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Anwar A, Wang Y, Chen M, Zhang S, Wang J, Feng Y, Xue Y, Zhao M, Su W, Chen R, Song S. Zero-valent iron (nZVI) nanoparticles mediate SlERF1 expression to enhance cadmium stress tolerance in tomato. JOURNAL OF HAZARDOUS MATERIALS 2024; 468:133829. [PMID: 38394894 DOI: 10.1016/j.jhazmat.2024.133829] [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: 10/16/2023] [Revised: 01/25/2024] [Accepted: 02/16/2024] [Indexed: 02/25/2024]
Abstract
Cadmium (Cd) pollution threatens plant physiological and biochemical activities and crop production. Significant progress has been made in characterizing how nanoparticles affect Cd stress tolerance; however, the molecular mechanism of nZVI nanoparticles in Cd stress remains largely uncharacterized. Plants treated with nZVI and exposed to Cd had increased antioxidant capacity and reduced Cd accumulation in plant tissues. The nZVI treatment differentially affected the expression of genes involved in plant environmental responses, including those associated with the ERF transcription factor. SlEFR1 was upregulated by Cd stress in nZVI-treated plants when compared with the control and the predicted protein-protein interactions suggested SlERF1 interacts with proteins associated with plant hormone signaling pathway and related to stress. Yeast overexpressing SlEFR1 grew faster after Cd exposure and significantly had higher Cd stress tolerance when compared with empty vector controls. These results suggest that nZVI induces Cd stress tolerance by activating SlERF1 expression to improve plant growth and nutrient accumulation. Our study reveals the molecular mechanism of Cd stress tolerance for improved plant growth and will support new research on overcoming Cd stress and improving vegetable crop production.
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Affiliation(s)
- Ali Anwar
- College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Yudan Wang
- College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Mengqing Chen
- College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Shuaiwei Zhang
- College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Jinmiao Wang
- College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Yunqiang Feng
- College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Yanxu Xue
- College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Mingfeng Zhao
- College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Wei Su
- College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Riyuan Chen
- College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Shiwei Song
- College of Horticulture, South China Agricultural University, Guangzhou, China.
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2
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Cheng C, Zhao X, Yang H, Coldea TE, Zhao H. Mechanism of selenite tolerance during barley germination: A combination of tissue selenium metabolism alterations and ascorbate-glutathione cycle modulation. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 205:108189. [PMID: 37979575 DOI: 10.1016/j.plaphy.2023.108189] [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: 08/28/2023] [Revised: 10/16/2023] [Accepted: 11/09/2023] [Indexed: 11/20/2023]
Abstract
Selenite is widely used to increase Selenium (Se) content in cereals, however excessive selenite may be toxic to plant growth. In this study, barley was malted to elucidate the action mechanism of selenite in the generation and detoxification of oxidative toxicity. The results showed that high doses (600 μM) of selenite radically increased oxidative stress by the elevated accumulation of superoxide and malondialdehyde, leading to phenotypic symptoms of selenite-induced toxicity like stunted growth. Barley tolerates selenite through a combination of mechanisms, including altering Se distribution in barley, accelerating Se efflux, and increasing the activity of some essential antioxidant enzymes. Low doses (150 μM) of selenite improved barley biomass, respiratory rate, root vigor, and maintained the steady-state equilibrium between reactive oxygen species (ROS) and antioxidant enzyme. Selenite-induced proline may act as a biosignal to mediate the response of barley to Se stress. Furthermore, low doses of selenite increased the glutathione (GSH) and ascorbate (AsA) concentrations by mediating the ascorbate-glutathione cycle (AsA-GSH cycle). GSH intervention and dimethyl selenide volatilization appear to be the primary mechanisms of selenite tolerance in barley. Thus, results from this study will provide a better understanding of the mechanisms of selenite tolerance in crops.
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Affiliation(s)
- Chao Cheng
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Xiujie Zhao
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
| | - Huirong Yang
- College of Food Science and Technology, Southwest Minzu University, Chengdu 610041, China
| | - Teodora Emilia Coldea
- Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine of Cluj-Napoca, Cluj-Napoca 400372, Romania; Centre for Technology Transfer-BioTech, 64 Calea Florești, 400509 Cluj-Napoca, Romania
| | - Haifeng Zhao
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Research Institute for Food Nutrition and Human Health, Guangzhou 510640, China.
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Sevilla F, Martí MC, De Brasi-Velasco S, Jiménez A. Redox regulation, thioredoxins, and glutaredoxins in retrograde signalling and gene transcription. JOURNAL OF EXPERIMENTAL BOTANY 2023; 74:5955-5969. [PMID: 37453076 PMCID: PMC10575703 DOI: 10.1093/jxb/erad270] [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: 04/13/2023] [Accepted: 07/12/2023] [Indexed: 07/18/2023]
Abstract
Integration of reactive oxygen species (ROS)-mediated signal transduction pathways via redox sensors and the thiol-dependent signalling network is of increasing interest in cell biology for their implications in plant growth and productivity. Redox regulation is an important point of control in protein structure, interactions, cellular location, and function, with thioredoxins (TRXs) and glutaredoxins (GRXs) being key players in the maintenance of cellular redox homeostasis. The crosstalk between second messengers, ROS, thiol redox signalling, and redox homeostasis-related genes controls almost every aspect of plant development and stress response. We review the emerging roles of TRXs and GRXs in redox-regulated processes interacting with other cell signalling systems such as organellar retrograde communication and gene expression, especially in plants during their development and under stressful environments. This approach will cast light on the specific role of these proteins as redox signalling components, and their importance in different developmental processes during abiotic stress.
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Affiliation(s)
- Francisca Sevilla
- Abiotic Stress, Production and Quality Laboratory, Department of Stress Biology and Plant Pathology, CEBAS-CSIC, Murcia, Spain
| | - Maria Carmen Martí
- Abiotic Stress, Production and Quality Laboratory, Department of Stress Biology and Plant Pathology, CEBAS-CSIC, Murcia, Spain
| | - Sabrina De Brasi-Velasco
- Abiotic Stress, Production and Quality Laboratory, Department of Stress Biology and Plant Pathology, CEBAS-CSIC, Murcia, Spain
| | - Ana Jiménez
- Abiotic Stress, Production and Quality Laboratory, Department of Stress Biology and Plant Pathology, CEBAS-CSIC, Murcia, Spain
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Decker D, Aubert J, Wilczynska M, Kleczkowski LA. Exploring Redox Modulation of Plant UDP-Glucose Pyrophosphorylase. Int J Mol Sci 2023; 24:ijms24108914. [PMID: 37240260 DOI: 10.3390/ijms24108914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Revised: 05/10/2023] [Accepted: 05/15/2023] [Indexed: 05/28/2023] Open
Abstract
UDP-glucose (UDPG) pyrophosphorylase (UGPase) catalyzes a reversible reaction, producing UDPG, which serves as an essential precursor for hundreds of glycosyltransferases in all organisms. In this study, activities of purified UGPases from sugarcane and barley were found to be reversibly redox modulated in vitro through oxidation by hydrogen peroxide or oxidized glutathione (GSSG) and through reduction by dithiothreitol or glutathione. Generally, while oxidative treatment decreased UGPase activity, a subsequent reduction restored the activity. The oxidized enzyme had increased Km values with substrates, especially pyrophosphate. The increased Km values were also observed, regardless of redox status, for UGPase cysteine mutants (Cys102Ser and Cys99Ser for sugarcane and barley UGPases, respectively). However, activities and substrate affinities (Kms) of sugarcane Cys102Ser mutant, but not barley Cys99Ser, were still prone to redox modulation. The data suggest that plant UGPase is subject to redox control primarily via changes in the redox status of a single cysteine. Other cysteines may also, to some extent, contribute to UGPase redox status, as seen for sugarcane enzymes. The results are discussed with respect to earlier reported details of redox modulation of eukaryotic UGPases and regarding the structure/function properties of these proteins.
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Affiliation(s)
- Daniel Decker
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, 90187 Umeå, Sweden
| | - Juliette Aubert
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, 90187 Umeå, Sweden
| | | | - Leszek A Kleczkowski
- Department of Plant Physiology, Umeå Plant Science Centre, Umeå University, 90187 Umeå, Sweden
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Lv X, Li Y, Chen R, Rui M, Wang Y. Stomatal Responses of Two Drought-Tolerant Barley Varieties with Different ROS Regulation Strategies under Drought Conditions. Antioxidants (Basel) 2023; 12:antiox12040790. [PMID: 37107165 PMCID: PMC10135251 DOI: 10.3390/antiox12040790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 03/14/2023] [Accepted: 03/20/2023] [Indexed: 04/29/2023] Open
Abstract
Drought stress is a major obstacle to agricultural production. Stomata are central to efforts to improve photosynthesis and water use. They are targets for manipulation to improve both processes and the balance between them. An in-depth understanding of stomatal behavior and kinetics is important for improving photosynthesis and the WUE of crops. In this study, a drought stress pot experiment was performed, and a transcriptome analysis of the leaves of three contrasting, cultivated barley genotypes Lumley (Lum, drought-tolerant), Golden Promise (GP, drought-sensitive), and Tadmor (Tad, drought-tolerant), generated by high-throughput sequencing, were compared. Lum exhibited a different WUE at the leaf and whole-plant levels and had greater CO2 assimilation, with a higher gs under drought stress. Interestingly, Lum showed a slower stomatal closure in response to a light-dark transition and significant differences compared to Tad in stomatal response to the exogenous application of ABA, H2O2, and CaCl2. A transcriptome analysis revealed that 24 ROS-related genes were indeed involved in drought response regulation, and impaired ABA-induced ROS accumulation in Lum was identified using ROS and antioxidant capacity measurements. We conclude that different stomatal ROS responses affect stomatal closure in barley, demonstrating different drought regulation strategies. These results provide valuable insight into the physiological and molecular basis of stomatal behavior and drought tolerance in barley.
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Affiliation(s)
- Xiachen Lv
- Institute of Crop Science, College of Agriculture and Biotechnology, Zijingang Campus, Zhejiang University, Hangzhou 310058, China
| | - Yihong Li
- Institute of Crop Science, College of Agriculture and Biotechnology, Zijingang Campus, Zhejiang University, Hangzhou 310058, China
| | - Rongjia Chen
- Institute of Crop Science, College of Agriculture and Biotechnology, Zijingang Campus, Zhejiang University, Hangzhou 310058, China
| | - Mengmeng Rui
- Institute of Crop Science, College of Agriculture and Biotechnology, Zijingang Campus, Zhejiang University, Hangzhou 310058, China
| | - Yizhou Wang
- Institute of Crop Science, College of Agriculture and Biotechnology, Zijingang Campus, Zhejiang University, Hangzhou 310058, China
- Zhejiang Provincial Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou 310058, China
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Sandalio LM, Collado-Arenal AM, Romero-Puertas MC. Deciphering peroxisomal reactive species interactome and redox signalling networks. Free Radic Biol Med 2023; 197:58-70. [PMID: 36642282 DOI: 10.1016/j.freeradbiomed.2023.01.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 12/19/2022] [Accepted: 01/12/2023] [Indexed: 01/15/2023]
Abstract
Plant peroxisomes are highly dynamic organelles with regard to metabolic pathways, number and morphology and participate in different metabolic processes and cell responses to their environment. Peroxisomes from animal and plant cells house a complex system of reactive oxygen species (ROS) production associated to different metabolic pathways which are under control of an important set of enzymatic and non enzymatic antioxidative defenses. Nitric oxide (NO) and its derivate reactive nitrogen species (RNS) are also produced in these organelles. Peroxisomes can regulate ROS and NO/RNS levels to allow their role as signalling molecules. The metabolism of other reactive species such as carbonyl reactive species (CRS) and sulfur reactive species (SRS) in peroxisomes and their relationship with ROS and NO have not been explored in depth. In this review, we define a peroxisomal reactive species interactome (PRSI), including all reactive species ROS, RNS, CRS and SRS, their interaction and effect on target molecules contributing to the dynamic redox/ROS homeostasis and plasticity of peroxisomes, enabling fine-tuned regulation of signalling networks associated with peroxisome-dependent H2O2. Particular attention will be paid to update the information available on H2O2-dependent peroxisomal retrograde signalling and to discuss a specific peroxisomal footprint.
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Affiliation(s)
- Luisa M Sandalio
- Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín (EEZ), Consejo Superior de Investigaciones Científicas (CSIC), C/ Profesor Albareda 1, 18008, Granada, Spain.
| | - Aurelio M Collado-Arenal
- Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín (EEZ), Consejo Superior de Investigaciones Científicas (CSIC), C/ Profesor Albareda 1, 18008, Granada, Spain
| | - María C Romero-Puertas
- Department of Biochemistry, Cell and Molecular Biology of Plants, Estación Experimental del Zaidín (EEZ), Consejo Superior de Investigaciones Científicas (CSIC), C/ Profesor Albareda 1, 18008, Granada, Spain
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Jardim-Messeder D, Caverzan A, Balbinott N, Menguer PK, Paiva ALS, Lemos M, Cunha JR, Gaeta ML, Costa M, Zamocky M, Saibo NJM, Silveira JAG, Margis R, Margis-Pinheiro M. Stromal Ascorbate Peroxidase ( OsAPX7) Modulates Drought Stress Tolerance in Rice ( Oryza sativa). Antioxidants (Basel) 2023; 12:antiox12020387. [PMID: 36829946 PMCID: PMC9952370 DOI: 10.3390/antiox12020387] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 01/26/2023] [Accepted: 02/02/2023] [Indexed: 02/09/2023] Open
Abstract
Chloroplast ascorbate peroxidases exert an important role in the maintenance of hydrogen peroxide levels in chloroplasts by using ascorbate as the specific electron donor. In this work, we performed a functional study of the stromal APX in rice (OsAPX7) and demonstrated that silencing of OsAPX7 did not impact plant growth, redox state, or photosynthesis parameters. Nevertheless, when subjected to drought stress, silenced plants (APX7i) show a higher capacity to maintain stomata aperture and photosynthesis performance, resulting in a higher tolerance when compared to non-transformed plants. RNA-seq analyses indicate that the silencing of OsAPX7 did not lead to changes in the global expression of genes related to reactive oxygen species metabolism. In addition, the drought-mediated induction of several genes related to the proteasome pathway and the down-regulation of genes related to nitrogen and carotenoid metabolism was impaired in APX7i plants. During drought stress, APX7i showed an up-regulation of genes encoding flavonoid and tyrosine metabolism enzymes and a down-regulation of genes related to phytohormones signal transduction and nicotinate and nicotinamide metabolism. Our results demonstrate that OsAPX7 might be involved in signaling transduction pathways related to drought stress response, contributing to the understanding of the physiological role of chloroplast APX isoforms in rice.
