Volume 49, Issue 6 pp. 742-750
Free Access

Understanding Abiotic Stress Tolerance Mechanisms: Recent Studies on Stress Response in Rice

Ji-Ping Gao

Ji-Ping Gao

National Key Laboratory of Plant Molecular Genetics, Shanghai Institute of Plant Physiology and Ecology, Shanghai Institute for Biological Sciences, the Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences, Shanghai 200032, China

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Dai-Yin Chao

Dai-Yin Chao

National Key Laboratory of Plant Molecular Genetics, Shanghai Institute of Plant Physiology and Ecology, Shanghai Institute for Biological Sciences, the Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences, Shanghai 200032, China

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Hong-Xuan Lin

Corresponding Author

Hong-Xuan Lin

National Key Laboratory of Plant Molecular Genetics, Shanghai Institute of Plant Physiology and Ecology, Shanghai Institute for Biological Sciences, the Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences, Shanghai 200032, China

*Author for correspondence. Tel: +86 (0)21 5492 4129, +86 (0)21 5492 4132; Fax: +86 (0)21 5492 4015; E-mail: <[email protected]>.Search for more papers by this author
First published: 15 June 2007
Citations: 162

Supported by the State Key Basic Research and Development Plan of China (2006CB100100), the Knowledge Innovation Program of the Chinese Academy of Sciences (KSCX2-YW-N-011), the Shanghai Key Basic Research Foundation and Program of Shanghai Subject Chief Scientist (05DJ14008 and 06XD14023).

Publication of this paper is supported by the National Natural Science Foundation of China (30624808).

Abstract

Abiotic stress is the main factor negatively affecting crop growth and productivity worldwide. The advances in physiology, genetics, and molecular biology have greatly improved our understanding of plant responses to stresses. Rice plants are sensitive to various abiotic stresses. In this short review, we present recent progresses in adaptation of rice to salinity, water deficit and submergence. Many studies show that salt tolerance is tightly associated with the ability to maintain ion homeostasis under salinity. Na+ transporter SKC1 unloads Na+ from xylem, plasma membrane Na+/H+ antiporter SOS1 excludes sodium out of cytosol and tonoplast Na+/H+ antiporter NHX1 sequesters Na+ into the vacuole. Silicon deposition in exodermis and endodermis of rice root reduces sodium transport through the apoplastic pathway. A number of transcription factors regulate stress-inducible gene expression that leads to initiating stress responses and establishing plant stress tolerance. Overexpression of some transcription factors, including DREB/CBF and NAC, enhances salt, drought, and cold tolerance in rice. A variant of one of ERF family genes, Sub1A-1, confers immersion tolerance to lowland rice. These findings and their exploitation will hold promise for engineering breeding to protect crop plants from certain abiotic stresses.

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