title: A novel rice C2H2-type zinc finger protein, ZFP36, is a key player involved in abscisic acid-induced antioxidant defence and oxidative stress tolerance in rice.
abstract: C2H2-type zinc finger proteins (ZFPs) have been shown to play important roles in the responses of plants to oxidative and abiotic stresses, and different members of this family might have different roles during stresses. Here a novel abscisic acid (ABA)- and hydrogen peroxide (H₂O₂)-responsive C2H2-type ZFP gene, ZFP36, is identified in rice. The analyses of ZFP36-overexpressing and silenced transgenic rice plants showed that ZFP36 is involved in ABA-induced up-regulation of the expression and the activities of superoxide dismutase (SOD) and ascorbate peroxidase (APX). Overexpression of ZFP36 in rice plants was found to elevate the activities of antioxidant enzymes and to enhance the tolerance of rice plants to water stress and oxidative stress. In contrast, an RNA interference (RNAi) mutant of ZFP36 had lower activities of antioxidant enzymes and was more sensitive to water stress and oxidative stress. ABA-induced H₂O₂ production and ABA-activated mitogen-activated protein kinases (MAPKs) were shown to regulate the expression of ZFP36 in ABA signalling. On the other hand, ZFP36 also regulated the expression of NADPH oxidase genes, the production of H₂O₂, and the expression of OsMPK genes in ABA signalling. These results indicate that ZFP36 is required for ABA-induced antioxidant defence, for the tolerance of rice plants to water stress and oxidative stress, and for the regulation of the cross-talk between NADPH oxidase, H₂O₂, and MAPK in ABA signalling.
authors: College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, People's Republic of China National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, People's Republic of China.
authors: Hong
authors: H
authors: Zhang
authors: College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, People's Republic of China National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, People's Republic of China.
authors: Yanpei
authors: Y
authors: Liu
authors: College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, People's Republic of China National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, People's Republic of China.
authors: Feng
authors: F
authors: Wen
authors: College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, People's Republic of China National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, People's Republic of China.
authors: Dongmei
authors: D
authors: Yao
authors: College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, People's Republic of China National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, People's Republic of China.
authors: Lu
authors: L
authors: Wang
authors: College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, People's Republic of China National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, People's Republic of China.
authors: Jin
authors: J
authors: Guo
authors: College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, People's Republic of China National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, People's Republic of China.
authors: Lan
authors: L
authors: Ni
authors: College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, People's Republic of China National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, People's Republic of China.
authors: Aying
authors: A
authors: Zhang
authors: College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, People's Republic of China National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, People's Republic of China.
authors: Mingpu
authors: M
authors: Tan
authors: College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, People's Republic of China National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, People's Republic of China :myjiang@njau.edu.cn.
authors: Mingyi
authors: M
authors: Jiang
mesh_terms: D000040:Abscisic Acid / Q000378:metabolism*; D000975:Antioxidants / Q000378:metabolism; D060387:Ascorbate Peroxidases / Q000378:metabolism; D018506:Gene Expression Regulation, Plant; D006861:Hydrogen Peroxide / Q000378:metabolism; D020928:Mitogen-Activated Protein Kinases / Q000235:genetics / Q000378:metabolism; D012275:Oryza / Q000201:enzymology / Q000235:genetics* / Q000502:physiology; D018384:Oxidative Stress; D018515:Plant Leaves / Q000201:enzymology / Q000235:genetics / Q000502:physiology; D010940:Plant Proteins / Q000235:genetics* / Q000378:metabolism; D030821:Plants, Genetically Modified; D015398:Signal Transduction; D013312:Stress, Physiological; D013482:Superoxide Dismutase / Q000378:metabolism; D015854:Up-Regulation; D016335:Zinc Fingers
chemical_list: D000975:Antioxidants; D010940:Plant Proteins; D000040:Abscisic Acid; D006861:Hydrogen Peroxide; D060387:Ascorbate Peroxidases; D013482:Superoxide Dismutase; D020928:Mitogen-Activated Protein Kinases
keywords: Abscisic acid (ABA); C2H2-type zinc finger protein; antioxidant defence; oxidative stress; rice; water stress.