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Affiliation(s)
- Douglas Jardim-Messeder
- Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre 90010-150, RS, Brazil
- Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-590, RJ, Brazil
- Departamento de Genética, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-590, RJ, Brazil
| | - Andreia Caverzan
- Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Porto Alegre 90010-150, RS, Brazil
| | - Natalia Balbinott
- Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre 90010-150, RS, Brazil
- Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Porto Alegre 90010-150, RS, Brazil
| | - Paloma K. Menguer
- Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Porto Alegre 90010-150, RS, Brazil
| | - Ana L. S. Paiva
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza 60020-181, CE, Brazil
| | - Moaciria Lemos
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza 60020-181, CE, Brazil
| | - Juliana R. Cunha
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza 60020-181, CE, Brazil
| | - Marcos L. Gaeta
- Departamento de Botânica, Universidade Federal Rio Grande do Sul, Porto Alegre 90010-150, RS, Brazil
| | - Miguel Costa
- LEAF, TERRA, Instituto Superior de Agronomia, University of Lisbon, 1349-017 Lisboa, Portugal
| | - Marcel Zamocky
- Laboratory of Phylogenomic Ecology, Institute of Molecular Biology, Slovak Academy of Sciences, Dúbravská cesta 21, 84551 Bratislava, Slovakia
- Department of Chemistry, Institute of Biochemistry, University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190 Vienna, Austria
| | - Nelson J. M. Saibo
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, 2780-157 Oeiras, Portugal
| | - Joaquim A. G. Silveira
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza 60020-181, CE, Brazil
| | - Rogério Margis
- Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre 90010-150, RS, Brazil
- Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Porto Alegre 90010-150, RS, Brazil
| | - Márcia Margis-Pinheiro
- Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre 90010-150, RS, Brazil
- Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Porto Alegre 90010-150, RS, Brazil
- Correspondence:
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Yao Z, Rao Z, Hou S, Tian C, Liu CY, Yang X, Zhu G. The appropriate expression and coordination of glycolate oxidase and catalase are vital to the successful construction of the photorespiratory metabolic pathway. FRONTIERS IN PLANT SCIENCE 2022; 13:999757. [PMID: 36388585 PMCID: PMC9647076 DOI: 10.3389/fpls.2022.999757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 09/20/2022] [Indexed: 06/16/2023]
Abstract
Photorespiration has emerged as a hotspot in the evolution of photosynthesis owing to the energy loss during the process. To ensure the physiological functions of photorespiration such as light protection, H2O2 signaling, and stress resistance, separate the photorespiration glycolic acid flow, and minimize photorespiration loss, a balance must be maintained during the construction of photorespiratory metabolic branch. In this study, glycolate oxidase (GLO) and catalase (CAT) were introduced into potato (Solanum tuberosum) chloroplasts through the expression of fusion protein. Through the examination of phenotypic characteristics, photosynthesis, anatomical structure, and enzyme activity, the efficiency of the photorespiration pathway was demonstrated. The results showed that certain transgenic lines plants had shorter plant height and deformed leaves and tubers in addition to the favorable photosynthetic phenotypes of thicker leaves and larger and denser mesophyll cells. By Diaminobenzidine (DAB) staining analysis of the leaves, the intermediate H2O2 could not be decomposed in time to cause biomass decline and malformation, and the excessive glycolate shunt formed by the overexpression of the fusion protein affected other important physiological activities. Hence, the appropriate and coordinated expression of glycolate oxidase and catalase is essential for the establishment of photorespiration pathways in chloroplasts.
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Affiliation(s)
- Zhen Yao
- College of Horticulture and Gardening, Yangtze University, Jingzhou, China
| | - Zelai Rao
- College of Horticulture and Gardening, Yangtze University, Jingzhou, China
- School of Finance and Economics, Jimei University, Xiamen, China
| | - ShuWang Hou
- College of Horticulture and Gardening, Yangtze University, Jingzhou, China
| | - Changwei Tian
- College of Horticulture and Gardening, Yangtze University, Jingzhou, China
| | - Chun-Yan Liu
- College of Horticulture and Gardening, Yangtze University, Jingzhou, China
| | - Xiulan Yang
- Department of Medicine, Yangtze University, Jingzhou, China
| | - Guicai Zhu
- College of Horticulture and Gardening, Yangtze University, Jingzhou, China
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Effects of the Rhizosphere Fungus Cunninghamella bertholletiae on the Solanum lycopersicum Response to Diverse Abiotic Stresses. Int J Mol Sci 2022; 23:ijms23168909. [PMID: 36012179 PMCID: PMC9408995 DOI: 10.3390/ijms23168909] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 08/05/2022] [Accepted: 08/08/2022] [Indexed: 01/20/2023] Open
Abstract
This study examined the efficiency of fungal strain (Cunninghamella bertholletiae) isolated from the rhizosphere of Solanum lycopersicum to reduce symptoms of salinity, drought and heavy metal stresses in tomato plants. In vitro evaluation of C. bertholletiae demonstrated its ability to produce indole-3-Acetic Acid (IAA), ammonia and tolerate varied abiotic stresses on solid media. Tomato plants at 33 days’ old, inoculated with or without C. bertholletiae, were treated with 1.5% sodium chloride, 25% polyethylene glycol, 3 mM cadmium and 3 mM lead for 10 days, and the impact of C. bertholletiae on plant performance was investigated. Inoculation with C. bertholletiae enhanced plant biomass and growth attributes in stressed plants. In addition, C. bertholletiae modulated the physiochemical apparatus of stressed plants by raising chlorophyll, carotenoid, glucose, fructose, and sucrose contents, and reducing hydrogen peroxide, protein, lipid metabolism, amino acid, antioxidant activities, and abscisic acid. Gene expression analysis showed enhanced expression of SlCDF3 and SlICS genes and reduced expression of SlACCase, SlAOS, SlGRAS6, SlRBOHD, SlRING1, SlTAF1, and SlZH13 genes following C. bertholletiae application. In conclusion, our study supports the potential of C. bertholletiae as a biofertilizer to reduce plant damage, improve crop endurance and remediation under stress conditions.
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Bauduin S, Latini M, Belleggia I, Migliore M, Biancucci M, Mattioli R, Francioso A, Mosca L, Funck D, Trovato M. Interplay between Proline Metabolism and ROS in the Fine Tuning of Root-Meristem Size in Arabidopsis. PLANTS 2022; 11:plants11111512. [PMID: 35684285 PMCID: PMC9182721 DOI: 10.3390/plants11111512] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 06/01/2022] [Accepted: 06/02/2022] [Indexed: 12/24/2022]
Abstract
We previously reported that proline modulates root meristem size in Arabidopsis by controlling the ratio between cell division and cell differentiation. Here, we show that proline metabolism affects the levels of superoxide anion (O2•−) and hydrogen peroxide (H2O2), which, in turn, modulate root meristem size and root elongation. We found that hydrogen peroxide plays a major role in proline-mediated root elongation, and its effects largely overlap those induced by proline, influencing root meristem size, root elongation, and cell cycle. Though a combination of genetic and pharmacological evidence, we showed that the short-root phenotype of the proline-deficient p5cs1 p5cs2/P5CS2, an Arabidopsis mutant homozygous for p5cs1 and heterozygous for p5cs2, is caused by H2O2 accumulation and is fully rescued by an effective H2O2 scavenger. Furthermore, by studying Arabidopsis mutants devoid of ProDH activity, we disclosed the essential role of this enzyme in the modulation of root meristem size as the main enzyme responsible for H2O2 production during proline degradation. Proline itself, on the contrary, may not be able to directly control the levels of H2O2, although it seems able to enhance the enzymatic activity of catalase (CAT) and ascorbate peroxidase (APX), the two most effective scavengers of H2O2 in plant cells. We propose a model in which proline metabolism participates in a delicate antioxidant network to balance H2O2 formation and degradation and fine-tune root meristem size in Arabidopsis.
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Affiliation(s)
- Sara Bauduin
- Department of Biology and Biotechnology, Sapienza University of Rome, 00185 Rome, Italy; (S.B.); (M.L.); (I.B.); (M.M.); (M.B.); (R.M.)
| | - Martina Latini
- Department of Biology and Biotechnology, Sapienza University of Rome, 00185 Rome, Italy; (S.B.); (M.L.); (I.B.); (M.M.); (M.B.); (R.M.)
| | - Irene Belleggia
- Department of Biology and Biotechnology, Sapienza University of Rome, 00185 Rome, Italy; (S.B.); (M.L.); (I.B.); (M.M.); (M.B.); (R.M.)
| | - Marta Migliore
- Department of Biology and Biotechnology, Sapienza University of Rome, 00185 Rome, Italy; (S.B.); (M.L.); (I.B.); (M.M.); (M.B.); (R.M.)
| | - Marco Biancucci
- Department of Biology and Biotechnology, Sapienza University of Rome, 00185 Rome, Italy; (S.B.); (M.L.); (I.B.); (M.M.); (M.B.); (R.M.)
| | - Roberto Mattioli
- Department of Biology and Biotechnology, Sapienza University of Rome, 00185 Rome, Italy; (S.B.); (M.L.); (I.B.); (M.M.); (M.B.); (R.M.)
- Department of Biochemical Sciences, Sapienza University of Rome, 00185 Rome, Italy; (A.F.); (L.M.)
| | - Antonio Francioso
- Department of Biochemical Sciences, Sapienza University of Rome, 00185 Rome, Italy; (A.F.); (L.M.)
| | - Luciana Mosca
- Department of Biochemical Sciences, Sapienza University of Rome, 00185 Rome, Italy; (A.F.); (L.M.)
| | - Dietmar Funck
- Department of Biology, University of Konstanz, 78457 Konstanz, Germany;
| | - Maurizio Trovato
- Department of Biology and Biotechnology, Sapienza University of Rome, 00185 Rome, Italy; (S.B.); (M.L.); (I.B.); (M.M.); (M.B.); (R.M.)
- Correspondence: ; Tel.: +39-06-4991-2411
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Zhang Q, Dai X, Wang H, Wang F, Tang D, Jiang C, Zhang X, Guo W, Lei Y, Ma C, Zhang H, Li P, Zhao Y, Wang Z. Transcriptomic Profiling Provides Molecular Insights Into Hydrogen Peroxide-Enhanced Arabidopsis Growth and Its Salt Tolerance. FRONTIERS IN PLANT SCIENCE 2022; 13:866063. [PMID: 35463436 PMCID: PMC9019583 DOI: 10.3389/fpls.2022.866063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Accepted: 02/28/2022] [Indexed: 05/05/2023]
Abstract
Salt stress is an important environmental factor limiting plant growth and crop production. Plant adaptation to salt stress can be improved by chemical pretreatment. This study aims to identify whether hydrogen peroxide (H2O2) pretreatment of seedlings affects the stress tolerance of Arabidopsis thaliana seedlings. The results show that pretreatment with H2O2 at appropriate concentrations enhances the salt tolerance ability of Arabidopsis seedlings, as revealed by lower Na+ levels, greater K+ levels, and improved K+/Na+ ratios in leaves. Furthermore, H2O2 pretreatment improves the membrane properties by reducing the relative membrane permeability (RMP) and malonaldehyde (MDA) content in addition to improving the activities of antioxidant enzymes, including superoxide dismutase, and glutathione peroxidase. Our transcription data show that exogenous H2O2 pretreatment leads to the induced expression of cell cycle, redox regulation, and cell wall organization-related genes in Arabidopsis, which may accelerate cell proliferation, enhance tolerance to osmotic stress, maintain the redox balance, and remodel the cell walls of plants in subsequent high-salt environments.
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Affiliation(s)
- Qikun Zhang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Xiuru Dai
- State Key Laboratory of Crop Biology, College of Agronomic Sciences, Shandong Agricultural University, Tai’an, China
| | - Huanpeng Wang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Fanhua Wang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Dongxue Tang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Chunyun Jiang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
- Linyi Center for Disease Control and Prevention, Linyi, China
| | - Xiaoyan Zhang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Wenjing Guo
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Yuanyuan Lei
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Changle Ma
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Hui Zhang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Pinghua Li
- State Key Laboratory of Crop Biology, College of Agronomic Sciences, Shandong Agricultural University, Tai’an, China
| | - Yanxiu Zhao
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Zenglan Wang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
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12
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Srivastava S, Pandey SP, Singh P, Pradhan L, Pande V, Sane AP. Early wound-responsive cues regulate the expression of WRKY family genes in chickpea differently under wounded and unwounded conditions. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2022; 28:719-735. [PMID: 35592484 PMCID: PMC9110599 DOI: 10.1007/s12298-022-01170-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 02/05/2022] [Accepted: 03/22/2022] [Indexed: 06/15/2023]
Abstract
UNLABELLED Insect wounding activates a large number of signals that function coordinately to modulate gene expression and elicit defense responses. How each signal influences gene expression in absence of wounding is also important since it can shed light on changes occurring during the shift to wound response. Using simulated Helicoverpa armigera herbivory on chickpea, we had identified at least 14 WRKY genes that showed 5-50 fold increase in expression within 5-20 min of wounding. Our studies show that contrary to their collective effects upon wounding, individual chemical cues show distinct and often opposite effects in absence of wounding. In particular, jasmonic acid, a key early defense hormone, reduced transcripts of most WRKY genes by > 50% upon treatment of unwounded chickpea leaves as did salicylic acid. Neomycin (a JA biosynthesis inhibitor) delayed and also reduced early wound expression. H2O2 transiently activated several genes within 5-20 min by 5-8 fold while ethylene activated only a few WRKY genes by 2-5 fold. The summation of the individual effects of these chemical cues does not explain the strong increase in transcript levels upon wounding. Detailed studies of a 931 nt region of the CaWRKY41 promoter, show strong wound-responsive GUS expression in Arabidopsis even in presence of neomycin. Surprisingly its expression was lost in the coi1, ein2 and myc2myc3myc4 mutant backgrounds suggesting the requirement of intact ethylene and JA signaling pathways (dependent on MYCs) for wound-responsive expression. The studies highlight the complexity of gene regulation by different chemical cues in the presence and absence of wounding. SUPPLEMENTARY INFORMATION The online version contains Supplementary material available at 10.1007/s12298-022-01170-y.
