Melatonin delays leaf senescence and enhances salt stress tolerance in rice

Journal of Pineal Research - Tập 59 Số 1 - Trang 91-101 - 2015
Chengzhen Liang1, Guangyong Zheng2, Wenzhen Li1, Yiqin Wang1, Bin Hu1, Hongru Wang1, Hongkai Wu3, Yangwen Qian4, Xin‐Guang Zhu2, Dun‐Xian Tan5, Shou‐Yi Chen1, Chengcai Chu1
1State Key Laboratory of Plant Genomics and National Center for Plant Gene Research (Beijing); Institute of Genetics and Developmental Biology (IGDB); Chinese Academy of Sciences (CAS); Beijing China
2CAS Key Laboratory for Computational Biology, CAS-MPG Partner Institute for Computational Biology, Chinese Academy of Sciences (CAS), Shanghai, China.
3School of Agriculture and Food Science Zhejiang A & F University Hangzhou China
4Biogle Genome Editing Research Center, Hangzhou, China.
5Department of Cellular and Structural Biology, University of Texas Health Science Center, San Antonio, TX USA

Tóm tắt

Abstract

Melatonin, an antioxidant in both animals and plants, has been reported to have beneficial effects on the aging process. It was also suggested to play a role in extending longevity and enhancing abiotic stress resistance in plant. In this study, we demonstrate that melatonin acts as a potent agent to delay leaf senescence and cell death in rice. Treatments with melatonin significantly reduced chlorophyll degradation, suppressed the transcripts of senescence‐associated genes, delayed the leaf senescence, and enhanced salt stress tolerance. Genome‐wide expression profiling by RNA sequencing reveals that melatonin is a potent free radical scavenger, and its exogenous application results in enhanced antioxidant protection. Leaf cell death in noe1, a mutant with over‐produced H2O2, can be relieved by exogenous application of melatonin. These data demonstrate that melatonin delays the leaf senescence and cell death and also enhances abiotic stress tolerance via directly or indirectly counteracting the cellular accumulation of H2O2.

Từ khóa


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Thông tin xuất bản

Journal of Pineal Research

Tập 59 Số 1

91-101

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