| | - Shogo Matsumoto
- Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan (Mam.S., S.O., S.M., K.Sh.);National Institute of Vegetables and Tea Science, Taketoyo 470-2351, Japan (Mam.S.);RIKEN Center for Sustainable Resource Science, Tsurumi, Yokohama 230-0045, Japan (R.N., Mak.S., K.Sa.);Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Naka, Sakai 599-8531, Japan (Y.O.);Kazusa DNA Research Institute, Kisarazu 292-0818, Japan (N.S.);Bioinformatics Center, Institute for Chemical Research, Kyoto University, Uji 611-0011, Japan (T.T., S.G.);Database Center for Life Science, Research Organization of Information and Systems, Kashiwa 277-0871, Japan (T.T.);Department of Biochemistry and Biotechnology, Poznań University of Life Sciences, Dojazd 60-637 Poznan, Poland (M.J.);Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 61-704 Poznan, Poland (M.J.);Institute of Plant Biology, University of Zurich, Zurich 8008, Switzerland (E.M.); andGraduate School of Pharmaceutical Sciences, Chiba University, Chuo, Chiba 260-8675, Japan (K.Sa.)
| | - Kazuki Saito
- Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan (Mam.S., S.O., S.M., K.Sh.);National Institute of Vegetables and Tea Science, Taketoyo 470-2351, Japan (Mam.S.);RIKEN Center for Sustainable Resource Science, Tsurumi, Yokohama 230-0045, Japan (R.N., Mak.S., K.Sa.);Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Naka, Sakai 599-8531, Japan (Y.O.);Kazusa DNA Research Institute, Kisarazu 292-0818, Japan (N.S.);Bioinformatics Center, Institute for Chemical Research, Kyoto University, Uji 611-0011, Japan (T.T., S.G.);Database Center for Life Science, Research Organization of Information and Systems, Kashiwa 277-0871, Japan (T.T.);Department of Biochemistry and Biotechnology, Poznań University of Life Sciences, Dojazd 60-637 Poznan, Poland (M.J.);Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 61-704 Poznan, Poland (M.J.);Institute of Plant Biology, University of Zurich, Zurich 8008, Switzerland (E.M.); andGraduate School of Pharmaceutical Sciences, Chiba University, Chuo, Chiba 260-8675, Japan (K.Sa.)
| | - Katsuhiro Shiratake
- Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan (Mam.S., S.O., S.M., K.Sh.);National Institute of Vegetables and Tea Science, Taketoyo 470-2351, Japan (Mam.S.);RIKEN Center for Sustainable Resource Science, Tsurumi, Yokohama 230-0045, Japan (R.N., Mak.S., K.Sa.);Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Naka, Sakai 599-8531, Japan (Y.O.);Kazusa DNA Research Institute, Kisarazu 292-0818, Japan (N.S.);Bioinformatics Center, Institute for Chemical Research, Kyoto University, Uji 611-0011, Japan (T.T., S.G.);Database Center for Life Science, Research Organization of Information and Systems, Kashiwa 277-0871, Japan (T.T.);Department of Biochemistry and Biotechnology, Poznań University of Life Sciences, Dojazd 60-637 Poznan, Poland (M.J.);Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 61-704 Poznan, Poland (M.J.);Institute of Plant Biology, University of Zurich, Zurich 8008, Switzerland (E.M.); andGraduate School of Pharmaceutical Sciences, Chiba University, Chuo, Chiba 260-8675, Japan (K.Sa.)
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Miyazaki S, Nakajima M, Kawaide H. Hormonal diterpenoids derived from ent-kaurenoic acid are involved in the blue-light avoidance response of Physcomitrella patens. Plant Signal Behav 2015; 10:e989046. [PMID: 25751581 PMCID: PMC4622475 DOI: 10.4161/15592324.2014.989046] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Gibberellins (GAs) are diterpenoid hormones that regulate growth and development in flowering plants. The moss Physcomitrella patens has part of the GA biosynthetic pathway from geranylgeranyl diphosphate to ent-kaurenoic acid via ent-kaurene, but it does not produce GA. Disruption of the ent-kaurene synthase gene in P. patens suppressed caulonemal differentiation. Application of ent-kaurene or ent-kaurenoic acid restored differentiation, suggesting that derivative(s) of ent-kaurenoic acid, but not GAs, are endogenous regulator(s) of caulonemal cell differentiation. The protonemal growth of P. patens shows an avoidance response under unilateral blue light. Physiological studies using gene mutants involved in ent-kaurene biosynthesis confirmed that diterpenoid(s) regulate the blue-light response. Here, we discuss the implications of these findings, and provide data for the ent-kaurene oxidase gene-disrupted mutant.
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Affiliation(s)
- Sho Miyazaki
- Department of Applied Biological Chemistry; The University of Tokyo; Tokyo, Japan
| | - Masatoshi Nakajima
- Department of Applied Biological Chemistry; The University of Tokyo; Tokyo, Japan
| | - Hiroshi Kawaide
- Institute of Agriculture; Tokyo University of Agriculture and Technology; Tokyo, Japan
- Correspondence to: Hiroshi Kawaide;
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Thwe AA, Kim YB, Li X, Seo JM, Kim SJ, Suzuki T, Chung SO, Park SU. Effects of light-emitting diodes on expression of phenylpropanoid biosynthetic genes and accumulation of phenylpropanoids in Fagopyrum tataricum sprouts. J Agric Food Chem 2014; 62:4839-45. [PMID: 24793050 DOI: 10.1021/jf501335q] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Buckwheat sprouts are a popular food item in many countries. The effects of light-emitting diodes (LEDs) on sprout growth and development, changes in mRNA transcription, and accumulation of phenylpropanoid compounds were studied in tartary buckwheat 'Hokkai T8' sprouts. The highest transcript levels were observed after 2 days of LED exposure for all genes, especially FtPAL and FtF3'H, which showed higher expression in sprouts grown under blue and white light than in those grown under red light. Catechin content in sprouts grown under red light increased dramatically throughout the 10 day time course. Maximum rutin content (43.37 mg/g dry weight (DW)) was observed in sprouts at 4 days after exposure (DAE) to blue light. Similarly, the highest cyanidin 3-O-rutinoside content (0.85 mg/g DW) was detected at 10 DAE to blue light. On the basis of these results, blue LED light is recommended as a light source for enhancing the content of phenolic compounds in tartary buckwheat sprouts.