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Affiliation(s)
- Shruti Srivastava
- Plant Gene Expression Lab, CSIR-National Botanical Research Institute, Lucknow, 226001 India
- Department of Biotechnology, Kumaun University, Nainital, 26300 India
| | - Saurabh Prakash Pandey
- Plant Gene Expression Lab, CSIR-National Botanical Research Institute, Lucknow, 226001 India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002 India
| | - Priya Singh
- Plant Gene Expression Lab, CSIR-National Botanical Research Institute, Lucknow, 226001 India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002 India
| | - Laxmipriya Pradhan
- Plant Gene Expression Lab, CSIR-National Botanical Research Institute, Lucknow, 226001 India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002 India
| | - Veena Pande
- Department of Biotechnology, Kumaun University, Nainital, 26300 India
| | - Aniruddha P Sane
- Plant Gene Expression Lab, CSIR-National Botanical Research Institute, Lucknow, 226001 India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002 India
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13
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Zentgraf U, Andrade-Galan AG, Bieker S. Specificity of H 2O 2 signaling in leaf senescence: is the ratio of H 2O 2 contents in different cellular compartments sensed in Arabidopsis plants? Cell Mol Biol Lett 2022; 27:4. [PMID: 34991444 PMCID: PMC8903538 DOI: 10.1186/s11658-021-00300-w] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 12/17/2021] [Indexed: 01/21/2023] Open
Abstract
Leaf senescence is an integral part of plant development and is driven by endogenous cues such as leaf or plant age. Developmental senescence aims to maximize the usage of carbon, nitrogen and mineral resources for growth and/or for the sake of the next generation. This requires efficient reallocation of the resources out of the senescing tissue into developing parts of the plant such as new leaves, fruits and seeds. However, premature senescence can be induced by severe and long-lasting biotic or abiotic stress conditions. It serves as an exit strategy to guarantee offspring in an unfavorable environment but is often combined with a trade-off in seed number and quality. In order to coordinate the very complex process of developmental senescence with environmental signals, highly organized networks and regulatory cues have to be in place. Reactive oxygen species, especially hydrogen peroxide (H2O2), are involved in senescence as well as in stress signaling. Here, we want to summarize the role of H2O2 as a signaling molecule in leaf senescence and shed more light on how specificity in signaling might be achieved. Altered hydrogen peroxide contents in specific compartments revealed a differential impact of H2O2 produced in different compartments. Arabidopsis lines with lower H2O2 levels in chloroplasts and cytoplasm point to the possibility that not the actual contents but the ratio between the two different compartments is sensed by the plant cells.
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Affiliation(s)
- Ulrike Zentgraf
- ZMBP (Centre of Plant Molecular Biology), University of Tübingen, Auf der Morgenstelle 32, 72076, Tübingen, Germany.
| | - Ana Gabriela Andrade-Galan
- ZMBP (Centre of Plant Molecular Biology), University of Tübingen, Auf der Morgenstelle 32, 72076, Tübingen, Germany
| | - Stefan Bieker
- ZMBP (Centre of Plant Molecular Biology), University of Tübingen, Auf der Morgenstelle 32, 72076, Tübingen, Germany
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14
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Gupta SK, Sharma M, Maurya VK, Deeba F, Pandey V. Effects of ethylenediurea (EDU) on apoplast and chloroplast proteome in two wheat varieties under high ambient ozone: an approach to investigate EDU's mode of action. PROTOPLASMA 2021; 258:1009-1028. [PMID: 33641010 DOI: 10.1007/s00709-021-01617-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 01/22/2021] [Indexed: 06/12/2023]
Abstract
Rising tropospheric ozone (O3) is a serious threat to plants and animals in the present climate change scenario. High tropospheric O3 has the capability to disrupt cellular organelles leading to impaired photosynthesis and significant yield reduction. Apoplast and chloroplast are two important cellular components in a plant system. Their proteomic response with ethylenediurea (EDU) treatment under tropospheric O3 has not been explored till date. EDU (an organic compound) protects plants exclusively against harmful O3 effects through activation of antioxidant defense mechanism. The present study investigated the mode of action of EDU (hereafter MAE) by identifying proteins involved in apoplast and chloroplast pathways. Two wheat varieties viz. Kundan and PBW 343 (hereafter K and P respectively) and three EDU treatments (0= control, 200, and 300 ppm) have been used for the study. In apoplast isolates, proteins such as superoxide dismutase (SOD), amino methyltransferase, catalase, and Germin-like protein have shown active role by maintaining antioxidant defense system under EDU treatment. Differential expression of these proteins leads to enhanced antioxidative defense mechanisms inside and outside the cell. Chloroplast proteins such as Rubisco, Ferredoxin NADP- reductase (FNR), fructose,1-6 bis phosphatase (FBPase), ATP synthase, vacuolar proton ATPase, and chaperonin have regulated their abundance to minimize ozone stress under EDU treatment. After analyzing apoplast and chloroplast protein abundance, we have drawn a schematic representation of the MAE working mechanism. The present study showed that plants can be capable of O3 tolerance, which could be improved by optimizing the apoplast ROS pool under EDU treatment.
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Affiliation(s)
- Sunil K Gupta
- Plant Ecology and Climate Change Science Division, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226 001, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201 002, India
- CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, 666 303, Yunnan, China
| | - Marisha Sharma
- Plant Ecology and Climate Change Science Division, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226 001, India
| | - Vivek K Maurya
- Plant Ecology and Climate Change Science Division, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226 001, India
| | - Farah Deeba
- Plant Ecology and Climate Change Science Division, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226 001, India
- Biotechnology Department, CSIR-Central Institute of Medicinal and Aromatic Plants, Lucknow, 226 015, India
| | - Vivek Pandey
- Plant Ecology and Climate Change Science Division, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226 001, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201 002, India.
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15
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Hoang XLT, Chuong NN, Hoa TTK, Doan H, Van PHP, Trang LDM, Huyen PNT, Le DT, Tran LSP, Thao NP. The Drought-Mediated Soybean GmNAC085 Functions as a Positive Regulator of Plant Response to Salinity. Int J Mol Sci 2021; 22:8986. [PMID: 34445699 PMCID: PMC8396556 DOI: 10.3390/ijms22168986] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 08/13/2021] [Accepted: 08/17/2021] [Indexed: 01/01/2023] Open
Abstract
Abiotic stress factors, such as drought and salinity, are known to negatively affect plant growth and development. To cope with these adverse conditions, plants have utilized certain defense mechanisms involved in various aspects, including morphological, biochemical and molecular alterations. Particularly, a great deal of evidence for the biological importance of the plant-specific NAM, ATAF1/2, CUC2 (NAC) transcription factors (TFs) in plant adaptation to abiotic stress conditions has been reported. A previous in planta study conducted by our research group demonstrated that soybean (Glycine max) GmNAC085 mediated drought resistance in transgenic Arabidopsis plants. In this study, further characterization of GmNAC085 function in association with salt stress was performed. The findings revealed that under this condition, transgenic soybean plants overexpressing GmNAC085 displayed better germination rates than wild-type plants. In addition, biochemical and transcriptional analyses showed that the transgenic plants acquired a better defense system against salinity-induced oxidative stress, with higher activities of antioxidant enzymes responsible for scavenging hydrogen peroxide or superoxide radicals. Higher transcript levels of several key stress-responsive genes involved in the proline biosynthetic pathway, sodium ion transporter and accumulation of dehydrins were also observed, indicating better osmoprotection and more efficient ion regulation capacity in the transgenic lines. Taken together, these findings and our previous report indicate that GmNAC085 may play a role as a positive regulator in plant adaptation to drought and salinity conditions.
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Affiliation(s)
- Xuan Lan Thi Hoang
- Applied Biotechnology for Crop Development Research Unit, School of Biotechnology, International University, Quarter 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Vietnam; (X.L.T.H.); (N.N.C.); (T.T.K.H.); (H.D.); (P.H.P.V.); (L.D.M.T.); (P.N.T.H.)
- Vietnam National University, Thu Duc City, Ho Chi Minh City 700000, Vietnam
| | - Nguyen Nguyen Chuong
- Applied Biotechnology for Crop Development Research Unit, School of Biotechnology, International University, Quarter 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Vietnam; (X.L.T.H.); (N.N.C.); (T.T.K.H.); (H.D.); (P.H.P.V.); (L.D.M.T.); (P.N.T.H.)
- Vietnam National University, Thu Duc City, Ho Chi Minh City 700000, Vietnam
| | - Tran Thi Khanh Hoa
- Applied Biotechnology for Crop Development Research Unit, School of Biotechnology, International University, Quarter 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Vietnam; (X.L.T.H.); (N.N.C.); (T.T.K.H.); (H.D.); (P.H.P.V.); (L.D.M.T.); (P.N.T.H.)
- Vietnam National University, Thu Duc City, Ho Chi Minh City 700000, Vietnam
| | - Hieu Doan
- Applied Biotechnology for Crop Development Research Unit, School of Biotechnology, International University, Quarter 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Vietnam; (X.L.T.H.); (N.N.C.); (T.T.K.H.); (H.D.); (P.H.P.V.); (L.D.M.T.); (P.N.T.H.)
- Vietnam National University, Thu Duc City, Ho Chi Minh City 700000, Vietnam
| | - Pham Hoang Phuong Van
- Applied Biotechnology for Crop Development Research Unit, School of Biotechnology, International University, Quarter 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Vietnam; (X.L.T.H.); (N.N.C.); (T.T.K.H.); (H.D.); (P.H.P.V.); (L.D.M.T.); (P.N.T.H.)
- Vietnam National University, Thu Duc City, Ho Chi Minh City 700000, Vietnam
| | - Le Dang Minh Trang
- Applied Biotechnology for Crop Development Research Unit, School of Biotechnology, International University, Quarter 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Vietnam; (X.L.T.H.); (N.N.C.); (T.T.K.H.); (H.D.); (P.H.P.V.); (L.D.M.T.); (P.N.T.H.)
- Vietnam National University, Thu Duc City, Ho Chi Minh City 700000, Vietnam
| | - Pham Ngoc Thai Huyen
- Applied Biotechnology for Crop Development Research Unit, School of Biotechnology, International University, Quarter 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Vietnam; (X.L.T.H.); (N.N.C.); (T.T.K.H.); (H.D.); (P.H.P.V.); (L.D.M.T.); (P.N.T.H.)
- Vietnam National University, Thu Duc City, Ho Chi Minh City 700000, Vietnam
| | - Dung Tien Le
- Agricultural Genetics Institute, Vietnam Academy of Agricultural Sciences, Pham Van Dong Str., Hanoi 100000, Vietnam;
| | - Lam-Son Phan Tran
- Department of Plant and Soil Science, Institute of Genomics for Crop Abiotic Stress Tolerance, Texas Tech University, Lubbock, TX 79409, USA
| | - Nguyen Phuong Thao
- Applied Biotechnology for Crop Development Research Unit, School of Biotechnology, International University, Quarter 6, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Vietnam; (X.L.T.H.); (N.N.C.); (T.T.K.H.); (H.D.); (P.H.P.V.); (L.D.M.T.); (P.N.T.H.)
- Vietnam National University, Thu Duc City, Ho Chi Minh City 700000, Vietnam
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16
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He H, Denecker J, Van Der Kelen K, Willems P, Pottie R, Phua SY, Hannah MA, Vertommen D, Van Breusegem F, Mhamdi A. The Arabidopsis mediator complex subunit 8 regulates oxidative stress responses. THE PLANT CELL 2021; 33:2032-2057. [PMID: 33713138 PMCID: PMC8290281 DOI: 10.1093/plcell/koab079] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 03/10/2021] [Indexed: 05/13/2023]
Abstract
Signaling events triggered by hydrogen peroxide (H2O2) regulate plant growth and defense by orchestrating a genome-wide transcriptional reprogramming. However, the specific mechanisms that govern H2O2-dependent gene expression are still poorly understood. Here, we identify the Arabidopsis Mediator complex subunit MED8 as a regulator of H2O2 responses. The introduction of the med8 mutation in a constitutive oxidative stress genetic background (catalase-deficient, cat2) was associated with enhanced activation of the salicylic acid pathway and accelerated cell death. Interestingly, med8 seedlings were more tolerant to oxidative stress generated by the herbicide methyl viologen (MV) and exhibited transcriptional hyperactivation of defense signaling, in particular salicylic acid- and jasmonic acid-related pathways. The med8-triggered tolerance to MV was manipulated by the introduction of secondary mutations in salicylic acid and jasmonic acid pathways. In addition, analysis of the Mediator interactome revealed interactions with components involved in mRNA processing and microRNA biogenesis, hence expanding the role of Mediator beyond transcription. Notably, MED8 interacted with the transcriptional regulator NEGATIVE ON TATA-LESS, NOT2, to control the expression of H2O2-inducible genes and stress responses. Our work establishes MED8 as a component regulating oxidative stress responses and demonstrates that it acts as a negative regulator of H2O2-driven activation of defense gene expression.
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Affiliation(s)
- Huaming He
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Gent, Belgium
| | - Jordi Denecker
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Gent, Belgium
- Present address: Illumina Cambridge Ltd, Cambridge, CB21 6DF, UK; Present address: Sciensano, 1050 Brussels, Belgium
| | - Katrien Van Der Kelen
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Gent, Belgium
- Present address: Illumina Cambridge Ltd, Cambridge, CB21 6DF, UK; Present address: Sciensano, 1050 Brussels, Belgium
| | - Patrick Willems
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Gent, Belgium
| | - Robin Pottie
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Gent, Belgium
| | - Su Yin Phua
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Gent, Belgium
| | - Matthew A Hannah
- BASF Belgium Coordination Center, Innovation Center Gent, 9052 Gent, Belgium
| | - Didier Vertommen
- de Duve Institute, Université Catholique de Louvain, 1200 Brussels, Belgium
| | - Frank Van Breusegem
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Gent, Belgium
| | - Amna Mhamdi
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Gent, Belgium
- Author for correspondence: (A.M.)
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17
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Sandalio LM, Peláez-Vico MA, Molina-Moya E, Romero-Puertas MC. Peroxisomes as redox-signaling nodes in intracellular communication and stress responses. PLANT PHYSIOLOGY 2021; 186:22-35. [PMID: 33587125 PMCID: PMC8154099 DOI: 10.1093/plphys/kiab060] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 01/22/2021] [Indexed: 05/05/2023]
Abstract
Peroxisomes are redox nodes playing a diverse range of roles in cell functionality and in the perception of and responses to changes in their environment.
