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Cao Y, Zhang Q, Liu Y, Yan T, Ding L, Yang Y, Meng Y, Shan W. The RXLR effector PpE18 of Phytophthora parasitica is a virulence factor and suppresses peroxisome membrane-associated ascorbate peroxidase NbAPX3-1-mediated plant immunity. THE NEW PHYTOLOGIST 2024; 243:1472-1489. [PMID: 38877698 DOI: 10.1111/nph.19902] [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: 12/27/2023] [Accepted: 05/28/2024] [Indexed: 06/16/2024]
Abstract
Phytophthora parasitica causes diseases on a broad range of host plants. It secretes numerous effectors to suppress plant immunity. However, only a few virulence effectors in P. parasitica have been characterized. Here, we highlight that PpE18, a conserved RXLR effector in P. parasitica, was a virulence factor and suppresses Nicotiana benthamiana immunity. Utilizing luciferase complementation, co-immunoprecipitation, and GST pull-down assays, we determined that PpE18 targeted NbAPX3-1, a peroxisome membrane-associated ascorbate peroxidase with reactive oxygen species (ROS)-scavenging activity and positively regulates plant immunity in N. benthamiana. We show that the ROS-scavenging activity of NbAPX3-1 was critical for its immune function and was hindered by the binding of PpE18. The interaction between PpE18 and NbAPX3-1 resulted in an elevation of ROS levels in the peroxisome. Moreover, we discovered that the ankyrin repeat-containing protein NbANKr2 acted as a positive immune regulator, interacting with both NbAPX3-1 and PpE18. NbANKr2 was required for NbAPX3-1-mediated disease resistance. PpE18 competitively interfered with the interaction between NbAPX3-1 and NbANKr2, thereby weakening plant resistance. Our results reveal an effective counter-defense mechanism by which P. parasitica employed effector PpE18 to suppress host cellular defense, by suppressing biochemical activity and disturbing immune function of NbAPX3-1 during infection.
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Affiliation(s)
- Yimeng Cao
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, and College of Agronomy, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Qiang Zhang
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, and College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Yuan Liu
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, and College of Agronomy, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Tiantian Yan
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, and College of Agronomy, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Liwen Ding
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, and College of Agronomy, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Yang Yang
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, and College of Agronomy, Northwest A&F University, Yangling, Shaanxi, 712100, China
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, and College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Yuling Meng
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, and College of Agronomy, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Weixing Shan
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, and College of Agronomy, Northwest A&F University, Yangling, Shaanxi, 712100, China
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2
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González-Gordo S, López-Jaramillo J, Rodríguez-Ruiz M, Taboada J, Palma JM, Corpas FJ. Pepper catalase: a broad analysis of its modulation during fruit ripening and by nitric oxide. Biochem J 2024; 481:883-901. [PMID: 38884605 DOI: 10.1042/bcj20240247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2024] [Revised: 06/13/2024] [Accepted: 06/17/2024] [Indexed: 06/18/2024]
Abstract
Catalase is a major antioxidant enzyme located in plant peroxisomes that catalyzes the decomposition of H2O2. Based on our previous transcriptomic (RNA-Seq) and proteomic (iTRAQ) data at different stages of pepper (Capsicum annuum L.) fruit ripening and after exposure to nitric oxide (NO) enriched atmosphere, a broad analysis has allowed us to characterize the functioning of this enzyme. Three genes were identified, and their expression was differentially modulated during ripening and by NO gas treatment. A dissimilar behavior was observed in the protein expression of the encoded protein catalases (CaCat1-CaCat3). Total catalase activity was down-regulated by 50% in ripe (red) fruits concerning immature green fruits. This was corroborated by non-denaturing polyacrylamide gel electrophoresis, where only a single catalase isozyme was identified. In vitro analyses of the recombinant CaCat3 protein exposed to peroxynitrite (ONOO-) confirmed, by immunoblot assay, that catalase underwent a nitration process. Mass spectrometric analysis identified that Tyr348 and Tyr360 were nitrated by ONOO-, occurring near the active center of catalase. The data indicate the complex regulation at gene and protein levels of catalase during the ripening of pepper fruits, with activity significantly down-regulated in ripe fruits. Nitration seems to play a key role in this down-regulation, favoring an increase in H2O2 content during ripening. This pattern can be reversed by the exogenous NO application. While plant catalases are generally reported to be tetrameric, the analysis of the protein structure supports that pepper catalase has a favored quaternary homodimer nature. Taken together, data show that pepper catalase is down-regulated during fruit ripening, becoming a target of tyrosine nitration, which provokes its inhibition.
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Affiliation(s)
- Salvador González-Gordo
- Group of Antioxidants, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Stress, Development and Signaling in Plants, Estación Experimental del Zaidín, Spanish National Research Council (CSIC), Profesor Albareda 1, E-18008 Granada, Spain Granada, Spain
| | | | - Marta Rodríguez-Ruiz
- Group of Antioxidants, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Stress, Development and Signaling in Plants, Estación Experimental del Zaidín, Spanish National Research Council (CSIC), Profesor Albareda 1, E-18008 Granada, Spain Granada, Spain
| | - Jorge Taboada
- Group of Antioxidants, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Stress, Development and Signaling in Plants, Estación Experimental del Zaidín, Spanish National Research Council (CSIC), Profesor Albareda 1, E-18008 Granada, Spain Granada, Spain
| | - José M Palma
- Group of Antioxidants, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Stress, Development and Signaling in Plants, Estación Experimental del Zaidín, Spanish National Research Council (CSIC), Profesor Albareda 1, E-18008 Granada, Spain Granada, Spain
| | - Francisco J Corpas
- Group of Antioxidants, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Stress, Development and Signaling in Plants, Estación Experimental del Zaidín, Spanish National Research Council (CSIC), Profesor Albareda 1, E-18008 Granada, Spain Granada, Spain
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3
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Geng A, Lian W, Wang Y, Liu M, Zhang Y, Wang X, Chen G. Molecular Mechanisms and Regulatory Pathways Underlying Drought Stress Response in Rice. Int J Mol Sci 2024; 25:1185. [PMID: 38256261 PMCID: PMC10817035 DOI: 10.3390/ijms25021185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2023] [Revised: 01/10/2024] [Accepted: 01/16/2024] [Indexed: 01/24/2024] Open
Abstract
Rice is a staple food for 350 million people globally. Its yield thus affects global food security. Drought is a serious environmental factor affecting rice growth. Alleviating the inhibition of drought stress is thus an urgent challenge that should be solved to enhance rice growth and yield. This review details the effects of drought on rice morphology, physiology, biochemistry, and the genes associated with drought stress response, their biological functions, and molecular regulatory pathways. The review further highlights the main future research directions to collectively provide theoretical support and reference for improving drought stress adaptation mechanisms and breeding new drought-resistant rice varieties.