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Affiliation(s)
- Aye Aye Thwe
- Department of Crop Science, Chungnam National University , Daejeon 305-754, Korea
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29
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Pandey A, Misra P, Bhambhani S, Bhatia C, Trivedi PK. Expression of Arabidopsis MYB transcription factor, AtMYB111, in tobacco requires light to modulate flavonol content. Sci Rep 2014; 4:5018. [PMID: 24846090 PMCID: PMC4028898 DOI: 10.1038/srep05018] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Accepted: 04/22/2014] [Indexed: 02/04/2023] Open
Abstract
Flavonoids, due to their pharmacological attributes, have recently become target molecules for metabolic engineering in commonly consumed food crops. Strategies including expression of single genes and gene pyramiding have provided only limited success, due principally to the highly branched and complex biosynthetic pathway of the flavonoids. Transcription factors have been demonstrated as an efficient tool for metabolic engineering of this pathway, but often exhibit variation in heterologous systems relative to that in the homologous system. In the present work, Arabidopsis MYB transcription factor, AtMYB111, has been expressed in tobacco to study whether this can enhance flavonoid biosynthesis in heterologous system. The results suggest that AtMYB111 expression in transgenic tobacco enhances expression of genes of the phenylpropanoid pathway leading to an elevated content of flavonols. However, dark incubation of transgenic and wild type (WT) plants down-regulated both the expression of genes as well as flavonoid content as compared to light grown plants. The study concludes that AtMYB111 can be effectively used in heterologous systems, however, light is required for its action in modulating biosynthetic pathway.
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Affiliation(s)
- Ashutosh Pandey
- Council of Scientific and Industrial Research-National Botanical Research Institute, (CSIR-NBRI), Rana Pratap Marg, Lucknow-226 001, INDIA
- Current address: National Agri-Food Biotechnology Institute (NABI), Mohali-160071, Punjab, INDIA
| | - Prashant Misra
- Council of Scientific and Industrial Research-National Botanical Research Institute, (CSIR-NBRI), Rana Pratap Marg, Lucknow-226 001, INDIA
- Current address: CSIR-Indian Institute of Integrative Medicine (IIIM), Canal Road, Jammu-180001, INDIA
| | - Sweta Bhambhani
- Council of Scientific and Industrial Research-National Botanical Research Institute, (CSIR-NBRI), Rana Pratap Marg, Lucknow-226 001, INDIA
| | - Chitra Bhatia
- Council of Scientific and Industrial Research-National Botanical Research Institute, (CSIR-NBRI), Rana Pratap Marg, Lucknow-226 001, INDIA
| | - Prabodh Kumar Trivedi
- Council of Scientific and Industrial Research-National Botanical Research Institute, (CSIR-NBRI), Rana Pratap Marg, Lucknow-226 001, INDIA
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30
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Hong G, Wang J, Zhang Y, Hochstetter D, Zhang S, Pan Y, Shi Y, Xu P, Wang Y. Biosynthesis of catechin components is differentially regulated in dark-treated tea (Camellia sinensis L.). Plant Physiol Biochem 2014; 78:49-52. [PMID: 24632491 DOI: 10.1016/j.plaphy.2014.02.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Accepted: 02/22/2014] [Indexed: 05/18/2023]
Abstract
Tea (Camellia sinensis L.) is a crop with both commercial and medicinal value with remarkably high polyphenol content in the form of catechins. To understand the molecular regulation of catechin biosynthesis in tea, we treated the tea plants with darkness. We used qRT-PCR to validate the expression of genes involved in catechin biosynthesis. It indicated that dark treatment displayed different effects on the genes participating in tea flavonoid (FL) pathway. The early genes of FL biosynthesis pathway, CHSI, F3H and DFR, remained at steady expression levels when treated by darkness. It is noteworthy that the expression level of LAR increased and the level of ANS decreased under dark conditions. The vanillin assay showed that the dark-treated plants contained lower levels of total catechins than those grown under normal conditions. The HPLC analysis further demonstrated the changes in biosynthesis of catechins under these conditions. In accordance with the gene expression pattern, the content of epicatechins (ECs) declined and that of catechins (Cs) was elevated in response to the darkness. Our study uncovered the molecular mechanisms and biochemical changes of shading in tea cultivation.
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Affiliation(s)
- Gaojie Hong
- Department of Tea Science, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Jie Wang
- Department of Tea Science, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Yong Zhang
- Department of Tea Science, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Danielle Hochstetter
- Department of Tea Science, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Shuping Zhang
- Department of Tea Science, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Yue Pan
- Department of Tea Science, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Yunlong Shi
- Department of Tea Science, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Ping Xu
- Department of Tea Science, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China.
| | - Yuefei Wang
- Department of Tea Science, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China; Key Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Chinese Ministry of Agriculture, Hangzhou 310029, China.
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Svyatyna K, Jikumaru Y, Brendel R, Reichelt M, Mithöfer A, Takano M, Kamiya Y, Nick P, Riemann M. Light induces jasmonate-isoleucine conjugation via OsJAR1-dependent and -independent pathways in rice. Plant Cell Environ 2014; 37:827-39. [PMID: 24033451 DOI: 10.1111/pce.12201] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Revised: 08/26/2013] [Accepted: 09/04/2013] [Indexed: 05/22/2023]
Abstract
The bioactive form of jasmonate is the conjugate of the amino acid isoleucine (Ile) with jasmonic acid (JA), which is biosynthesized in a reaction catalysed by the GH3 enzyme JASMONATE RESISTANT 1 (JAR1). We examined the biochemical properties of OsJAR1 and its involvement in photomorphogenesis of rice (Oryza sativa). OsJAR1 has a similar substrate specificities as its orthologue in Arabidopsis. However, osjar1 loss-of-function mutants did not show as severe coleoptile phenotypes as the JA-deficient mutants coleoptile photomorphogenesis 2 (cpm2) and hebiba, which develop long coleoptiles in all light qualities we examined. Analysis of hormonal contents in the young seedling stage revealed that osjar1 mutants are still able to synthesize JA-Ile conjugate in response to blue light, suggesting that a redundantly active enzyme can conjugate JA and Ile in rice seedlings. A good candidate for this enzyme is OsJAR2, which was found to be able to catalyse the conjugation of JA with Ile as well as with some additional amino acids. In contrast, if plants in the vegetative stage were mechanically wounded, the content of JA-Ile was severely reduced in osjar1, demonstrating that OsJAR1 is the most important JA-Ile conjugating enzyme in the wounding response during the vegetative stage.