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Affiliation(s)
- Luisa M Sandalio
- Department of Biochemistry, Cellular and Molecular Biology of Plants, Estación Experimental del Zaidín-CSIC, Profesor Albareda 1, 18008 Granada, Spain
- Author for communication:
| | - Maria Angeles Peláez-Vico
- Department of Biochemistry, Cellular and Molecular Biology of Plants, Estación Experimental del Zaidín-CSIC, Profesor Albareda 1, 18008 Granada, Spain
| | - Eliana Molina-Moya
- Department of Biochemistry, Cellular and Molecular Biology of Plants, Estación Experimental del Zaidín-CSIC, Profesor Albareda 1, 18008 Granada, Spain
| | - Maria C Romero-Puertas
- Department of Biochemistry, Cellular and Molecular Biology of Plants, Estación Experimental del Zaidín-CSIC, Profesor Albareda 1, 18008 Granada, Spain
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18
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Effect of electron beam radiation on disease resistance and quality of harvested mangoes. Radiat Phys Chem Oxf Engl 1993 2021. [DOI: 10.1016/j.radphyschem.2020.109289] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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19
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Dietzen C, Koprivova A, Whitcomb SJ, Langen G, Jobe TO, Hoefgen R, Kopriva S. The Transcription Factor EIL1 Participates in the Regulation of Sulfur-Deficiency Response. PLANT PHYSIOLOGY 2020; 184:2120-2136. [PMID: 33060195 PMCID: PMC7723090 DOI: 10.1104/pp.20.01192] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 10/07/2020] [Indexed: 06/08/2023]
Abstract
Sulfur, an indispensable constituent of many cellular components, is a growth-limiting macronutrient for plants. Thus, to successfully adapt to changing sulfur availability and environmental stress, a sulfur-deficiency response helps plants to cope with the limited supply. On the transcriptional level, this response is controlled by SULFUR LIMITATION1 (SLIM1), a member of the ETHYLENE-INSENSITIVE3-LIKE (EIL) transcription factor family. In this study, we identified EIL1 as a second transcriptional activator regulating the sulfur-deficiency response, subordinate to SLIM1/EIL3. Our comprehensive RNA sequencing analysis in Arabidopsis (Arabidopsis thaliana) allowed us to obtain a complete picture of the sulfur-deficiency response and quantify the contributions of these two transcription factors. We confirmed the key role of SLIM1/EIL3 in controlling the response, particularly in the roots, but showed that in leaves more than 50% of the response is independent of SLIM1/EIL3 and EIL1. RNA sequencing showed an additive contribution of EIL1 to the regulation of the sulfur-deficiency response but also identified genes specifically regulated through EIL1. SLIM1/EIL3 seems to have further functions (e.g. in the regulation of genes responsive to hypoxia or mediating defense at both low and normal sulfur supply). These results contribute to the dissection of mechanisms of the sulfur-deficiency response and provide additional possibilities to improve adaptation to sulfur-deficiency conditions.
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Affiliation(s)
- Christof Dietzen
- Institute for Plant Sciences, Cluster of Excellence on Plant Sciences, University of Cologne, 50674 Cologne, Germany
| | - Anna Koprivova
- Institute for Plant Sciences, Cluster of Excellence on Plant Sciences, University of Cologne, 50674 Cologne, Germany
| | - Sarah J Whitcomb
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | - Gregor Langen
- Institute for Plant Sciences, Cluster of Excellence on Plant Sciences, University of Cologne, 50674 Cologne, Germany
| | - Timothy O Jobe
- Institute for Plant Sciences, Cluster of Excellence on Plant Sciences, University of Cologne, 50674 Cologne, Germany
| | - Rainer Hoefgen
- Max Planck Institute of Molecular Plant Physiology, 14476 Potsdam-Golm, Germany
| | - Stanislav Kopriva
- Institute for Plant Sciences, Cluster of Excellence on Plant Sciences, University of Cologne, 50674 Cologne, Germany
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20
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Li Y, Li X, Yang J, He Y. Natural antisense transcripts of MIR398 genes suppress microR398 processing and attenuate plant thermotolerance. Nat Commun 2020; 11:5351. [PMID: 33093449 PMCID: PMC7582911 DOI: 10.1038/s41467-020-19186-x] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Accepted: 09/30/2020] [Indexed: 12/13/2022] Open
Abstract
MicroRNAs (miRNAs) and natural antisense transcripts (NATs) control many biological processes and have been broadly applied for genetic manipulation of eukaryotic gene expression. Still unclear, however, are whether and how NATs regulate miRNA production. Here, we report that the cis-NATs of MIR398 genes repress the processing of their pri-miRNAs. Through genome-wide analysis of RNA sequencing data, we identify cis-NATs of MIRNA genes in Arabidopsis and Brassica. In Arabidopsis, MIR398b and MIR398c are coexpressed in vascular tissues with their antisense genes NAT398b and NAT398c, respectively. Knock down of NAT398b and NAT398c promotes miR398 processing, resulting in stronger plant thermotolerance owing to silencing of miR398-targeted genes; in contrast, their overexpression activates NAT398b and NAT398c, causing poorer thermotolerance due to the upregulation of miR398-targeted genes. Unexpectedly, overexpression of MIR398b and MIR398c activates NAT398b and NAT398c. Taken together, these results suggest that NAT398b/c repress miR398 biogenesis and attenuate plant thermotolerance via a regulatory loop. MiRNAs and natural antisense transcripts can both regulate gene expression and plant development. Here, the authors show that cis-NATs to MIR398 repress processing of pri-miR398 and that cis-NAT expression is downregulated at high temperatures, contributing to miR398 mediated thermotolerance responses.
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Affiliation(s)
- Yajie Li
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, 200032, Shanghai, China.,University of the Chinese Academy of Sciences, 100049, Beijing, China
| | - Xiaorong Li
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, 200032, Shanghai, China.,University of the Chinese Academy of Sciences, 100049, Beijing, China
| | - Jun Yang
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, 200032, Shanghai, China.
| | - Yuke He
- National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, 200032, Shanghai, China.
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Chemical Genetics Approach Identifies Abnormal Inflorescence Meristem 1 as a Putative Target of a Novel Sulfonamide That Protects Catalase2-Deficient Arabidopsis against Photorespiratory Stress. Cells 2020; 9:cells9092026. [PMID: 32887516 PMCID: PMC7563276 DOI: 10.3390/cells9092026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 08/26/2020] [Accepted: 08/31/2020] [Indexed: 11/24/2022] Open
Abstract
Alterations of hydrogen peroxide (H2O2) levels have a profound impact on numerous signaling cascades orchestrating plant growth, development, and stress signaling, including programmed cell death. To expand the repertoire of known molecular mechanisms implicated in H2O2 signaling, we performed a forward chemical screen to identify small molecules that could alleviate the photorespiratory-induced cell death phenotype of Arabidopsisthaliana mutants lacking H2O2-scavenging capacity by peroxisomal catalase2. Here, we report the characterization of pakerine, an m-sulfamoyl benzamide from the sulfonamide family. Pakerine alleviates the cell death phenotype of cat2 mutants exposed to photorespiration-promoting conditions and delays dark-induced senescence in wild-type Arabidopsis leaves. By using a combination of transcriptomics, metabolomics, and affinity purification, we identified abnormal inflorescence meristem 1 (AIM1) as a putative protein target of pakerine. AIM1 is a 3-hydroxyacyl-CoA dehydrogenase involved in fatty acid β-oxidation that contributes to jasmonic acid (JA) and salicylic acid (SA) biosynthesis. Whereas intact JA biosynthesis was not required for pakerine bioactivity, our results point toward a role for β-oxidation-dependent SA production in the execution of H2O2-mediated cell death.
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Wu X, Riaz M, Yan L, Zhang Z, Jiang C. How the cells were injured and the secondary metabolites in the shikimate pathway were changed by boron deficiency in trifoliate orange root. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 151:630-639. [PMID: 32335386 DOI: 10.1016/j.plaphy.2020.04.009] [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: 02/25/2020] [Revised: 04/07/2020] [Accepted: 04/07/2020] [Indexed: 05/24/2023]
Abstract
Boron (B) deficiency is frequently observed in citrus orchards as a major cause for loss of productivity and quality. The structural and morphological responses of roots to B deficiency have been reported in some plants. The study was conducted to get novel information about the B-deficient-induced cellular injuries and target secondary metabolites in the shikimate pathway. Fluorescent vital staining, paraffin section, transmission electron microscopy (TEM) and target metabolomics were to investigate the responses of the cell viability and structure, and target aromatic metabolites in the shikimate pathway in B-deficient trifoliate orange roots. Boron deprivation-induced ROS accumulation accelerated the membrane peroxidation, resulting in weakened cell vitality and cell rupture in roots. In addition, B deficiency increased phenylalanine (Phe), tyrosine (Try) in roots, thereby promoting the biosynthesis of salicylic acid, caffeic acid and ferulic acid. B-starvation up-regulated salicylic acid and lignin while reduced 3-indoleacetic acid (IAA) content. These adverse effects might be involved in the structural and morphological changes in B-deficient roots. What is more, the results provide a new insight into the mechanism of B deficiency-induced structural damage and elongation inhibition on roots.
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Affiliation(s)
- Xiuwen Wu
- Microelement Research Center, College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, PR China; College of Resources and Environment, Hunan Agricultural University, Changsha, Hunan, 410000, PR China
| | - Muhammad Riaz
- Root Biology Center, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China
| | - Lei Yan
- Microelement Research Center, College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, PR China
| | - Zhenhua Zhang
- College of Resources and Environment, Hunan Agricultural University, Changsha, Hunan, 410000, PR China
| | - Cuncang Jiang
- Microelement Research Center, College of Resources and Environment, Huazhong Agricultural University, Wuhan, Hubei, 430070, PR China.
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23
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Ma X, Zhang B, Miao R, Deng X, Duan Y, Cheng Y, Zhang W, Shi M, Huang K, Xia XQ. Transcriptomic and Physiological Responses to Oxidative Stress in a Chlamydomonas reinhardtii Glutathione Peroxidase Mutant. Genes (Basel) 2020; 11:genes11040463. [PMID: 32344528 PMCID: PMC7230881 DOI: 10.3390/genes11040463] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 04/16/2020] [Accepted: 04/21/2020] [Indexed: 11/17/2022] Open
Abstract
Aerobic photosynthetic organisms such as algae produce reactive oxygen species (ROS) as by-products of metabolism. ROS damage biomolecules such as proteins and lipids in cells, but also act as signaling molecules. The mechanisms that maintain the metabolic balance in aerobic photosynthetic organisms and how the cells specifically respond to different levels of ROS are unclear. Glutathione peroxidase (GPX) enzymes detoxify hydrogen peroxide or organic hydroperoxides, and thus are important components of the antioxidant system. In this study, we employed a Chlamydomonas reinhardtii glutathione peroxidase knockout (gpx5) mutant to identify the genetic response to singlet oxygen (1O2) generated by the photosensitizer rose bengal (RB). To this end, we compared the transcriptomes of the parental strain CC4348 and the gpx5 mutant sampled before, and 1 h after, the addition of RB. Functional annotation of differentially expressed genes showed that genes encoding proteins related to ROS detoxification, stress-response-related molecular chaperones, and ubiquitin–proteasome pathway genes were upregulated in CC4338. When GPX5 was mutated, higher oxidative stress specifically induced the TCA cycle and enhanced mitochondrial electron transport. Transcription of selenoproteins and flagellar-associated proteins was depressed in CC4348 and the gpx5 mutant. In addition, we found iron homeostasis played an important role in maintaining redox homeostasis, and we uncovered the relationship between 1O2 stress and iron assimilation, as well as selenoproteins. Based on the observed expression profiles in response to different levels of oxidative stress, we propose a model for dose-dependent responses to different ROS levels in Chlamydomonas.
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Affiliation(s)
- Xiaocui Ma
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China; (X.M.); (B.Z.); (R.M.); (X.D.); (Y.D.); (Y.C.); (W.Z.); (M.S.)
- University of Chinese Academy of Sciences, Beijing 100039, China
| | - Baolong Zhang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China; (X.M.); (B.Z.); (R.M.); (X.D.); (Y.D.); (Y.C.); (W.Z.); (M.S.)
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China
- University of Chinese Academy of Sciences, Beijing 100039, China
| | - Rongli Miao
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China; (X.M.); (B.Z.); (R.M.); (X.D.); (Y.D.); (Y.C.); (W.Z.); (M.S.)
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China
- University of Chinese Academy of Sciences, Beijing 100039, China
| | - Xuan Deng
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China; (X.M.); (B.Z.); (R.M.); (X.D.); (Y.D.); (Y.C.); (W.Z.); (M.S.)
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China
| | - You Duan
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China; (X.M.); (B.Z.); (R.M.); (X.D.); (Y.D.); (Y.C.); (W.Z.); (M.S.)
- University of Chinese Academy of Sciences, Beijing 100039, China
| | - Yingyin Cheng
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China; (X.M.); (B.Z.); (R.M.); (X.D.); (Y.D.); (Y.C.); (W.Z.); (M.S.)
| | - Wanting Zhang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China; (X.M.); (B.Z.); (R.M.); (X.D.); (Y.D.); (Y.C.); (W.Z.); (M.S.)
| | - Mijuan Shi
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China; (X.M.); (B.Z.); (R.M.); (X.D.); (Y.D.); (Y.C.); (W.Z.); (M.S.)
| | - Kaiyao Huang
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China; (X.M.); (B.Z.); (R.M.); (X.D.); (Y.D.); (Y.C.); (W.Z.); (M.S.)
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China
- Correspondence: (K.H.); (X.-Q.X.)
| | - Xiao-Qin Xia
- Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, Hubei, China; (X.M.); (B.Z.); (R.M.); (X.D.); (Y.D.); (Y.C.); (W.Z.); (M.S.)
- University of Chinese Academy of Sciences, Beijing 100039, China
- Correspondence: (K.H.); (X.-Q.X.)
