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Li Y, Grotewold E, Dudareva N. Enough is enough: feedback control of specialized metabolism. TRENDS IN PLANT SCIENCE 2024; 29:514-523. [PMID: 37625949 DOI: 10.1016/j.tplants.2023.07.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 07/24/2023] [Accepted: 07/27/2023] [Indexed: 08/27/2023]
Abstract
Recent advances in our understanding of plant metabolism have highlighted the significance of specialized metabolites in the regulation of gene expression associated with biosynthetic networks. This opinion article focuses on the molecular mechanisms of small-molecule-mediated feedback regulation at the transcriptional level and its potential modes of action, including metabolite signal perception, the nature of the sensor, and the signaling transduction mechanisms leading to transcriptional and post-transcriptional regulation, based on evidence available from plants and other kingdoms of life. We also discuss the challenges associated with identifying the occurrences, effects, and localization of small molecule-protein interactions. Further understanding of small-molecule-controlled metabolic fluxes will enable rational design of transcriptional regulation systems in metabolic engineering to produce high-value specialized metabolites.
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Affiliation(s)
- Ying Li
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN 47907, USA; Purdue Center for Plant Biology, Purdue University, West Lafayette, IN 47907, USA.
| | - Erich Grotewold
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA
| | - Natalia Dudareva
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN 47907, USA; Purdue Center for Plant Biology, Purdue University, West Lafayette, IN 47907, USA; Department of Biochemistry, Purdue University, West Lafayette, IN 47907, USA
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2
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Gasperini D, Howe GA. Phytohormones in a universe of regulatory metabolites: lessons from jasmonate. PLANT PHYSIOLOGY 2024; 195:135-154. [PMID: 38290050 PMCID: PMC11060663 DOI: 10.1093/plphys/kiae045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 01/05/2024] [Accepted: 01/05/2024] [Indexed: 02/01/2024]
Abstract
Small-molecule phytohormones exert control over plant growth, development, and stress responses by coordinating the patterns of gene expression within and between cells. Increasing evidence indicates that currently recognized plant hormones are part of a larger group of regulatory metabolites that have acquired signaling properties during the evolution of land plants. This rich assortment of chemical signals reflects the tremendous diversity of plant secondary metabolism, which offers evolutionary solutions to the daunting challenges of sessility and other unique aspects of plant biology. A major gap in our current understanding of plant regulatory metabolites is the lack of insight into the direct targets of these compounds. Here, we illustrate the blurred distinction between classical phytohormones and other bioactive metabolites by highlighting the major scientific advances that transformed the view of jasmonate from an interesting floral scent to a potent transcriptional regulator. Lessons from jasmonate research generally apply to other phytohormones and thus may help provide a broad understanding of regulatory metabolite-protein interactions. In providing a framework that links small-molecule diversity to transcriptional plasticity, we hope to stimulate future research to explore the evolution, functions, and mechanisms of perception of a broad range of plant regulatory metabolites.
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Affiliation(s)
- Debora Gasperini
- Department of Molecular Signal Processing, Leibniz Institute of Plant Biochemistry, Halle 06120, Germany
| | - Gregg A Howe
- Department of Energy-Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA
- Plant Resilience Institute, Michigan State University, East Lansing, MI 42284, USA
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3
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Huang J, Zhao X, Zhang Y, Chen Y, Zhang X, Yi Y, Ju Z, Sun W. Chalcone-Synthase-Encoding RdCHS1 Is Involved in Flavonoid Biosynthesis in Rhododendron delavayi. Molecules 2024; 29:1822. [PMID: 38675642 PMCID: PMC11054853 DOI: 10.3390/molecules29081822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 03/18/2024] [Accepted: 04/10/2024] [Indexed: 04/28/2024] Open
Abstract
Flower color is an important ornamental feature that is often modulated by the contents of flavonoids. Chalcone synthase is the first key enzyme in the biosynthesis of flavonoids, but little is known about the role of R. delavayi CHS in flavonoid biosynthesis. In this paper, three CHS genes (RdCHS1-3) were successfully cloned from R. delavayi flowers. According to multiple sequence alignment and a phylogenetic analysis, only RdCHS1 contained all the highly conserved and important residues, which was classified into the cluster of bona fide CHSs. RdCHS1 was then subjected to further functional analysis. Real-time PCR analysis revealed that the transcripts of RdCHS1 were the highest in the leaves and lowest in the roots; this did not match the anthocyanin accumulation patterns during flower development. Biochemical characterization displayed that RdCHS1 could catalyze p-coumaroyl-CoA and malonyl-CoA molecules to produce naringenin chalcone. The physiological function of RdCHS1 was checked in Arabidopsis mutants and tobacco, and the results showed that RdCHS1 transgenes could recover the color phenotypes of the tt4 mutant and caused the tobacco flower color to change from pink to dark pink through modulating the expressions of endogenous structural and regulatory genes in the tobacco. All these results demonstrate that RdCHS1 fulfills the function of a bona fide CHS and contributes to flavonoid biosynthesis in R. delavayi.
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Affiliation(s)
- Ju Huang
- Key Laboratory of State Forestry Administration on Biodiversity Conservation in Karst Mountain Area of Southwest of China, School of Life Science, Guizhou Normal University, Guiyang 550025, China; (J.H.); (X.Z.); (Y.Z.); (Y.C.); (X.Z.); (Y.Y.)
| | - Xin Zhao
- Key Laboratory of State Forestry Administration on Biodiversity Conservation in Karst Mountain Area of Southwest of China, School of Life Science, Guizhou Normal University, Guiyang 550025, China; (J.H.); (X.Z.); (Y.Z.); (Y.C.); (X.Z.); (Y.Y.)
| | - Yan Zhang
- Key Laboratory of State Forestry Administration on Biodiversity Conservation in Karst Mountain Area of Southwest of China, School of Life Science, Guizhou Normal University, Guiyang 550025, China; (J.H.); (X.Z.); (Y.Z.); (Y.C.); (X.Z.); (Y.Y.)
| | - Yao Chen
- Key Laboratory of State Forestry Administration on Biodiversity Conservation in Karst Mountain Area of Southwest of China, School of Life Science, Guizhou Normal University, Guiyang 550025, China; (J.H.); (X.Z.); (Y.Z.); (Y.C.); (X.Z.); (Y.Y.)
| | - Ximin Zhang
- Key Laboratory of State Forestry Administration on Biodiversity Conservation in Karst Mountain Area of Southwest of China, School of Life Science, Guizhou Normal University, Guiyang 550025, China; (J.H.); (X.Z.); (Y.Z.); (Y.C.); (X.Z.); (Y.Y.)
| | - Yin Yi
- Key Laboratory of State Forestry Administration on Biodiversity Conservation in Karst Mountain Area of Southwest of China, School of Life Science, Guizhou Normal University, Guiyang 550025, China; (J.H.); (X.Z.); (Y.Z.); (Y.C.); (X.Z.); (Y.Y.)
| | - Zhigang Ju
- Pharmacy College, Guizhou University of Traditional Chinese Medicine, Guiyang 550025, China
| | - Wei Sun
- Key Laboratory of State Forestry Administration on Biodiversity Conservation in Karst Mountain Area of Southwest of China, School of Life Science, Guizhou Normal University, Guiyang 550025, China; (J.H.); (X.Z.); (Y.Z.); (Y.C.); (X.Z.); (Y.Y.)
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4
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Naik J, Tyagi S, Rajput R, Kumar P, Pucker B, Bisht NC, Misra P, Stracke R, Pandey A. Flavonols affect the interrelated glucosinolate and camalexin biosynthetic pathways in Arabidopsis thaliana. JOURNAL OF EXPERIMENTAL BOTANY 2024; 75:219-240. [PMID: 37813680 DOI: 10.1093/jxb/erad391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 10/04/2023] [Indexed: 10/11/2023]
Abstract
Flavonols are structurally and functionally diverse biomolecules involved in plant biotic and abiotic stress tolerance, pollen development, and inhibition of auxin transport. However, their effects on global gene expression and signaling pathways are unclear. To explore the roles of flavonol metabolites in signaling, we performed comparative transcriptome and targeted metabolite profiling of seedlings from the flavonol-deficient Arabidopsis loss-of-function mutant flavonol synthase1 (fls1) with and without exogenous supplementation of flavonol derivatives (kaempferol, quercetin, and rutin). RNA-seq results indicated that flavonols modulate various biological and metabolic pathways, with significant alterations in camalexin and aliphatic glucosinolate synthesis. Flavonols negatively regulated camalexin biosynthesis but appeared to promote the accumulation of aliphatic glucosinolates via transcription factor-mediated up-regulation of biosynthesis genes. Interestingly, upstream amino acid biosynthesis genes involved in methionine and tryptophan synthesis were altered under flavonol deficiency and exogenous supplementation. Quercetin treatment significantly up-regulated aliphatic glucosinolate biosynthesis genes compared with kaempferol and rutin. In addition, expression and metabolite analysis of the transparent testa7 mutant, which lacks hydroxylated flavonol derivatives, clarified the role of quercetin in the glucosinolate biosynthesis pathway. This study elucidates the molecular mechanisms by which flavonols interfere with signaling pathways, their molecular targets, and the multiple biological activities of flavonols in plants.
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Affiliation(s)
- Jogindra Naik
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Shivi Tyagi
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Ruchika Rajput
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Pawan Kumar
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Boas Pucker
- Faculty of Biology, Genetics and Genomics of Plants, Bielefeld University, 33615 Bielefeld, Germany
| | - Naveen C Bisht
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Prashant Misra
- Plant Sciences and Agrotechnology Division, CSIR-Indian Institute of Integrative Medicine, Canal Road, Jammu 180001, India
| | - Ralf Stracke
- Faculty of Biology, Genetics and Genomics of Plants, Bielefeld University, 33615 Bielefeld, Germany
| | - Ashutosh Pandey
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi 110067, India
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5
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Guo Y, Li D, Liu T, Li Y, Liu J, He M, Cui X, Liu Z, Chen M. Genome-Wide Identification of PAP1 Direct Targets in Regulating Seed Anthocyanin Biosynthesis in Arabidopsis. Int J Mol Sci 2023; 24:16049. [PMID: 38003239 PMCID: PMC10671800 DOI: 10.3390/ijms242216049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 10/31/2023] [Accepted: 11/02/2023] [Indexed: 11/26/2023] Open
Abstract
Anthocyanins are widespread water-soluble pigments in the plant kingdom. Anthocyanin accumulation is activated by the MYB-bHLH-WD40 (MBW) protein complex. In Arabidopsis, the R2R3-MYB transcription factor PAP1 activates anthocyanin biosynthesis. While prior research primarily focused on seedlings, seeds received limited attention. This study explores PAP1's genome-wide target genes in anthocyanin biosynthesis in seeds. Our findings confirm that PAP1 is a positive regulator of anthocyanin biosynthesis in Arabidopsis seeds. PAP1 significantly increased anthocyanin content in developing and mature seeds in Arabidopsis. Transcriptome analysis at 12 days after pollination reveals the upregulation of numerous genes involved in anthocyanin accumulation in 35S:PAP1 developing seeds. Chromatin immunoprecipitation and dual luciferase reporter assays demonstrate PAP1's direct promotion of ten key genes and indirect upregulation of TT8, TTG1, and eight key genes during seed maturation, thus enhancing seed anthocyanin accumulation. These findings enhance our understanding of PAP1's novel role in regulating anthocyanin accumulation in Arabidopsis seeds.
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Affiliation(s)
- Yuan Guo
- Shaanxi Key Laboratory of Crop Heterosis, National Yangling Agricultural Biotechnology and Breeding Center, College of Agronomy, Northwest A&F University, Yangling 712100, China; (Y.G.); (T.L.); (Y.L.); (J.L.); (M.H.); (X.C.); (Z.L.)
| | - Dong Li
- The Engineering Research Institute of Agriculture and Forestry, Ludong University, Yantai 264025, China;
| | - Tiantian Liu
- Shaanxi Key Laboratory of Crop Heterosis, National Yangling Agricultural Biotechnology and Breeding Center, College of Agronomy, Northwest A&F University, Yangling 712100, China; (Y.G.); (T.L.); (Y.L.); (J.L.); (M.H.); (X.C.); (Z.L.)
| | - Yuxin Li
- Shaanxi Key Laboratory of Crop Heterosis, National Yangling Agricultural Biotechnology and Breeding Center, College of Agronomy, Northwest A&F University, Yangling 712100, China; (Y.G.); (T.L.); (Y.L.); (J.L.); (M.H.); (X.C.); (Z.L.)
| | - Jiajia Liu
- Shaanxi Key Laboratory of Crop Heterosis, National Yangling Agricultural Biotechnology and Breeding Center, College of Agronomy, Northwest A&F University, Yangling 712100, China; (Y.G.); (T.L.); (Y.L.); (J.L.); (M.H.); (X.C.); (Z.L.)
| | - Mingyuan He
- Shaanxi Key Laboratory of Crop Heterosis, National Yangling Agricultural Biotechnology and Breeding Center, College of Agronomy, Northwest A&F University, Yangling 712100, China; (Y.G.); (T.L.); (Y.L.); (J.L.); (M.H.); (X.C.); (Z.L.)
| | - Xiaohui Cui
- Shaanxi Key Laboratory of Crop Heterosis, National Yangling Agricultural Biotechnology and Breeding Center, College of Agronomy, Northwest A&F University, Yangling 712100, China; (Y.G.); (T.L.); (Y.L.); (J.L.); (M.H.); (X.C.); (Z.L.)
| | - Zijin Liu
- Shaanxi Key Laboratory of Crop Heterosis, National Yangling Agricultural Biotechnology and Breeding Center, College of Agronomy, Northwest A&F University, Yangling 712100, China; (Y.G.); (T.L.); (Y.L.); (J.L.); (M.H.); (X.C.); (Z.L.)
| | - Mingxun Chen
- Shaanxi Key Laboratory of Crop Heterosis, National Yangling Agricultural Biotechnology and Breeding Center, College of Agronomy, Northwest A&F University, Yangling 712100, China; (Y.G.); (T.L.); (Y.L.); (J.L.); (M.H.); (X.C.); (Z.L.)