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Affiliation(s)
- Anjing Geng
- Institute of Quality Standard and Monitoring Technology for Agro-Products of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Testing and Evaluation for Agro-Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou 510640, China
| | - Wenli Lian
- Institute of Quality Standard and Monitoring Technology for Agro-Products of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Testing and Evaluation for Agro-Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou 510640, China
| | - Yihan Wang
- Institute of Quality Standard and Monitoring Technology for Agro-Products of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Testing and Evaluation for Agro-Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou 510640, China
| | - Minghao Liu
- Institute of Quality Standard and Monitoring Technology for Agro-Products of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Testing and Evaluation for Agro-Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou 510640, China
| | - Yue Zhang
- Institute of Quality Standard and Monitoring Technology for Agro-Products of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Testing and Evaluation for Agro-Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou 510640, China
| | - Xu Wang
- Institute of Quality Standard and Monitoring Technology for Agro-Products of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Testing and Evaluation for Agro-Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou 510640, China
| | - Guang Chen
- Institute of Quality Standard and Monitoring Technology for Agro-Products of Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
- Key Laboratory of Testing and Evaluation for Agro-Product Safety and Quality, Ministry of Agriculture and Rural Affairs, Guangzhou 510640, China
- Guangdong Provincial Key Laboratory of Quality & Safety Risk Assessment for Agro-Products, Guangzhou 510640, China
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4
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Sousa RH, Carvalho FE, Daloso DM, Lima-Melo Y, Margis-Pinheiro M, Komatsu S, Silveira JA. Impairment in photosynthesis induced by CAT inhibition depends on the intensity of photorespiration and peroxisomal APX expression in rice. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 203:108066. [PMID: 37797384 DOI: 10.1016/j.plaphy.2023.108066] [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: 06/26/2023] [Revised: 09/12/2023] [Accepted: 09/28/2023] [Indexed: 10/07/2023]
Abstract
We have previously shown that rice plants silenced for peroxisomal ascorbate peroxidase (OsAPX4-RNAi) display higher resilience to photosynthesis under oxidative stress and photorespiratory conditions. However, the redox mechanisms underlying that intriguing response remain unknown. Here, we tested the hypothesis that favorable effects triggered by peroxisomal APX deficiency on photosynthesis resilience under CAT inhibition are dependent on the intensity of photorespiration associated with the abundance of photosynthetic and redox proteins. Non-transformed (NT) and OsAPX4-RNAi silenced rice plants were grown under ambient (AC) or high CO2 (HC) conditions and subjected to 3-amino-1,2,4-triazole (3-AT)-mediated CAT activity inhibition. Photosynthetic measurements evidenced that OsAPX4-RNAi plants simultaneously exposed to CAT inhibition and HC lost the previously acquired advantage in photosynthesis resilience displayed under AC. Silenced plants exposed to environment photorespiration and CAT inhibition presented lower photorespiration as indicated by smaller Gly/Ser and Jo/Jc ratios and glycolate oxidase activity. Interestingly, when these silenced plants were exposed to HC and CAT-inhibition, they exhibited an inverse response compared to AC in terms of photorespiration indicators, associated with higher accumulation of proteins. Multivariate and correlation network analyses suggest that the proteomics changes induced by HC combined with CAT inhibition are substantially different between NT and OsAPX4-RNAi plants. Our results suggest that the intensity of photorespiration and peroxisomal APX-mediated redox signaling are tightly regulated under CAT inhibition induced oxidative stress, which can modulate the photosynthetic efficiency, possibly via a coordinated regulation of protein abundance and rearrangement, ultimately triggered by crosstalk involving H2O2 levels related to CAT and APX activities in peroxisomes.
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Affiliation(s)
- Rachel Hv Sousa
- Center of Agricultural Sciences and Biodiversity, Federal University of Cariri, Brazil
| | - Fabricio El Carvalho
- Colombian Corporation for Agricultural Research (AGROSAVIA), CI La Suiza, Rionegro, Colombia
| | - Danilo M Daloso
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Yugo Lima-Melo
- Department of Botany, Federal University of Rio Grande Do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Marcia Margis-Pinheiro
- Department of Genetics, Federal University of Rio Grande Do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Setsuko Komatsu
- Faculty of Environmental and Information Sciences, Fukui University of Technology, Fukui, Japan
| | - Joaquim Ag Silveira
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza, Ceará, Brazil.
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5
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Souza PVL, Hou LY, Sun H, Poeker L, Lehman M, Bahadar H, Domingues-Junior AP, Dard A, Bariat L, Reichheld JP, Silveira JAG, Fernie AR, Timm S, Geigenberger P, Daloso DM. Plant NADPH-dependent thioredoxin reductases are crucial for the metabolism of sink leaves and plant acclimation to elevated CO 2. PLANT, CELL & ENVIRONMENT 2023. [PMID: 37267089 DOI: 10.1111/pce.14631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 05/05/2023] [Accepted: 05/13/2023] [Indexed: 06/04/2023]
Abstract
Plants contain three NADPH-thioredoxin reductases (NTR) located in the cytosol/mitochondria (NTRA/B) and the plastid (NTRC) with important metabolic functions. However, mutants deficient in all NTRs remained to be investigated. Here, we generated and characterised the triple Arabidopsis ntrabc mutant alongside with ntrc single and ntrab double mutants under different environmental conditions. Both ntrc and ntrabc mutants showed reduced growth and substantial metabolic alterations, especially in sink leaves and under high CO2 (HC), as compared to the wild type. However, ntrabc showed higher effective quantum yield of PSII under both constant and fluctuating light conditions, altered redox states of NADH/NAD+ and glutathione (GSH/GSSG) and lower potential quantum yield of PSII in sink leaves in ambient but not high CO2 concentrations, as compared to ntrc, suggesting a functional interaction between chloroplastic and extra-chloroplastic NTRs in photosynthesis regulation depending on leaf development and environmental conditions. Our results unveil a previously unknown role of the NTR system in regulating sink leaf metabolism and plant acclimation to HC, while it is not affecting full plant development, indicating that the lack of the NTR system can be compensated, at least to some extent, by other redox mechanisms.
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Affiliation(s)
- Paulo V L Souza
- LabPlant, Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza, Brazil
| | - Liang-Yu Hou
- Ludwig-Maximilians-University Munich, Planegg-Martinsried, Germany
| | - Hu Sun
- University of Rostock, Rostock, Germany
| | - Louis Poeker
- Ludwig-Maximilians-University Munich, Planegg-Martinsried, Germany
| | - Martin Lehman
- Ludwig-Maximilians-University Munich, Planegg-Martinsried, Germany
| | - Humaira Bahadar
- LabPlant, Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza, Brazil
| | | | - Avilien Dard
- Laboratoire Génome et Développement des Plantes, Unité Mixte de Recherche 5096, Centre National de la Recherche Scientifique, Université de Perpignan Via Domitia, Perpignan, France
| | - Laetitia Bariat
- Laboratoire Génome et Développement des Plantes, Unité Mixte de Recherche 5096, Centre National de la Recherche Scientifique, Université de Perpignan Via Domitia, Perpignan, France
| | - Jean-Philippe Reichheld
- Laboratoire Génome et Développement des Plantes, Unité Mixte de Recherche 5096, Centre National de la Recherche Scientifique, Université de Perpignan Via Domitia, Perpignan, France
| | | | | | | | | | - Danilo M Daloso
- LabPlant, Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza, Brazil
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6
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Lin D, Zhou X, Zhao H, Tao X, Yu S, Zhang X, Zang Y, Peng L, Yang L, Deng S, Li X, Mao X, Luan A, He J, Ma J. The Synergistic Mechanism of Photosynthesis and Antioxidant Metabolism between the Green and White Tissues of Ananas comosus var. bracteatus Chimeric Leaves. Int J Mol Sci 2023; 24:ijms24119238. [PMID: 37298190 DOI: 10.3390/ijms24119238] [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: 03/21/2023] [Revised: 04/30/2023] [Accepted: 05/03/2023] [Indexed: 06/12/2023] Open
Abstract
Ananas comosus var. bracteatus (Ac. bracteatus) is a typical leaf-chimeric ornamental plant. The chimeric leaves are composed of central green photosynthetic tissue (GT) and marginal albino tissue (AT). The mosaic existence of GT and AT makes the chimeric leaves an ideal material for the study of the synergistic mechanism of photosynthesis and antioxidant metabolism. The daily changes in net photosynthetic rate (NPR) and stomatal conductance (SCT) of the leaves indicated the typical crassulacean acid metabolism (CAM) characteristic of Ac. bracteatus. Both the GT and AT of chimeric leaves fixed CO2 during the night and released CO2 from malic acid for photosynthesis during the daytime. The malic acid content and NADPH-ME activity of the AT during the night was significantly higher than that of GT, which suggests that the AT may work as a CO2 pool to store CO2 during the night and supply CO2 for photosynthesis in the GT during the daytime. Furthermore, the soluble sugar content (SSC) in the AT was significantly lower than that of GT, while the starch content (SC) of the AT was apparently higher than that of GT, indicating that AT was inefficient in photosynthesis but may function as a photosynthate sink to help the GT maintain high photosynthesis activity. Additionally, the AT maintained peroxide balance by enhancing the non-enzymatic antioxidant system and antioxidant enzyme system to avoid antioxidant damage. The enzyme activities of reductive ascorbic acid (AsA) and the glutathione (GSH) cycle (except DHAR) and superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD) were enhanced, apparently to make the AT grow normally. This study indicates that, although the AT of the chimeric leaves was inefficient at photosynthesis because of the lack of chlorophyll, it can cooperate with the GT by working as a CO2 supplier and photosynthate store to enhance the photosynthetic ability of GT to help chimeric plants grow well. Additionally, the AT can avoid peroxide damage caused by the lack of chlorophyll by enhancing the activity of the antioxidant system. The AT plays an active role in the normal growth of the chimeric leaves.