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Affiliation(s)
- Katharina Svyatyna
- Botanical Institute, Karlsruhe Institute of Technology, 76131, Karlsruhe, Germany
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32
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Reddy SK, Holalu SV, Casal JJ, Finlayson SA. Abscisic acid regulates axillary bud outgrowth responses to the ratio of red to far-red light. Plant Physiol 2013; 163:1047-58. [PMID: 23929720 PMCID: PMC3793024 DOI: 10.1104/pp.113.221895] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Accepted: 08/05/2013] [Indexed: 05/18/2023]
Abstract
Low red light/far-red light ratio (R:FR) serves as an indicator of impending competition and has been demonstrated to suppress branch development. The regulation of Arabidopsis (Arabidopsis thaliana) rosette bud outgrowth by the R:FR and the associated mechanisms were investigated at several levels. Growth under low R:FR suppressed outgrowth of the third from topmost bud (bud n-2) but not that of the topmost bud. Subsequently increasing the R:FR near the time of anthesis promoted bud n-2 outgrowth and reduced topmost bud growth. Buds from specific rosette positions, exhibiting divergent fates to increased R:FR, were harvested 3 h after modifying the R:FR and were used to conduct ATH1 microarray-based transcriptome profiling. Differentially expressed genes showed enrichment of light signaling and hormone-related Gene Ontology terms and promoter motifs, most notably those associated with abscisic acid (ABA). Genes associated with ABA biosynthesis, including the key biosynthetic gene NINE-CIS-EPOXYCAROTENOID DIOXYGENASE3 (NCED3), and with ABA signaling were expressed at higher levels in the responsive bud n-2, and increasing the R:FR decreased their expression only in bud n-2. ABA abundance in responsive buds decreased within 12 h of increasing the R:FR, while indole-3-acetic acid levels did not change. A role for ABA in repressing bud outgrowth from lower positions under low R:FR was demonstrated using the nced3-2 and aba2-1 ABA biosynthesis mutants, which showed enhanced branching and a defective bud n-2 outgrowth response to low R:FR. The results provide evidence that ABA regulates bud outgrowth responses to the R:FR and thus extend the known hormonal pathways associated with the regulation of branching and shade avoidance.
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Fantini E, Falcone G, Frusciante S, Giliberto L, Giuliano G. Dissection of tomato lycopene biosynthesis through virus-induced gene silencing. Plant Physiol 2013; 163:986-98. [PMID: 24014574 PMCID: PMC3793073 DOI: 10.1104/pp.113.224733] [Citation(s) in RCA: 141] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Accepted: 09/04/2013] [Indexed: 05/18/2023]
Abstract
Lycopene biosynthesis in tomato (Solanum lycopersicum) fruits has been proposed to proceed through a poly-cis pathway catalyzed by phytoene synthase (PSY), two desaturases (phytoene desaturase [PDS] and ζ-carotene desaturase [ZDS]), and two cis-trans isomerases (ζ-carotene isomerase [ZISO] and prolycopene isomerase [CrtISO]). The mechanism of action of these enzymes has been studied in Escherichia coli, but a systematic study of their in vivo function is lacking. We studied the function of nine candidate genes (PSY1, PSY2, PSY3, PDS, ZDS, ZISO, CrtISO, CrtISO-Like1, and CrtISO-Like2) using virus-induced gene silencing (VIGS) coupled to high-resolution liquid chromatography coupled with diode array detector and mass spectrometry, which allowed the identification and quantitation of 45 different carotenoid isomers, including linear xanthophylls. The data confirm the confinement of the VIGS signal to the silenced fruits and the similarity of the phenotypes of PSY1- and CrtISO-silenced fruits with those of the yellow flesh and tangerine mutants. Light was able to restore lycopene biosynthesis in ZISO-silenced fruits. Isomeric composition of fruits silenced at different metabolic steps suggested the existence of three functional units, comprising PSY1, PDS/ZISO, and ZDS/CrtISO, and responsible for the synthesis of 15-cis-phytoene, 9,9'-di-cis-ζ-carotene, and all-trans-lycopene, respectively. Silencing of a desaturase (PDS or ZDS) resulted in the induction of the isomerase in the same functional unit (ZISO or CrtISO, respectively). All-trans-ζ-carotene was detectable in nonsilenced fruits, greatly increased in ZDS-silenced ones, and disappeared in CrtISO-Like1-/CrtISO-Like2-silenced ones, suggesting the existence of a metabolic side branch, comprising this compound and initiated by the latter enzymes.
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Zhang ZZ, Che XN, Pan QH, Li XX, Duan CQ. Transcriptional activation of flavan-3-ols biosynthesis in grape berries by UV irradiation depending on developmental stage. Plant Sci 2013; 208:64-74. [PMID: 23683931 DOI: 10.1016/j.plantsci.2013.03.013] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Revised: 03/15/2013] [Accepted: 03/20/2013] [Indexed: 05/02/2023]
Abstract
The accumulation of flavan-3-ols in response to ultraviolet (UV) irradiation was investigated in grape berries with emphasis on the expression of three structural genes (VvANR, VvLAR1 and VvLAR2), and three regulatory genes (VvMYB5a, VvMYB5b and VvMYBPA1), and as well as the contents of flavan-3-ols. UV-A irradiation showed a promoting effect on the transcription of three structural genes at 3-week (flavan-3-ol accumulation period), 7-week (the end of flavan-3-ol accumulation) and 11-week (the beginning of anthocyanin synthesis) periods of berry development. UV-B irradiation also up-regulated all or part of the structural genes, but the activation effect of UV-C irradiation appeared only in the 7-week and 11-week grapes. The developmental stage-dependent activation by the three types of UV was also initiated for three regulatory genes, but the transcriptional up-regulation of the structural genes by UV irradiation was not entirely regulated by these transcription factors. The increase in the content of 2,3-trans-flavan-3-ols or 2,3-cis-flavan-3-ols by UV irradiation paralleled overall with the expression up-regulation of their corresponding structural genes in the 3-week and the 7-week grapes, but not in the 11-week grapes, indicating that the overexpression of structural genes by UV radiation does not translate into a higher content of flavan 3-ols at mature stage.