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6
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Danpreedanan N, Yamuangmorn S, Jamjod S, Prom-U-Thai C, Pusadee T. Genotypic Variation of Purple Rice in Response to Shading in Yield, Anthocyanin Content, and Gene Expression. PLANTS (BASEL, SWITZERLAND) 2023; 12:2582. [PMID: 37447142 DOI: 10.3390/plants12132582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 07/04/2023] [Accepted: 07/05/2023] [Indexed: 07/15/2023]
Abstract
Purple rice (Oryza sativa L.) contains anthocyanin, which acts as an antioxidant and functional food for humans. The levels of anthocyanin growth and production in rice are mainly controlled by the availability of light. However, shade can affect anthocyanin biosynthesis genes. Therefore, the objective of this study was to determine the yield and anthocyanin content among four purple rice varieties, which provide the difference in colors of purple and green leaves. This study also evaluated gene expression affected by shading treatment to understand the relation of grain anthocyanin and expression level. This research was conducted using a split plot design using four levels of shading (levels of shading from anthesis to maturity) with three replications, no shading, 30% shading, 50% shading, and 70% shading, as the main plots and purple rice varieties as subplots, KJ CMU-107, K2, K4, and KDK10, from anthesis to maturity. Shading significantly decreased yield and yield components, but increased grain anthocyanin content. Nonetheless, the response of yield and grain anthocyanin content to shading did not show a significant different between purple and green leaf varieties. In addition, the level of OsDFR gene expression was different depending on the shading level in four rice varieties. The OsDFR gene presented the highest expression at shading levels of 30% for K4 and 50% for KDK10, while the expression of the OsDFR gene was not detected in the purple rice varieties with green leaves (KJ CMU-107 and K2). The response of grain anthocyanin and gene expression of OsDFR to light treatment did not show significantly differences between the purple and green leaf varieties, suggesting that the appearance of anthocyanin in leaves might be not related to anthocyanin synthesis in the grain. Taken together, the results suggest that some purple rice varieties were more suitable for planting under low light intensity based on a lower level of grain yield loss, strong shade tolerance, and high anthocyanin content in leaf and grain pericarp. However, it is necessary to explore the effects of light intensity on genes and intermediates in the anthocyanin synthesis pathway for further study.
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Affiliation(s)
- Nantapat Danpreedanan
- Department of Plant and Soil Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
| | | | - Sansanee Jamjod
- Department of Plant and Soil Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
- Lanna Rice Research Center, Chiang Mai University, Chiang Mai 50100, Thailand
| | - Chanakan Prom-U-Thai
- Department of Plant and Soil Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
- Lanna Rice Research Center, Chiang Mai University, Chiang Mai 50100, Thailand
| | - Tonapha Pusadee
- Department of Plant and Soil Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
- Lanna Rice Research Center, Chiang Mai University, Chiang Mai 50100, Thailand
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7
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Chen X, Wu Y, Yu Z, Gao Z, Ding Q, Shah SHA, Lin W, Li Y, Hou X. BcMYB111 Responds to BcCBF2 and Induces Flavonol Biosynthesis to Enhance Tolerance under Cold Stress in Non-Heading Chinese Cabbage. Int J Mol Sci 2023; 24:ijms24108670. [PMID: 37240015 DOI: 10.3390/ijms24108670] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 05/08/2023] [Accepted: 05/10/2023] [Indexed: 05/28/2023] Open
Abstract
Flavonols have been shown to respond to a variety of abiotic stresses in plants, including cold stress. Higher total flavonoid content was found in non-heading Chinese cabbage (NHCC, Brassica campestris (syn. Brassica rapa) ssp. chinensis) after cold stress. A non-targeted metabolome analysis showed a significant increase in flavonol content, including that of quercetin and kaempferol. Here, we found that an R2R3-MYB transcription factor, BcMYB111, may play a role in this process. BcMYB111 was up-regulated in response to cold treatment, with an accompanying accumulation of flavonols. Then, it was found that BcMYB111 could regulate the synthesis of flavonols by directly binding to the promoters of BcF3H and BcFLS1. In the transgenic hairy roots of NHCC or stable transgenic Arabidopsis, overexpression of BcMYB111 increased flavonol synthesis and accumulation, while these were reduced in virus-induced gene silencing lines in NHCC. After cold stress, the higher proline content and lower malondialdehyde (MDA) content showed that there was less damage in transgenic Arabidopsis than in the wild-type (WT). The BcMYB111 transgenic lines performed better in terms of antioxidant capacity because of their lower H2O2 content and higher superoxide dismutase (SOD) and peroxidase (POD) enzyme activities. In addition, a key cold signaling gene, BcCBF2, could specifically bind to the DRE element and activate the expression of BcMYB111 in vitro and in vivo. The results suggested that BcMYB111 played a positive role in enhancing the flavonol synthesis and cold tolerance of NHCC. Taken together, these findings reveal that cold stress induces the accumulation of flavonols to increase tolerance via the pathway of BcCBF2-BcMYB111-BcF3H/BcFLS1 in NHCC.
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Affiliation(s)
- Xiaoshan Chen
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China), Engineering Research Center of Germplasm Enhancement and Utilization of Horticultural Crops, Nanjing Agricultural University, Nanjing 210095, China
| | - Ying Wu
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China), Engineering Research Center of Germplasm Enhancement and Utilization of Horticultural Crops, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhanghong Yu
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China), Engineering Research Center of Germplasm Enhancement and Utilization of Horticultural Crops, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhanyuan Gao
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China), Engineering Research Center of Germplasm Enhancement and Utilization of Horticultural Crops, Nanjing Agricultural University, Nanjing 210095, China
- Nanjing Suman Plasma Engineering Research Institute Co., Ltd., Nanjing 211162, China
| | - Qiang Ding
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China), Engineering Research Center of Germplasm Enhancement and Utilization of Horticultural Crops, Nanjing Agricultural University, Nanjing 210095, China
| | - Sayyed Hamad Ahmad Shah
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China), Engineering Research Center of Germplasm Enhancement and Utilization of Horticultural Crops, Nanjing Agricultural University, Nanjing 210095, China
| | - Wenyuan Lin
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China), Engineering Research Center of Germplasm Enhancement and Utilization of Horticultural Crops, Nanjing Agricultural University, Nanjing 210095, China
| | - Ying Li
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China), Engineering Research Center of Germplasm Enhancement and Utilization of Horticultural Crops, Nanjing Agricultural University, Nanjing 210095, China
- Nanjing Suman Plasma Engineering Research Institute Co., Ltd., Nanjing 211162, China
| | - Xilin Hou
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (East China), Engineering Research Center of Germplasm Enhancement and Utilization of Horticultural Crops, Nanjing Agricultural University, Nanjing 210095, China
- Nanjing Suman Plasma Engineering Research Institute Co., Ltd., Nanjing 211162, China
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8
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Kumar Patel M, Fanyuk M, Feyngenberg O, Maurer D, Sela N, Ovadia R, Oren Sahmir M, Alkan N. Phenylalanine induces mango fruit resistance against chilling injuries during storage at suboptimal temperature. Food Chem 2022; 405:134909. [DOI: 10.1016/j.foodchem.2022.134909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 10/06/2022] [Accepted: 11/08/2022] [Indexed: 11/21/2022]
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9
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Sugimoto K, Zager JJ, Aubin BS, Lange B, Howe GA. Flavonoid deficiency disrupts redox homeostasis and terpenoid biosynthesis in glandular trichomes of tomato. PLANT PHYSIOLOGY 2022; 188:1450-1468. [PMID: 34668550 PMCID: PMC8896623 DOI: 10.1093/plphys/kiab488] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 09/23/2021] [Indexed: 05/11/2023]
Abstract
Glandular trichomes (GTs) are epidermal structures that provide the first line of chemical defense against arthropod herbivores and other biotic threats. The most conspicuous structure on leaves of cultivated tomato (Solanum lycopersicum) is the type-VI GT (tVI-GT), which accumulates both flavonoids and volatile terpenoids. Although these classes of specialized metabolites are derived from distinct metabolic pathways, previous studies with a chalcone isomerase 1 (CHI1)-deficient mutant called anthocyanin free (af) showed that flavonoids are required for terpenoid accumulation in tVI-GTs. Here, we combined global transcriptomic and proteomic analyses of isolated trichomes as a starting point to show that the lack of CHI1 is associated with reduced levels of terpenoid biosynthetic transcripts and enzymes. The flavonoid deficiency in af trichomes also resulted in the upregulation of abiotic stress-responsive genes associated with DNA damage and repair. Several lines of biochemical and genetic evidence indicate that the terpenoid defect in af mutants is specific for the tVI-GT and is associated with the absence of bulk flavonoids rather than loss of CHI1 per se. A newly developed genome-scale model of metabolism in tomato tVI-GTs helped identify metabolic imbalances caused by the loss of flavonoid production. We provide evidence that flavonoid deficiency in this cell type leads to increased production of reactive oxygen species (ROS), which may impair terpenoid biosynthesis. Collectively, our findings support a role for flavonoids as ROS-scavenging antioxidants in GTs.
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Affiliation(s)
- Koichi Sugimoto
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, Michigan, 48824, USA
| | - Jordan J Zager
- Institute of Biological Chemistry and M.J. Murdock Metabolomics Laboratory, Washington State University, Pullman, Washington, 99164-7411, USA
| | - Brian St Aubin
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, Michigan, 48824, USA
| | - Bernd Markus Lange
- Institute of Biological Chemistry and M.J. Murdock Metabolomics Laboratory, Washington State University, Pullman, Washington, 99164-7411, USA
| | - Gregg A Howe
- MSU-DOE Plant Research Laboratory, Michigan State University, East Lansing, Michigan, 48824, USA
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan, 48824, USA
- Plant Resilience Institute, Michigan State University, East Lansing, Michigan, 48824, USA
- Author for communication:
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10
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Durán-Medina Y, Ruiz-Cortés BE, Guerrero-Largo H, Marsch-Martínez N. Specialized metabolism and development: An unexpected friendship. CURRENT OPINION IN PLANT BIOLOGY 2021; 64:102142. [PMID: 34856480 DOI: 10.1016/j.pbi.2021.102142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 10/12/2021] [Accepted: 10/19/2021] [Indexed: 06/13/2023]
Abstract
Plants produce a myriad of metabolites. Some of them have been regarded for a long time as secondary or specialized metabolites and are considered to have functions mostly in defense and the adaptation of plants to their environment. However, in the last years, new research has shown that these metabolites can also have roles in the regulation of plant growth and development, some acting as signals, through the interaction with hormonal pathways, and some independently of them. These reports provide a glimpse of the functional possibilities that specialized metabolites present in the modulation of plant development and encourage more research in this direction.
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Affiliation(s)
- Yolanda Durán-Medina
- Biotecnology and Biochemistry Department, Centre for Research and Advanced Studies (CINVESTAV-IPN) Irapuato Unit, Mexico
| | - Beatriz Esperanza Ruiz-Cortés
- Biotecnology and Biochemistry Department, Centre for Research and Advanced Studies (CINVESTAV-IPN) Irapuato Unit, Mexico
| | - Herenia Guerrero-Largo
- Biotecnology and Biochemistry Department, Centre for Research and Advanced Studies (CINVESTAV-IPN) Irapuato Unit, Mexico
| | - Nayelli Marsch-Martínez
- Biotecnology and Biochemistry Department, Centre for Research and Advanced Studies (CINVESTAV-IPN) Irapuato Unit, Mexico.
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Morales-Quintana L, Ramos P. A Talk between Flavonoids and Hormones to Reorient the Growth of Gymnosperms. Int J Mol Sci 2021; 22:ijms222312630. [PMID: 34884435 PMCID: PMC8657560 DOI: 10.3390/ijms222312630] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 11/20/2021] [Accepted: 11/20/2021] [Indexed: 12/05/2022] Open
Abstract
Plants reorient the growth of affected organs in response to the loss of gravity vector. In trees, this phenomenon has received special attention due to its importance for the forestry industry of conifer species. Sustainable management is a key factor in improving wood quality. It is of paramount importance to understand the molecular and genetic mechanisms underlying wood formation, together with the hormonal and environmental factors that affect wood formation and quality. Hormones are related to the modulation of vertical growth rectification. Many studies have resulted in a model that proposes differential growth in the stem due to unequal auxin and jasmonate allocation. Furthermore, many studies have suggested that in auxin distribution, flavonoids act as molecular controllers. It is well known that flavonoids affect auxin flux, and this is a new area of study to understand the intracellular concentrations and how these compounds can control the gravitropic response. In this review, we focused on different molecular aspects related to the hormonal role in flavonoid homeostasis and what has been done in conifer trees to identify molecular players that could take part during the gravitropic response and reduce low-quality wood formation.
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Affiliation(s)
- Luis Morales-Quintana
- Multidisciplinary Agroindustry Research Laboratory, Instituto de Ciencias Biomédicas, Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Talca 3467987, Chile
- Correspondence: (L.M.-Q.); (P.R.); Tel.: +56-71-2735-699 (L.M.-Q.); +56-73-2213-501 (P.R.)
| | - Patricio Ramos
- Centro de Investigación de Estudios Avanzados del Maule (CIEAM), Vicerrectoría de Investigación y Postgrado, Universidad Católica del Maule, Talca 3460000, Chile
- Centro de Biotecnología de los Recursos Naturales (CenBio), Facultad de Ciencias Agrarias y Forestales, Universidad Católica del Maule, Talca 3460000, Chile
- Centro del Secano, Facultad de Ciencias Agrarias y Forestales, Universidad Católica del Maule, Talca 3460000, Chile
- Correspondence: (L.M.-Q.); (P.R.); Tel.: +56-71-2735-699 (L.M.-Q.); +56-73-2213-501 (P.R.)