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Affiliation(s)
- Dongpu Lin
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611100, China
| | - Xuzixin Zhou
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611100, China
| | - Huan Zhao
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611100, China
| | - Xiaoguang Tao
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611100, China
| | - Sanmiao Yu
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611100, China
| | - Xiaopeng Zhang
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611100, China
| | - Yaoqiang Zang
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611100, China
| | - Lingli Peng
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611100, China
| | - Li Yang
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611100, China
| | - Shuyue Deng
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611100, China
| | - Xiyan Li
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611100, China
| | - Xinjing Mao
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611100, China
| | - Aiping Luan
- Tropical Crop Genetic Resources Institute, Chinese Academy of Agricultural Science, Haikou 571101, China
| | - Junhu He
- Tropical Crop Genetic Resources Institute, Chinese Academy of Agricultural Science, Haikou 571101, China
| | - Jun Ma
- College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611100, China
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7
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Jardim-Messeder D, Caverzan A, Bastos GA, Galhego V, Souza-Vieira YD, Lazzarotto F, Felix-Mendes E, Lavaquial L, Nicomedes Junior J, Margis-Pinheiro M, Sachetto-Martins G. Genome-wide, evolutionary, and functional analyses of ascorbate peroxidase (APX) family in Poaceae species. Genet Mol Biol 2022; 46:e20220153. [PMID: 36512713 DOI: 10.1590/1678-4685-gmb-2022-0153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 10/06/2022] [Indexed: 12/14/2022] Open
Abstract
Ascorbate peroxidases (APXs) are heme peroxidases involved in the control of hydrogen peroxide levels and signal transduction pathways related to development and stress responses. Here, a total of 238 APX, 30 APX-related (APX-R), and 34 APX-like (APX-L) genes were identified from 24 species from the Poaceae family. Phylogenetic analysis of APX indicated five distinct clades, equivalent to cytosolic (cAPX), peroxisomal (pAPX), mitochondrial (mitAPX), stromal (sAPX), and thylakoidal (tAPX) isoforms. Duplication events contributed to the expansion of this family and the divergence times. Different from other APX isoforms, the emergence of Poaceae mitAPXs occurred independently after eudicot and monocot divergence. Our results showed that the constitutive silencing of mitAPX genes is not viable in rice plants, suggesting that these isoforms are essential for rice regeneration or development. We also obtained rice plants silenced individually to sAPX isoforms, demonstrating that, different to plants double silenced to both sAPX and tAPX or single silenced to tAPX previously obtained, these plants do not show changes in the total APX activity and hydrogen peroxide content in the shoot. Among rice plants silenced to different isoforms, plants silenced to cAPX showed a higher decrease in total APX activity and an increase in hydrogen peroxide levels. These results suggest that the cAPXs are the main isoforms responsible for regulating hydrogen peroxide levels in the cell, whereas in the chloroplast, this role is provided mainly by the tAPX isoform. In addition to broadening our understanding of the core components of the antioxidant defense in Poaceae species, the present study also provides a platform for their functional characterization.
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Affiliation(s)
- Douglas Jardim-Messeder
- Universidade Federal do Rio de Janeiro, Departamento de Genética, Rio de Janeiro, RJ, Brazil.,Universidade Federal do Rio de Janeiro, Instituto de Bioquímica Médica, Rio de Janeiro, RJ, Brazil
| | - Andreia Caverzan
- Universidade Federal do Rio Grande do Sul, Departamento de Genética, Porto Alegre, RS, Brazil
| | - Gabriel Afonso Bastos
- Universidade Federal do Rio de Janeiro, Departamento de Genética, Rio de Janeiro, RJ, Brazil
| | - Vanessa Galhego
- Universidade Federal do Rio de Janeiro, Departamento de Genética, Rio de Janeiro, RJ, Brazil
| | - Ygor de Souza-Vieira
- Universidade Federal do Rio de Janeiro, Departamento de Genética, Rio de Janeiro, RJ, Brazil
| | - Fernanda Lazzarotto
- Universidade Federal do Rio Grande do Sul, Departamento de Genética, Porto Alegre, RS, Brazil
| | - Esther Felix-Mendes
- Universidade Federal do Rio de Janeiro, Departamento de Genética, Rio de Janeiro, RJ, Brazil
| | - Lucas Lavaquial
- Universidade Federal do Rio de Janeiro, Departamento de Genética, Rio de Janeiro, RJ, Brazil
| | - José Nicomedes Junior
- Universidade Federal do Rio de Janeiro, Departamento de Genética, Rio de Janeiro, RJ, Brazil
| | - Márcia Margis-Pinheiro
- Universidade Federal do Rio Grande do Sul, Departamento de Genética, Porto Alegre, RS, Brazil.,Universidade Federal do Rio Grande do Sul, Centro de Biotecnologia, Porto Alegre, RS, Brazil
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8
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Pan R, Liu J, Wang S, Hu J. Peroxisomes: versatile organelles with diverse roles in plants. THE NEW PHYTOLOGIST 2020; 225:1410-1427. [PMID: 31442305 DOI: 10.1111/nph.16134] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 08/08/2019] [Indexed: 05/18/2023]
Abstract
Peroxisomes are small, ubiquitous organelles that are delimited by a single membrane and lack genetic material. However, these simple-structured organelles are highly versatile in morphology, abundance and protein content in response to various developmental and environmental cues. In plants, peroxisomes are essential for growth and development and perform diverse metabolic functions, many of which are carried out coordinately by peroxisomes and other organelles physically interacting with peroxisomes. Recent studies have added greatly to our knowledge of peroxisomes, addressing areas such as the diverse proteome, regulation of division and protein import, pexophagy, matrix protein degradation, solute transport, signaling, redox homeostasis and various metabolic and physiological functions. This review summarizes our current understanding of plant peroxisomes, focusing on recent discoveries. Current problems and future efforts required to better understand these organelles are also discussed. An improved understanding of peroxisomes will be important not only to the understanding of eukaryotic cell biology and metabolism, but also to agricultural efforts aimed at improving crop performance and defense.
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Affiliation(s)
- Ronghui Pan
- Seed Science Center, Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Jun Liu
- Seed Science Center, Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Saisai Wang
- Seed Science Center, Institute of Crop Science, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Jianping Hu
- MSU-Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, MI, 48824, USA
- Plant Biology Department, Michigan State University, East Lansing, MI, 48824, USA
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9
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Nepal N, Yactayo‐Chang JP, Medina‐Jiménez K, Acosta‐Gamboa LM, González‐Romero ME, Arteaga‐Vázquez MA, Lorence A. Mechanisms underlying the enhanced biomass and abiotic stress tolerance phenotype of an Arabidopsis MIOX over-expresser. PLANT DIRECT 2019; 3:e00165. [PMID: 31497751 PMCID: PMC6718051 DOI: 10.1002/pld3.165] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 07/11/2019] [Accepted: 08/10/2019] [Indexed: 05/07/2023]
Abstract
Myo-inositol oxygenase (MIOX) is the first enzyme in the inositol route to ascorbate (L-ascorbic acid, AsA, vitamin C). We have previously shown that Arabidopsis plants constitutively expressing MIOX have elevated foliar AsA content and displayed enhanced growth rate, biomass accumulation, and increased tolerance to multiple abiotic stresses. In this work, we used a combination of transcriptomics, chromatography, microscopy, and physiological measurements to gain a deeper understanding of the underlying mechanisms mediating the phenotype of the AtMIOX4 line. Transcriptomic analysis revealed increased expression of genes involved in auxin synthesis, hydrolysis, transport, and metabolism, which are supported by elevated auxin levels both in vitro and in vivo, and confirmed by assays demonstrating their effect on epidermal cell elongation in the AtMIOX4 over-expressers. Additionally, we detected up-regulation of transcripts involved in photosynthesis and this was validated by increased efficiency of the photosystem II and proton motive force. We also found increased expression of amylase leading to higher intracellular glucose levels. Multiple gene families conferring plants tolerance/expressed in response to cold, water limitation, and heat stresses were found to be elevated in the AtMIOX4 line. Interestingly, the high AsA plants also displayed up-regulation of transcripts and hormones involved in defense including jasmonates, defensin, glucosinolates, and transcription factors that are known to be important for biotic stress tolerance. These results overall indicate that elevated levels of auxin and glucose, and enhanced photosynthetic efficiency in combination with up-regulation of abiotic stresses response genes underly the higher growth rate and abiotic stresses tolerance phenotype of the AtMIOX4 over-expressers.