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Affiliation(s)
- Zhen-Zhen Zhang
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
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Tuan PA, Thwe AA, Kim JK, Kim YB, Lee S, Park SU. Molecular characterisation and the light-dark regulation of carotenoid biosynthesis in sprouts of tartary buckwheat (Fagopyrum tataricum Gaertn.). Food Chem 2013; 141:3803-12. [PMID: 23993552 DOI: 10.1016/j.foodchem.2013.06.085] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2013] [Revised: 06/13/2013] [Accepted: 06/18/2013] [Indexed: 12/15/2022]
Abstract
Seven partial-length cDNAs and 1 full-length cDNA that were involved in carotenoid biosynthesis and 2 partial-length cDNAs that encoded carotenoid cleavage dioxygenases were first isolated and characterised in 2 tartary buckwheat cultivars (Fagopyrum tataricum Gaertn.), Hokkai T8 and Hokkai T10. They were constitutively expressed at high levels in the leaves and flowers, where carotenoids are mostly distributed. During the seed development of tartary buckwheat, an inverse correlation between transcription level of carotenoid cleavage dioxygenase and carotenoid content was observed. The light-grown sprouts exhibited higher levels of expression of carotenoid biosynthetic genes in T10 and carotenoid content in both T8 and T10 compared to the dark-grown sprouts. The predominant carotenoids in tartary buckwheat were lutein and β-carotene, and very abundant amounts of these carotenoids were found in light-grown sprouts. This study might broaden our understanding of the molecular mechanisms involved in carotenoid biosynthesis and indicates targets for increasing the production of carotenoids in tartary buckwheat.
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Affiliation(s)
- Pham Anh Tuan
- Department of Crop Science, Chungnam National University, 99 Daehak-ro, Yuseong-Gu, Daejeon 305-764, South Korea
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Lundquist PK, Poliakov A, Giacomelli L, Friso G, Appel M, McQuinn RP, Krasnoff SB, Rowland E, Ponnala L, Sun Q, van Wijk KJ. Loss of plastoglobule kinases ABC1K1 and ABC1K3 causes conditional degreening, modified prenyl-lipids, and recruitment of the jasmonic acid pathway. Plant Cell 2013; 25:1818-39. [PMID: 23673981 PMCID: PMC3694708 DOI: 10.1105/tpc.113.111120] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 04/02/2013] [Accepted: 04/25/2013] [Indexed: 05/04/2023]
Abstract
Plastoglobules (PGs) are plastid lipid-protein particles. This study examines the function of PG-localized kinases ABC1K1 and ABC1K3 in Arabidopsis thaliana. Several lines of evidence suggested that ABC1K1 and ABC1K3 form a protein complex. Null mutants for both genes (abc1k1 and abc1k3) and the double mutant (k1 k3) displayed rapid chlorosis upon high light stress. Also, k1 k3 showed a slower, but irreversible, senescence-like phenotype during moderate light stress that was phenocopied by drought and nitrogen limitation, but not cold stress. This senescence-like phenotype involved degradation of the photosystem II core and upregulation of chlorophyll degradation. The senescence-like phenotype was independent of the EXECUTER pathway that mediates genetically controlled cell death from the chloroplast and correlated with increased levels of the singlet oxygen-derived carotenoid β-cyclocitral, a retrograde plastid signal. Total PG volume increased during light stress in wild type and k1 k3 plants, but with different size distributions. Isolated PGs from k1 k3 showed a modified prenyl-lipid composition, suggesting reduced activity of PG-localized tocopherol cyclase (VTE1), and was consistent with loss of carotenoid cleavage dioxygenase 4. Plastid jasmonate biosynthesis enzymes were recruited to the k1 k3 PGs but not wild-type PGs, while pheophytinase, which is involved in chlorophyll degradation, was induced in k1 k3 and not wild-type plants and was localized to PGs. Thus, the ABC1K1/3 complex contributes to PG function in prenyl-lipid metabolism, stress response, and thylakoid remodeling.
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Affiliation(s)
| | - Anton Poliakov
- Department of Plant Biology, Cornell University, Ithaca, New York 14853
| | - Lisa Giacomelli
- Department of Plant Biology, Cornell University, Ithaca, New York 14853
| | - Giulia Friso
- Department of Plant Biology, Cornell University, Ithaca, New York 14853
| | - Mason Appel
- Department of Plant Biology, Cornell University, Ithaca, New York 14853
| | - Ryan P. McQuinn
- Boyce Thompson Institute for Plant Science Research, Ithaca, New York 14853
| | - Stuart B. Krasnoff
- U.S. Department of Agriculture–Agricultural Research Service, Robert W. Holley Center for Agriculture and Health, Ithaca, New York 14853
| | - Elden Rowland
- Department of Plant Biology, Cornell University, Ithaca, New York 14853
| | - Lalit Ponnala
- Computational Biology Service Unit, Cornell University, Ithaca, New York 14853
| | - Qi Sun
- Computational Biology Service Unit, Cornell University, Ithaca, New York 14853
| | - Klaas J. van Wijk
- Department of Plant Biology, Cornell University, Ithaca, New York 14853
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Ramel F, Ksas B, Akkari E, Mialoundama AS, Monnet F, Krieger-Liszkay A, Ravanat JL, Mueller MJ, Bouvier F, Havaux M. Light-induced acclimation of the Arabidopsis chlorina1 mutant to singlet oxygen. Plant Cell 2013; 25:1445-62. [PMID: 23590883 PMCID: PMC3663279 DOI: 10.1105/tpc.113.109827] [Citation(s) in RCA: 114] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Revised: 03/11/2013] [Accepted: 03/24/2013] [Indexed: 05/18/2023]
Abstract
Singlet oxygen (¹O₂) is a reactive oxygen species that can function as a stress signal in plant leaves leading to programmed cell death. In microalgae, ¹O₂-induced transcriptomic changes result in acclimation to ¹O₂. Here, using a chlorophyll b-less Arabidopsis thaliana mutant (chlorina1 [ch1]), we show that this phenomenon can also occur in vascular plants. The ch1 mutant is highly photosensitive due to a selective increase in the release of ¹O₂ by photosystem II. Under photooxidative stress conditions, the gene expression profile of ch1 mutant leaves very much resembled the gene responses to ¹O₂ reported in the Arabidopsis mutant flu. Preexposure of ch1 plants to moderately elevated light intensities eliminated photooxidative damage without suppressing ¹O₂ formation, indicating acclimation to ¹O₂. Substantial differences in gene expression were observed between acclimation and high-light stress: A number of transcription factors were selectively induced by acclimation, and contrasting effects were observed for the jasmonate pathway. Jasmonate biosynthesis was strongly induced in ch1 mutant plants under high-light stress and was noticeably repressed under acclimation conditions, suggesting the involvement of this hormone in ¹O₂-induced cell death. This was confirmed by the decreased tolerance to photooxidative damage of jasmonate-treated ch1 plants and by the increased tolerance of the jasmonate-deficient mutant delayed-dehiscence2.