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12
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Sun W, Zhou N, Feng C, Sun S, Tang M, Tang X, Ju Z, Yi Y. Functional analysis of a dihydroflavonol 4-reductase gene in Ophiorrhiza japonica (OjDFR1) reveals its role in the regulation of anthocyanin. PeerJ 2021; 9:e12323. [PMID: 34721993 PMCID: PMC8541326 DOI: 10.7717/peerj.12323] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 09/26/2021] [Indexed: 12/29/2022] Open
Abstract
Dihydroflavonol 4-reductase (DFR), a key regulatory enzyme, participated in the biosynthesis of anthocyanins, proanthocyanidins and other flavonoids that essential for plant survival and human health. However, the role of this enzyme in Ophiorrhiza japonica is still unknown. Here, three putative DFR-like genes were firstly isolated from O. japonica. Phylogenetic analysis indicated that OjDFR1 was classified into DFR subgroup, while the rest two were clustered into other NADPH-dependent reductases. Then, functions of the three genes were further characterized. Expression analysis showed that OjDFR1 transcripts had strong correlations with the accumulation pattern of anthocyanin during the flower developmental, whereas other two were not, this suggested the potential roles of OjDFR1 in anthocyanin biosynthesis. Subsequently, all three clones were functionally expressed in Escherichia coli, but confirming that only OjDFR1 encode active DFR proteins that catalyzed the reduction of dihydroflavonols to leucoanthocyanidin. Consistant with the biochemical assay results, overexpressing OjDFR1 in Arabidopsis tt3-1 mutant successfully restored the deficiency of anthocyanin and proanthocyanidin, hinting its function as DFR in planta. Additionally, heterologous expression of OjDFR1 in transgenic tobacco contributed to darker flower color via up-regulating the expressions of endogenous NtANS and NtUFGT, which suggested that OjDFR1 was involved in flower color development. In summary, this study validates the functions of OjDFR1 and expands our understanding of anthocyanin biosynthesis in O. japonica.
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Affiliation(s)
- Wei Sun
- Key Laboratory of State Forestry Administration on Biodiversity Conservation in Karst Mountain Area of Southwest of China, School of Life Science, Guizhou Normal University, Guiyang, China
| | - Nana Zhou
- Key Laboratory of State Forestry Administration on Biodiversity Conservation in Karst Mountain Area of Southwest of China, School of Life Science, Guizhou Normal University, Guiyang, China
| | - Cai Feng
- Key Laboratory of State Forestry Administration on Biodiversity Conservation in Karst Mountain Area of Southwest of China, School of Life Science, Guizhou Normal University, Guiyang, China
| | - Shiyu Sun
- Key Laboratory of State Forestry Administration on Biodiversity Conservation in Karst Mountain Area of Southwest of China, School of Life Science, Guizhou Normal University, Guiyang, China
| | - Ming Tang
- Key Laboratory of State Forestry Administration on Biodiversity Conservation in Karst Mountain Area of Southwest of China, School of Life Science, Guizhou Normal University, Guiyang, China
| | - Xiaoxin Tang
- Key Laboratory of State Forestry Administration on Biodiversity Conservation in Karst Mountain Area of Southwest of China, School of Life Science, Guizhou Normal University, Guiyang, China
| | - Zhigang Ju
- Pharmacy College, Guizhou University of Traditional Chinese Medicine, Guiyang, China
| | - Yin Yi
- Key Laboratory of State Forestry Administration on Biodiversity Conservation in Karst Mountain Area of Southwest of China, School of Life Science, Guizhou Normal University, Guiyang, China.,Key Laboratory of Plant Physiology and Development Regulation, School of Life Science, Guizhou Normal University, Guiyang, China
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13
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Meyer P, Van de Poel B, De Coninck B. UV-B light and its application potential to reduce disease and pest incidence in crops. HORTICULTURE RESEARCH 2021; 8:194. [PMID: 34465753 PMCID: PMC8408258 DOI: 10.1038/s41438-021-00629-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 07/08/2021] [Accepted: 07/13/2021] [Indexed: 05/03/2023]
Abstract
Ultraviolet-B radiation (280-315 nm), perceived by the plant photoreceptor UVR8, is a key environmental signal that influences plant growth and development and can reduce disease and pest incidence. The positive effect of UV-B on disease resistance and incidence in various plant species supports the implementation of supplemental UV-B radiation in sustainable crop production. However, despite many studies focusing on UV-B light, there is no consensus on the best mode of application. This review aims to analyze, evaluate, and organize the different application strategies of UV-B radiation in crop production with a focus on disease resistance. We summarize the physiological effects of UV-B light on plants and discuss how plants perceive and transduce UV-B light by the UVR8 photoreceptor as well as how this perception alters plant specialized metabolite production. Next, we bring together conclusions of various studies with respect to different UV-B application methods to improve plant resistance. In general, supplemental UV-B light has a positive effect on disease resistance in many plant-pathogen combinations, mainly through the induction of the production of specialized metabolites. However, many variables (UV-B light source, plant species, dose and intensity, timing during the day, duration, background light, etc.) make it difficult to compare and draw general conclusions. We compiled the information of recent studies on UV-B light applications, including e.g., details on the UV-B light source, experimental set-up, calculated UV-B light dose, intensity, and duration. This review provides practical insights and facilitates future research on UV-B radiation as a promising tool to reduce disease and pest incidence.
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Affiliation(s)
- Prisca Meyer
- Division of Crop Biotechnics, Department of Biosystems, KU Leuven, 3001, Leuven, Belgium
| | - Bram Van de Poel
- Division of Crop Biotechnics, Department of Biosystems, KU Leuven, 3001, Leuven, Belgium
| | - Barbara De Coninck
- Division of Crop Biotechnics, Department of Biosystems, KU Leuven, 3001, Leuven, Belgium.
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Flavonone 3-hydroxylase Relieves Bacterial Leaf Blight Stress in Rice via Overaccumulation of Antioxidant Flavonoids and Induction of Defense Genes and Hormones. Int J Mol Sci 2021; 22:ijms22116152. [PMID: 34200345 PMCID: PMC8201380 DOI: 10.3390/ijms22116152] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 06/02/2021] [Accepted: 06/05/2021] [Indexed: 11/20/2022] Open
Abstract
Efficient accumulation of flavonoids is important for increased tolerance to biotic stress. Although several plant defense mechanisms are known, the roles of many pathways, proteins, and secondary metabolites in stress tolerance are unknown. We generated a flavanone 3-hydroxylase (F3H) overexpressor rice line and inoculated Xanthomonas Oryzae pv. oryzae and compared the control and wildtype inoculated plants. In addition to promoting plant growth and developmental maintenance, the overexpression of F3H increased the accumulation of flavonoids and increased tolerance to bacterial leaf blight (BLB) stress. Moreover, leaf lesion length was higher in the infected wildtype plants compared with infected transgenics. Kaempferol and quercetin, which scavenge reactive oxygen species, overaccumulated in transgenic lines compared with wildtypes in response to pathogenic infection, detected by scanning electron microscopy and spectrophotometry. The induction of F3H altered the antioxidant system and reduced the levels of glutathione peroxidase activity and malondialdehyde (MDA) contents in the transgenic lines compared with the wildtypes. Downstream gene regulation analysis showed that the expression of F3H increased the regulation of flavonol synthase (FLS), dihydroflavonol 4-reductase (DFR), and slender rice mutant (SLR1) during BLB stress. The analysis of SA and JA signaling revealed an antagonistic interaction between both hormones and that F3H induction significantly promoted SA and inhibited JA accumulation in the transgenic lines. SA-dependent nonexpressor pathogenesis-related (NPR1) and Xa1 showed significant upregulation in the infected transgenic lines compared with the infected control and wildtype lines. Thus, the overexpression of F3H was essential for increasing BLB stress tolerance.
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15
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Xu X, Zhang L, Zhao W, Fu L, Han Y, Wang K, Yan L, Li Y, Zhang XH, Min DH. Genome-wide analysis of the serine carboxypeptidase-like protein family in Triticum aestivum reveals TaSCPL184-6D is involved in abiotic stress response. BMC Genomics 2021; 22:350. [PMID: 33992092 PMCID: PMC8126144 DOI: 10.1186/s12864-021-07647-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Accepted: 04/21/2021] [Indexed: 12/17/2022] Open
Abstract
Background The serine carboxypeptidase-like protein (SCPL) family plays a vital role in stress response, growth, development and pathogen defense. However, the identification and functional analysis of SCPL gene family members have not yet been performed in wheat. Results In this study, we identified a total of 210 candidate genes encoding SCPL proteins in wheat. According to their structural characteristics, it is possible to divide these members into three subfamilies: CPI, CPII and CPIII. We uncovered a total of 209 TaSCPL genes unevenly distributed across 21 wheat chromosomes, of which 65.7% are present in triads. Gene duplication analysis showed that ~ 10.5% and ~ 64.8% of the TaSCPL genes are derived from tandem and segmental duplication events, respectively. Moreover, the Ka/Ks ratios between duplicated TaSCPL gene pairs were lower than 0.6, which suggests the action of strong purifying selection. Gene structure analysis showed that most of the TaSCPL genes contain multiple introns and that the motifs present in each subfamily are relatively conserved. Our analysis on cis-acting elements showed that the promoter sequences of TaSCPL genes are enriched in drought-, ABA- and MeJA-responsive elements. In addition, we studied the expression profiles of TaSCPL genes in different tissues at different developmental stages. We then evaluated the expression levels of four TaSCPL genes by qRT-PCR, and selected TaSCPL184-6D for further downstream analysis. The results showed an enhanced drought and salt tolerance among TaSCPL184-6D transgenic Arabidopsis plants, and that the overexpression of the gene increased proline and decreased malondialdehyde levels, which might help plants adapting to adverse environments. Our results provide comprehensive analyses of wheat SCPL genes that might work as a reference for future studies aimed at improving drought and salt tolerance in wheat. Conclusions We conducte a comprehensive bioinformatic analysis of the TaSCPL gene family in wheat, which revealing the potential roles of TaSCPL genes in abiotic stress. Our analysis also provides useful resources for improving the resistance of wheat. Supplementary Information The online version contains supplementary material available at 10.1186/s12864-021-07647-6.
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Affiliation(s)
- Xiaomin Xu
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Agronomy, Northwest A&F University, Yangling, Shaanxi, China
| | - Lili Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Agronomy, Northwest A&F University, Yangling, Shaanxi, China
| | - Wan Zhao
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Agronomy, Northwest A&F University, Yangling, Shaanxi, China
| | - Liang Fu
- Xinxiang Academy of Agricultural Sciences of He'nan Province, Xinxiang, China
| | - Yuxuan Han
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Agronomy, Northwest A&F University, Yangling, Shaanxi, China
| | - Keke Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Agronomy, Northwest A&F University, Yangling, Shaanxi, China
| | - Luyu Yan
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
| | - Ye Li
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China
| | - Xiao-Hong Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, China.
| | - Dong-Hong Min
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Agronomy, Northwest A&F University, Yangling, Shaanxi, China.
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16
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Dare AP, Tomes S, McGhie TK, van Klink JW, Sandanayaka M, Hallett IC, Atkinson RG. Overexpression of chalcone isomerase in apple reduces phloridzin accumulation and increases susceptibility to herbivory by two-spotted mites. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2020; 103:293-307. [PMID: 32096261 DOI: 10.1111/tpj.14729] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 01/28/2020] [Accepted: 02/17/2020] [Indexed: 05/19/2023]
Abstract
Apples (Malus spp.) accumulate significant quantities of the dihydrochalcone glycoside, phloridzin, whilst pears (Pyrus spp.) do not. To explain this difference, we hypothesized that a metabolic bottleneck in the phenylpropanoid pathway might exist in apple. Expression analysis indicated that transcript levels of early phenylpropanoid pathway genes in apple and pear leaves were similar, except for chalcone isomerase (CHI), which was much lower in apple. Apples also showed very low CHI activity compared with pear. To relieve the bottleneck at CHI, transgenic apple plants overexpressing the Arabidopsis AtCHI gene were produced. Unlike other transgenic apples where phenylpropanoid flux was manipulated, AtCHI overexpression (CHIox) plants were phenotypically indistinguishable from wild-type, except for an increase in red pigmentation in expanding leaves. CHIox plants accumulated slightly increased levels of flavanols and flavan-3-ols in the leaves, but the major change was a 2.8- to 19-fold drop in phloridzin concentrations compared with wild-type. The impact of these phytochemical changes on insect preference was studied using a two-choice leaf assay with the polyphagous apple pest, the two-spotted spider mite (Tetranychus urticae Koch). Transgenic CHIox leaves were more susceptible to herbivory, an effect that could be reversed (complemented) by application of phloridzin to transgenic leaves. Taken together, these findings shed new light on phenylpropanoid biosynthesis in apple and suggest a new physiological role for phloridzin as an antifeedant in leaves.
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Affiliation(s)
- Andrew P Dare
- The New Zealand Institute for Plant and Food Research Ltd (PFR), Private Bag 92169, Auckland, New Zealand
| | - Sumathi Tomes
- The New Zealand Institute for Plant and Food Research Ltd (PFR), Private Bag 92169, Auckland, New Zealand
| | - Tony K McGhie
- PFR, Private Bag 11600, Palmerston North, 4442, New Zealand
| | - John W van Klink
- PFR Department of Chemistry, University of Otago, Box 56, Dunedin, 9054, New Zealand
| | - Manoharie Sandanayaka
- The New Zealand Institute for Plant and Food Research Ltd (PFR), Private Bag 92169, Auckland, New Zealand
| | - Ian C Hallett
- The New Zealand Institute for Plant and Food Research Ltd (PFR), Private Bag 92169, Auckland, New Zealand
| | - Ross G Atkinson
- The New Zealand Institute for Plant and Food Research Ltd (PFR), Private Bag 92169, Auckland, New Zealand
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17
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Synergy between the anthocyanin and RDR6/SGS3/DCL4 siRNA pathways expose hidden features of Arabidopsis carbon metabolism. Nat Commun 2020; 11:2456. [PMID: 32415123 PMCID: PMC7229025 DOI: 10.1038/s41467-020-16289-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Accepted: 04/26/2020] [Indexed: 12/20/2022] Open
Abstract
Anthocyanin pigments furnish a powerful visual output of the stress and metabolic status of Arabidopsis thaliana plants. Essential for pigment accumulation is TRANSPARENT TESTA19 (TT19), a glutathione S-transferase proposed to bind and stabilize anthocyanins, participating in their vacuolar sequestration, a function conserved across the flowering plants. Here, we report the identification of genetic suppressors that result in anthocyanin accumulation in the absence of TT19. We show that mutations in RDR6, SGS3, or DCL4 suppress the anthocyanin defect of tt19 by pushing carbon towards flavonoid biosynthesis. This effect is not unique to tt19 and extends to at least one other anthocyanin pathway gene mutant. This synergy between mutations in components of the RDR6-SGS3-DCL4 siRNA system and the flavonoid pathway reveals genetic/epigenetic mechanisms regulating metabolic fluxes. TRANSPARENT TESTA19 (TT19) encodes a glutathione S-transferase which functions in anthocyanin stabilization and vacuolar transport. Here, by tt19 suppressor screening, the authors show that RDR6/SGS3/DCL4 siRNA pathway constituents synergistically interact with components of the flavonoid pathway to control carbon metabolism.