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24
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Chen J, Xu Y, Fei K, Wang R, He J, Fu L, Shao S, Li K, Zhu K, Zhang W, Wang Z, Yang J. Physiological mechanism underlying the effect of high temperature during anthesis on spikelet-opening of photo-thermo-sensitive genic male sterile rice lines. Sci Rep 2020; 10:2210. [PMID: 32042005 PMCID: PMC7010791 DOI: 10.1038/s41598-020-59183-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Accepted: 01/24/2020] [Indexed: 12/03/2022] Open
Abstract
Decrease in the grain yield resulted from a low percentage of opened spikelets under high temperature (HT) during anthesis is a serious problem in the seed production of photo-thermo-sensitive genic male sterile (PTGMS) rice (Oryza sativa L.) lines, and the mechanism is little understood. Elucidating the physiological mechanism underlying the effect of HT during anthesis on spikelet-opening of PTGMS lines would have great significance in exploring the effective way to mitigate the adverse effect of HT. In this study, two PTGMS lines and one restorer line of rice were used and were subjected to normal temperature (NT) and HT treatments. The results showed that, compared with NT, HT significantly decreased the percentage of opened spikelets, fertilization percentage and seed-setting by significantly increasing the percentage of wrapped spikelets and reducing the spikelet-opening angle, length of spikelet-opening time. The HT significantly decreased the contents of soluble sugars, jasmonic acid (JA) and methyl jasmonate (MeJA) in the lodicules before and at glume-opening, which were significantly correlated with and accounts for the low percentage of opened spikelets under HT for rice, especially for the PTGMS lines.
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Affiliation(s)
- Jing Chen
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, Jiangsu, China
| | - Yangdong Xu
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, Jiangsu, China
| | - Keqi Fei
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, Jiangsu, China
| | - Rui Wang
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, Jiangsu, China
| | - Jiang He
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, Jiangsu, China
| | - Lidong Fu
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, Jiangsu, China
| | - Shimei Shao
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, Jiangsu, China
| | - Ke Li
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, Jiangsu, China
| | - Kuanyu Zhu
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, Jiangsu, China
| | - Weiyang Zhang
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, Jiangsu, China
| | - Zhiqin Wang
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, Jiangsu, China
| | - Jianchang Yang
- Jiangsu Key Laboratory of Crop Genetics and Physiology/Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, Jiangsu, China.
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He M, Ding NZ. Plant Unsaturated Fatty Acids: Multiple Roles in Stress Response. FRONTIERS IN PLANT SCIENCE 2020; 11:562785. [PMID: 33013981 PMCID: PMC7500430 DOI: 10.3389/fpls.2020.562785] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Accepted: 08/19/2020] [Indexed: 05/21/2023]
Abstract
Land plants are exposed to not only biotic stresses such as pathogen infection and herbivore wounding, but abiotic stresses such as cold, heat, drought, and salt. Elaborate strategies have been developed to avoid or abide the adverse effects, with unsaturated fatty acids (UFAs) emerging as general defenders. In higher plants, the most common UFAs are three 18-carbon species, namely, oleic (18:1), linoleic (18:2), and α-linolenic (18:3) acids. These simple compounds act as ingredients and modulators of cellular membranes in glycerolipids, reserve of carbon and energy in triacylglycerol, stocks of extracellular barrier constituents (e.g., cutin and suberin), precursors of various bioactive molecules (e.g., jasmonates and nitroalkenes), and regulators of stress signaling. Nevertheless, they are also potential inducers of oxidative stress. In this review, we will present an overview of these roles and then shed light on genetic engineering of FA synthetic genes for improving plant/crop stress tolerance.
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26
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Ji XR, Yu YH, Ni PY, Zhang GH, Guo DL. Genome-wide identification of small heat-shock protein (HSP20) gene family in grape and expression profile during berry development. BMC PLANT BIOLOGY 2019; 19:433. [PMID: 31623556 PMCID: PMC6798335 DOI: 10.1186/s12870-019-2031-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 09/11/2019] [Indexed: 05/09/2023]
Abstract
BACKGROUND Studies have shown that HSP20 (heat-shock protein 20) genes play important roles in regulating plant growth, development, and stress response. However, the grape HSP20 gene family has not been well studied. RESULTS A total of 48 VvHSP20 genes were identified from the grape genome, which were divided into 11 subfamilies (CI, CII, CIII, CV, CVI, CVII, MI, MII, ER, CP and PX/Po) based on a phylogenetic analysis and subcellular localization. Further structural analysis showed that most of the VvHSP20 genes (93.8%) had no intron or only one intron, while genes that clustered together based on a phylogenetic tree had similar motifs and evolutionarily conserved structures. The HSP20s share a conservedα-crystalline domain (ACD) and the different components of the ACD domain suggest the functional diversity of VvHSP20s. In addition, the 48 VvHSP20 genes were distributed on 12 grape chromosomes and the majority of VvHSP20 genes were located at the proximal or distal ends of chromosomes. Chromosome mapping indicated that four groups of VvHSP20 genes were identified as tandem duplication genes. Phytohormone responsive, abiotic and biotic stress-responsive, and plant development-related cis-elements were identified from the cis-regulatory elements analysis of VvHSP20s. The expression profiles of VvHSP20s genes (VvHSP20-1, 11, 14, 17, 18, 19, 20, 24, 25, 28, 31, 39, 42, and 43) were largely similar between RNA-Seq and qRT-PCR analysis after hydrogen peroxide (H2O2) treatment. The results showed that most VvHSP20s were down-regulated by H2O2 treatment during fruit development. VvHSP20s genes were indeed found to be involved in the grape berry development and differences in their transcriptional levels may be the result of functional differentiation during evolution. CONCLUSIONS Our results provide valuable information on the evolutionary relationship of genes in the VvHSP20 family, which is useful for future studies on the functional characteristics of VvHSP20 genes in grape.
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Affiliation(s)
- Xiao-Ru Ji
- College of Forestry, Henan University of Science and Technology, Luoyang, 471023 Henan Province China
- Henan Engineering Technology Research Center of Quality Regulation and Controlling of Horticultural Plants, Luoyang, 471023 Henan Province China
| | - Yi-He Yu
- College of Forestry, Henan University of Science and Technology, Luoyang, 471023 Henan Province China
- Henan Engineering Technology Research Center of Quality Regulation and Controlling of Horticultural Plants, Luoyang, 471023 Henan Province China
| | - Pei-Yi Ni
- College of Forestry, Henan University of Science and Technology, Luoyang, 471023 Henan Province China
- Henan Engineering Technology Research Center of Quality Regulation and Controlling of Horticultural Plants, Luoyang, 471023 Henan Province China
| | - Guo-Hai Zhang
- College of Forestry, Henan University of Science and Technology, Luoyang, 471023 Henan Province China
| | - Da-Long Guo
- College of Forestry, Henan University of Science and Technology, Luoyang, 471023 Henan Province China
- Henan Engineering Technology Research Center of Quality Regulation and Controlling of Horticultural Plants, Luoyang, 471023 Henan Province China
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27
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Alber NA, Vanlerberghe GC. Signaling interactions between mitochondria and chloroplasts in Nicotiana tabacum leaf. PHYSIOLOGIA PLANTARUM 2019; 167:188-204. [PMID: 30467859 DOI: 10.1111/ppl.12879] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 11/15/2018] [Indexed: 06/09/2023]
Abstract
Research has begun to elucidate the signal transduction pathway(s) that control cellular responses to changes in mitochondrial status. Important tools in such studies are chemical inhibitors used to initiate mitochondrial dysfunction. This study compares the effect of different inhibitors and treatment conditions on the transcript amount of nuclear genes specifically responsive to mitochondrial dysfunction in leaf of Nicotiana tabacum L. cv. Petit Havana. The Complex III inhibitors antimycin A (AA) and myxothiazol (MYXO), and the Complex V inhibitor oligomycin (OLIGO), each increased the transcript amount of the mitochondrial dysfunction genes. Transcript responses to OLIGO were greater during treatment in the dark than in the light, and the dark treatment resulted in cell death. In the dark, transcript responses to AA and MYXO were similar to one another, despite MYXO leading to cell death. In the light, transcript responses to AA and MYXO diverged, despite cell viability remaining high with either inhibitor. This divergent response may be due to differential signaling from the chloroplast because only AA also inhibited cyclic electron transport, resulting in a strong acceptor-side limitation in photosystem I. In the light, chemical inhibition of chloroplast electron transport reduced transcript responses to AA, while having no effect on the response to MYXO, and increasing the response to OLIGO. Hence, when studying mitochondrial dysfunction signaling, different inhibitor and treatment combinations differentially affect linked processes (e.g. chloroplast function and cell fate) that then contribute to measured responses. Therefore, inhibitor and treatment conditions should be chosen to align with specific study goals.
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Affiliation(s)
- Nicole A Alber
- Department of Biological Sciences, Department of Cell and Systems Biology, University of Toronto Scarborough, Toronto, Ontario, M1C 1A4, Canada
| | - Greg C Vanlerberghe
- Department of Biological Sciences, Department of Cell and Systems Biology, University of Toronto Scarborough, Toronto, Ontario, M1C 1A4, Canada
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28
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Farooq MA, Niazi AK, Akhtar J, Farooq M, Souri Z, Karimi N, Rengel Z. Acquiring control: The evolution of ROS-Induced oxidative stress and redox signaling pathways in plant stress responses. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2019; 141:353-369. [PMID: 31207496 DOI: 10.1016/j.plaphy.2019.04.039] [Citation(s) in RCA: 151] [Impact Index Per Article: 30.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Revised: 04/23/2019] [Accepted: 04/30/2019] [Indexed: 05/18/2023]
Abstract
Reactive oxygen species (ROS) - the byproducts of aerobic metabolism - influence numerous aspects of the plant life cycle and environmental response mechanisms. In plants, ROS act like a double-edged sword; they play multiple beneficial roles at low concentrations, whereas at high concentrations ROS and related redox-active compounds cause cellular damage through oxidative stress. To examine the dual role of ROS as harmful oxidants and/or crucial cellular signals, this review elaborates that (i) how plants sense and respond to ROS in various subcellular organelles and (ii) the dynamics of subsequent ROS-induced signaling processes. The recent understanding of crosstalk between various cellular compartments in mediating their redox state spatially and temporally is discussed. Emphasis on the beneficial effects of ROS in maintaining cellular energy homeostasis, regulating diverse cellular functions, and activating acclimation responses in plants exposed to abiotic and biotic stresses are described. The comprehensive view of cellular ROS dynamics covering the breadth and versatility of ROS will contribute to understanding the complexity of apparently contradictory ROS roles in plant physiological responses in less than optimum environments.
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Affiliation(s)
- Muhammad Ansar Farooq
- Institute of Soil & Environmental Sciences, University of Agriculture, Faisalabad, Pakistan.
| | - Adnan Khan Niazi
- Center of Agricultural Biochemistry and Biotechnology, University of Agriculture, Faisalabad, Pakistan
| | - Javaid Akhtar
- Institute of Soil & Environmental Sciences, University of Agriculture, Faisalabad, Pakistan
| | - Muhammad Farooq
- Department of Crop Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University, Oman
| | - Zahra Souri
- Laboratory of Plant Physiology, Department of Biology, Faculty of Science, Razi University, Kermanshah, Iran
| | - Naser Karimi
- Laboratory of Plant Physiology, Department of Biology, Faculty of Science, Razi University, Kermanshah, Iran
| | - Zed Rengel
- School of Agriculture and Environment, University of Western Australia, 35 Stirling Highway, Perth, WA, 6009, Australia
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Shi X, Jiang F, Wen J, Wu Z. Overexpression of Solanum habrochaites microRNA319d (sha-miR319d) confers chilling and heat stress tolerance in tomato (S. lycopersicum). BMC PLANT BIOLOGY 2019; 19:214. [PMID: 31122194 PMCID: PMC6533698 DOI: 10.1186/s12870-019-1823-x] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 05/08/2019] [Indexed: 05/04/2023]
Abstract
BACKGROUND MicroRNA319 (miR319) acts as an essential regulator of gene expression during plant development and under stress conditions. Although the role of miR319a in regulating leaf development has been well studied in tomato (Solanum lycopersicum), the function of the recently discovered wild tomato Solanum habrochaites miRNA319d (sha-miR319d) remains poorly understood. In this study, we overexpressed sha-miR319d in cultivated tomato 'Micro-Tom' to further investigate its role in tomato temperature stress responses. RESULTS Under chilling or heat stress, sha-miR319d-overexpressing plants showed enhanced stress tolerance, including lower relative electrolyte leakage (REL), malondialdehyde (MDA) concentration, O2- generation and H2O2 concentration and higher chlorophyll contents and Fv/Fm values than wild-type (WT) plants. Overexpression of sha-miR319d enhanced the activities of superoxide dismutase (SOD) and catalase (CAT), with possible correlation with elevated expression levels of the genes FeSOD, CuZnSOD and CAT. Moreover, different expression levels of key genes involved in chilling (MYB83 and CBF1), heat (HsfA1a, HsfA1b and Hsp90), and reactive oxygen species (ROS) (ZAT12 and ZAT10) signaling in transgenic plants and WT were determined, suggesting a role for sha-miR319d in regulating tomato temperature stress via chilling, heat and ROS signaling. Silencing GAMYB-like1 increased tomato chilling tolerance as well as the expression levels of CBF1, CuZnSOD, CAT, APX1, APX2, ZAT12 and ZAT10. Additionally, overexpression of sha-miR319d in tomato caused plant leaf crinkling and reduced height. CONCLUSIONS Overexpression of sha-miR319d confers chilling and heat stress tolerance in tomato. Sha-miR319d regulates tomato chilling tolerance, possibly by inhibiting expression of GAMYB-like1 and further alters chilling, heat and ROS signal transduction. Our research provides insight for further study of the role of sha-miR319d in tomato growth and stress regulation and lays a foundation for the genetic improvement of tomato.
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Affiliation(s)
- Xiaopu Shi
- College of Horticulture, Nanjing Agricultural University, Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in East China, Ministry of Agriculture, Nanjing, 210095 People’s Republic of China
| | - Fangling Jiang
- College of Horticulture, Nanjing Agricultural University, Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in East China, Ministry of Agriculture, Nanjing, 210095 People’s Republic of China
| | - Junqin Wen
- College of Horticulture, Nanjing Agricultural University, Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in East China, Ministry of Agriculture, Nanjing, 210095 People’s Republic of China
| | - Zhen Wu
- College of Horticulture, Nanjing Agricultural University, Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in East China, Ministry of Agriculture, Nanjing, 210095 People’s Republic of China
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30
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Foyer CH, Pellny TK, Locato V, Hull J, De Gara L. Analysis of Redox Relationships in the Plant Cell Cycle: Determination of Ascorbate, Glutathione, and Poly(ADPribose)polymerase (PARP) in Plant Cell Cultures. Methods Mol Biol 2019; 1990:165-181. [PMID: 31148071 DOI: 10.1007/978-1-4939-9463-2_14] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Reactive oxygen species (ROS) and low molecular weight antioxidants, such as glutathione and ascorbate, are powerful signalling molecules that participate in the control of plant growth and development, and modulate progression through the mitotic cell cycle. Enhanced ROS accumulation or low levels of ascorbate or glutathione cause the cell cycle to arrest and halt progression especially through the G1 checkpoint. Plant cell suspension cultures have proved to be particularly useful tools for the study of cell cycle regulation. Here we provide effective and accurate methods for the measurement of changes in the cellular ascorbate and glutathione pools and the activities of related enzymes such poly(ADP-ribose)polymerase (PARP) during mitosis and cell expansion, particularly in cell suspension cultures. These methods can be used in studies seeking to improve current understanding of the roles of redox controls on cell division and cell expansion.