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Affiliation(s)
- Nirman Nepal
- Arkansas Biosciences InstituteArkansas State UniversityState UniversityARUSA
| | | | - Karina Medina‐Jiménez
- Arkansas Biosciences InstituteArkansas State UniversityState UniversityARUSA
- INBIOTECAUniversidad VeracruzanaXalapaMéxico
| | | | | | | | - Argelia Lorence
- Arkansas Biosciences InstituteArkansas State UniversityState UniversityARUSA
- Department of Chemistry and PhysicsArkansas State UniversityState UniversityARUSA
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10
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Sousa RHV, Carvalho FEL, Lima-Melo Y, Alencar VTCB, Daloso DM, Margis-Pinheiro M, Komatsu S, Silveira JAG. Impairment of peroxisomal APX and CAT activities increases protection of photosynthesis under oxidative stress. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:627-639. [PMID: 30312463 PMCID: PMC6322566 DOI: 10.1093/jxb/ery354] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 10/03/2018] [Indexed: 05/21/2023]
Abstract
Retrograde signalling pathways that are triggered by changes in cellular redox homeostasis remain poorly understood. Transformed rice plants that are deficient in peroxisomal ascorbate peroxidase APX4 (OsAPX4-RNAi) are known to exhibit more effective protection of photosynthesis against oxidative stress than controls when catalase (CAT) is inhibited, but the mechanisms involved have not been characterized. An in-depth physiological and proteomics analysis was therefore performed on OsAPX4-RNAi CAT-inhibited rice plants. Loss of APX4 function led to an increased abundance of several proteins that are involved in essential metabolic pathways, possibly as a result of increased tissue H2O2 levels. Higher photosynthetic activities observed in the OsAPX4-RNAi plants under CAT inhibition were accompanied by higher levels of Rubisco, higher maximum rates of Rubisco carboxylation, and increased photochemical efficiencies, together with large increases in photosynthesis-related proteins. Large increases were also observed in the levels of proteins involved in the ascorbate/glutathione cycle and in other antioxidant-related pathways, and these changes may be important in the protection of photosynthesis in the OsAPX4-RNAi plants. Large increases in the abundance of proteins localized in the nuclei and mitochondria were also observed, together with increased levels of proteins involved in important cellular pathways, particularly protein translation. Taken together, the results show that OsAPX4-RNAi plants exhibit significant metabolic reprogramming, which incorporates a more effective antioxidant response to protect photosynthesis under conditions of impaired CAT activity.
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Affiliation(s)
- Rachel H V Sousa
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Fabricio E L Carvalho
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Yugo Lima-Melo
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza, Ceará, Brazil
- Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku, Finland
| | - Vicente T C B Alencar
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Danilo M Daloso
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza, Ceará, Brazil
| | - Marcia Margis-Pinheiro
- Department of Genetics, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Setsuko Komatsu
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan
| | - Joaquim A G Silveira
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza, Ceará, Brazil
- Correspondence:
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11
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Huma B, Kundu S, Poolman MG, Kruger NJ, Fell DA. Stoichiometric analysis of the energetics and metabolic impact of photorespiration in C3 plants. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2018; 96:1228-1241. [PMID: 30257035 DOI: 10.1111/tpj.14105] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 09/10/2018] [Accepted: 09/17/2018] [Indexed: 06/08/2023]
Abstract
Analysis of the impact of photorespiration on plant metabolism is usually based on manual inspection of small network diagrams. Here we create a structural metabolic model that contains the reactions that participate in photorespiration in the plastid, peroxisome, mitochondrion and cytosol, and the metabolite exchanges between them. This model was subjected to elementary flux modes analysis, a technique that enumerates all the component, minimal pathways of a network. Any feasible photorespiratory metabolism in the plant will be some combination of the elementary flux modes (EFMs) that contain the Rubisco oxygenase reaction. Amongst the EFMs we obtained was the classic photorespiratory cycle, but there were also modes that involve photorespiration coupled with mitochondrial metabolism and ATP production, the glutathione-ascorbate cycle and nitrate reduction to ammonia. The modes analysis demonstrated the underlying basis of the metabolic linkages with photorespiration that have been inferred experimentally. The set of reactions common to all the elementary modes showed good agreement with the gene products of mutants that have been reported to have a defective phenotype in photorespiratory conditions. Finally, the set of modes provided a formal demonstration that photorespiration itself does not impact on the CO2 :O2 ratio (assimilation quotient), except in those modes associated with concomitant nitrate reduction.
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Affiliation(s)
- Benazir Huma
- Department of Biophysics, Molecular Biology and Bioinformatics, University of Calcutta, 92 APC Road, Kolkata, 700 009, West Bengal, India
| | - Sudip Kundu
- Department of Biophysics, Molecular Biology and Bioinformatics, University of Calcutta, 92 APC Road, Kolkata, 700 009, West Bengal, India
| | - Mark G Poolman
- Department of Biological and Medical Sciences, Oxford Brookes University, Gipsy Lane, Headington, Oxford, OX3 OBP, UK
| | - Nicholas J Kruger
- Department of Plant Sciences, University of Oxford, South Parks Road, Oxford, OX1 3RB, UK
| | - David A Fell
- Department of Biological and Medical Sciences, Oxford Brookes University, Gipsy Lane, Headington, Oxford, OX3 OBP, UK
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12
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Cunha JR, Carvalho FEL, Lima-Neto MC, Jardim-Messeder D, Cerqueira JVA, Martins MO, Fontenele AV, Márgis-Pinheiro M, Komatsu S, Silveira JAG. Proteomic and physiological approaches reveal new insights for uncover the role of rice thylakoidal APX in response to drought stress. J Proteomics 2018; 192:125-136. [PMID: 30170113 DOI: 10.1016/j.jprot.2018.08.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 08/23/2018] [Accepted: 08/24/2018] [Indexed: 11/25/2022]
Abstract
Chloroplast APX isoforms display controversial roles as H2O2 scavengers and signaling players in response to abiotic stress and conclusive results are lacking. We tested the hypothesis that thylakoidal APX displays an important role for drought tolerance, especially by regulating abundance of essential protein species. For this, OsApx8 RNAi-silenced rice (apx8) and non-transformed plants (NT) were exposed to mild water deficit. The drought-sensitivity in apx8 plants was revealed by decreases in shoot growth, relative water content and photosynthesis, which was accompanied by increased membrane damage, all compared to NT plants. This higher sensitivity of apx8 plants to mild drought stress was also related to a lower accumulation of important protein species involved in several metabolic processes, especially photosynthesis, photorespiration and redox metabolism. Despite apx8 plants have displayed an effective induction of compensatory antioxidant mechanisms in well-watered conditions, it was not enough to maintain H2O2 homeostasis and avoid oxidative and physiological disturbances under mild drought conditions. Thus, thylakoidal APX is involved in several phenotypic modifications at proteomic profile level, possibly via a H2O2-induced signaling mechanism. Consequently, this APX isoform is crucial for rice plants effectively cope with a mild drought condition. BIOLOGICAL SIGNIFICANCE: This work provides for the first time an integrative study involving proteomic, physiological and biochemical analyses directed to elucidation of thylakoidal APX roles for drought tolerance in rice plants. Our data reveal that this enzyme is crucial for maintaining of growth and photosynthesis under mild water deficit conditions. This essential role is related to maintaining of H2O2 homeostasis and accumulation of essential proteins involved in several important metabolic pathways. Remarkably, for drought resistance was essential the accumulation of proteins involved with metabolism of photosynthesis, signaling, carbohydrates, protein synthesis/degradation and stress. These results can contribute to understand the role of chloroplast ascorbate peroxidases in drought tolerance, highlighting the physiological importance of key proteins in this process.