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18
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Sun L, Di DW, Li G, Li Y, Kronzucker HJ, Shi W. Transcriptome analysis of rice (Oryza sativa L.) in response to ammonium resupply reveals the involvement of phytohormone signaling and the transcription factor OsJAZ9 in reprogramming of nitrogen uptake and metabolism. JOURNAL OF PLANT PHYSIOLOGY 2020; 246-247:153137. [PMID: 32112956 DOI: 10.1016/j.jplph.2020.153137] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Revised: 02/07/2020] [Accepted: 02/10/2020] [Indexed: 05/28/2023]
Abstract
NH4+ is not only the primary nitrogen for rice, a well-known NH4+ specialist, but is also the chief limiting factor for its production. Limiting NH4+ triggers a series of physiological and biochemical responses that help rice optimise its nitrogen acquisition. However, the dynamic nature and spatial distribution of the adjustments at the whole plant level during this response are still unknown. Here, nitrogen-starved rice seedlings were treated with 0.1 mM (NH4)2SO4 for 4 or 12 h, and then the shoots and roots were harvested for RNA-Seq analysis. We identified 138 and 815 differentially expressed genes (DEGs) in shoots, and 597 and 1074 in roots following 4 and 12 h treatment, respectively. Up-regulated DEGs mainly participated in phenylpropanoid, sugar, and amino acid metabolism, which was confirmed by chemical content analysis. The transcription factor OsJAZ9 was the most pronouncedly induced component under low NH4+ in roots, and a significant increase in root growth, NH4+ absorption, amino acid, and sugar metabolism in response to resupplied NH4+ following nitrogen starvation was identified in JAZ9ox (OsJAZ9-overexpressed) and coi1 (OsCOI1-RNAi). Our data provide comprehensive insight into the whole-plant transcriptomic response in terms of metabolic processes and signaling transduction to a low-NH4+ signal, and identify the transcription factor OsJAZ9 and its involvement in the regulation of carbon/nitrogen metabolism as central to the response to low NH4+.
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Affiliation(s)
- Li Sun
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, No.71 East Beijing Road, Nanjing, Jiangsu, 210008, China; State Key Lab of Crop Genetics and Germplasm Enhancement, Cytogenetics Institute, Nanjing Agricultural University/JCIC-MCP, Nanjing, Jiangsu, 210095, China.
| | - Dong-Wei Di
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, No.71 East Beijing Road, Nanjing, Jiangsu, 210008, China.
| | - Guangjie Li
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, No.71 East Beijing Road, Nanjing, Jiangsu, 210008, China.
| | - Yilin Li
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, No.71 East Beijing Road, Nanjing, Jiangsu, 210008, China.
| | - Herbert J Kronzucker
- School of Agriculture and Food, The University of Melbourne, Parkville, VIC 3010, Australia; Faculty of Land and Food Systems, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada.
| | - Weiming Shi
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, No.71 East Beijing Road, Nanjing, Jiangsu, 210008, China.
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Sinha R, Bala M, Kumar M, Sharma TR, Singh AK. Methods for Screening Legume Crops for Abiotic Stress Tolerance through Physiological and Biochemical Approaches. Methods Mol Biol 2020; 2107:277-303. [PMID: 31893454 DOI: 10.1007/978-1-0716-0235-5_15] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
Legume crops are subjected to a wide range of abiotic stresses, which stimulate an array of physiological, biochemical, and molecular responses. However, different genotypes may exhibit significant variations between individual responses, which can determine their tolerance or susceptibility to these stresses. The present chapter suggests a broad range of assays that can help in understanding stress perception by plants at cellular and molecular levels. The genotypes may be sorted depending on their tolerance potential, by broadly analysing morphological, physiological, biochemical, and enzyme kinetics parameters. These assays are very beneficial in revealing the mechanism of stress perception and response in varied plant types, and have helped in discriminating contrasting genotypes. Here, we have described detailed protocols of assays which may be carried out to assess tolerance or susceptibility to abiotic stresses. The analysis, as a whole, can help researchers understand the effect of abiotic stresses on plant biochemical pathways, be it photosynthesis, redox homeostasis, metabolite perturbation, signaling, transcription, and translation. These protocols may be beneficial in identification of suitable donors for breeding programs, as well as for identifying promising candidate genes or pathways for developing stress tolerant legume crops through genetic engineering.
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Affiliation(s)
- Ragini Sinha
- ICAR-Indian Institute of Agricultural Biotechnology, Ranchi, India
| | - Meenu Bala
- ICAR-Indian Institute of Agricultural Biotechnology, Ranchi, India
- Vinoba Bhave University, Hazaribagh, India
| | - Madan Kumar
- ICAR-Indian Institute of Agricultural Biotechnology, Ranchi, India
| | - Tilak Raj Sharma
- ICAR-Indian Institute of Agricultural Biotechnology, Ranchi, India
| | - Anil Kumar Singh
- ICAR-Indian Institute of Agricultural Biotechnology, Ranchi, India.
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20
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Oshima M, Taniguchi Y, Akasaka M, Abe K, Ichikawa H, Tabei Y, Tanaka J. Development of a visible marker trait based on leaf sheath-specific anthocyanin pigmentation applicable to various genotypes in rice. BREEDING SCIENCE 2019; 69:244-254. [PMID: 31481833 PMCID: PMC6711742 DOI: 10.1270/jsbbs.18151] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 01/14/2019] [Indexed: 05/20/2023]
Abstract
To overcome a limitation to the breeding of autogamous crops, recurrent selection using transgenic male sterility (RSUTMS) has been proposed. In this system, negatively or positively selectable marker traits are required along with dominant transgenic male sterility. Anthocyanin pigmentation is an excellent marker trait. Two regulatory genes for MYB and bHLH and a structural gene for DFR are required for anthocyanin pigmentation in rice. Therefore, to apply anthocyanin pigmentation as a marker trait in various rice genotypes, coordinated expression of the three genes is required. In this study, we developed a leaf sheath-specific promoter and introduced three genes-DFR and C1/Myb, driven by the 35S promoter, and OsB2/bHLH, driven by the leaf sheath-specific promoter-into the rice genome. Leaf sheath-specific pigmentation was confirmed in all seven genotypes tested, which included japonica and indica cultivars. Analysis of genome sequence data from 25 cultivars showed that the strategy of conferring leaf sheath-specific anthocyanin pigmentation by introduction of these three genes would be effective for a wide range of genotypes and will be applicable to RSUTMS.
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Affiliation(s)
- Masao Oshima
- Institute of Agrobiological Sciences, NARO,
2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602,
Japan
| | - Yojiro Taniguchi
- Institute of Agrobiological Sciences, NARO,
2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602,
Japan
| | - Maiko Akasaka
- Institute of Crop Science, NARO,
2-1-2 Kannondai, Tsukuba, Ibaraki 305-8518,
Japan
| | - Kiyomi Abe
- Institute of Agrobiological Sciences, NARO,
2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602,
Japan
| | - Hiroaki Ichikawa
- Institute of Agrobiological Sciences, NARO,
2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602,
Japan
| | - Yutaka Tabei
- Institute of Agrobiological Sciences, NARO,
2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602,
Japan
| | - Junichi Tanaka
- Institute of Crop Science, NARO,
2-1-2 Kannondai, Tsukuba, Ibaraki 305-8518,
Japan
- Graduate School of Life and Environmental Science, University of Tsukuba,
2-1-2 Kannondai, Tsukuba, Ibaraki 305-8518,
Japan
- Corresponding author (e-mail: )
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21
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Liu Q, Tang J, Wang W, Zhang Y, Yuan H, Huang S. Transcriptome analysis reveals complex response of the medicinal/ornamental halophyte Iris halophila Pall. to high environmental salinity. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 165:250-260. [PMID: 30199796 DOI: 10.1016/j.ecoenv.2018.09.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2018] [Revised: 08/28/2018] [Accepted: 09/01/2018] [Indexed: 05/25/2023]
Abstract
The remediation and subsequent use of saline-alkaline land are of great significance to ecological environment construction and sustainable agricultural development. Iris halophila Pall. is a salt-tolerant medicinal and ornamental plant, which has good application prospects in the ecological construction of saline-alkaline land; therefore, study of the molecular mechanisms of salt tolerance in I. halophila has important theoretical and practical value. To evaluate the molecular mechanism of the response of I. halophila to salt toxicity, I. halophila seedlings were treated with salt (300 mM NaCl) and subjected to deep RNA sequencing. The clean reads were obtained and assembled into 297,188 unigenes. Among them, 1120 and 100 salt-responsive genes were identified in I. halophila shoots and roots, respectively. Among them, the key flavonoid and lignin biosynthetic genes, hormone signaling genes, sodium/potassium ion transporter genes, and transcription factors were analyzed and summarized. Quantitative reverse-transcription PCR analysis strengthened the reliability of the RNA sequencing results. This work provides an overview of the transcriptomic responses to salt toxicity in I. halophila and identifies the responsive genes that may contribute to its reduced salt toxicity. These results lay an important foundation for further study of the molecular mechanisms of salt tolerance in I. halophila and related species.
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Affiliation(s)
- Qingquan Liu
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China; The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Nanjing 210014, China
| | - Jun Tang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China; The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Nanjing 210014, China; Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Weilin Wang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China; The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Nanjing 210014, China
| | - Yongxia Zhang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China; The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Nanjing 210014, China
| | - Haiyan Yuan
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China; The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Nanjing 210014, China
| | - Suzhen Huang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China; The Jiangsu Provincial Platform for Conservation and Utilization of Agricultural Germplasm, Nanjing 210014, China.
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Gautier F, Eliášová K, Leplé JC, Vondráková Z, Lomenech AM, Le Metté C, Label P, Costa G, Trontin JF, Teyssier C, Lelu-Walter MA. Repetitive somatic embryogenesis induced cytological and proteomic changes in embryogenic lines of Pseudotsuga menziesii [Mirb.]. BMC PLANT BIOLOGY 2018; 18:164. [PMID: 30097018 PMCID: PMC6086078 DOI: 10.1186/s12870-018-1337-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 05/31/2018] [Indexed: 05/06/2023]
Abstract
BACKGROUND To explore poorly understood differences between primary and subsequent somatic embryogenic lines of plants, we induced secondary (2ry) and tertiary (3ry) lines from cotyledonary somatic embryos (SEs) of two Douglas-fir genotypes: SD4 and TD17. The 2ry lines exhibited significantly higher embryogenic potential (SE yields) than the 1ry lines initiated from zygotic embryos (SD4, 2155 vs 477; TD17, 240 vs 29 g- 1 f.w.). Moreover, we observed similar differences in yield between 2ry and 3ry lines of SD4 (2400 vs 3921 g- 1 f.w.). To elucidate reasons for differences in embryogenic potential induced by repetitive somatic embryogenesis we then compared 2ry vs 1ry and 2ry vs 3ry lines at histo-cytological (using LC-MS/MS) and proteomic levels. RESULTS Repetitive somatic embryogenesis dramatically improved the proliferating lines' cellular organization (genotype SD4's most strongly). Frequencies of singulated, bipolar SEs and compact polyembryogenic centers with elongated suspensors and apparently cleavable embryonal heads increased in 2ry and (even more) 3ry lines. Among 2300-2500 identified proteins, 162 and 228 were classified significantly differentially expressed between 2ry vs 1ry and 3ry vs 2ry lines, respectively, with special emphasis on "Proteolysis" and "Catabolic process" Gene Ontology categories. Strikingly, most of the significant proteins (> 70%) were down-regulated in 2ry relative to 1ry lines, but up-regulated in 3ry relative to 2ry lines, revealing a down-up pattern of expression. GO category enrichment analyses highlighted the opposite adjustments of global protein patterns, particularly for processes involved in chitin catabolism, lignin and L-phenylalanine metabolism, phenylpropanoid biosynthesis, oxidation-reduction, and response to karrikin. Sub-Network Enrichment Analyses highlighted interactions between significant proteins and both plant growth regulators and secondary metabolites after first (especially jasmonic acid, flavonoids) and second (especially salicylic acid, abscisic acid, lignin) embryogenesis cycles. Protein networks established after each induction affected the same "Plant development" and "Defense response" biological processes, but most strongly after the third cycle, which could explain the top embryogenic performance of 3ry lines. CONCLUSIONS This first report of cellular and molecular changes after repetitive somatic embryogenesis in conifers shows that each cycle enhanced the structure and singularization of EMs through modulation of growth regulator pathways, thereby improving the lines' embryogenic status.
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Affiliation(s)
- Florian Gautier
- BioForA, INRA, ONF, F-45075 Orléans, France
- SylvaLIM, University Limoges, F-78060 Limoges, France
| | - Kateřina Eliášová
- Institute of Experimental Botany of the Czech Academy of Sciences, Rozvojová 263, 165 02 Praha, 6-Lysolaje Czech Republic
| | - Jean-Charles Leplé
- BioForA, INRA, ONF, F-45075 Orléans, France
- BIOGECO, INRA, University Bordeaux, F-33610 Cestas, France
| | - Zuzana Vondráková
- Institute of Experimental Botany of the Czech Academy of Sciences, Rozvojová 263, 165 02 Praha, 6-Lysolaje Czech Republic
| | - Anne-Marie Lomenech
- Plateforme Protéome, Centre de Génomique Fonctionnelle, University Bordeaux, F-33000 Bordeaux, France
| | | | - Philippe Label
- University Clermont Auvergne, INRA, PIAF, F-63000 Clermont–Ferrand, France
| | - Guy Costa
- SylvaLIM, University Limoges, F-78060 Limoges, France
| | - Jean-François Trontin
- Pôle Biotechnologie et Sylviculture Avancée, FCBA, Campus Forêt-Bois de Pierroton, F-33610 Cestas, France
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Agut B, Pastor V, Jaques JA, Flors V. Can Plant Defence Mechanisms Provide New Approaches for the Sustainable Control of the Two-Spotted Spider Mite Tetranychus urticae? Int J Mol Sci 2018; 19:ijms19020614. [PMID: 29466295 PMCID: PMC5855836 DOI: 10.3390/ijms19020614] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 02/02/2018] [Accepted: 02/18/2018] [Indexed: 11/16/2022] Open
Abstract
Tetranychus urticae (T. urticae) Koch is a cosmopolitan, polyphagous mite which causes economic losses in both agricultural and ornamental plants. Some traits of T. urticae hamper its management, including a short life cycle, arrhenotokous parthenogenesis, its haplodiploid sex determination system, and its extraordinary ability to adapt to different hosts and environmental conditions. Currently, the use of chemical and biological control are the major control methods used against this mite. In recent years, some studies have focused on plant defence mechanisms against herbivores. Various families of plant compounds (such as flavonoids, glucosinolates, or acyl sugars) have been shown to behave as acaricides. Plants can be induced upon appropriate stimuli to increase their resistance against spider mites. This knowledge, together with the understanding of mechanisms by which T. urticae detoxifies and adapts to pesticides, may complement the control of this pest. Herein, we describe plant volatile compounds (VOCs) with repellent activity, and new findings about defence priming against spider mites, which interfere with the T. urticae performance. The use of VOCs and defence priming can be integrated into current management practices and reduce the damage caused by T. urticae in the field by implementing new, more sustainable crop management tools.