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Affiliation(s)
| | - Till K Pellny
- Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Vittoria Locato
- Faculty of Biological Sciences, University of Leeds, Leeds, UK
| | - Jonathon Hull
- Faculty of Biological Sciences, University of Leeds, Leeds, UK.,Faculty Health and Applied Sciences, University of the West of England, Bristol, UK
| | - Laura De Gara
- Faculty of Biological Sciences, University of Leeds, Leeds, UK
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Su T, Li W, Wang P, Ma C. Dynamics of Peroxisome Homeostasis and Its Role in Stress Response and Signaling in Plants. FRONTIERS IN PLANT SCIENCE 2019; 10:705. [PMID: 31214223 PMCID: PMC6557986 DOI: 10.3389/fpls.2019.00705] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Accepted: 05/13/2019] [Indexed: 05/19/2023]
Abstract
Peroxisomes play vital roles in plant growth, development, and environmental stress response. During plant development and in response to environmental stresses, the number and morphology of peroxisomes are dynamically regulated to maintain peroxisome homeostasis in cells. To execute their various functions in the cell, peroxisomes associate and communicate with other organelles. Under stress conditions, reactive oxygen species (ROS) produced in peroxisomes and other organelles activate signal transduction pathways, in a process known as retrograde signaling, to synergistically regulate defense systems. In this review, we focus on the recent advances in the plant peroxisome field to provide an overview of peroxisome biogenesis, degradation, crosstalk with other organelles, and their role in response to environmental stresses.
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Hudek L, Enez A, Bräu L. Cyanobacterial Catalase Activity Prevents Oxidative Stress Induced by Pseudomonas fluorescens DUS1-27 from Inhibiting Brassica napus L. (canola) Growth. Microbes Environ 2018; 33:407-416. [PMID: 30473566 PMCID: PMC6307994 DOI: 10.1264/jsme2.me18061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Accepted: 10/05/2018] [Indexed: 11/17/2022] Open
Abstract
Plant growth-promoting bacteria (PGPB) inhabit the rhizosphere of plants and are capable of enhancing plant growth through a number of mechanisms. A strain of Pseudomonas fluorescens DUS1-27 was identified as a potential PGPB candidate based on its ability to increase the growth of Brassica napus L. (canola) over that of uninoculated control plants in a soil-based system. The same P. fluorescens isolate was found to reduce plant growth in a hydroponic growth system, with plants showing the symptoms of a microbe-associated molecular pattern (MAMP) response to the bacteria. The amperometric quantification of H2O2, fluorescence-based total peroxidase assays, and quantification of catalase gene expression levels using qRT-PCR revealed that oxidative stress reduced plant growth in the hydroponic system. The addition of the cyanobacterium Nostoc punctiforme (known to have high catalase activity levels) in the hydroponic system as a co-inoculant reduced oxidative stress (49.7% decrease in H2O2 concentrations) triggered by the addition of P. fluorescens DUS1-27, thereby enabling plants to grow larger than uninoculated control plants. These results show the advantage of inoculating with multiple bacteria to promote plant growth and, for the first time, demonstrate that N. punctiforme beneficially assists plants under oxidative stress through its catalase activity in planta.
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Affiliation(s)
- Lee Hudek
- Deakin University, GeelongAustraliaCentre for Regional and Rural Futures, School of Life and Environmental Sciences
- Deakin University, GeelongAustraliaCentre for Cellular and Molecular Biology, School of Life and Environmental Sciences
| | - Aydin Enez
- Deakin University, GeelongAustraliaCentre for Regional and Rural Futures, School of Life and Environmental Sciences
- Deakin University, GeelongAustraliaCentre for Cellular and Molecular Biology, School of Life and Environmental Sciences
| | - Lambert Bräu
- Deakin University, GeelongAustraliaCentre for Regional and Rural Futures, School of Life and Environmental Sciences
- Deakin University, GeelongAustraliaCentre for Cellular and Molecular Biology, School of Life and Environmental Sciences
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Yu J, Zhang Y, Liu J, Wang L, Liu P, Yin Z, Guo S, Ma J, Lu Z, Wang T, She Y, Miao Y, Ma L, Chen S, Li Y, Dai S. Proteomic discovery of H 2O 2 response in roots and functional characterization of PutGLP gene from alkaligrass. PLANTA 2018; 248:1079-1099. [PMID: 30039231 DOI: 10.1007/s00425-018-2940-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 06/13/2018] [Indexed: 06/08/2023]
Abstract
Hydrogen peroxide-responsive pathways in roots of alkaligrass analyzed by proteomic studies and PutGLP enhance the plant tolerance to saline-, alkali- and cadmium-induced oxidative stresses. Oxidative stress adaptation is critical for plants in response to various stress environments. The halophyte alkaligrass (Puccinellia tenuiflora) is an outstanding pasture with strong tolerance to salt and alkali stresses. In this study, iTRAQ- and 2DE-based proteomics approaches, as well as qRT-PCR and molecular genetics, were employed to investigate H2O2-responsive mechanisms in alkaligrass roots. The evaluation of membrane integrity and reactive oxygen species (ROS)-scavenging systems, as well as abundance patterns of H2O2-responsive proteins/genes indicated that Ca2+-mediated kinase signaling pathways, ROS homeostasis, osmotic modulation, and transcriptional regulation were pivotal for oxidative adaptation in alkaligrass roots. Overexpressing a P. tenuiflora germin-like protein (PutGLP) gene in Arabidopsis seedlings revealed that the apoplastic PutGLP with activities of oxalate oxidase and superoxide dismutase was predominantly expressed in roots and played important roles in ROS scavenging in response to salinity-, alkali-, and CdCl2-induced oxidative stresses. The results provide insights into the fine-tuned redox-responsive networks in halophyte roots.
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Affiliation(s)
- Juanjuan Yu
- Alkali Soil Natural Environmental Science Center, Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, Northeast Forestry University, Harbin, 150040, China
- Development Centre of Plant Germplasm Resources, College of Life and Environmental Sciences, Shanghai Normal University, Shanghai, 200234, China
| | - Yongxue Zhang
- Alkali Soil Natural Environmental Science Center, Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, Northeast Forestry University, Harbin, 150040, China
- Development Centre of Plant Germplasm Resources, College of Life and Environmental Sciences, Shanghai Normal University, Shanghai, 200234, China
| | - Junming Liu
- Alkali Soil Natural Environmental Science Center, Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, Northeast Forestry University, Harbin, 150040, China
| | - Lin Wang
- Alkali Soil Natural Environmental Science Center, Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, Northeast Forestry University, Harbin, 150040, China
| | - Panpan Liu
- Alkali Soil Natural Environmental Science Center, Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, Northeast Forestry University, Harbin, 150040, China
| | - Zepeng Yin
- Alkali Soil Natural Environmental Science Center, Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, Northeast Forestry University, Harbin, 150040, China
| | - Siyi Guo
- Institute of Plant Stress Biology, State Key Laboratory of Cotton Biology, Department of Biology, Henan University, Kaifeng, 455000, China
| | - Jun Ma
- Shanghai Center for Plant Stress Biology, Chinese Academy of Sciences, Shanghai, 201602, China
| | - Zhuang Lu
- Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Tai Wang
- Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China
| | - Yimin She
- Shanghai Center for Plant Stress Biology, Chinese Academy of Sciences, Shanghai, 201602, China
| | - Yuchen Miao
- Institute of Plant Stress Biology, State Key Laboratory of Cotton Biology, Department of Biology, Henan University, Kaifeng, 455000, China
| | - Ling Ma
- Alkali Soil Natural Environmental Science Center, Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, Northeast Forestry University, Harbin, 150040, China
| | - Sixue Chen
- Department of Biology, Genetics Institute, Plant Molecular and Cellular Program, Interdisciplinary Center for Biotechnology Research, University of Florida, Gainesville, FL, 32610, USA
| | - Ying Li
- Alkali Soil Natural Environmental Science Center, Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, Northeast Forestry University, Harbin, 150040, China.
| | - Shaojun Dai
- Alkali Soil Natural Environmental Science Center, Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, Northeast Forestry University, Harbin, 150040, China.
- Development Centre of Plant Germplasm Resources, College of Life and Environmental Sciences, Shanghai Normal University, Shanghai, 200234, China.
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Song H, Sun W, Yang G, Sun J. WRKY transcription factors in legumes. BMC PLANT BIOLOGY 2018; 18:243. [PMID: 30332991 PMCID: PMC6192229 DOI: 10.1186/s12870-018-1467-2] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 10/03/2018] [Indexed: 05/05/2023]
Abstract
BACKGROUND WRKY transcription factors, so named because of the WRKYGQK heptapeptide at the N-terminal end, are widely distributed in plants and play an important role in physiological changes and response to biotic and abiotic stressors. Many previous studies have focused on the evolution of WRKY transcription factors in a given plant; however, little is known about WRKY evolution in legumes. The gene expression pattern of duplicated WRKY transcription factors remains unclear. RESULTS We first identified the WRKY proteins in 12 legumes. We found that the WRKYGQK heptapeptide tended to mutate into WRKYGKK. The Q site in WRKYGQK preferentially mutated, while W, K, and Y were conserved. The phylogenetic tree shows that the WRKY proteins in legumes have multiple origins, especially group IIc. For example, WRKY64 from Lupinus angustifolius (LaWRKY64) contains three WRKY domains, of which the first two clustered together in the N-terminal WRKY domain of the group I WRKY protein, and the third WRKY domain grouped in the C-terminal WRKY domain of the group I WRKY protein. Orthologous WRKY genes have a faster evolutionary rate and are subject to constrained selective pressure, unlike paralogous WRKY genes. Different gene features were observed between duplicated WRKY genes and singleton WRKY genes. Duplicated Glycine max WRKY genes with similar gene features have gene expression divergence. CONCLUSIONS We analyzed the WRKY number and type in 12 legumes, concluding that the WRKY proteins have multiple origins. A novel WRKY protein, LaWRKY64, was found in L. angustifolius. The first two WRKY domains of LaWRKY64 have the same origin. The orthologous and paralogous WRKY proteins have different evolutionary rates. Duplicated WRKY genes have gene expression divergence under normal growth conditions in G. max. These results provide insight into understanding WRKY evolution and expression.
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Affiliation(s)
- Hui Song
- Grassland Agri-husbandry Research Center, Qingdao Agricultural University, Qingdao, 266109 China
| | - Weihong Sun
- Grassland Agri-husbandry Research Center, Qingdao Agricultural University, Qingdao, 266109 China
| | - Guofeng Yang
- Grassland Agri-husbandry Research Center, Qingdao Agricultural University, Qingdao, 266109 China
| | - Juan Sun
- Grassland Agri-husbandry Research Center, Qingdao Agricultural University, Qingdao, 266109 China
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Dhanushkodi R, Matthew C, McManus MT, Dijkwel PP. Drought-induced senescence of Medicago truncatula nodules involves serpin and ferritin to control proteolytic activity and iron levels. THE NEW PHYTOLOGIST 2018; 220:196-208. [PMID: 29974467 DOI: 10.1111/nph.15298] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Accepted: 05/20/2018] [Indexed: 05/09/2023]
Abstract
Drought is a major constraint for legume growth and yield. Senescence of nitrogen-fixing nodules is one of the early drought responses and may cause nutrient stress in addition to water stress in legumes. For nodule senescence to function as part of a drought-survival strategy, we propose that the intrinsically destructive senescence process must be tightly regulated. Medicago truncatula protease inhibitor and iron scavenger-encoding genes, possibly involved in controlling nodule senescence, were identified. RNA interference (RNAi) lines were constructed in which expression of a serpin or ferritins was knocked down. Both wild-type and RNAi lines were subjected to drought stress and nodule activity and plant physiological responses were measured. Drought caused M. truncatula to initiate nodule senescence before plant growth was affected and before an increase in papain-like proteolytic activity and free iron levels was apparent. Knock-down expression of serpin6 and ferritins caused increased protease activity, free iron levels, early nodule senescence and reduced plant growth. The results suggest that M. truncatula nodule-expressed serpin6 and ferritins mediate ordered drought-induced senescence by regulating papain-like cysteine protease activity and free iron levels. This strategy may allow the drought-stressed plants to benefit maximally from residual nitrogen fixation and nutrient recovery resulting from break down of macromolecules.
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Affiliation(s)
- Ramadoss Dhanushkodi
- Institute of Fundamental Sciences, Massey University, Private Bag 11-222, Palmerston North, New Zealand
| | - Cory Matthew
- Institute of Agriculture and Environment, Massey University, Private Bag 11-222, Palmerston North, New Zealand
| | - Michael T McManus
- Institute of Fundamental Sciences, Massey University, Private Bag 11-222, Palmerston North, New Zealand
| | - Paul P Dijkwel
- Institute of Fundamental Sciences, Massey University, Private Bag 11-222, Palmerston North, New Zealand
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Kofroňová M, Mašková P, Lipavská H. Two facets of world arsenic problem solution: crop poisoning restriction and enforcement of phytoremediation. PLANTA 2018; 248:19-35. [PMID: 29736625 DOI: 10.1007/s00425-018-2906-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Accepted: 04/27/2018] [Indexed: 06/08/2023]
Abstract
This review provides insights into As toxicity in plants with focus on photosynthesis and sugar metabolism as important arsenic targets and simultaneously defence tools against accompanying oxidative stress. Heavy metal contamination is a great problem all over the world. Arsenic, a metalloid occurring naturally in the Earth's crust, also massively spreads out in the environment by human activities. Its accumulation in crops poses a severe health risk to humans and animals. Besides the restriction of human-caused contamination, there are two basic ways how to cope with the problem: first, to limit arsenic accumulation in harvestable parts of the crops; second, to make use of some arsenic hyperaccumulating plants for phytoremediation of contaminated soils and waters. Progress in the use of both strategies depends strongly on the level of our knowledge on the physiological and morphological processes resulting from arsenic exposure. Arsenic uptake is mediated preferentially by P and Si transporters and its accumulation substantially impairs plant metabolism at numerous levels including damages through oxidative stress. Rice is a predominantly studied crop where substantial progress has been made in understanding of the mechanisms of arsenic uptake, distribution, and detoxification, though many questions still remain. Full exploitation of plant potential for soil and water phytoremediations also requires deep understanding of the plant response to this toxic metalloid. The aim of this review is to summarize data regarding the effect of arsenic on plant physiology with a focus on mechanisms providing increased arsenic tolerance and/or hyperaccumulation. The emphasis is placed on the topic unjustifiably neglected in the previous reviews - i.e., carbohydrate metabolism, tightly connected to photosynthesis, and beside others involved in plant ability to cope with arsenic-induced oxidative and nitrosative stresses.