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Affiliation(s)
- Juliana R Cunha
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza CEP 60451-970, Brazil
| | - Fabrício E L Carvalho
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza CEP 60451-970, Brazil
| | - Milton C Lima-Neto
- Campus do Litoral Paulista, Universidade Estadual Paulista (UNESP-CLP), São Vicente CEP 11380-972, Brazil
| | - Douglas Jardim-Messeder
- Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre CEP 91501-970, Brazil
| | - João Victor A Cerqueira
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza CEP 60451-970, Brazil
| | - Marcio O Martins
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza CEP 60451-970, Brazil
| | - Adilton V Fontenele
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza CEP 60451-970, Brazil
| | - Márcia Márgis-Pinheiro
- Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre CEP 91501-970, Brazil
| | - Setsuko Komatsu
- Faculty of Environmental and Information Sciences, Fukui University of Technology, Fukui 910-8505, Japan
| | - Joaquim A G Silveira
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Fortaleza CEP 60451-970, Brazil.
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13
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Accelerated inflammation and oxidative stress induced by LPS in acute lung injury: Ιnhibition by ST1926. Int J Mol Med 2018; 41:3405-3421. [PMID: 29568857 PMCID: PMC5881729 DOI: 10.3892/ijmm.2018.3574] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Accepted: 02/20/2018] [Indexed: 01/01/2023] Open
Abstract
Bioavailable and less toxic synthetic retinoids, such as the atypical adamantyl retinoid ST1926, have been well developed and investigated in clinical trials for many diseases. The aim of our study was to explore the role of ST1926 in lipopolysaccharide (LPS)-induced acute lung injury (ALI) and to reveal the possible molecular mechanism. Mice were treated with LPS to induce acute lung injury followed by ST1926 administration. After LPS induction, mice administered with ST1926 showed lower inflammation infiltration in bronchoalveolar lavage (BAL) fluid, and pro-inflammatory cytokines, including interleukin-1β (IL-1β), IL-18, IL-6 and tumor necrosis factor-α (TNF-α) in serum and lung tissue samples obtained from mice. In addition, western blot assays suggested that ST1926 suppressed nuclear factor-κB (NF-κB), inhibitor-κB kinase-α (IκBα) and IκB kinase (IKKα), as well as Toll-like receptor 4 (TLR4) induced by LPS. In addition, reactive oxygen species (ROS) stimulated by LPS was also suppressed for ST1926 through inhibiting p38 and extracellular receptor kinase (ERK) signaling pathway. Taken together, the data here indicated that ST1926 may be of potential value in treating acute lung injury through inflammation and ROS suppression via inactivating TLR4/NF-κB and p38/ERK1/2 signaling pathways.
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14
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Hu S, Yu Y, Chen Q, Mu G, Shen Z, Zheng L. OsMYB45 plays an important role in rice resistance to cadmium stress. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2017; 264:1-8. [PMID: 28969789 DOI: 10.1016/j.plantsci.2017.08.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 07/24/2017] [Accepted: 08/06/2017] [Indexed: 05/04/2023]
Abstract
Cadmium (Cd) is one of the most toxic heavy metal elements in nature, and it causes serious damage to plant cells. Here, we report that a transcription factor OsMYB45 is involved in Cd stress response in rice. OsMYB45 is highly expressed in rice leaves, husks, stamens, pistils, and lateral roots, and its expression is induced by Cd stress. OsMYB45 fused to green fluorescent protein localized to the cell nucleus in onion epidermal cells. Mutation of OsMYB45 resulted in hypersensitivity to Cd treatment, and the concentration of H2O2 in the leaves of mutant nearly doubled, while catalase (CAT) activity was halved compared with the wild-type. Moreover, gene expression analysis indicated that OsCATA and OsCATC expression is significantly lower in the mutant than in the wild-type. In addition, overexpression of OsMYB45 in the mutant complemented the mutant phenotype. Taken together, OsMYB45 plays an important role in tolerance to Cd stress in rice.
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Affiliation(s)
- Shubao Hu
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Yao Yu
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Qiuhong Chen
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Guangmao Mu
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhenguo Shen
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Luqing Zheng
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China.
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15
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Ribeiro CW, Korbes AP, Garighan JA, Jardim-Messeder D, Carvalho FEL, Sousa RHV, Caverzan A, Teixeira FK, Silveira JAG, Margis-Pinheiro M. Rice peroxisomal ascorbate peroxidase knockdown affects ROS signaling and triggers early leaf senescence. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2017; 263:55-65. [PMID: 28818384 DOI: 10.1016/j.plantsci.2017.07.009] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 07/10/2017] [Accepted: 07/10/2017] [Indexed: 06/07/2023]
Abstract
H2O2, which is continually produced by aerobic metabolism, is a cytotoxic molecule when in high levels. However, low levels can act as a signaling molecule able to regulate the expression of stress responses, senescence, programmed cell death, plant growth, and development. Ascorbate peroxidase (APX) enzyme plays an essential role in the control of intracellular H2O2 levels. Here, the function of a gene encoding a peroxisomal APX (OsAPX4) from rice (Oryza sativa L.) was studied. OsAPX4 gene expression can be detected in roots and panicles, but the highest expression level occurs in leaves. Silencing of OsAPX4 and OsAPX3 expression in RNAiOsAPX4 did not affect the growth of plants under growth chamber conditions, but aging transgenic plants interestingly displayed an early senescence phenotype. Leaf fragments from silenced plants were also more sensitive to induced senescence conditions. RNAiOsAPX4 plants did not present detectable changes in intracellular H2O2 levels, but biochemical analyses showed that transgenic plants displayed some decreased APX activity in the chloroplastic fraction. Also, the peroxisomal enzyme glycolate oxidase exhibited lower activity, whereas catalase activity was similar to non-transformed rice. The results imply that OsAPX4 gene has an important role in leaf senescence pathway mediated by ROS signaling.
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Affiliation(s)
- Carolina W Ribeiro
- Programa de Pós-Graduação em Biologia Celular e Molecular, Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil; Departamento de Genética, Universidade Federal do Rio Grande do Sul, 91501-970, Porto Alegre, RS, Brazil.
| | - Ana Paula Korbes
- Departamento de Genética, Universidade Federal do Rio Grande do Sul, 91501-970, Porto Alegre, RS, Brazil.
| | - Julio A Garighan
- Departamento de Genética, Universidade Federal do Rio Grande do Sul, 91501-970, Porto Alegre, RS, Brazil.
| | - Douglas Jardim-Messeder
- Departamento de Genética, Universidade Federal do Rio Grande do Sul, 91501-970, Porto Alegre, RS, Brazil.
| | - Fabricio E L Carvalho
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, 60455-970, Fortaleza, CE, Brazil.
| | - Rachel H V Sousa
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, 60455-970, Fortaleza, CE, Brazil.
| | - Andreia Caverzan
- Departamento de Genética, Universidade Federal do Rio Grande do Sul, 91501-970, Porto Alegre, RS, Brazil; Faculdade de Agronomia e Medicina Veterinária, Programa de Pós-Graduação em Agronomia, Universidade de Passo Fundo, Passo Fundo, RS, Brazil.
| | - Felipe K Teixeira
- Departamento de Genética, Universidade Federal do Rio Grande do Sul, 91501-970, Porto Alegre, RS, Brazil.
| | - Joaquim A G Silveira
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, 60455-970, Fortaleza, CE, Brazil.
| | - Marcia Margis-Pinheiro
- Programa de Pós-Graduação em Biologia Celular e Molecular, Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil; Departamento de Genética, Universidade Federal do Rio Grande do Sul, 91501-970, Porto Alegre, RS, Brazil.