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Affiliation(s)
- Blas Agut
- Departament de Ciències Agràries i del Medi Natural. Campus del Riu Sec, Metabolic Integration and Cell Signalling Group, Universitat Jaume I (UJI), E-12071-Castelló de la Plana, Spain.
- Departament de Ciències Agràries i del Medi Natural, Unitat Associada d'Entomologia IVIA-UJI, Universitat Jaume I (UJI), Campus del Riu Sec, E-12071-Castelló de la Plana, Spain.
| | - Victoria Pastor
- Departament de Ciències Agràries i del Medi Natural. Campus del Riu Sec, Metabolic Integration and Cell Signalling Group, Universitat Jaume I (UJI), E-12071-Castelló de la Plana, Spain.
| | - Josep A Jaques
- Departament de Ciències Agràries i del Medi Natural, Unitat Associada d'Entomologia IVIA-UJI, Universitat Jaume I (UJI), Campus del Riu Sec, E-12071-Castelló de la Plana, Spain.
| | - Victor Flors
- Departament de Ciències Agràries i del Medi Natural. Campus del Riu Sec, Metabolic Integration and Cell Signalling Group, Universitat Jaume I (UJI), E-12071-Castelló de la Plana, Spain.
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24
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Roeschlin RA, Favaro MA, Chiesa MA, Alemano S, Vojnov AA, Castagnaro AP, Filippone MP, Gmitter FG, Gadea J, Marano MR. Resistance to citrus canker induced by a variant of Xanthomonas citri ssp. citri is associated with a hypersensitive cell death response involving autophagy-associated vacuolar processes. MOLECULAR PLANT PATHOLOGY 2017; 18:1267-1281. [PMID: 27647752 PMCID: PMC6638218 DOI: 10.1111/mpp.12489] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 07/25/2016] [Accepted: 08/31/2016] [Indexed: 05/14/2023]
Abstract
Xanthomonas citri ssp. citri (X. citri) is the causal agent of Asiatic citrus canker, a disease that seriously affects most commercially important Citrus species worldwide. We have identified previously a natural variant, X. citri AT , that triggers a host-specific defence response in Citrus limon. However, the mechanisms involved in this canker disease resistance are unknown. In this work, the defence response induced by X. citri AT was assessed by transcriptomic, physiological and ultrastructural analyses, and the effects on bacterial biofilm formation were monitored in parallel. We show that X. citri AT triggers a hypersensitive response associated with the interference of biofilm development and arrest of bacterial growth in C. limon. This plant response involves an extensive transcriptional reprogramming, setting in motion cell wall reinforcement, the oxidative burst and the accumulation of salicylic acid (SA) and phenolic compounds. Ultrastructural analyses revealed subcellular changes involving the activation of autophagy-associated vacuolar processes. Our findings show the activation of SA-dependent defence in response to X. citri AT and suggest a coordinated regulation between the SA and flavonoid pathways, which is associated with autophagy mechanisms that control pathogen invasion in C. limon. Furthermore, this defence response protects C. limon plants from disease on subsequent challenges by pathogenic X. citri. This knowledge will allow the rational exploitation of the plant immune system as a biotechnological approach for the management of the disease.
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Affiliation(s)
- Roxana A. Roeschlin
- Instituto de Biología Molecular y Celular de Rosario (IBR)–Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET)Área Virología, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario (UNR), Ocampo y Esmeralda s/nRosarioS2000FHNArgentina
| | - María A. Favaro
- Instituto de Biología Molecular y Celular de Rosario (IBR)–Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET)Área Virología, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario (UNR), Ocampo y Esmeralda s/nRosarioS2000FHNArgentina
| | - María A. Chiesa
- Instituto de Biología Molecular y Celular de Rosario (IBR)–Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET)Área Virología, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario (UNR), Ocampo y Esmeralda s/nRosarioS2000FHNArgentina
| | - Sergio Alemano
- Laboratorio de Fisiología Vegetal, Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico‐Químicas y NaturalesUniversidad Nacional de Río Cuarto, Ruta 36 Km. 601Río Cuarto X5804ZABCórdobaArgentina
| | - Adrián A. Vojnov
- Instituto de Ciencia y Tecnología Dr. Cesar MilsteinFundación Pablo Cassará‐CONICET, Saladillo 2468Ciudad de Buenos AiresC1440FFXArgentina
| | - Atilio P. Castagnaro
- Instituto de Tecnología Agroindustrial del Noroeste Argentino (ITA‐NOA)Estación Experimental Agroindustrial Obispo Colombres (EEAOC)‐CONICET, Av. William Cross 3150Las TalitasTucumánT4101XACArgentina
| | - María P. Filippone
- Instituto de Tecnología Agroindustrial del Noroeste Argentino (ITA‐NOA)Estación Experimental Agroindustrial Obispo Colombres (EEAOC)‐CONICET, Av. William Cross 3150Las TalitasTucumánT4101XACArgentina
| | - Frederick G. Gmitter
- Citrus Research and Education Center (CREC)University of Florida, 700 Experiment Station Rd.Lake AlfredFL33850USA
| | - José Gadea
- Instituto de Biología Molecular y Celular de Plantas (IBMCP)Universidad Politécnica de Valencia (UPV)‐Consejo Superior de Investigaciones Científicas (CSIC), Ciudad Politécnica de la Innovación (CPI), Ed. 8E, C/Ingeniero Fausto Elio s/nValencia46022Spain
| | - María R. Marano
- Instituto de Biología Molecular y Celular de Rosario (IBR)–Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET)Área Virología, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario (UNR), Ocampo y Esmeralda s/nRosarioS2000FHNArgentina
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25
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Santos ICD, Almeida AAFD, Pirovani CP, Costa MGC, Silva MFDGFD, Bellete BS, Freschi L, Soares Filho W, Coelho Filho MA, Gesteira ADS. Differential accumulation of flavonoids and phytohormones resulting from the canopy/rootstock interaction of citrus plants subjected to dehydration/rehydration. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2017; 119:147-158. [PMID: 28866236 DOI: 10.1016/j.plaphy.2017.08.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2017] [Revised: 08/10/2017] [Accepted: 08/21/2017] [Indexed: 05/08/2023]
Abstract
Water scarcity can elicit drastic changes in plant metabolic and hormonal regulation, which may be of fundamental importance to stress tolerance. The study of plant the metabolic alterations in response to water deficit, especially the effects of the rootstocks level, is important to elucidate the mechanisms associated to drought tolerance. To verify the influence of rootstock and grafting on the tolerance to drought in citrus plants, we analyzed the growth, phytohormone levels and flavonoid profiles in grafted and ungrafted citrus plants subjected to different soil water regimes on plant status (well-watered, moderate drought and severe drought and rehydrated) under field conditions. The experiments were conducted under field conditions in the Brazilian Agricultural Research Corporation (EMBRAPA), Cruz das Almas, BA, Brazil. Water deficit reduced the total leaf area per plant in all canopy/rootstock combinations. Self-grafting reduce root volume, area and length when compared to ungrafted plants. Drought-induced increases in salicylic acid and abscisic acid associated with concomitant reductions in indoleacetic acid were observed in most canopy/rootstock combinations. However, plants with 'Sunki Maravilha' rootstocks exhibited the most pronounced changes in hormonal levels upon drought stress. Associated to these hormonal changes, drought also significantly affected flavonoid content and profile in both leaves and roots of the distinct citrus combinations. Glycosylated (GFs) and polimethoxylated flavonoids were predominantly found in leaves, whereas prenylated coumarins were found in the roots. Leaf levels of GFs (vicenin, F11, rutin and rhoifolin) were particularly modulated by drought in plants with 'Rangpur Santa Cruz' lime rootstock, whereas root levels of prenylated coumarins were most regulated by drought in plants with the 'Sunki Maravilha' root system. Taken together, these data indicate that the impacts of water deficit restriction on growth, hormonal balance and flavonoid profiles significantly varies depending on the canopy/rootstock combinations.
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Affiliation(s)
- Ivanildes C Dos Santos
- Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz, Campus Soane Nazaré de Andrade, Rodovia Jorge Amado, km 16, 45662-900, Ilhéus, BA, Brazil
| | - Alex-Alan Furtado de Almeida
- Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz, Campus Soane Nazaré de Andrade, Rodovia Jorge Amado, km 16, 45662-900, Ilhéus, BA, Brazil.
| | - Carlos P Pirovani
- Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz, Campus Soane Nazaré de Andrade, Rodovia Jorge Amado, km 16, 45662-900, Ilhéus, BA, Brazil
| | - Márcio Gilberto Cardoso Costa
- Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz, Campus Soane Nazaré de Andrade, Rodovia Jorge Amado, km 16, 45662-900, Ilhéus, BA, Brazil
| | - Maria Fatima das Graças Fernandes da Silva
- Departamento de Química, Laboratório de Produtos Naturais, Universidade Federal de São Carlos, Rodovia Washington Luís, km 235 - SP-310, 13565-905, São Carlos, São Paulo, Brazil
| | - Barbara Sayuri Bellete
- Departamento de Química, Laboratório de Produtos Naturais, Universidade Federal de São Carlos, Rodovia Washington Luís, km 235 - SP-310, 13565-905, São Carlos, São Paulo, Brazil
| | - Luciano Freschi
- Departamento de Botânica, Universidade de São Paulo, São Paulo, 05508-090, Brazil
| | - Walter Soares Filho
- Embrapa Mandioca e Fruticultura, Rua Embrapa s/n, CP 007, Cruz das Almas, BA, Brazil
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26
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Zhan X, Shen Q, Wang X, Hong Y. The Sulfoquinovosyltransferase-like Enzyme SQD2.2 is Involved in Flavonoid Glycosylation, Regulating Sugar Metabolism and Seed Setting in Rice. Sci Rep 2017; 7:4685. [PMID: 28680100 PMCID: PMC5498572 DOI: 10.1038/s41598-017-04002-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 05/08/2017] [Indexed: 12/20/2022] Open
Abstract
Seed setting is an important trait that contributes to seed yield and relies greatly on starch accumulation. In this study, a sulfoquinovosyl transferase-like protein, designated as SQD2.2 involved in seed setting and flavonoid accumulation, was identified and characterized in rice. Rice SQD2.2 is localized to the cytoplasm, and the SQD2.2 transcript was highest in leaves. Rice SQD2.2-overexpressing (OE) plants exhibited a decreased seed setting rate and diminished tiller number simultaneously with an increased glycosidic flavonoid level compared with wild-type (WT) plants. SQD2.2 catalyzes the glycosylation of apigenin to produce apigenin 7-O-glucoside using uridine diphosphate-glucose (UDPG) as a sugar donor, but it failed to compensate for sulfoquinovosyldiacylglycerol (SQDG) synthesis in the Arabidopsis sqd2 mutant. Furthermore, apigenin 7-O-glucoside inhibited starch synthase (SS) activity in a concentration-dependent manner, and SQD2.2-OE plants exhibited reduced SS activity accompanied by a significant reduction in starch levels and an elevation in soluble sugar levels relative to WT plants. Both adenosine diphosphate-glucose (ADPG) and UDPG levels in SQD2.2-OE plants were notably lower than those in WT plants. Taken together, rice SQD2.2 exhibits a novel role in flavonoid synthesis and plays an important role in mediating sugar allocation between primary and secondary metabolism in rice.
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Affiliation(s)
- Xinqiao Zhan
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
| | - Qingwen Shen
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
| | - Xuemin Wang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
| | - Yueyun Hong
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China.
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27
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Zhuang Y, Tripp EA. The draft genome of Ruellia speciosa (Beautiful Wild Petunia: Acanthaceae). DNA Res 2017; 24:179-192. [PMID: 28431014 PMCID: PMC5397612 DOI: 10.1093/dnares/dsw054] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 11/16/2016] [Accepted: 11/17/2016] [Indexed: 11/13/2022] Open
Abstract
The genus Ruellia (Wild Petunias; Acanthaceae) is characterized by an enormous diversity of floral shapes and colours manifested among closely related species. Using Illumina platform, we reconstructed the draft genome of Ruellia speciosa, with a scaffold size of 1,021 Mb (or ∼1.02 Gb) and an N50 size of 17,908 bp, spanning ∼93% of the estimated genome (∼1.1 Gb). The draft assembly predicted 40,124 gene models and phylogenetic analyses of four key enzymes involved in anthocyanin colour production [flavanone 3-hydroxylase (F3H), flavonoid 3'-hydroxylase (F3'H), flavonoid 3',5'-hydroxylase (F3'5'H), and dihydroflavonol 4-reductase (DFR)] found that most angiosperms here sampled harboured at least one copy of F3H, F3'H, and DFR. In contrast, fewer than one-half (but including R. speciosa) harboured a copy of F3'5'H, supporting observations that blue flowers and/or fruits, which this enzyme is required for, are less common among flowering plants. Ka/Ks analyses of duplicated copies of F3'H and DFR in R. speciosa suggested purifying selection in the former but detected evidence of positive selection in the latter. The genome sequence and annotation of R. speciosa represents only one of only four families sequenced in the large and important Asterid clade of flowering plants and, as such, will facilitate extensive future research on this diverse group, particularly with respect to floral evolution.