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Affiliation(s)
- Monika Kofroňová
- Department of Experimental Plant Biology, Faculty of Science, Charles University, Viničná 5, 128 43, Prague 2, Czech Republic
| | - Petra Mašková
- Department of Experimental Plant Biology, Faculty of Science, Charles University, Viničná 5, 128 43, Prague 2, Czech Republic.
| | - Helena Lipavská
- Department of Experimental Plant Biology, Faculty of Science, Charles University, Viničná 5, 128 43, Prague 2, Czech Republic
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Ortega-Villasante C, Burén S, Blázquez-Castro A, Barón-Sola Á, Hernández LE. Fluorescent in vivo imaging of reactive oxygen species and redox potential in plants. Free Radic Biol Med 2018; 122:202-220. [PMID: 29627452 DOI: 10.1016/j.freeradbiomed.2018.04.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 03/26/2018] [Accepted: 04/04/2018] [Indexed: 02/07/2023]
Abstract
Reactive oxygen species (ROS) are by-products of aerobic metabolism, and excessive production can result in oxidative stress and cell damage. In addition, ROS function as cellular messengers, working as redox regulators in a multitude of biological processes. Understanding ROS signalling and stress responses requires methods for precise imaging and quantification to monitor local, subcellular and global ROS dynamics with high selectivity, sensitivity and spatiotemporal resolution. In this review, we summarize the present knowledge for in vivo plant ROS imaging and detection, using both chemical probes and fluorescent protein-based biosensors. Certain characteristics of plant tissues, for example high background autofluorescence in photosynthetic organs and the multitude of endogenous antioxidants, can interfere with ROS and redox potential detection, making imaging extra challenging. Novel methods and techniques to measure in vivo plant ROS and redox changes with better selectivity, accuracy, and spatiotemporal resolution are therefore desirable to fully acknowledge the remarkably complex plant ROS signalling networks.
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Affiliation(s)
- Cristina Ortega-Villasante
- Fisiología Vegetal, Departamento de Biología, Universidad Autónoma de Madrid, Campus de Cantoblanco, 28049 Madrid, Spain.
| | - Stefan Burén
- Centro de Biotecnología y Genómica de Plantas (CBGP), Universidad Politécnica de Madrid (UPM) - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Campus Montegancedo UPM, 28223 Pozuelo de Alarcón, Madrid, Spain
| | - Alfonso Blázquez-Castro
- Departamento de Física de Materiales, Universidad Autónoma de Madrid, Campus de Cantoblanco, 28049 Madrid, Spain
| | - Ángel Barón-Sola
- Fisiología Vegetal, Departamento de Biología, Universidad Autónoma de Madrid, Campus de Cantoblanco, 28049 Madrid, Spain
| | - Luis E Hernández
- Fisiología Vegetal, Departamento de Biología, Universidad Autónoma de Madrid, Campus de Cantoblanco, 28049 Madrid, Spain
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Mullineaux PM, Exposito-Rodriguez M, Laissue PP, Smirnoff N. ROS-dependent signalling pathways in plants and algae exposed to high light: Comparisons with other eukaryotes. Free Radic Biol Med 2018; 122:52-64. [PMID: 29410363 DOI: 10.1016/j.freeradbiomed.2018.01.033] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 01/27/2018] [Accepted: 01/31/2018] [Indexed: 01/09/2023]
Abstract
Like all aerobic organisms, plants and algae co-opt reactive oxygen species (ROS) as signalling molecules to drive cellular responses to changes in their environment. In this respect, there is considerable commonality between all eukaryotes imposed by the constraints of ROS chemistry, similar metabolism in many subcellular compartments, the requirement for a high degree of signal specificity and the deployment of thiol peroxidases as transducers of oxidising equivalents to regulatory proteins. Nevertheless, plants and algae carry out specialised signalling arising from oxygenic photosynthesis in chloroplasts and photoautotropism, which often induce an imbalance between absorption of light energy and the capacity to use it productively. A key means of responding to this imbalance is through communication of chloroplasts with the nucleus to adjust cellular metabolism. Two ROS, singlet oxygen (1O2) and hydrogen peroxide (H2O2), initiate distinct signalling pathways when photosynthesis is perturbed. 1O2, because of its potent reactivity means that it initiates but does not transduce signalling. In contrast, the lower reactivity of H2O2 means that it can also be a mobile messenger in a spatially-defined signalling pathway. How plants translate a H2O2 message to bring about changes in gene expression is unknown and therefore, we draw on information from other eukaryotes to propose a working hypothesis. The role of these ROS generated in other subcellular compartments of plant cells in response to HL is critically considered alongside other eukaryotes. Finally, the responses of animal cells to oxidative stress upon high irradiance exposure is considered for new comparisons between plant and animal cells.
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Affiliation(s)
- Philip M Mullineaux
- School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, UK.
| | | | | | - Nicholas Smirnoff
- Biosciences, College of Life and Environmental Sciences, University of Exeter, Geoffrey Pope Building, Stocker Road, Exeter EX4 4QD, UK
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Cook J, Zhang J, Norrie J, Blal B, Cheng Z. Seaweed Extract (Stella Maris ®) Activates Innate Immune Responses in Arabidopsis thaliana and Protects Host against Bacterial Pathogens. Mar Drugs 2018; 16:E221. [PMID: 29958402 PMCID: PMC6071235 DOI: 10.3390/md16070221] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 06/19/2018] [Accepted: 06/27/2018] [Indexed: 12/20/2022] Open
Abstract
Insects and pathogenic infections (bacteria, viruses and fungi) cause huge losses in agriculturally important crops yearly. Due to the rise in pesticide and antibiotic resistance, our crops and livestock are increasingly at risk. There is a rising demand for environmentally friendly solutions to prevent crop decreases. Components of Ascophyllum nodosum seaweed extracts were recently found to boost plant immunity. The stimulatory activities of the A.nodosum marine alga-derived extract (Stella Maris®) were investigated in a broad range of immune assays. Elevated hydrogen peroxide production measured in a chemiluminescence assay suggested that the extract elicited a strong burst of reactive oxygen species. Arabidopsis seedlings treated with Stella Maris® activated the expression of WRKY30, CYP71A12 and PR-1 genes, the induction of which represent early, mid and late plant immune response, respectively. Finally, this study found that Stella Maris® inhibited the growth of multiple bacterial pathogens, including an opportunistic human pathogen that has demonstrated pathogenicity in plants. In summary, the pre-treatment with the seaweed extract protected Arabidopsis against subsequent infection by these pathogens.
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Affiliation(s)
- Jamie Cook
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS B3H 4R2, Canada.
| | - Janie Zhang
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS B3H 4R2, Canada.
| | - Jeff Norrie
- Acadian Seaplants Limited, 30 Brown Avenue, Dartmouth, NS B3B 1X8, Canada.
| | - Bachar Blal
- Acadian Seaplants Limited, 30 Brown Avenue, Dartmouth, NS B3B 1X8, Canada.
| | - Zhenyu Cheng
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS B3H 4R2, Canada.
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He H, Van Breusegem F, Mhamdi A. Redox-dependent control of nuclear transcription in plants. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:3359-3372. [PMID: 29659979 DOI: 10.1093/jxb/ery130] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Accepted: 03/27/2018] [Indexed: 05/03/2023]
Abstract
Redox-dependent regulatory networks are affected by altered cellular or extracellular levels of reactive oxygen species (ROS). Perturbations of ROS production and scavenging homeostasis have a considerable impact on the nuclear transcriptome. While the regulatory mechanisms by which ROS modulate gene transcription in prokaryotes, lower eukaryotes, and mammalian cells are well established, new insights into the mechanism underlying redox control of gene expression in plants have only recently been known. In this review, we aim to provide an overview of the current knowledge on how ROS and thiol-dependent transcriptional regulatory networks are controlled. We assess the impact of redox perturbations and oxidative stress on transcriptome adjustments using cat2 mutants as a model system and discuss how redox homeostasis can modify the various parts of the transcriptional machinery.
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Affiliation(s)
- Huaming He
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Gent, Belgium
- Center for Plant Systems Biology, VIB, Gent, Belgium
| | - Frank Van Breusegem
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Gent, Belgium
- Center for Plant Systems Biology, VIB, Gent, Belgium
| | - Amna Mhamdi
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Gent, Belgium
- Center for Plant Systems Biology, VIB, Gent, Belgium
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Hydrogen Peroxide Response in Leaves of Poplar (Populus simonii × Populus nigra) Revealed from Physiological and Proteomic Analyses. Int J Mol Sci 2017; 18:ijms18102085. [PMID: 28974034 PMCID: PMC5666767 DOI: 10.3390/ijms18102085] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 09/25/2017] [Accepted: 09/26/2017] [Indexed: 11/17/2022] Open
Abstract
Hydrogen peroxide (H₂O₂) is one of the most abundant reactive oxygen species (ROS), which plays dual roles as a toxic byproduct of cell metabolism and a regulatory signal molecule in plant development and stress response. Populus simonii × Populus nigra is an important cultivated forest species with resistance to cold, drought, insect and disease, and also a key model plant for forest genetic engineering. In this study, H₂O₂ response in P. simonii × P. nigra leaves was investigated using physiological and proteomics approaches. The seedlings of 50-day-old P. simonii × P. nigra under H₂O₂ stress exhibited stressful phenotypes, such as increase of in vivo H₂O₂ content, decrease of photosynthetic rate, elevated osmolytes, antioxidant accumulation, as well as increased activities of several ROS scavenging enzymes. Besides, 81 H₂O₂-responsive proteins were identified in the poplar leaves. The diverse abundant patterns of these proteins highlight the H₂O₂-responsive pathways in leaves, including 14-3-3 protein and nucleoside diphosphate kinase (NDPK)-mediated signaling, modulation of thylakoid membrane structure, enhancement of various ROS scavenging pathways, decrease of photosynthesis, dynamics of proteins conformation, and changes in carbohydrate and other metabolisms. This study provides valuable information for understanding H₂O₂-responsive mechanisms in leaves of P. simonii × P. nigra.
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Zhang H, Lv S, Xu H, Hou D, Li Y, Wang F. H₂O₂ Is Involved in the Metallothionein-Mediated Rice Tolerance to Copper and Cadmium Toxicity. Int J Mol Sci 2017; 18:ijms18102083. [PMID: 28974021 PMCID: PMC5666765 DOI: 10.3390/ijms18102083] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 09/27/2017] [Accepted: 09/27/2017] [Indexed: 11/16/2022] Open
Abstract
Cadmium (Cd) and excess copper (Cu) are toxic to plants, causing a wide range of deleterious effects including the formation of reactive oxygen species. Metallothioneins (MTs) may protect plant cells from heavy metal toxicity by chelating heavy metals via cysteine thiol groups. They may also function as antioxidants. The study investigated the relationship of H₂O₂ production and ricMT expression in rice radicles and rice suspension cells under Cu or Cd stress. The results showed that H₂O₂ production in the rice radicles increased before Cu-induced ricMT expression, and after Cd-induced ricMT expression. Rice suspension cells of sense- and antisense-ricMT transgenic lines were obtained by an Agrobacterium-mediated transformation. Overexpression of ricMT significantly decreased the death rate of rice cells, which was accompanied by blocked H₂O₂ accumulation in rice suspension cells subject to Cu and Cd stress. Our findings confirm that H₂O₂ is involved in the MT-mediated tolerance of Cu and Cd toxicity in rice.
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Affiliation(s)
- Hongxiao Zhang
- College of Agriculture, Henan University of Science and Technology, Luoyang 471023, China.
| | - Shufang Lv
- College of Agriculture, Henan University of Science and Technology, Luoyang 471023, China.
| | - Huawei Xu
- College of Agriculture, Henan University of Science and Technology, Luoyang 471023, China.
| | - Dianyun Hou
- College of Agriculture, Henan University of Science and Technology, Luoyang 471023, China.
| | - Youjun Li
- College of Agriculture, Henan University of Science and Technology, Luoyang 471023, China.
| | - Fayuan Wang
- College of Agriculture, Henan University of Science and Technology, Luoyang 471023, China.
- College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
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Garcia-Molina A, Altmann M, Alkofer A, Epple PM, Dangl JL, Falter-Braun P. LSU network hubs integrate abiotic and biotic stress responses via interaction with the superoxide dismutase FSD2. JOURNAL OF EXPERIMENTAL BOTANY 2017; 68:1185-1197. [PMID: 28207043 PMCID: PMC5441861 DOI: 10.1093/jxb/erw498] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
In natural environments, plants often experience different stresses simultaneously, and adverse abiotic conditions can weaken the plant immune system. Interactome mapping revealed that the LOW SULPHUR UPREGULATED (LSU) proteins are hubs in an Arabidopsis protein interaction network that are targeted by virulence effectors from evolutionarily diverse pathogens. Here we show that LSU proteins are up-regulated in several abiotic and biotic stress conditions, such as nutrient depletion or salt stress, by both transcriptional and post-translational mechanisms. Interference with LSU expression prevents chloroplastic reactive oxygen species (ROS) production and proper stomatal closure during sulphur stress. We demonstrate that LSU1 interacts with the chloroplastic superoxide dismutase FSD2 and stimulates its enzymatic activity in vivo and in vitro. Pseudomonas syringae virulence effectors interfere with this interaction and preclude re-localization of LSU1 to chloroplasts. We demonstrate that reduced LSU levels cause a moderately enhanced disease susceptibility in plants exposed to abiotic stresses such as nutrient deficiency, high salinity, or heavy metal toxicity, whereas LSU1 overexpression confers significant disease resistance in several of these conditions. Our data suggest that the network hub LSU1 plays an important role in co-ordinating plant immune responses across a spectrum of abiotic stress conditions.