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Affiliation(s)
- Fanny Ramel
- Commissariat à l’Energie Atomique et aux Energies Alternatives, Direction des Sciences du Vivant, Institut de Biologie Environnementale et de Biotechnologies, Laboratoire d’Ecophysiologie Moléculaire des Plantes, F-13108 Saint-Paul-lez-Durance, France
- Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7265 Biologie Végétale et Microbiologie Environnementales, F-13108 Saint-Paul-lez-Durance, France
- Aix-Marseille Université, F-13108 Saint-Paul-lez-Durance, France
| | - Brigitte Ksas
- Commissariat à l’Energie Atomique et aux Energies Alternatives, Direction des Sciences du Vivant, Institut de Biologie Environnementale et de Biotechnologies, Laboratoire d’Ecophysiologie Moléculaire des Plantes, F-13108 Saint-Paul-lez-Durance, France
- Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7265 Biologie Végétale et Microbiologie Environnementales, F-13108 Saint-Paul-lez-Durance, France
- Aix-Marseille Université, F-13108 Saint-Paul-lez-Durance, France
| | - Elsy Akkari
- Commissariat à l’Energie Atomique et aux Energies Alternatives, Direction des Sciences du Vivant, Institut de Biologie Environnementale et de Biotechnologies, Laboratoire d’Ecophysiologie Moléculaire des Plantes, F-13108 Saint-Paul-lez-Durance, France
- Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7265 Biologie Végétale et Microbiologie Environnementales, F-13108 Saint-Paul-lez-Durance, France
- Aix-Marseille Université, F-13108 Saint-Paul-lez-Durance, France
| | - Alexis S. Mialoundama
- Institut de Biologie Moléculaire des Plantes du Centre National de la Recherche Scientifique, Université de Strasbourg, F-67084 Strasbourg cedex, France
| | - Fabien Monnet
- Commissariat à l’Energie Atomique et aux Energies Alternatives, Direction des Sciences du Vivant, Institut de Biologie Environnementale et de Biotechnologies, Laboratoire d’Ecophysiologie Moléculaire des Plantes, F-13108 Saint-Paul-lez-Durance, France
- Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7265 Biologie Végétale et Microbiologie Environnementales, F-13108 Saint-Paul-lez-Durance, France
- Aix-Marseille Université, F-13108 Saint-Paul-lez-Durance, France
- Université d’Avignon et des Pays de Vaucluse, 84000 Avignon, France
| | - Anja Krieger-Liszkay
- Commissariat à l’Energie Atomique et aux Energies Alternatives, Institut de Biologie et de Technologies de Saclay, Centre National de la Recherche Scientifique, Unité de Recherche Associée 2096, Service de Bioénergétique, Biologie Structurale et Mécanisme, F-91191 Gif-sur-Yvette cedex, France
| | - Jean-Luc Ravanat
- Laboratoire Lésions des Acides Nucléiques, Institut Nanosciences et Cryogénie, Service de Chimie Inorganique et Biologique, Unité Mixte de Recherche E3 Commissariat à l’Energie Atomique et aux Energies Alternatives–Université Joseph Fourier, F-38054 Grenoble cedex 9, France
| | - Martin J. Mueller
- Julius-von-Sachs-Institute for Biosciences, Pharmaceutical Biology, Biocenter, University of Wuerzburg, D-97082 Wuerzburg, Germany
| | - Florence Bouvier
- Institut de Biologie Moléculaire des Plantes du Centre National de la Recherche Scientifique, Université de Strasbourg, F-67084 Strasbourg cedex, France
| | - Michel Havaux
- Commissariat à l’Energie Atomique et aux Energies Alternatives, Direction des Sciences du Vivant, Institut de Biologie Environnementale et de Biotechnologies, Laboratoire d’Ecophysiologie Moléculaire des Plantes, F-13108 Saint-Paul-lez-Durance, France
- Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7265 Biologie Végétale et Microbiologie Environnementales, F-13108 Saint-Paul-lez-Durance, France
- Aix-Marseille Université, F-13108 Saint-Paul-lez-Durance, France
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CALIANDRO ROSANNA, NAGEL KERSTINA, KASTENHOLZ BERND, BASSI ROBERTO, LI ZHIRONG, NIYOGI KRISHNAK, POGSON BARRYJ, SCHURR ULRICH, MATSUBARA SHIZUE. Effects of altered α- and β-branch carotenoid biosynthesis on photoprotection and whole-plant acclimation of Arabidopsis to photo-oxidative stress. Plant Cell Environ 2013; 36:438-53. [PMID: 22860767 PMCID: PMC3640260 DOI: 10.1111/j.1365-3040.2012.02586.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Accepted: 07/16/2012] [Indexed: 05/07/2023]
Abstract
Functions of α- and β-branch carotenoids in whole-plant acclimation to photo-oxidative stress were studied in Arabidopsis thaliana wild-type (wt) and carotenoid mutants, lutein deficient (lut2, lut5), non-photochemical quenching1 (npq1) and suppressor of zeaxanthin-less1 (szl1) npq1 double mutant. Photo-oxidative stress was applied by exposing plants to sunflecks. The sunflecks caused reduction of chlorophyll content in all plants, but more severely in those having high α- to β-branch carotenoid composition (α/β-ratio) (lut5, szl1npq1). While this did not alter carotenoid composition in wt or lut2, which accumulates only β-branch carotenoids, increased xanthophyll levels were found in the mutants with high α/β-ratios (lut5, szl1npq1) or without xanthophyll-cycle operation (npq1, szl1npq1). The PsbS protein content increased in all sunfleck plants but lut2. These changes were accompanied by no change (npq1, szl1npq1) or enhanced capacity (wt, lut5) of NPQ. Leaf mass per area increased in lut2, but decreased in wt and lut5 that showed increased NPQ. The sunflecks decelerated primary root growth in wt and npq1 having normal α/β-ratios, but suppressed lateral root formation in lut5 and szl1npq1 having high α/β-ratios. The results highlight the importance of proper regulation of the α- and β-branch carotenoid pathways for whole-plant acclimation, not only leaf photoprotection, under photo-oxidative stress.