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16
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Bonifacio A, Carvalho FEL, Martins MO, Lima Neto MC, Cunha JR, Ribeiro CW, Margis-Pinheiro M, Silveira JAG. Silenced rice in both cytosolic ascorbate peroxidases displays pre-acclimation to cope with oxidative stress induced by 3-aminotriazole-inhibited catalase. JOURNAL OF PLANT PHYSIOLOGY 2016; 201:17-27. [PMID: 27379617 DOI: 10.1016/j.jplph.2016.06.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 06/23/2016] [Accepted: 06/24/2016] [Indexed: 05/24/2023]
Abstract
The maintenance of H2O2 homeostasis and signaling mechanisms in plant subcellular compartments is greatly dependent on cytosolic ascorbate peroxidases (APX1 and APX2) and peroxisomal catalase (CAT) activities. APX1/2 knockdown plants were utilized in this study to clarify the role of increased cytosolic H2O2 levels as a signal to trigger the antioxidant defense system against oxidative stress generated in peroxisomes after 3-aminotriazole-inhibited catalase (CAT). Before supplying 3-AT, silenced APX1/2 plants showed marked changes in their oxidative and antioxidant profiles in comparison to NT plants. After supplying 3-AT, APX1/2 plants triggered up-expression of genes belonging to APX (OsAPX7 and OsAPX8) and GPX families (OsGPX1, OsGPX2, OsGPX3 and OsGPX5), but to a lower extent than in NT plants. In addition, APX1/2 exhibited lower glycolate oxidase (GO) activity, higher CO2 assimilation, higher cellular integrity and higher oxidation of GSH, whereas the H2O2 and lipid peroxidation levels remained unchanged. This evidence indicates that redox pre-acclimation displayed by silenced rice contributed to coping with oxidative stress generated by 3-AT. We suggest that APX1/2 plants were able to trigger alternative oxidative and antioxidant mechanisms involving signaling by H2O2, allowing these plants to display effective physiological responses for protection against oxidative damage generated by 3-AT, compared to non-transformed plants.
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Affiliation(s)
- Aurenivia Bonifacio
- Department of Biochemistry and Molecular Biology, Federal University of Ceara, Fortaleza/CE, 60451-970, Brazil
| | - Fabrício E L Carvalho
- Department of Biochemistry and Molecular Biology, Federal University of Ceara, Fortaleza/CE, 60451-970, Brazil
| | - Marcio O Martins
- Department of Biochemistry and Molecular Biology, Federal University of Ceara, Fortaleza/CE, 60451-970, Brazil
| | - Milton C Lima Neto
- Biosciences Institute, São Paulo State University, UNESP, Coastal Campus, São Vicente/SP, P.O. Box 73601, 11380-972, Brazil
| | - Juliana R Cunha
- Department of Biochemistry and Molecular Biology, Federal University of Ceara, Fortaleza/CE, 60451-970, Brazil
| | - Carolina W Ribeiro
- Department of Genetics, Federal University of Rio Grande do Sul, Porto Alegre/RS, 91501-970, Brazil
| | - Marcia Margis-Pinheiro
- Department of Genetics, Federal University of Rio Grande do Sul, Porto Alegre/RS, 91501-970, Brazil
| | - Joaquim A G Silveira
- Department of Biochemistry and Molecular Biology, Federal University of Ceara, Fortaleza/CE, 60451-970, Brazil.
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17
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Wei T, Deng K, Liu D, Gao Y, Liu Y, Yang M, Zhang L, Zheng X, Wang C, Song W, Chen C, Zhang Y. Ectopic Expression of DREB Transcription Factor, AtDREB1A, Confers Tolerance to Drought in Transgenic Salvia miltiorrhiza. PLANT & CELL PHYSIOLOGY 2016; 57:1593-609. [PMID: 27485523 DOI: 10.1093/pcp/pcw084] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 04/17/2016] [Indexed: 05/20/2023]
Abstract
Drought decreases crop productivity more than any other type of environmental stress. Transcription factors (TFs) play crucial roles in regulating plant abiotic stress responses. The Arabidopsis thaliana gene DREB1A/CBF3, encoding a stress-inducible TF, was introduced into Salvia miltiorrhiza Ectopic expression of AtDREB1A resulted in increased drought tolerance, and transgenic lines had higher relative water content and Chl content, and exhibited an increased photosynthetic rate when subjected to drought stress. AtDREB1A transgenic plants generally displayed lower malondialdehyde (MDA), but higher superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD) activities under drought stress. In particular, plants with ectopic AtDREB1A expression under the control of the stress-induced RD29A promoter exhibited more tolerance to drought compared with p35S::AtDREB1A transgenic plants, without growth inhibition or phenotypic aberrations. Differential gene expression profiling of wild-type and pRD29A::AtDREB1A transgenic plants following drought stress revealed that the expression levels of various genes associated with the stress response, photosynthesis, signaling, carbohydrate metabolism and protein protection were substantially higher in transgenic plants. In addition, the amount of salvianolic acids and tanshinones was significantly elevated in AtDREB1A transgenic S. miltiorrhiza roots, and most of the genes in the related biosynthetic pathways were up-regulated. Together, these results demonstrated that inducing the expression of a TF can effectively regulate multiple genes in the stress response pathways and significantly improve the resistance of plants to abiotic stresses. Our results also suggest that genetic manipulation of a TF can improve production of valuable secondary metabolites by regulating genes in associated pathways.
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Affiliation(s)
- Tao Wei
- College of Life Sciences, Nankai University, Tianjin 300071, PR China School of Life Sciences and Technology, University of Electronic Science and Technology of China, Chengdu, 610054, PR China
| | - Kejun Deng
- School of Life Sciences and Technology, University of Electronic Science and Technology of China, Chengdu, 610054, PR China
| | - Dongqing Liu
- School of Life Sciences and Technology, University of Electronic Science and Technology of China, Chengdu, 610054, PR China
| | - Yonghong Gao
- College of Life Sciences, Nankai University, Tianjin 300071, PR China
| | - Yu Liu
- School of Life Sciences and Technology, University of Electronic Science and Technology of China, Chengdu, 610054, PR China
| | - Meiling Yang
- College of Life Sciences, Nankai University, Tianjin 300071, PR China
| | - Lipeng Zhang
- College of Life Sciences, Nankai University, Tianjin 300071, PR China
| | - Xuelian Zheng
- School of Life Sciences and Technology, University of Electronic Science and Technology of China, Chengdu, 610054, PR China
| | - Chunguo Wang
- College of Life Sciences, Nankai University, Tianjin 300071, PR China
| | - Wenqin Song
- College of Life Sciences, Nankai University, Tianjin 300071, PR China
| | - Chengbin Chen
- College of Life Sciences, Nankai University, Tianjin 300071, PR China
| | - Yong Zhang
- School of Life Sciences and Technology, University of Electronic Science and Technology of China, Chengdu, 610054, PR China
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18
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Lima-Melo Y, Carvalho FEL, Martins MO, Passaia G, Sousa RHV, Neto MCL, Margis-Pinheiro M, Silveira JAG. Mitochondrial GPX1 silencing triggers differential photosynthesis impairment in response to salinity in rice plants. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2016; 58:737-48. [PMID: 26799169 DOI: 10.1111/jipb.12464] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 01/19/2016] [Indexed: 05/08/2023]
Abstract
The physiological role of plant mitochondrial glutathione peroxidases is scarcely known. This study attempted to elucidate the role of a rice mitochondrial isoform (GPX1) in photosynthesis under normal growth and salinity conditions. GPX1 knockdown rice lines (GPX1s) were tested in absence and presence of 100 mM NaCl for 6 d. Growth reduction of GPX1s line under non-stressful conditions, compared with non-transformed (NT) plants occurred in parallel to increased H2 O2 and decreased GSH contents. These changes occurred concurrently with photosynthesis impairment, particularly in Calvin cycle's reactions, since photochemical efficiency did not change. Thus, GPX1 silencing and downstream molecular/metabolic changes modulated photosynthesis differentially. In contrast, salinity induced reduction in both phases of photosynthesis, which were more impaired in silenced plants. These changes were associated with root morphology alterations but not shoot growth. Both studied lines displayed increased GPX activity but H2 O2 content did not change in response to salinity. Transformed plants exhibited lower photorespiration, water use efficiency and root growth, indicating that GPX1 could be important to salt tolerance. Growth reduction of GPX1s line might be related to photosynthesis impairment, which in turn could have involved a cross talk mechanism between mitochondria and chloroplast originated from redox changes due to GPX1 deficiency.