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Affiliation(s)
- Yongbin Zhuang
- Department of Ecology and Evolutionary Biology, University of Colorado, UCB 334, Boulder, CO 80309, USA
- Museum of Natural History, University of Colorado, UCB 350, Boulder, CO 80309, USA
| | - Erin A. Tripp
- Department of Ecology and Evolutionary Biology, University of Colorado, UCB 334, Boulder, CO 80309, USA
- Museum of Natural History, University of Colorado, UCB 350, Boulder, CO 80309, USA
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28
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Zou B, Wan D, Li R, Han X, Li G, Wang R. Calmodulin-binding protein CBP60g functions as a negative regulator in Arabidopsis anthocyanin accumulation. PLoS One 2017; 12:e0173129. [PMID: 28253311 PMCID: PMC5333885 DOI: 10.1371/journal.pone.0173129] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 02/15/2017] [Indexed: 11/18/2022] Open
Abstract
Anthocyanins, a kind of flavonoid, normally accumulate in the flowers and fruits and make them colorful. Anthocyanin accumulation is regulated via the different temporal and spatial expression of anthocyanin regulatory and biosynthetic genes. CBP60g, a calmodulin binding protein, has previously been shown to have a role in pathogen resistance, drought tolerance and ABA sensitivity. In this study, we found that CBP60g repressed anthocyanin accumulation induced by drought, sucrose and kinetin. The expression pattern of CBP60g was in accordance with the anthocyanin accumulation tissues. Real-time qPCR analysis revealed that the anthocyanin biosynthetic genes CHS, CHI and DFR, as well as two members of MBW complex, PAP1, a MYB transcription factor, and TT8, a bHLH transcription factor, were down regulated by CBP60g.
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Affiliation(s)
- Bo Zou
- College of Life Sciences, Inner Mongolia Agricultural University, Hohhot, P. R. China
| | - Dongli Wan
- College of Life Sciences, Inner Mongolia Agricultural University, Hohhot, P. R. China
- Institute of Grassland Research, Chinese Academy of Agricultural Sciences, Hohhot, P. R. China
| | - Ruili Li
- College of Life Sciences, Inner Mongolia Agricultural University, Hohhot, P. R. China
- Wulanchabu Center for Disease Control and Prevention, Jining, P. R. China
| | - Xiaomin Han
- College of Life Sciences, Inner Mongolia Agricultural University, Hohhot, P. R. China
- Department of Histology and Embryology, Baotou Medical College, Baotou, P. R. China
| | - Guojing Li
- College of Life Sciences, Inner Mongolia Agricultural University, Hohhot, P. R. China
| | - Ruigang Wang
- College of Life Sciences, Inner Mongolia Agricultural University, Hohhot, P. R. China
- * E-mail:
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29
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Versluys M, Tarkowski ŁP, Van den Ende W. Fructans As DAMPs or MAMPs: Evolutionary Prospects, Cross-Tolerance, and Multistress Resistance Potential. FRONTIERS IN PLANT SCIENCE 2017; 7:2061. [PMID: 28123393 PMCID: PMC5225100 DOI: 10.3389/fpls.2016.02061] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 12/26/2016] [Indexed: 05/19/2023]
Abstract
This perspective paper proposes that endogenous apoplastic fructans in fructan accumulating plants, released after stress-mediated cellular leakage, or increased by exogenous application, can act as damage-associated molecular patterns (DAMPs), priming plant innate immunity through ancient receptors and defense pathways that most probably evolved to react on microbial fructans acting as microbe-associated molecular patterns (MAMPs). The proposed model is placed in an evolutionary perspective. How this type of DAMP signaling may contribute to cross-tolerance and multistress resistance effects in plants is discussed. Besides apoplastic ATP, NAD and fructans, apoplastic polyamines, secondary metabolites, and melatonin may be considered potential players in DAMP-mediated stress signaling. It is proposed that mixtures of DAMP priming formulations hold great promise as natural and sustainable alternatives for toxic agrochemicals.
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Schulz E, Tohge T, Zuther E, Fernie AR, Hincha DK. Flavonoids are determinants of freezing tolerance and cold acclimation in Arabidopsis thaliana. Sci Rep 2016; 6:34027. [PMID: 27658445 PMCID: PMC5034326 DOI: 10.1038/srep34027] [Citation(s) in RCA: 137] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Accepted: 09/06/2016] [Indexed: 12/15/2022] Open
Abstract
In plants from temperate climates such as Arabidopsis thaliana low, non-freezing temperatures lead to increased freezing tolerance in a process termed cold acclimation. This process is accompanied by massive changes in gene expression and in the content of primary metabolites and lipids. In addition, most flavonols and anthocyanins accumulate upon cold exposure, along with most transcripts encoding transcription factors and enzymes of the flavonoid biosynthetic pathway. However, no evidence for a functional role of flavonoids in plant freezing tolerance has been shown. Here, we present a comprehensive analysis using qRT-PCR for transcript, LC-MS for flavonoid and GC-MS for primary metabolite measurements, and an electrolyte leakage assay to determine freezing tolerance of 20 mutant lines in two Arabidopsis accessions that are affected in different steps of the flavonoid biosynthetic pathway. This analysis provides evidence for a functional role of flavonoids in plant cold acclimation. The accumulation of flavonoids in the activation tagging mutant line pap1-D improved, while reduced flavonoid content in different knock-out mutants impaired leaf freezing tolerance. Analysis of the different knock-out mutants suggests redundancy of flavonoid structures, as the lack of flavonols or anthocyanins could be compensated by other compound classes.
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Affiliation(s)
- Elisa Schulz
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, D-14476 Potsdam, Germany
| | - Takayuki Tohge
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, D-14476 Potsdam, Germany
| | - Ellen Zuther
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, D-14476 Potsdam, Germany
| | - Alisdair R. Fernie
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, D-14476 Potsdam, Germany
| | - Dirk K. Hincha
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, D-14476 Potsdam, Germany
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Chunthabur S, Sakuanrung S, Wongwarat T, Sanitchon J, Pattanagul W, Theerakulp P. Changes in Anthocyanin Content and Expression of Anthocyanin Synthesis Genes in Seedlings of Black Glutinous Rice in Response to Salt Stress. ACTA ACUST UNITED AC 2016. [DOI: 10.3923/ajps.2016.56.65] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Methyl Jasmonate: An Alternative for Improving the Quality and Health Properties of Fresh Fruits. Molecules 2016; 21:molecules21060567. [PMID: 27258240 PMCID: PMC6273056 DOI: 10.3390/molecules21060567] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 04/19/2016] [Accepted: 04/21/2016] [Indexed: 12/11/2022] Open
Abstract
Methyl jasmonate (MeJA) is a plant growth regulator belonging to the jasmonate family. It plays an important role as a possible airborne signaling molecule mediating intra- and inter-plant communications and modulating plant defense responses, including antioxidant systems. Most assessments of this compound have dealt with post-harvest fruit applications, demonstrating induced plant resistance against the detrimental impacts of storage (chilling injuries and pathogen attacks), enhancing secondary metabolites and antioxidant activity. On the other hand, the interactions between MeJA and other compounds or technological tools for enhancing antioxidant capacity and quality of fruits were also reviewed. The pleiotropic effects of MeJA have raisen numerous as-yet unanswered questions about its mode of action. The aim of this review was endeavored to clarify the role of MeJA on improving pre- and post-harvest fresh fruit quality and health properties. Interestingly, the influence of MeJA on human health will be also discussed.
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Poudel AN, Zhang T, Kwasniewski M, Nakabayashi R, Saito K, Koo AJ. Mutations in jasmonoyl-L-isoleucine-12-hydroxylases suppress multiple JA-dependent wound responses in Arabidopsis thaliana. Biochim Biophys Acta Mol Cell Biol Lipids 2016; 1861:1396-1408. [PMID: 26968098 DOI: 10.1016/j.bbalip.2016.03.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 02/19/2016] [Accepted: 03/06/2016] [Indexed: 12/17/2022]
Abstract
Plants rapidly perceive tissue damage, such as that inflicted by insects, and activate several key defense responses. The importance of the fatty acid-derived hormone jasmonates (JA) in dictating these wound responses has been recognized for many years. However, important features pertaining to the regulation of the JA pathway are still not well understood. One key unknown is the inactivation mechanism of the JA pathway and its relationship with plant response to wounding. Arabidopsis cytochrome P450 enzymes in the CYP94 clade metabolize jasmonoyl-L-isoleucine (JA-Ile), a major metabolite of JA responsible for many biological effects attributed to the JA signaling pathway; thus, CYP94s are expected to contribute to the attenuation of JA-Ile-dependent wound responses. To directly test this, we created the double and triple knock-out mutants of three CYP94 genes, CYP94B1, CYP94B3, and CYP94C1. The mutations blocked the oxidation steps and caused JA-Ile to accumulate 3-4-fold the WT levels in the wounded leaves. Surprisingly, over accumulation of JA-Ile did not lead to a stronger wound response. On the contrary, the mutants displayed a series of symptoms reminiscent of JA-Ile deficiency, including resistance to wound-induced growth inhibition, decreased anthocyanin and trichomes, and increased susceptibility to insects. The mutants, however, responded normally to exogenous JA treatments, indicating that JA perception or signaling pathways were intact. Untargeted metabolite analyses revealed >40% reduction in wound-inducible metabolites in the mutants. These observations raise questions about the current JA signaling model and point toward a more complex model perhaps involving JA derivatives and/or feedback mechanisms. This article is part of a Special Issue entitled: Plant Lipid Biology edited by Kent D. Chapman and Ivo Feussner.
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Affiliation(s)
- Arati N Poudel
- Division of Plant Sciences, University of Missouri, Columbia, MO, 65211, USA; Interdisciplinary Plant Group, University of Missouri, Columbia, MO, 65211, USA.
| | - Tong Zhang
- Division of Biochemistry, University of Missouri, Columbia, MO, 65211, USA; Interdisciplinary Plant Group, University of Missouri, Columbia, MO, 65211, USA.
| | - Misha Kwasniewski
- Division of Plant Sciences, University of Missouri, Columbia, MO, 65211, USA.
| | - Ryo Nakabayashi
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan.
| | - Kazuki Saito
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan; Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8675, Japan.
| | - Abraham J Koo
- Division of Biochemistry, University of Missouri, Columbia, MO, 65211, USA; Interdisciplinary Plant Group, University of Missouri, Columbia, MO, 65211, USA.
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Francisco M, Joseph B, Caligagan H, Li B, Corwin JA, Lin C, Kerwin R, Burow M, Kliebenstein DJ. The Defense Metabolite, Allyl Glucosinolate, Modulates Arabidopsis thaliana Biomass Dependent upon the Endogenous Glucosinolate Pathway. FRONTIERS IN PLANT SCIENCE 2016; 7:774. [PMID: 27313596 PMCID: PMC4887508 DOI: 10.3389/fpls.2016.00774] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Accepted: 05/17/2016] [Indexed: 05/18/2023]
Abstract
Glucosinolates (GSLs) play an important role in plants as direct mediators of biotic and abiotic stress responses. Recent work is beginning to show that the GSLs can also inducing complex defense and growth networks. However, the physiological significance of these GSL-induced responses and the molecular mechanisms by which GSLs are sensed and/or modulate these responses are not understood. To identify these potential mechanisms within the plant and how they may relate to the endogenous GSLs, we tested the regulatory effect of exogenous allyl GSL application on growth and defense metabolism across sample of Arabidopsis thaliana accessions. We found that application of exogenous allyl GSL had the ability to initiate changes in plant biomass and accumulation of defense metabolites that genetically varied across accessions. This growth effect was related to the allyl GSL side-chain structure. Utilizing this natural variation and mutants in genes within the GSL pathway we could show that the link between allyl GSL and altered growth responses are dependent upon the function of known genes controlling the aliphatic GSL pathway.
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Affiliation(s)
- Marta Francisco
- Department of Plant Sciences, University of CaliforniaDavis, CA, USA
- Group of Genetics, Breeding and Biochemistry of Brassicas, Department of Plant Genetics, Misión Biológica de Galicia, Spanish Council for Scientific ResearchPontevedra, Spain
| | - Bindu Joseph
- Department of Plant Sciences, University of CaliforniaDavis, CA, USA
| | - Hart Caligagan
- Department of Plant Sciences, University of CaliforniaDavis, CA, USA
| | - Baohua Li
- Department of Plant Sciences, University of CaliforniaDavis, CA, USA
| | - Jason A. Corwin
- Department of Plant Sciences, University of CaliforniaDavis, CA, USA
| | - Catherine Lin
- Department of Plant Sciences, University of CaliforniaDavis, CA, USA
| | - Rachel Kerwin
- Department of Plant Sciences, University of CaliforniaDavis, CA, USA
| | - Meike Burow
- DynaMo Center of Excellence, Copenhagen Plant Science Centre, University of CopenhagenFrederiksberg, Denmark
| | - Daniel J. Kliebenstein
- Department of Plant Sciences, University of CaliforniaDavis, CA, USA
- DynaMo Center of Excellence, Copenhagen Plant Science Centre, University of CopenhagenFrederiksberg, Denmark
- *Correspondence: Daniel J. Kliebenstein
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Ogo Y, Mori T, Nakabayashi R, Saito K, Takaiwa F. Transgenic rice seed expressing flavonoid biosynthetic genes accumulate glycosylated and/or acylated flavonoids in protein bodies. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:95-106. [PMID: 26438413 PMCID: PMC4682426 DOI: 10.1093/jxb/erv429] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Plant-specialized (or secondary) metabolites represent an important source of high-value chemicals. In order to generate a new production platform for these metabolites, an attempt was made to produce flavonoids in rice seeds. Metabolome analysis of these transgenic rice seeds using liquid chromatography-photodiode array-quadrupole time-of-flight mass spectrometry was performed. A total of 4392 peaks were detected in both transgenic and non-transgenic rice, 20-40% of which were only detected in transgenic rice. Among these, 82 flavonoids, including 37 flavonols, 11 isoflavones, and 34 flavones, were chemically assigned. Most of the flavonols and isoflavones were O-glycosylated, while many flavones were O-glycosylated and/or C-glycosylated. Several flavonoids were acylated with malonyl, feruloyl, acetyl, and coumaroyl groups. These glycosylated/acylated flavonoids are thought to have been biosynthesized by endogenous rice enzymes using newly synthesized flavonoids whose biosynthesis was catalysed by exogenous enzymes. The subcellular localization of the flavonoids differed depending on the class of aglycone and the glycosylation/acylation pattern. Therefore, flavonoids with the intended aglycones were efficiently produced in rice seeds via the exogenous enzymes introduced, while the flavonoids were variously glycosylated/acylated by endogenous enzymes. The results suggest that rice seeds are useful not only as a production platform for plant-specialized metabolites such as flavonoids but also as a tool for expanding the diversity of flavonoid structures, providing novel, physiologically active substances.