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Affiliation(s)
- ROSANNA CALIANDRO
- IBG-2: Pflanzenwissenschaften, Forschungszentrum Jülich52425 Jülich, Germany
| | - KERSTIN A NAGEL
- IBG-2: Pflanzenwissenschaften, Forschungszentrum Jülich52425 Jülich, Germany
| | - BERND KASTENHOLZ
- IBG-2: Pflanzenwissenschaften, Forschungszentrum Jülich52425 Jülich, Germany
| | - ROBERTO BASSI
- IBG-2: Pflanzenwissenschaften, Forschungszentrum Jülich52425 Jülich, Germany
- Dipartimento di Biotecnologie, Università degli Studi di Verona37134 Verona, Italy
| | - ZHIRONG LI
- Department of Plant and Microbial Biology, Howard Hughes Medical InstituteUniversity of California
- Physical Biosciences Division, Lawrence Berkeley National LaboratoryBerkeley, CA 94720-3102, USA
| | - KRISHNA K NIYOGI
- Department of Plant and Microbial Biology, Howard Hughes Medical InstituteUniversity of California
- Physical Biosciences Division, Lawrence Berkeley National LaboratoryBerkeley, CA 94720-3102, USA
| | - BARRY J POGSON
- Australian Research Council Centre of Excellence in Plant Energy Biology, Research School of Biology, Australian National UniversityCanberra, ACT 0200, Australia
| | - ULRICH SCHURR
- IBG-2: Pflanzenwissenschaften, Forschungszentrum Jülich52425 Jülich, Germany
| | - SHIZUE MATSUBARA
- IBG-2: Pflanzenwissenschaften, Forschungszentrum Jülich52425 Jülich, Germany
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Huang G, Wang L, Zhou Q. Lanthanum (III) regulates the nitrogen assimilation in soybean seedlings under ultraviolet-B radiation. Biol Trace Elem Res 2013; 151:105-12. [PMID: 23090712 DOI: 10.1007/s12011-012-9528-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Accepted: 10/11/2012] [Indexed: 01/03/2023]
Abstract
Ultraviolet-B (UV-B, 280-320 nm) radiation has seriously affected the growth of plants. Finding the technology/method to alleviate the damage of UV-B radiation has become a frontal topic in the field of environmental science. The pretreatment with rare earth elements (REEs) is an effective method, but the regulation mechanism of REEs is unknown. Here, the regulation effects of lanthanum (La(III)) on nitrogen assimilation in soybean seedlings (Glycine max L.) under ultraviolet-B radiation were investigated to elucidate the regulation mechanism of REEs on plants under UV-B radiation. UV-B radiation led to the inhibition in the activities of the key enzymes (nitrate reductase, glutamine synthetase, glutamate synthase) in the nitrogen assimilation, the decrease in the contents of nitrate and soluble proteins, as well as the increase in the content of amino acid in soybean seedlings. The change degree of UV-B radiation at the high level (0.45 W m(-2)) was higher than that of UV-B radiation at the low level (0.15 W m(-2)). The pretreatment with 20 mg L(-1) La(III) could alleviate the effects of UV-B radiation on the activities of nitrate reductase, glutamine synthetase, glutamate synthase, and glutamate dehydrogenase, promoting amino acid conversion and protein synthesis in soybean seedlings. The regulation effect of La(III) under UV-B radiation at the low level was better than that of UV-B radiation at the high level. The results indicated that the pretreatment with 20 mg L(-1) La(III) could alleviate the inhibition of UV-B radiation on nitrogen assimilation in soybean seedlings.
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Affiliation(s)
- Guangrong Huang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
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Kopečná J, Komenda J, Bučinská L, Sobotka R. Long-term acclimation of the cyanobacterium Synechocystis sp. PCC 6803 to high light is accompanied by an enhanced production of chlorophyll that is preferentially channeled to trimeric photosystem I. Plant Physiol 2012; 160:2239-50. [PMID: 23037506 PMCID: PMC3510144 DOI: 10.1104/pp.112.207274] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Accepted: 10/02/2012] [Indexed: 05/03/2023]
Abstract
Cyanobacteria acclimate to high-light conditions by adjusting photosystem stoichiometry through a decrease of photosystem I (PSI) abundance in thylakoid membranes. As PSI complexes bind the majority of chlorophyll (Chl) in cyanobacterial cells, it is accepted that the mechanism controlling PSI level/synthesis is tightly associated with the Chl biosynthetic pathway. However, how Chl is distributed to photosystems under different light conditions remains unknown. Using radioactive labeling by (35)S and by (14)C combined with native/two-dimensional electrophoresis, we assessed the synthesis and accumulation of photosynthetic complexes in parallel with the synthesis of Chl in Synechocystis sp. PCC 6803 cells acclimated to different light intensities. Although cells acclimated to higher irradiances (150 and 300 μE m(-2)s(-1)) exhibited markedly reduced PSI content when compared with cells grown at lower irradiances (10 and 40 μE m(-2) s(-1)), they grew much faster and synthesized significantly more Chl, as well as both photosystems. Interestingly, even under high irradiance, almost all labeled de novo Chl was localized in the trimeric PSI, whereas only a weak Chl labeling in photosystem II (PSII) was accompanied by the intensive (35)S protein labeling, which was much stronger than in PSI. These results suggest that PSII subunits are mostly synthesized using recycled Chl molecules previously released during PSII repair-driven protein degradation. In contrast, most of the fresh Chl is utilized for synthesis of PSI complexes likely to maintain a constant level of PSI during cell proliferation.