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Affiliation(s)
- Yugo Lima-Melo
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, CEP 60451-970, Fortaleza, Ceará, Brazil
| | - Fabricio E L Carvalho
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, CEP 60451-970, Fortaleza, Ceará, Brazil
| | - Márcio O Martins
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, CEP 60451-970, Fortaleza, Ceará, Brazil
| | - Gisele Passaia
- Department of Genetics, Federal University of Rio Grande do Sul, CEP 91501-970, Porto Alegre, Rio Grande do Sul, Brazil
| | - Rachel H V Sousa
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, CEP 60451-970, Fortaleza, Ceará, Brazil
| | - Milton C Lima Neto
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, CEP 60451-970, Fortaleza, Ceará, Brazil
| | - Márcia Margis-Pinheiro
- Department of Genetics, Federal University of Rio Grande do Sul, CEP 91501-970, Porto Alegre, Rio Grande do Sul, Brazil
| | - Joaquim A G Silveira
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, CEP 60451-970, Fortaleza, Ceará, Brazil
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19
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Wei T, Deng K, Gao Y, Liu Y, Yang M, Zhang L, Zheng X, Wang C, Song W, Chen C, Zhang Y. Arabidopsis DREB1B in transgenic Salvia miltiorrhiza increased tolerance to drought stress without stunting growth. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2016; 104:17-28. [PMID: 27002402 DOI: 10.1016/j.plaphy.2016.03.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Revised: 02/28/2016] [Accepted: 03/03/2016] [Indexed: 05/20/2023]
Abstract
Multiple stress response genes are controlled by transcription factors in a coordinated manner; therefore, these factors can be used for molecular plant breeding. CBF1/DREB1B, a known stress-inducible gene, was isolated from Arabidopsis thaliana and introduced into Salvia miltiorrhiza under the control of the CaMV35S or RD29A promoter. Under drought stress, relative water content, chlorophyll content, and the net photosynthetic rate were observed to be higher in the transgenic lines than in the wild type (WT). Moreover, O2(-) and H2O2 accumulation was observed to be lower in the transgenic lines. Additional analyses revealed that the AtDREB1B transgenic plants generally displayed lesser malondialdehyde (MDA) but higher superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD) activities than the WT under drought stress. Quantitative real-time polymerase chain reaction of a subset of genes involved in photosynthesis, stress response, carbohydrate metabolism, and cell protection further verified that AtDREB1B could enhance tolerance to drought by activating different downstream DREB/CBF genes in the transgenic plants. Furthermore, no growth inhibition was detected in transgenic S. miltiorrhiza plants that expressed AtDREB1B driven by either the constitutive CaMV35S promoter or the stress-inducible RD29A promoter. Together, these results suggest that AtDREB1B is a good candidate gene for increasing drought tolerance in transgenic S. miltiorrhiza.
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Affiliation(s)
- Tao Wei
- College of Life Sciences, Nankai University, Tianjin, 300071, PR China; School of Life Sciences and Technology, University of Electronic Science and Technology of China, Chengdu, 610054, PR China
| | - Kejun Deng
- School of Life Sciences and Technology, University of Electronic Science and Technology of China, Chengdu, 610054, PR China
| | - Yonghong Gao
- College of Life Sciences, Nankai University, Tianjin, 300071, PR China
| | - Yu Liu
- School of Life Sciences and Technology, University of Electronic Science and Technology of China, Chengdu, 610054, PR China
| | - Meiling Yang
- College of Life Sciences, Nankai University, Tianjin, 300071, PR China
| | - Lipeng Zhang
- College of Life Sciences, Nankai University, Tianjin, 300071, PR China
| | - Xuelian Zheng
- School of Life Sciences and Technology, University of Electronic Science and Technology of China, Chengdu, 610054, PR China
| | - Chunguo Wang
- College of Life Sciences, Nankai University, Tianjin, 300071, PR China
| | - Wenqin Song
- College of Life Sciences, Nankai University, Tianjin, 300071, PR China
| | - Chengbin Chen
- College of Life Sciences, Nankai University, Tianjin, 300071, PR China.
| | - Yong Zhang
- School of Life Sciences and Technology, University of Electronic Science and Technology of China, Chengdu, 610054, PR China.
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20
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Sun D, Hussain HI, Yi Z, Rookes JE, Kong L, Cahill DM. Mesoporous silica nanoparticles enhance seedling growth and photosynthesis in wheat and lupin. CHEMOSPHERE 2016; 152:81-91. [PMID: 26963239 DOI: 10.1016/j.chemosphere.2016.02.096] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 02/18/2016] [Accepted: 02/22/2016] [Indexed: 05/22/2023]
Abstract
The application of mesoporous silica nanoparticles (MSNs) as a smart delivery system to agricultural crops is gaining attention but the release of nanoparticles into the environment may pose a potential threat to biological systems. We investigated the effects of MSNs on the growth and development of wheat and lupin plants grown under controlled conditions. We report a dramatic increase in the growth of wheat and lupin plants exposed to MSNs. We also found that, in leaves, MSNs localised to chloroplasts and that photosynthetic activity was significantly increased. In addition, absorption and cellular distribution of MSNs by the two plant species following root uptake were observed using scanning electron microscopy equipped with energy dispersive spectroscopy (SEM-EDS). Following uptake of MSNs at 500 and 1000 mg L(-1), there was enhancement of seed germination, increased plant biomass, total protein and chlorophyll content. Treatment of both species with MSNs at the highest concentration (2000 mg L(-1)) did not result in oxidative stress or cell membrane damage. These findings show that MSNs can be used as novel delivery systems in plants and that over the range of concentrations tested, MSNs do not have any negative impacts on plant growth or development.
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Affiliation(s)
- Dequan Sun
- Deakin University, School of Life and Environmental Sciences, Geelong Campus at Waurn Ponds, Victoria 3217, Australia; Key Laboratory for Tropical Fruit Biology of Ministry of Agriculture, South Subtropical Crop Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang 524091, China
| | - Hashmath I Hussain
- Deakin University, School of Life and Environmental Sciences, Geelong Campus at Waurn Ponds, Victoria 3217, Australia
| | - Zhifeng Yi
- Institute for Frontier Materials (IFM), Geelong Technology Precinct, Deakin University, Geelong Campus at Waurn Ponds, Victoria 3216, Australia
| | - James E Rookes
- Deakin University, School of Life and Environmental Sciences, Geelong Campus at Waurn Ponds, Victoria 3217, Australia
| | - Lingxue Kong
- Institute for Frontier Materials (IFM), Geelong Technology Precinct, Deakin University, Geelong Campus at Waurn Ponds, Victoria 3216, Australia
| | - David M Cahill
- Deakin University, School of Life and Environmental Sciences, Geelong Campus at Waurn Ponds, Victoria 3217, Australia.
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21
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Cui P, Liu H, Islam F, Li L, Farooq MA, Ruan S, Zhou W. OsPEX11, a Peroxisomal Biogenesis Factor 11, Contributes to Salt Stress Tolerance in Oryza sativa. FRONTIERS IN PLANT SCIENCE 2016; 7:1357. [PMID: 27695459 PMCID: PMC5024708 DOI: 10.3389/fpls.2016.01357] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 08/25/2016] [Indexed: 05/19/2023]
Abstract
Peroxisomes are single membrane-bound organelles, whose basic enzymatic constituents are catalase and H2O2-producing flavin oxidases. Previous reports showed that peroxisome is involved in numerous processes including primary and secondary metabolism, plant development and abiotic stress responses. However, knowledge on the function of different peroxisome genes from rice and its regulatory roles in salt and other abiotic stresses is limited. Here, a novel prey protein, OsPEX11 (Os03g0302000), was screened and identified by yeast two-hybrid and GST pull-down assays. Phenotypic analysis of OsPEX11 overexpression seedlings demonstrated that they had better tolerance to salt stress than wild type (WT) and OsPEX11-RNAi seedlings. Compared with WT and OsPEX11-RNAi seedlings, overexpression of OsPEX11 had lower level of lipid peroxidation, Na+/K+ ratio, higher activities of antioxidant enzymes (SOD, POD, and CAT) and proline accumulation. Furthermore, qPCR data suggested that OsPEX11 acted as a positive regulator of salt tolerance by reinforcing the expression of several well-known rice transporters (OsHKT2;1, OsHKT1;5, OsLti6a, OsLti6b, OsSOS1, OsNHX1, and OsAKT1) involved in Na+/K+ homeostasis in transgenic plants under salinity. Ultrastructural observations of OsPEX11-RNAi seedlings showed that they were less sensitive to salt stress than WT and overexpression lines. These results provide experimental evidence that OsPEX11 is an important gene implicated in Na+ and K+ regulation, and plays a critical role in salt stress tolerance by modulating the expression of cation transporters and antioxidant defense. Thus, OsPEX11 could be considered in transgenic breeding for improvement of salt stress tolerance in rice crop.