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Affiliation(s)
- Yuko Ogo
- Transgenic Crop Research and Development Centre, National Institute of Agrobiological Sciences (NIAS), Tsukuba, Ibaraki, Japan
| | - Tetsuya Mori
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan
| | - Ryo Nakabayashi
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan
| | - Kazuki Saito
- RIKEN Center for Sustainable Resource Science, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan Graduate School of Pharmaceutical Sciences, Chiba University, 1-8-1 Chuo-ku, Chiba 260-8675, Japan
| | - Fumio Takaiwa
- Transgenic Crop Research and Development Centre, National Institute of Agrobiological Sciences (NIAS), Tsukuba, Ibaraki, Japan
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Bajaj D, Das S, Upadhyaya HD, Ranjan R, Badoni S, Kumar V, Tripathi S, Gowda CLL, Sharma S, Singh S, Tyagi AK, Parida SK. A Genome-wide Combinatorial Strategy Dissects Complex Genetic Architecture of Seed Coat Color in Chickpea. FRONTIERS IN PLANT SCIENCE 2015; 6:979. [PMID: 26635822 PMCID: PMC4647070 DOI: 10.3389/fpls.2015.00979] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2015] [Accepted: 10/26/2015] [Indexed: 05/29/2023]
Abstract
The study identified 9045 high-quality SNPs employing both genome-wide GBS- and candidate gene-based SNP genotyping assays in 172, including 93 cultivated (desi and kabuli) and 79 wild chickpea accessions. The GWAS in a structured population of 93 sequenced accessions detected 15 major genomic loci exhibiting significant association with seed coat color. Five seed color-associated major genomic loci underlying robust QTLs mapped on a high-density intra-specific genetic linkage map were validated by QTL mapping. The integration of association and QTL mapping with gene haplotype-specific LD mapping and transcript profiling identified novel allelic variants (non-synonymous SNPs) and haplotypes in a MATE secondary transporter gene regulating light/yellow brown and beige seed coat color differentiation in chickpea. The down-regulation and decreased transcript expression of beige seed coat color-associated MATE gene haplotype was correlated with reduced proanthocyanidins accumulation in the mature seed coats of beige than light/yellow brown seed colored desi and kabuli accessions for their coloration/pigmentation. This seed color-regulating MATE gene revealed strong purifying selection pressure primarily in LB/YB seed colored desi and wild Cicer reticulatum accessions compared with the BE seed colored kabuli accessions. The functionally relevant molecular tags identified have potential to decipher the complex transcriptional regulatory gene function of seed coat coloration and for understanding the selective sweep-based seed color trait evolutionary pattern in cultivated and wild accessions during chickpea domestication. The genome-wide integrated approach employed will expedite marker-assisted genetic enhancement for developing cultivars with desirable seed coat color types in chickpea.
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Affiliation(s)
- Deepak Bajaj
- National Institute of Plant Genome ResearchNew Delhi, India
| | - Shouvik Das
- National Institute of Plant Genome ResearchNew Delhi, India
| | - Hari D. Upadhyaya
- International Crops Research Institute for the Semi-Arid TropicsTelangana, India
| | - Rajeev Ranjan
- National Institute of Plant Genome ResearchNew Delhi, India
| | - Saurabh Badoni
- National Institute of Plant Genome ResearchNew Delhi, India
| | - Vinod Kumar
- National Research Centre on Plant BiotechnologyNew Delhi, India
| | - Shailesh Tripathi
- Division of Genetics, Indian Agricultural Research InstituteNew Delhi, India
| | | | - Shivali Sharma
- International Crops Research Institute for the Semi-Arid TropicsTelangana, India
| | - Sube Singh
- International Crops Research Institute for the Semi-Arid TropicsTelangana, India
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Agut B, Gamir J, Jaques JA, Flors V. Tetranychus urticae-triggered responses promote genotype-dependent conspecific repellence or attractiveness in citrus. THE NEW PHYTOLOGIST 2015; 207:790-804. [PMID: 25771705 DOI: 10.1111/nph.13357] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Accepted: 02/03/2015] [Indexed: 05/04/2023]
Abstract
The citrus rootstocks sour orange and Cleopatra mandarin display differential resistance against Tetranychus urticae. Sour orange plants support reduced oviposition, growth rates and damage compared with Cleopatra mandarin plants. Jasmonic acid signalling and flavonoid accumulation have been revealed as key mechanisms for the enhanced resistance of sour orange plants. In this study, we observed that the release of T. urticae herbivore-induced plant volatiles (HIPVs) from sour orange plants has a marked repellent effect on conspecific mites associated with the production of the terpenes α-ocimene, α-farnesene, pinene and d-limonene, and the green leaf volatile 4-hydroxy-4-methyl-2-pentanone. By contrast, T. urticae HIPVs from Cleopatra mandarin plants promote conspecific mite attraction associated with an increase in (2-butoxyethoxy) ethanol, benzaldehyde and methyl salicylate levels. HIPVs released from sour orange plants following T. urticae infestation induce resistance in Cleopatra mandarin plants, thereby reducing oviposition rates and stimulating the oxylipin biosynthetic gene lipoxygenase2 (LOX2). Cleopatra HIPVs do not affect the response to T. urticae of these rootstocks. We conclude that sour orange plants promote herbivore-induced resistance in Cleopatra mandarin plants and, despite the weak basal resistance of these rootstocks, herbivore resistance can be induced through the combination of HIPVs, such as α-ocimene and d-limonene.
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Affiliation(s)
- Blas Agut
- Departament de Ciències Agràries i del Medi Natural, Unitat Associada d'Entomologia IVIA-UJI, Universitat Jaume I (UJI), Campus del Riu Sec, E-12071, Castelló de la Plana, Spain
- Departament de Ciències Agràries i del Medi Natural, Metabolic Integration and Cell Signalling Group, Universitat Jaume I (UJI), Campus del Riu Sec, E-12071, Castelló de la Plana, Spain
| | - Jordi Gamir
- Departament de Ciències Agràries i del Medi Natural, Metabolic Integration and Cell Signalling Group, Universitat Jaume I (UJI), Campus del Riu Sec, E-12071, Castelló de la Plana, Spain
| | - Josep A Jaques
- Departament de Ciències Agràries i del Medi Natural, Unitat Associada d'Entomologia IVIA-UJI, Universitat Jaume I (UJI), Campus del Riu Sec, E-12071, Castelló de la Plana, Spain
| | - Victor Flors
- Departament de Ciències Agràries i del Medi Natural, Metabolic Integration and Cell Signalling Group, Universitat Jaume I (UJI), Campus del Riu Sec, E-12071, Castelló de la Plana, Spain
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Hill CB, Taylor JD, Edwards J, Mather D, Langridge P, Bacic A, Roessner U. Detection of QTL for metabolic and agronomic traits in wheat with adjustments for variation at genetic loci that affect plant phenology. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2015; 233:143-154. [PMID: 25711822 DOI: 10.1016/j.plantsci.2015.01.008] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Revised: 01/15/2015] [Accepted: 01/18/2015] [Indexed: 05/10/2023]
Abstract
Mapping of quantitative trait loci associated with levels of individual metabolites (mQTL) was combined with the mapping of agronomic traits to investigate the genetic basis of variation and co-variation in metabolites, agronomic traits, and plant phenology in a field-grown bread wheat population. Metabolome analysis was performed using liquid chromatography-mass spectrometry resulting in identification of mainly polar compounds, including secondary metabolites. A total of 558 metabolic features were obtained from the flag leaves of 179 doubled haploid lines, of which 197 features were putatively identified, mostly as alkaloids, flavonoids and phenylpropanoids. Coordinated genetic control was observed for several groups of metabolites, such as organic acids influenced by two loci on chromosome 7A. Five major phenology-related loci, which were introduced as cofactors in the analyses, differed in their impact upon metabolic and agronomic traits with QZad-aww-7A having more impact on the expression of both metabolite and agronomic QTL than Ppd-B1, Vrn-A1, Eps, and QZad-aww-7D. This QTL study validates the utility of combining agronomic and metabolomic traits as an approach to identify potential trait enhancement targets for breeding selection and reinforces previous results that demonstrate the importance of including plant phenology in the assessment of useful traits in this wheat mapping population.
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Affiliation(s)
- Camilla B Hill
- Australian Centre for Plant Functional Genomics, School of Botany, The University of Melbourne, Victoria 3010, Australia.
| | - Julian D Taylor
- School of Agriculture, Food and Wine, Waite Research Institute, The University of Adelaide, PMB 1, Glen Osmond, South Australia 5064, Australia.
| | - James Edwards
- Australian Grain Technologies, Roseworthy Campus, Roseworthy, South Australia 5371, Australia.
| | - Diane Mather
- School of Agriculture, Food and Wine, Waite Research Institute, The University of Adelaide, PMB 1, Glen Osmond, South Australia 5064, Australia; Australian Centre for Plant Functional Genomics, The University of Adelaide, PMB1, Glen Osmond, South Australia 5064, Australia.
| | - Peter Langridge
- Australian Centre for Plant Functional Genomics, The University of Adelaide, PMB1, Glen Osmond, South Australia 5064, Australia.
| | - Antony Bacic
- Metabolomics Australia, School of Botany, The University of Melbourne, Victoria 3010, Australia; Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Victoria 3010, Australia; ARC Centre of Excellence in Plant Cell Walls, School of Botany, The University of Melbourne, Victoria 3010, Australia.
| | - Ute Roessner
- Australian Centre for Plant Functional Genomics, School of Botany, The University of Melbourne, Victoria 3010, Australia; Metabolomics Australia, School of Botany, The University of Melbourne, Victoria 3010, Australia.
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Wang Z, Tang J, Hu R, Wu P, Hou XL, Song XM, Xiong AS. Genome-wide analysis of the R2R3-MYB transcription factor genes in Chinese cabbage (Brassica rapa ssp. pekinensis) reveals their stress and hormone responsive patterns. BMC Genomics 2015; 16:17. [PMID: 25613160 PMCID: PMC4334723 DOI: 10.1186/s12864-015-1216-y] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Accepted: 01/02/2015] [Indexed: 12/11/2022] Open
Abstract
Background The MYB superfamily is one of the most abundant transcription factor (TF) families in plants. MYB proteins include highly conserved N-terminal MYB repeats (1R, R2R3, 3R, and atypical) and various C-terminal sequences that confer extensive functions. However, the functions of most MYB genes are unknown, and have been little studied in Chinese cabbage. Results Here, we analyzed 256 (55.2% of total MYBs) R2R3-MYB genes from Chinese cabbage (Brassica rapa ssp. pekinensis) and anchored them onto the 10 chromosomes and three subgenomes. The R2R3-, 3R- and atypical MYB proteins in Chinese cabbage formed 45 subgroups based on domain similarity and phylogenetic topology. Organization and syntenic analysis revealed the genomic distribution and collinear relationships of the R2R3-BrMYBs. Synonymous nucleotide substitution (Ka/Ks) analysis showed that the Chinese cabbage MYB DNA-binding domain is under strong purifying selection. Moreover, RNA-seq data revealed tissue-specific and distinct R2R3-BrMYB expression profiles, and quantitative real-time PCR (qPCR) analysis in leaves showed stress responsive expression and crosstalk with ABA-auxin signaling cascades. Conclusions In this study, we identified the largest MYB gene family in plants to date. Our results indicate that members of this superfamily may be involved in plant development, stress responses and leaf senescence, highlighting their functional diversity. Electronic supplementary material The online version of this article (doi:10.1186/s12864-015-1216-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Zhen Wang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Jun Tang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China. .,Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing, 210014, China.
| | - Rong Hu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Peng Wu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Xi-Lin Hou
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Xiao-Ming Song
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Ai-Sheng Xiong
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095, China.
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Tholl D. Biosynthesis and biological functions of terpenoids in plants. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2015; 148:63-106. [PMID: 25583224 DOI: 10.1007/10_2014_295] [Citation(s) in RCA: 249] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Terpenoids (isoprenoids) represent the largest and most diverse class of chemicals among the myriad compounds produced by plants. Plants employ terpenoid metabolites for a variety of basic functions in growth and development but use the majority of terpenoids for more specialized chemical interactions and protection in the abiotic and biotic environment. Traditionally, plant-based terpenoids have been used by humans in the food, pharmaceutical, and chemical industries, and more recently have been exploited in the development of biofuel products. Genomic resources and emerging tools in synthetic biology facilitate the metabolic engineering of high-value terpenoid products in plants and microbes. Moreover, the ecological importance of terpenoids has gained increased attention to develop strategies for sustainable pest control and abiotic stress protection. Together, these efforts require a continuous growth in knowledge of the complex metabolic and molecular regulatory networks in terpenoid biosynthesis. This chapter gives an overview and highlights recent advances in our understanding of the organization, regulation, and diversification of core and specialized terpenoid metabolic pathways, and addresses the most important functions of volatile and nonvolatile terpenoid specialized metabolites in plants.
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Affiliation(s)
- Dorothea Tholl
- Department of Biological Sciences, Virginia Tech, 409 Latham Hall, 24061, Blacksburg, VA, USA,
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Kovinich N, Kayanja G, Chanoca A, Otegui MS, Grotewold E. Abiotic stresses induce different localizations of anthocyanins in Arabidopsis. PLANT SIGNALING & BEHAVIOR 2015; 10:e1027850. [PMID: 26179363 PMCID: PMC4622623 DOI: 10.1080/15592324.2015.1027850] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Anthocyanins are induced in plants in response to abiotic stresses such as drought, high salinity, excess light, and cold, where they often correlate with enhanced stress tolerance. Numerous roles have been proposed for anthocyanins induced during abiotic stresses including functioning as ROS scavengers, photoprotectants, and stress signals. We have recently found different profiles of anthocyanins in Arabidopsis (Arabidopsis thaliana) plants exposed to different abiotic stresses, suggesting that not all anthocyanins have the same function. Here, we discuss these findings in the context of other studies and show that anthocyanins induced in Arabidopsis in response to various abiotic stresses have different localizations at the organ and tissue levels. These studies provide a basis to clarify the role of particular anthocyanin species during abiotic stress.