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Affiliation(s)
- Antoni Garcia-Molina
- Technische Universität München (TUM), School for Life Sciences Weihenstephan (WZW), Plant Systems Biology, Emil-Ramann-Straße, 4, D-85354 Freising, Germany
| | - Melina Altmann
- Technische Universität München (TUM), School for Life Sciences Weihenstephan (WZW), Plant Systems Biology, Emil-Ramann-Straße, 4, D-85354 Freising, Germany
| | - Angela Alkofer
- Technische Universität München (TUM), School for Life Sciences Weihenstephan (WZW), Plant Systems Biology, Emil-Ramann-Straße, 4, D-85354 Freising, Germany
| | - Petra M Epple
- Howard Hughes Medical Institute and Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Jeffery L Dangl
- BASF Plant Science LP, Research Triangle Park, NC 27709, USA
| | - Pascal Falter-Braun
- Institute of Network Biology (INET), Helmholtz Zentrum München (HMGU), German Research Center for Environmental Health, 85764 Neuherberg, Germany
- Department of Microbe-Host Interactions, Ludwig-Maximilians-Universität München (LMU Munich), Planegg-Martinsried, Germany
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Liu N, Zhang X, Sun Y, Wang P, Li X, Pei Y, Li F, Hou Y. Molecular evidence for the involvement of a polygalacturonase-inhibiting protein, GhPGIP1, in enhanced resistance to Verticillium and Fusarium wilts in cotton. Sci Rep 2017; 7:39840. [PMID: 28079053 PMCID: PMC5228132 DOI: 10.1038/srep39840] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 11/29/2016] [Indexed: 01/29/2023] Open
Abstract
Polygalacturonase-inhibiting protein (PGIP), belonging to a group of plant defence proteins, specifically inhibits endopolygalacturonases secreted by pathogens. Herein, we showed that purified GhPGIP1 is a functional inhibitor of Verticillium dahliae and Fusarium oxysporum f. sp. vasinfectum, the two fungal pathogens causing cotton wilt. Transcription of GhPGIP1 was increased in cotton upon infection, wounding, and treatment with defence hormone and H2O2. Resistance by GhPGIP1 was examined by its virus-induced gene silencing in cotton and overexpression in Arabidopsis. GhPGIP1-silenced cotton was highly susceptible to the infections. GhPGIP1 overexpression in transgenic Arabidopsis conferred resistance to the infection, accompanied by enhanced expression of pathogenesis-related proteins (PRs), isochorismate synthase 1 (ICS1), enhanced disease susceptibility 1 (EDS1), and phytoalexin-deficient 4 (PAD4) genes. Transmission electron microscopy revealed cell wall alteration and cell disintegration in plants inoculated with polygalacturonase (PGs), implying its role in damaging the cell wall. Docking studies showed that GhPGIP1 interacted strongly with C-terminal of V. dahliae PG1 (VdPG1) beyond the active site but weakly interacted with C-terminal of F. oxysporum f. sp. vasinfectum (FovPG1). These findings will contribute towards the understanding of the roles of PGIPs and in screening potential combat proteins with novel recognition specificities against evolving pathogenic factors for countering pathogen invasion.
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Affiliation(s)
- Nana Liu
- College of Science, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, People’s Republic of China
| | - Xueyan Zhang
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of the Chinese Academy of Agricultural Sciences, Anyang 455000, People’s Republic of China
| | - Yun Sun
- College of Science, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, People’s Republic of China
| | - Ping Wang
- College of Science, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, People’s Republic of China
| | - Xiancai Li
- College of Science, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, People’s Republic of China
| | - Yakun Pei
- College of Science, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, People’s Republic of China
| | - Fuguang Li
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of the Chinese Academy of Agricultural Sciences, Anyang 455000, People’s Republic of China
| | - Yuxia Hou
- College of Science, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, People’s Republic of China
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Xu Q, Xu X, Shi Y, Qi X, Chen X. Elucidation of the molecular responses of a cucumber segment substitution line carrying Pm5.1 and its recurrent parent triggered by powdery mildew by comparative transcriptome profiling. BMC Genomics 2017; 18:21. [PMID: 28056792 PMCID: PMC5217421 DOI: 10.1186/s12864-016-3438-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Accepted: 12/19/2016] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Powdery mildew (PM) is one of the most severe fungal diseases of cucurbits, but the molecular mechanisms underlying PM resistance in cucumber remain elusive. In this study, we developed a PM resistant segment substitution line SSL508-28 that carried a segment on chromosome five representing the Pm5.1 locus from PM resistant donor Jin5-508 using marker-assisted backcrossing of an elite PM susceptible cucumber inbred line D8. RESULTS Whole-genome resequencing of SSL508-28, Jin5-508 and D8 was performed to identify the exact boundaries of the breakpoints for this introgression because of the low density of available single sequence repeat markers. This led to the identification of a ~6.8 Mb substituted segment predicted to contain 856 genes. RNA-seq was used to study gene expression differences in PM treated (plants harvested 48 h after inoculation) and untreated (control) SSL508-28 and D8 lines. Exactly 1,248 and 1,325 differentially expressed genes (DEGs) were identified in SSL508-28 and D8, respectively. Of those, 88 DEGs were located in the ~6.8 Mb segment interval. Based on expression data and annotation, we identified 8 potential candidate genes that may participate in PM resistance afforded by Pm5.1, including two tandemly arrayed genes encoding receptor protein kinases, two transcription factors, two genes encoding remorin proteins, one gene encoding a P-type ATPase and one gene encoding a 70 kDa heat shock protein. The transcriptome data also revealed a complex regulatory network for Pm5.1-mediated PM resistance that may involve multiple signal regulators and transducers, cell wall modifications and the salicylic acid signaling pathway. CONCLUSION These findings shed light on the cucumber PM defense mechanisms mediated by Pm5.1 and provided valuable information for the fine mapping of Pm5.1 and breeding of cucumber with enhanced resistance to PM.
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Affiliation(s)
- Qiang Xu
- Department of horticulture, School of horticulture and plant protection, Yangzhou University, 48 east wenhui road, Yangzhou, Jiangsu 225009 China
| | - Xuewen Xu
- Department of horticulture, School of horticulture and plant protection, Yangzhou University, 48 east wenhui road, Yangzhou, Jiangsu 225009 China
| | - Yang Shi
- Department of horticulture, School of horticulture and plant protection, Yangzhou University, 48 east wenhui road, Yangzhou, Jiangsu 225009 China
| | - Xiaohua Qi
- Department of horticulture, School of horticulture and plant protection, Yangzhou University, 48 east wenhui road, Yangzhou, Jiangsu 225009 China
| | - Xuehao Chen
- Department of horticulture, School of horticulture and plant protection, Yangzhou University, 48 east wenhui road, Yangzhou, Jiangsu 225009 China
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Shaikhali J, Wingsle G. Redox-regulated transcription in plants: Emerging concepts. AIMS MOLECULAR SCIENCE 2017. [DOI: 10.3934/molsci.2017.3.301] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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Mohanta TK, Park YH, Bae H. Novel Genomic and Evolutionary Insight of WRKY Transcription Factors in Plant Lineage. Sci Rep 2016; 6:37309. [PMID: 27853303 PMCID: PMC5112548 DOI: 10.1038/srep37309] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Accepted: 10/27/2016] [Indexed: 11/22/2022] Open
Abstract
The evolutionarily conserved WRKY transcription factor (TF) regulates different aspects of gene expression in plants, and modulates growth, development, as well as biotic and abiotic stress responses. Therefore, understanding the details regarding WRKY TFs is very important. In this study, large-scale genomic analyses of the WRKY TF gene family from 43 plant species were conducted. The results of our study revealed that WRKY TFs could be grouped and specifically classified as those belonging to the monocot or dicot plant lineage. In this study, we identified several novel WRKY TFs. To our knowledge, this is the first report on a revised grouping system of the WRKY TF gene family in plants. The different forms of novel chimeric forms of WRKY TFs in the plant genome might play a crucial role in their evolution. Tissue-specific gene expression analyses in Glycine max and Phaseolus vulgaris showed that WRKY11-1, WRKY11-2 and WRKY11-3 were ubiquitously expressed in all tissue types, and WRKY15-2 was highly expressed in the stem, root, nodule and pod tissues in G. max and P. vulgaris.
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Affiliation(s)
- Tapan Kumar Mohanta
- Free Major of Natural Sciences, College of Basic Studies, Yeungnam University, Gyeongsan, 38541, Republic of Korea
| | - Yong-Hwan Park
- School of Biotechnology, Yeungnam University, Gyeongsan, 38541, Republic of Korea
| | - Hanhong Bae
- School of Biotechnology, Yeungnam University, Gyeongsan, 38541, Republic of Korea
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48
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Zhu T, Deng X, Zhou X, Zhu L, Zou L, Li P, Zhang D, Lin H. Ethylene and hydrogen peroxide are involved in brassinosteroid-induced salt tolerance in tomato. Sci Rep 2016; 6:35392. [PMID: 27739520 PMCID: PMC5064326 DOI: 10.1038/srep35392] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 09/29/2016] [Indexed: 11/09/2022] Open
Abstract
Crosstalk between phytohormone pathways is essential in plant growth, development and stress responses. Brassinosteroids (BRs) and ethylene are both pivotal plant growth regulators, and the interaction between these two phytohormones in the tomato response to salt stress is still unclear. Here, we explored the mechanism by which BRs affect ethylene biosynthesis and signaling in tomato seedlings under salt stress. The activity of 1-aminocyclopropane-1-carboxylate synthase (ACS), an ethylene synthesis enzyme, and the ethylene signaling pathway were activated in plants pretreated with BRs. Scavenging of ethylene production or silencing of ethylene signaling components inhibited BR-induced salt tolerance and blocked BR-induced activities of several antioxidant enzymes. Previous studies have reported that BRs can induce plant tolerance to a variety of environmental stimuli by triggering the generation of H2O2 as a signaling molecule. We also found that H2O2 might be involved in the crosstalk between BRs and ethylene in the tomato response to salt stress. Simultaneously, BR-induced ethylene production was partially blocked by pretreated with a reactive oxygen species scavenger or synthesis inhibitor. These results strongly demonstrated that ethylene and H2O2 play important roles in BR-dependent induction of plant salt stress tolerance. Furthermore, we also investigated the relationship between BR signaling and ethylene signaling pathways in plant processes responding to salt stress.
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Affiliation(s)
- Tong Zhu
- Ministry of Education, Key Laboratory for Bio-Resource and Eco-Environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, Sichuan, China
| | - Xingguang Deng
- Ministry of Education, Key Laboratory for Bio-Resource and Eco-Environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, Sichuan, China
| | - Xue Zhou
- Ministry of Education, Key Laboratory for Bio-Resource and Eco-Environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, Sichuan, China
| | - Lisha Zhu
- Ministry of Education, Key Laboratory for Bio-Resource and Eco-Environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, Sichuan, China
| | - Lijuan Zou
- Ministry of Education, Key Laboratory for Bio-Resource and Eco-Environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, Sichuan, China
| | - Pengxu Li
- Ministry of Education, Key Laboratory for Bio-Resource and Eco-Environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, Sichuan, China
| | - Dawei Zhang
- Ministry of Education, Key Laboratory for Bio-Resource and Eco-Environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, Sichuan, China
| | - Honghui Lin
- Ministry of Education, Key Laboratory for Bio-Resource and Eco-Environment, College of Life Science, State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu, Sichuan, China
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Ortega-Villasante C, Burén S, Barón-Sola Á, Martínez F, Hernández LE. In vivo ROS and redox potential fluorescent detection in plants: Present approaches and future perspectives. Methods 2016; 109:92-104. [DOI: 10.1016/j.ymeth.2016.07.009] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 07/08/2016] [Accepted: 07/11/2016] [Indexed: 11/16/2022] Open
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50
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Zhou JY, Li X, Zhao D, Deng-Wang MY, Dai CC. Reactive oxygen species and hormone signaling cascades in endophytic bacterium induced essential oil accumulation in Atractylodes lancea. PLANTA 2016; 244:699-712. [PMID: 27125387 DOI: 10.1007/s00425-016-2536-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Accepted: 04/15/2016] [Indexed: 05/20/2023]
Abstract
Pseudomonas fluorescens induces gibberellin and ethylene signaling via hydrogen peroxide in planta . Ethylene activates abscisic acid signaling. Hormones increase sesquiterpenoid biosynthesis gene expression and enzyme activity, inducing essential oil accumulation. Atractylodes lancea is a famous Chinese medicinal plant, whose main active components are essential oils. Wild A. lancea has become endangered due to habitat destruction and over-exploitation. Although cultivation can ensure production of the medicinal material, the essential oil content in cultivated A. lancea is significantly lower than that in the wild herb. The application of microbes as elicitors has become an effective strategy to increase essential oil accumulation in cultivated A. lancea. Our previous study identified an endophytic bacterium, Pseudomonas fluorescens ALEB7B, which can increase essential oil accumulation in A. lancea more efficiently than other endophytes; however, the underlying mechanisms remain unknown (Physiol Plantarum 153:30-42, 2015; Appl Environ Microb 82:1577-1585, 2016). This study demonstrates that P. fluorescens ALEB7B firstly induces hydrogen peroxide (H2O2) signaling in A. lancea, which then simultaneously activates gibberellin (GA) and ethylene (ET) signaling. Subsequently, ET activates abscisic acid (ABA) signaling. GA and ABA signaling increase expression of HMGR and DXR, which encode key enzymes involved in sesquiterpenoid biosynthesis, leading to increased levels of the corresponding enzymes and then an accumulation of essential oils. Specific reactive oxygen species and hormone signaling cascades induced by P. fluorescens ALEB7B may contribute to high-efficiency essential oil accumulation in A. lancea. Illustrating the regulation mechanisms underlying P. fluorescens ALEB7B-induced essential oil accumulation not only provides the theoretical basis for the inducible synthesis of terpenoids in many medicinal plants, but also further reveals the complex and diverse interactions among different plants and their endophytes.
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Affiliation(s)
- Jia-Yu Zhou
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, 210023, Jiangsu, China
| | - Xia Li
- Jiangsu High Quality Rice Research and Development Center, Nanjing Branch of China National Center Rice Improvement, Institute of Food Crops, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, Jiangsu, China
| | - Dan Zhao
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, 210023, Jiangsu, China
| | - Meng-Yao Deng-Wang
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, 210023, Jiangsu, China
| | - Chuan-Chao Dai
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, 210023, Jiangsu, China.
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