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Affiliation(s)
- Peng Cui
- Institute of Crop Science and Zhejiang Key Laboratory of Crop Germplasm, Zhejiang UniversityHangzhou, China
| | - Hongbo Liu
- College of Agriculture and Food Science, Zhejiang A & F UniversityLin’an, China
| | - Faisal Islam
- Institute of Crop Science and Zhejiang Key Laboratory of Crop Germplasm, Zhejiang UniversityHangzhou, China
| | - Lan Li
- Institute of Crop Science and Zhejiang Key Laboratory of Crop Germplasm, Zhejiang UniversityHangzhou, China
| | - Muhammad A. Farooq
- Institute of Crop Science and Zhejiang Key Laboratory of Crop Germplasm, Zhejiang UniversityHangzhou, China
| | - Songlin Ruan
- Laboratory of Plant Molecular Biology and Proteomics, Institute of Biotechnology, Hangzhou Academy of Agricultural SciencesHangzhou, China
- *Correspondence: Weijun Zhou, Songlin Ruan,
| | - Weijun Zhou
- Institute of Crop Science and Zhejiang Key Laboratory of Crop Germplasm, Zhejiang UniversityHangzhou, China
- *Correspondence: Weijun Zhou, Songlin Ruan,
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22
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Yang Y, Han X, Liang Y, Ghosh A, Chen J, Tang M. The Combined Effects of Arbuscular Mycorrhizal Fungi (AMF) and Lead (Pb) Stress on Pb Accumulation, Plant Growth Parameters, Photosynthesis, and Antioxidant Enzymes in Robinia pseudoacacia L. PLoS One 2015; 10:e0145726. [PMID: 26698576 PMCID: PMC4689355 DOI: 10.1371/journal.pone.0145726] [Citation(s) in RCA: 113] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Accepted: 12/08/2015] [Indexed: 12/02/2022] Open
Abstract
Arbuscular mycorrhizal fungi (AMF) are considered as a potential biotechnological tool for improving phytostabilization efficiency and plant tolerance to heavy metal-contaminated soils. However, the mechanisms through which AMF help to alleviate metal toxicity in plants are still poorly understood. A greenhouse experiment was conducted to evaluate the effects of two AMF species (Funneliformis mosseae and Rhizophagus intraradices) on the growth, Pb accumulation, photosynthesis and antioxidant enzyme activities of a leguminous tree (Robinia pseudoacacia L.) at Pb addition levels of 0, 500, 1000 and 2000 mg kg-1 soil. AMF symbiosis decreased Pb concentrations in the leaves and promoted the accumulation of biomass as well as photosynthetic pigment contents. Mycorrhizal plants had higher gas exchange capacity, non-photochemistry efficiency, and photochemistry efficiency compared with non-mycorrhizal plants. The enzymatic activities of superoxide dismutase (SOD), ascorbate peroxidases (APX) and glutathione peroxidase (GPX) were enhanced, and hydrogen peroxide (H2O2) and malondialdehyde (MDA) contents were reduced in mycorrhizal plants. These findings suggested that AMF symbiosis could protect plants by alleviating cellular oxidative damage in response to Pb stress. Furthermore, mycorrhizal dependency on plants increased with increasing Pb stress levels, indicating that AMF inoculation likely played a more important role in plant Pb tolerance in heavily contaminated soils. Overall, both F. mosseae and R. intraradices were able to maintain efficient symbiosis with R. pseudoacacia in Pb polluted soils. AMF symbiosis can improve photosynthesis and reactive oxygen species (ROS) scavenging capabilities and decrease Pb concentrations in leaves to alleviate Pb toxicity in R. pseudoacacia. Our results suggest that the application of the two AMF species associated with R. pseudoacacia could be a promising strategy for enhancing the phytostabilization efficiency of Pb contaminated soils.
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Affiliation(s)
- Yurong Yang
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi 712100, China
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xiaozhen Han
- Plant Systems Biology Lab, Botany and Plant Science, School of Natural Sciences, National University of Ireland, Galway, Ireland
| | - Yan Liang
- Joint BioEnergy Institute, 5885 Hollis St, Emeryville, California 94608, United States of America
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States of America
| | - Amit Ghosh
- School of Energy Science and Engineering, PK Sinha Centre for Bioenergy, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Jie Chen
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Ming Tang
- College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, China
- * E-mail:
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23
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Corpas FJ. What is the role of hydrogen peroxide in plant peroxisomes? PLANT BIOLOGY (STUTTGART, GERMANY) 2015; 17:1099-103. [PMID: 26242708 DOI: 10.1111/plb.12376] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 07/27/2015] [Indexed: 05/21/2023]
Abstract
Plant peroxisomes are unusual subcellular compartments with an apparent simple morphology but with complex metabolic activity. The presence of signal molecules, such as hydrogen peroxide (H(2)O(2)) and nitric oxide inside plant peroxisomes have added new functions in the cross-talk events among organelles and cells under physiological and stress conditions. Moreover, recent advances in proteomic analyses of plant peroxisomes have identified new protein candidates involved in several novel metabolic pathways. With all these new data, the present concise manuscript will focus on the relevance of the peroxisomal H(2)O(2) and its two main antioxidant enzymes, catalase and membrane-bound ascorbate peroxidase, which regulate its level and consequently its potential functions.
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Affiliation(s)
- Francisco J Corpas
- Group of Antioxidants, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Biochemistry, Cell and Molecular Biology of Plants, Consejo Superior de Investigaciones Científicas (CSIC), Granada, Spain
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24
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Moustaka J, Tanou G, Adamakis ID, Eleftheriou EP, Moustakas M. Leaf Age-Dependent Photoprotective and Antioxidative Response Mechanisms to Paraquat-Induced Oxidative Stress in Arabidopsis thaliana. Int J Mol Sci 2015; 16:13989-4006. [PMID: 26096005 PMCID: PMC4490535 DOI: 10.3390/ijms160613989] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 05/25/2015] [Accepted: 06/12/2015] [Indexed: 11/16/2022] Open
Abstract
Exposure of Arabidopsis thaliana young and mature leaves to the herbicide paraquat (Pq) resulted in a localized increase of hydrogen peroxide (H2O2) in the leaf veins and the neighboring mesophyll cells, but this increase was not similar in the two leaf types. Increased H2O2 production was concomitant with closed reaction centers (qP). Thirty min after Pq exposure despite the induction of the photoprotective mechanism of non-photochemical quenching (NPQ) in mature leaves, H2O2 production was lower in young leaves mainly due to the higher increase activity of ascorbate peroxidase (APX). Later, 60 min after Pq exposure, the total antioxidant capacity of young leaves was not sufficient to scavenge the excess reactive oxygen species (ROS) that were formed, and thus, a higher H2O2 accumulation in young leaves occurred. The energy allocation of absorbed light in photosystem II (PSII) suggests the existence of a differential photoprotective regulatory mechanism in the two leaf types to the time-course Pq exposure accompanied by differential antioxidant protection mechanisms. It is concluded that tolerance to Pq-induced oxidative stress is related to the redox state of quinone A (QA).
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Affiliation(s)
- Julietta Moustaka
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece.
| | - Georgia Tanou
- Faculty of Agriculture, Forestry and Natural Environment, School of Agriculture, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
| | - Ioannis-Dimosthenis Adamakis
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece.
| | - Eleftherios P Eleftheriou
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece.
| | - Michael Moustakas
- Department of Botany, School of Biology, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Greece.
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