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Affiliation(s)
- Nik Kovinich
- Center for Applied Plant Sciences (CAPS); The Ohio State University; Columbus, OH USA
- Department of Molecular Genetics; The Ohio State University; Columbus, OH USA
| | - Gilbert Kayanja
- Center for Applied Plant Sciences (CAPS); The Ohio State University; Columbus, OH USA
- Department of Molecular Genetics; The Ohio State University; Columbus, OH USA
| | - Alexandra Chanoca
- Department of Botany; University of Wisconsin-Madison; Madison, WI USA
| | - Marisa S Otegui
- Department of Botany; University of Wisconsin-Madison; Madison, WI USA
- Department of Genetics; University of Wisconsin-Madison; Madison, WI USA
| | - Erich Grotewold
- Center for Applied Plant Sciences (CAPS); The Ohio State University; Columbus, OH USA
- Department of Molecular Genetics; The Ohio State University; Columbus, OH USA
- Correspondence to: Erich Grotewold;
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Gamir J, Sánchez-Bel P, Flors V. Molecular and physiological stages of priming: how plants prepare for environmental challenges. PLANT CELL REPORTS 2014; 33:1935-49. [PMID: 25113544 DOI: 10.1007/s00299-014-1665-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Revised: 07/18/2014] [Accepted: 07/21/2014] [Indexed: 05/18/2023]
Abstract
Being sessile organisms, plants must respond to various challenges in the environment. The priming process consists of three clear stages. The first stage includes all the cellular changes in the absence of the challenge so-called pre-challenge priming stage. These changes are expected to be rather subtle, affecting the preparation of the plant to properly manage subsequent responses to pathogens with no major fitness costs. Most of the research that has been conducted at this stage has been dedicated to the study of changes in gene expression and protein phosphorylation. However, the metabolic changes that occur during the pre-challenge priming stage are poorly understood. The second stage affects the early to late stages of the defence response, which occurs after the interaction with a pathogen has been established. Most studies involving priming are dedicated to the molecular events that take place during this stage. Most studies have shown that defence priming is strongly hormonally regulated; however, there is also evidence of the involvement of phenolic derivative compounds and many other secondary metabolites, leading to stronger and faster plant responses. The third priming phase ranges from long lasting defence priming to trans-generational acquired resistance. Long-term metabolic transitions, that occur in the offspring of primed plants, remain to be elucidated. Here we review existing information in the literature that relates to the metabolic changes that occur during all three defence priming stages and highlight the metabolic transitions that are associated with the stimulation of priming and the characteristics of the pathogens whenever possible.
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Affiliation(s)
- J Gamir
- Metabolic Integration and Cell Signaling Group, Plant Physiology Section, Department of CAMN, Universitat Jaume I, Avd Vicente Sos Baynat, 12071, Castellón, Spain
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Agut B, Gamir J, Jacas JA, Hurtado M, Flors V. Different metabolic and genetic responses in citrus may explain relative susceptibility to Tetranychus urticae. PEST MANAGEMENT SCIENCE 2014; 70:1728-41. [PMID: 24375985 DOI: 10.1002/ps.3718] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Revised: 11/26/2013] [Accepted: 12/20/2013] [Indexed: 05/08/2023]
Abstract
BACKGROUND Life history parameters of the phytophagous spider mite Tetranychus urticae in citrus depend on the rootstock where the cultivar is grafted. To unveil the mechanisms responsible for this effect, the authors have carried out comparative experiments of T. urticae performance on two citrus rootstocks, the highly T. urticae-sensitive Cleopatra mandarin and the more tolerant sour orange. RESULTS Sour orange showed reduced leaf damage symptoms, supported lower mite populations and reduced oviposition rates compared with Cleopatra mandarin. Hormonal, metabolomic and gene expression analyses of the main defence pathways suggest a relevant role of the oxylipin and the flavonoid pathways in the response against T. urticae. Sour orange showed an increased activity of the JA pathway, which was hardly active in the most susceptible rootstock. Moreover, treatments with the LOX inhibitor Phenidone abolished the enhanced tolerance of sour orange. Therefore, oxylipin-dependent defence seems to be rootstock dependent. The metabolomic analysis showed the importance of the flavonoid pathway, which is implicated in the interaction between plants and their environment. CONCLUSION The findings suggest that sour-orange enhanced tolerance to spider mites can be sustained by a combination of pre-existing and induced responses depending on high levels of flavonoids and a fast and effective activation of the oxylipin pathway. © 2013 Society of Chemical Industry.
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Affiliation(s)
- Blas Agut
- Departament de Ciències Agràries i del Medi Natural, Unitat Associada d'Entomologia IVIA-UJI, Universitat Jaume I, Castelló de la Plana, Spain; Metabolic Integration and Cell Signalling Group, Departament de Ciències Agràries i del Medi Natural, Universitat Jaume I, Castelló de la Plana, Spain
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Margaria P, Ferrandino A, Caciagli P, Kedrina O, Schubert A, Palmano S. Metabolic and transcript analysis of the flavonoid pathway in diseased and recovered Nebbiolo and Barbera grapevines (Vitis vinifera L.) following infection by Flavescence dorée phytoplasma. PLANT, CELL & ENVIRONMENT 2014; 37:2183-200. [PMID: 24689527 DOI: 10.1111/pce.12332] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Revised: 03/11/2014] [Accepted: 03/14/2014] [Indexed: 05/05/2023]
Abstract
Flavescence dorée phytoplasma (FDp) infections seriously affect production and survival of grapevine. We analysed the changes in the flavonoid pathway occurring in two red cultivars, the highly susceptible Barbera and the less susceptible Nebbiolo, following FDp infection. A combination of metabolic and transcript analyses was used to quantify flavonoid compounds and expression of a set of genes involved in their biosynthesis. Quantification of anthocyanins, flavonols, proanthocyanidins and related biosynthetic enzymes was performed over the vegetative season, at four time points, on healthy, infected and recovered plants. A strong activation of anthocyanin accumulation was observed in infected Barbera leaves, while the response was less marked in Nebbiolo. Proanthocyanidins also accumulated mainly in infected Barbera leaves, even if basal proanthocyanidin concentration was higher in healthy and recovered Nebbiolo. Biochemical data were supported by transcript analysis: genes of the stem flavonoid pathway and of the anthocyanin and proanthocyanidin branches were expressed at a higher level in infected than in healthy plants, with a different magnitude between the two cultivars. Based on our results, we hypothesize that flavonoid accumulation is a physiological consequence of FD infection without affecting phytoplasma multiplication, although proanthocyanidin accumulation could help repel further infection by the insect vector.
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Affiliation(s)
- Paolo Margaria
- Istituto di Virologia Vegetale, CNR, 10135, Torino, Italy
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Onkokesung N, Reichelt M, van Doorn A, Schuurink RC, van Loon JJ, Dicke M. Modulation of flavonoid metabolites in Arabidopsis thaliana through overexpression of the MYB75 transcription factor: role of kaempferol-3,7-dirhamnoside in resistance to the specialist insect herbivore Pieris brassicae. JOURNAL OF EXPERIMENTAL BOTANY 2014; 65:2203-17. [PMID: 24619996 PMCID: PMC3991749 DOI: 10.1093/jxb/eru096] [Citation(s) in RCA: 110] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Anthocyanins and flavonols are secondary metabolites that can function in plant defence against herbivores. In Arabidopsis thaliana, anthocyanin and flavonol biosynthesis are regulated by MYB transcription factors. Overexpression of MYB75 (oxMYB75) in Arabidopsis results in increasing anthocyanin and flavonol levels which enhances plant resistance to generalist caterpillars. However, how these metabolites affect specialist herbivores has remained unknown. Performance of a specialist aphid (Brevicoryne brassicae) was unaffected after feeding on oxMYB75 plants, whereas a specialist caterpillar (Pieris brassicae) gained significantly higher body mass when feeding on this plant. An increase in anthocyanin and total flavonol glycoside levels correlated negatively with the body mass of caterpillars fed on oxMYB75 plants. However, a significant reduction of kaempferol-3,7-dirhamnoside (KRR) corresponded to an increased susceptibility of oxMYB75 plants to caterpillar feeding. Pieris brassicae caterpillars also grew less on an artificial diet containing KRR or on oxMYB75 plants that were exogenously treated with KRR, supporting KRR's function in direct defence against this specialist caterpillar. The results show that enhancing the activity of the anthocyanin pathway in oxMYB75 plants results in re-channelling of quercetin/kaempferol metabolites which has a negative effect on the accumulation of KRR, a novel defensive metabolite against a specialist caterpillar.
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Affiliation(s)
- Nawaporn Onkokesung
- Laboratory of Entomology, Wageningen University, PO Box 8031, 6700EH Wageningen, The Netherlands
| | - Michael Reichelt
- Department of Biochemistry, Max Planck Institute for Chemical Ecology, Hans-Knöll Straβe 8, D-07745 Jena, Germany
| | - Arjen van Doorn
- Keygene NV, Agro Business Park 90, 6708OW, Wageningen, The Netherlands
| | - Robert C. Schuurink
- Plant Physiology, Swammerdam Institute for Life Sciences, University of Amsterdam, Science Park 904, 1098XH Amsterdam, The Netherlands
| | - Joop J.A. van Loon
- Laboratory of Entomology, Wageningen University, PO Box 8031, 6700EH Wageningen, The Netherlands
| | - Marcel Dicke
- Laboratory of Entomology, Wageningen University, PO Box 8031, 6700EH Wageningen, The Netherlands
- * To whom correspondence should be addressed. E-mail:
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Kliebenstein DJ. Orchestration of plant defense systems: genes to populations. TRENDS IN PLANT SCIENCE 2014; 19:250-255. [PMID: 24486317 DOI: 10.1016/j.tplants.2014.01.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2013] [Revised: 11/21/2013] [Accepted: 01/08/2014] [Indexed: 06/03/2023]
Abstract
Research over the past decades has made immense progress in identifying some genes and mechanisms underlying plant defense against biotic organisms. The recent movement towards systems biology approaches has increased mechanistic knowledge, revealing a need for understanding how all the genes and mechanisms integrate to create a response to any given biotic interaction. This begins with evidence that diverse molecular patterns converge, suggesting that the plant perceives signals not the interacting species. These signals then coordinate across regulatory networks via molecular interactions and cause non-cell autonomous responses in neighboring and systemic cells. Finally, the identification of transporters is showing that plant defenses are harmonized across tissues and even show the potential for coordination across individuals within a population.
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Affiliation(s)
- Daniel J Kliebenstein
- Department of Plant Sciences, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA; DynaMo Center of Excellence, University of Copenhagen, Thorvaldsensvej 40, DK-1871, Frederiksberg C, Denmark.
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Kang JH, McRoberts J, Shi F, Moreno JE, Jones AD, Howe GA. The flavonoid biosynthetic enzyme chalcone isomerase modulates terpenoid production in glandular trichomes of tomato. PLANT PHYSIOLOGY 2014; 164:1161-74. [PMID: 24424324 PMCID: PMC3938611 DOI: 10.1104/pp.113.233395] [Citation(s) in RCA: 122] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Accepted: 01/13/2014] [Indexed: 05/20/2023]
Abstract
Flavonoids and terpenoids are derived from distinct metabolic pathways but nevertheless serve complementary roles in mediating plant interactions with the environment. Here, we show that glandular trichomes of the anthocyanin free (af) mutant of cultivated tomato (Solanum lycopersicum) fail to accumulate both flavonoids and terpenoids. This pleiotropic metabolic deficiency was associated with loss of resistance to native populations of coleopteran herbivores under field conditions. We demonstrate that Af encodes an isoform (SlCHI1) of the flavonoid biosynthetic enzyme chalcone isomerase (CHI), which catalyzes the conversion of naringenin chalcone to naringenin and is strictly required for flavonoid production in multiple tissues of tomato. Expression of the wild-type SlCHI1 gene from its native promoter complemented the anthocyanin deficiency in af. Unexpectedly, the SlCHI1 transgene also complemented the defect in terpenoid production in glandular trichomes. Our results establish a key role for SlCHI1 in flavonoid production in tomato and reveal a link between CHI1 and terpenoid production. Metabolic coordination of the flavonoid and terpenoid pathways may serve to optimize the function of trichome glands in dynamic environments.
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Schulz P, Jansseune K, Degenkolbe T, Méret M, Claeys H, Skirycz A, Teige M, Willmitzer L, Hannah MA. Poly(ADP-ribose)polymerase activity controls plant growth by promoting leaf cell number. PLoS One 2014; 9:e90322. [PMID: 24587323 PMCID: PMC3938684 DOI: 10.1371/journal.pone.0090322] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Accepted: 01/28/2014] [Indexed: 12/22/2022] Open
Abstract
A changing global environment, rising population and increasing demand for biofuels are challenging agriculture and creating a need for technologies to increase biomass production. Here we demonstrate that the inhibition of poly (ADP-ribose) polymerase activity is a promising technology to achieve this under non-stress conditions. Furthermore, we investigate the basis of this growth enhancement via leaf series and kinematic cell analysis as well as single leaf transcriptomics and plant metabolomics under non-stress conditions. These data indicate a regulatory function of PARP within cell growth and potentially development. PARP inhibition enhances growth of Arabidopsis thaliana by enhancing the cell number. Time course single leaf transcriptomics shows that PARP inhibition regulates a small subset of genes which are related to growth promotion, cell cycle and the control of metabolism. This is supported by metabolite analysis showing overall changes in primary and particularly secondary metabolism. Taken together the results indicate a versatile function of PARP beyond its previously reported roles in controlling plant stress tolerance and thus can be a useful target for enhancing biomass production.
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Affiliation(s)
- Philipp Schulz
- Bayer CropScience NV, Innovation Center, Zwijnaarde, Belgium
- Department of Molecular Systems Biology (MOSYS), University of Vienna, Vienna, Austria
| | - Karel Jansseune
- Bayer CropScience NV, Innovation Center, Zwijnaarde, Belgium
| | - Thomas Degenkolbe
- Max-Planck-Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Michaël Méret
- Max-Planck-Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Hannes Claeys
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Department of Plant Systems Biology, VIB, Ghent, Belgium
| | - Aleksandra Skirycz
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Department of Plant Systems Biology, VIB, Ghent, Belgium
| | - Markus Teige
- Department of Molecular Systems Biology (MOSYS), University of Vienna, Vienna, Austria
| | - Lothar Willmitzer
- Max-Planck-Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Matthew A. Hannah
- Bayer CropScience NV, Innovation Center, Zwijnaarde, Belgium
- * E-mail:
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