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Affiliation(s)
- Jana Kopečná
- Institute of Microbiology, Department of Phototrophic Microorganisms, Academy of Sciences, 37981 Trebon, Czech Republic; and Faculty of Science, University of South Bohemia, 370 05 Ceske Budejovice, Czech Republic
| | - Josef Komenda
- Institute of Microbiology, Department of Phototrophic Microorganisms, Academy of Sciences, 37981 Trebon, Czech Republic; and Faculty of Science, University of South Bohemia, 370 05 Ceske Budejovice, Czech Republic
| | - Lenka Bučinská
- Institute of Microbiology, Department of Phototrophic Microorganisms, Academy of Sciences, 37981 Trebon, Czech Republic; and Faculty of Science, University of South Bohemia, 370 05 Ceske Budejovice, Czech Republic
| | - Roman Sobotka
- Institute of Microbiology, Department of Phototrophic Microorganisms, Academy of Sciences, 37981 Trebon, Czech Republic; and Faculty of Science, University of South Bohemia, 370 05 Ceske Budejovice, Czech Republic
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Xie Y, Xu D, Cui W, Shen W. Mutation of Arabidopsis HY1 causes UV-C hypersensitivity by impairing carotenoid and flavonoid biosynthesis and the down-regulation of antioxidant defence. J Exp Bot 2012; 63:3869-83. [PMID: 22419743 PMCID: PMC3388838 DOI: 10.1093/jxb/ers078] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2011] [Revised: 02/10/2012] [Accepted: 02/20/2012] [Indexed: 05/18/2023]
Abstract
Previous pharmacological results confirmed that haem oxygenase-1 (HO-1) is involved in protection of cells against ultraviolet (UV)-induced oxidative damage in soybean [Glycine max (L.) Merr.] seedlings, but there remains a lack of genetic evidence. In this study, the link between Arabidopsis thaliana HO-1 (HY1) and UV-C tolerance was investigated at the genetic and molecular levels. The maximum inducible expression of HY1 in wild-type Arabidopsis was observed following UV-C irradiation. UV-C sensitivity was not observed in ho2, ho3, and ho4 single and double mutants. However, the HY1 mutant exhibited UV-C hypersensitivity, consistent with the observed decreases in chlorophyll content, and carotenoid and flavonoid metabolism, as well as the down-regulation of antioxidant defences, thereby resulting in severe oxidative damage. The addition of the carbon monoxide donor carbon monoxide-releasing molecule-2 (CORM-2), in particular, and bilirubin (BR), two catalytic by-products of HY1, partially rescued the UV-C hypersensitivity, and other responses appeared in the hy1 mutant. Transcription factors involved in the synthesis of flavonoid or UV responses were induced by UV-C, but reduced in the hy1 mutant. Overall, the findings showed that mutation of HY1 triggered UV-C hypersensitivity, by impairing carotenoid and flavonoid synthesis and antioxidant defences.
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Affiliation(s)
| | | | | | - Wenbiao Shen
- To whom correspondence should be addressed. E-mail:
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Abstract
Ubiquitin-26S proteasome system (UPS) has been shown to play central roles in light and hormone-regulated plant growth and development. Previously, we have shown that MAX2, an F-box protein, positively regulates facets of photomorphogenic development in response to light. However, how MAX2 controls these responses is still unknown. Here, we show that MAX2 oppositely regulates GA and ABA biosynthesis to optimize seed germination in response to light. Dose-response curves showed that max2 seeds are hyposensitive to GA and hypersensitive to ABA in seed germination responses. RT-PCR assays demonstrated that the expression of GA biosynthetic genes is down-regulated, while the expression of GA catabolic genes is up-regulated in the max2 seeds compared to wild-type. Interestingly, expression of both ABA biosynthetic and catabolic genes is up-regulated in the max2 seeds compared to wild-type. Treatment with an auxin transport inhibitor, NPA, showed that increased auxin transport in max2 seedlings contributes to the long hypocotyl phenotype under light. Moreover, light-signaling phenotypes are restricted to max2, as the biosynthetic mutants in the strigolactone pathway, max1, max3, and max4, did not display any defects in seed germination and seedling de-etiolation compared to wild-type. Taken together, these data suggest that MAX2 modulates multiple hormone pathways to affect photomorphogenesis.
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Affiliation(s)
- Hui Shen
- Section of Molecular Cell and Developmental Biology and the Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX 78712, USA
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Cao L, Bryant DA, Schepmoes AA, Vogl K, Smith RD, Lipton MS, Callister SJ. Comparison of Chloroflexus aurantiacus strain J-10-fl proteomes of cells grown chemoheterotrophically and photoheterotrophically. Photosynth Res 2012; 110:153-168. [PMID: 22249883 DOI: 10.1007/s11120-011-9711-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2011] [Accepted: 11/25/2011] [Indexed: 05/31/2023]
Abstract
Chloroflexus aurantiacus J-10-fl is a thermophilic green bacterium, a filamentous anoxygenic phototroph, and the model organism of the phylum Chloroflexi. We applied high-throughput, liquid chromatography-mass spectrometry in a global quantitative proteomics investigation of C. aurantiacus cells grown under oxic (chemoorganoheterotrophically) and anoxic (photoorganoheterotrophically) redox states. Our global analysis identified 13,524 high-confidence peptides that matched to 1,286 annotated proteins, 242 of which were either uniquely identified or significantly increased in abundance under photoheterotrophic culture condition. Fifty-four of the 242 proteins are previously characterized photosynthesis-related proteins, including chlorosome proteins, proteins involved in the bacteriochlorophyll biosynthesis, 3-hydroxypropionate (3-OHP) CO(2) fixation pathway, and components of electron transport chains. The remaining 188 proteins have not previously been reported. Of these, five proteins were found to be encoded by genes from a novel operon and observed only in photoheterotrophically grown cells. These proteins candidates may prove useful in further deciphering the phototrophic physiology of C. aurantiacus and other filamentous anoxygenic phototrophs.
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Affiliation(s)
- Li Cao
- Biological Separations and Mass Spectrometry, Pacific Northwest National Laboratory, Richland, WA 99352, USA
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Abstract
The orange pigmentation of the fungus Neurospora crassa is due to the accumulation of the xanthophyll neurosporaxanthin and precursor carotenoids. Two key reactions in the synthesis of these pigments, the formation of phytoene from geranylgeranyl pyrophosphate and the introduction of β cycles in desaturated carotenoid products, are catalyzed by two domains of a bifunctional protein, encoded by the gene al-2. We have determined the sequence of nine al-2 mutant alleles and analyzed the carotenoid content in the corresponding strains. One of the mutants is reddish and it is mutated in the cyclase domain of the protein, and the remaining eight mutants are albino and harbor different mutations on the phytoene synthase (PS) domain. Some of the mutations are expected to produce truncated polypeptides. A strain lacking most of the PS domain contained trace amounts of a carotenoid-like pigment, tentatively identified as the squalene desaturation product diapolycopene. In support, trace amounts of this compound were also found in a knock-out mutant for gene al-2, but not in that for gene al-1, coding for the carotene desaturase. The cyclase activity of the AL-2 enzyme from two albino mutants was investigated by heterologous expression in an appropriately engineered E. coli strain. One of the AL-2 enzymes, predictably with only 20% of the PS domain, showed full cyclase activity, suggesting functional independence of both domains. However, the second mutant showed no cyclase activity, indicating that some alterations in the phytoene synthase segment affect the cyclase domain. Expression experiments showed a diminished photoinduction of al-2 transcripts in the al-2 mutants compared to the wild type strain, suggesting a synergic effect between reduced expression and impaired enzymatic activities in the generation of their albino phenotypes.
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Affiliation(s)
- Violeta Díaz-Sánchez
- Department of Genetics, Faculty of Biology, University of Seville, Seville, Spain
| | - Alejandro F. Estrada
- Department of Genetics, Faculty of Biology, University of Seville, Seville, Spain
| | - Danika Trautmann
- Faculty of Biology, Albert-Ludwigs University of Freiburg, Freiburg, Germany
| | - M. Carmen Limón
- Department of Genetics, Faculty of Biology, University of Seville, Seville, Spain
| | - Salim Al-Babili
- Faculty of Biology, Albert-Ludwigs University of Freiburg, Freiburg, Germany
| | - Javier Avalos
- Department of Genetics, Faculty of Biology, University of Seville, Seville, Spain
- * E-mail:
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Xu RY, Nan P, Yang Y, Pan H, Zhou T, Chen J. Ultraviolet irradiation induces accumulation of isoflavonoids and transcription of genes of enzymes involved in the calycosin-7-O-β-d-glucoside pathway in Astragalus membranaceus Bge. var. mongholicus (Bge.) Hsiao. Physiol Plant 2011; 142:265-273. [PMID: 21438882 DOI: 10.1111/j.1399-3054.2011.01474.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Isoflavonoids are a group of phenolic secondary metabolites found almost exclusively in leguminous plants. Formononetin, calycosin and calycosin-7-O-β-d-glucoside (CG) are isoflavonoid products in the CG pathway. Accumulation of the three isoflavonoids plus daidzein and expression of six genes of enzymes involved in the CG pathway were studied in Astragalus membranaceus Bge. var. mongholicus (Bge.) Hsiao with ultraviolet (UV) irradiation. Our results showed that (1) main isoflavonoids in roots, stems and leaves were CG, daidzein and calycosin, respectively; they accumulated significantly under the induction of UV irradiation during 8 days but their content declined later; (2) expression of six genes of enzymes involved in the CG pathway was inhibited slightly at early stage but the expression was increased greatly afterward; (3) chalcone synthase, chalcone reductase and chalcone isomerase were expressed to their individual maximum level within shorter hours than were cinnamate 4-hydroxylase, isoflavone synthase (IFS) and isoflavone 3'-hydroxylase and (4) more calycosin but less daidzein accumulated in leaves. IFS was highly expressed in leaves, which might lead to high accumulation of the common precursor of daidzein and 2,7-dihydroxy-4'-O-methoxy-isoflavanone, the latter of which would be converted to formononetin, calycosin and CG via a series of reactions. Little daidzein accumulated in leaves, which suggested that rather than be converted to daidzein, the 2,7,4'-trihydroxyisoflavanone was probably more easily caught by 2-hydroxyisoflavanone 4'-O-methyltransferase and hence provided more precursors for formononetin. The findings were discussed in terms of the influence of UV irradiation in the accumulation of isoflavonoids.
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Affiliation(s)
- Rong-Yan Xu
- Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Institute of Biodiversity Science, Fudan University, Shanghai, China
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Tossi V, Amenta M, Lamattina L, Cassia R. Nitric oxide enhances plant ultraviolet-B protection up-regulating gene expression of the phenylpropanoid biosynthetic pathway. Plant Cell Environ 2011; 34:909-921. [PMID: 21332509 DOI: 10.1111/j.1365-3040.2011.02289.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The link between ultraviolet (UV)-B, nitric oxide (NO) and phenylpropanoid biosynthetic pathway (PPBP) was studied in maize and Arabidopsis. The transcription factor (TF) ZmP regulates PPBP in maize. A genetic approach using P-rr (ZmP+) and P-ww (ZmP⁻) maize lines demonstrate that: (1) NO protects P-rr leaves but not P-ww from UV-B-induced reactive oxygen species (ROS) and cell damage; (2) NO increases flavonoid and anthocyanin content and prevents chlorophyll loss in P-rr but not in P-ww and (3) the NO scavenger 2-(4-carboxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide (cPTIO) blocks the UV-B-induced expression of ZmP and their targets CHS and CHI suggesting that NO plays a key role in the UV-B-regulated PPBP. Involvement of endogenous NO was studied in Arabidopsis nitric oxide dioxygenase (NOD) plants that express a NO dioxygenase gene under the control of a dexamethasone (DEX)-inducible promoter. Expression of HY5 and MYB12, TFs involved in PPBP regulation, was induced by UV-B, reduced by DEX in NOD plants and recovered by subsequent NO treatment. C4H regulates synapate esters synthesis and is UV-B-induced in a NO-independent pathway. Data indicate that UV-B perception increases NO concentration, which protects plant against UV-B by two ways: (1) scavenging ROS; and (2) up-regulating the expression of HY5, MYB12 and ZmP, resulting in the PPBP activation.
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Affiliation(s)
- Vanesa Tossi
- Instituto de Investigaciones Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, CC1245 (7600) Mar del Plata, Argentina
| | - Melina Amenta
- Instituto de Investigaciones Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, CC1245 (7600) Mar del Plata, Argentina
| | - Lorenzo Lamattina
- Instituto de Investigaciones Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, CC1245 (7600) Mar del Plata, Argentina
| | - Raúl Cassia
- Instituto de Investigaciones Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, CC1245 (7600) Mar del Plata, Argentina
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Ouyang M, Ma J, Zou M, Guo J, Wang L, Lu C, Zhang L. The photosensitive phs1 mutant is impaired in the riboflavin biogenesis pathway. J Plant Physiol 2010; 167:1466-1476. [PMID: 20580123 DOI: 10.1016/j.jplph.2010.05.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2010] [Revised: 05/17/2010] [Accepted: 05/19/2010] [Indexed: 05/27/2023]
Abstract
A photosensitive (phs1) mutant of Arabidopsis thaliana was isolated and characterized. The PHS1 gene was cloned using a map-based approach. The gene was found to encode a protein containing a deaminase-reductase domain that is involved in the riboflavin pathway. The phenotype and growth of the phs1 mutant were comparable to that of the wild-type when the plants were grown under low light conditions. When the light intensity was increased, the mutant was characterized by stunted growth and bleached leaves as well as a decrease in FNR activity. The NADPH levels declined, whereas the NADP(+) levels increased, leading to a decrease in the NADPH/NADP(+) ratio. The mutant suffered from severe photooxidative damage with an increase in antioxidant enzyme activity and a drastic reduction in the levels of chlorophyll and photosynthetic proteins. Supplementing the mutant with exogenous FAD rescued the photosensitive phenotype, even under increasing light intensity. The riboflavin pathway therefore plays an important role in protecting plants from photooxidative damage.
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Affiliation(s)
- Min Ouyang
- Photosynthesis Research Center, Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
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