Salt and Drought Stress Signal Transduction in Plants

Zhu, Jian-Kang (2002) Salt and Drought Stress Signal Transduction in Plants. Annual Review of Plant Biology, 53. pp. 247-273.

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Salt and drought stress signal transduction consists of ionic and osmotic homeostasis signaling pathways, detoxification (i.e., damage control and repair) response pathways, and pathways for growth regulation. The ionic aspect of salt stress is signaled via the SOS pathway where a calcium-responsive SOS3-SOS2 protein kinase complex controls the expression and activity of ion transporters such as SOS1. Osmotic stress activates several protein kinases including mitogen-activated kinases, which may mediate osmotic homeostasis and/or detoxification responses. A number of phospholipid systems are activated by osmotic stress, generating a diverse array of messenger molecules, some of which may function upstream of the osmotic stress–activated protein kinases. Abscisic acid biosynthesis is regulated by osmotic stress at multiple steps. Both ABA-dependent and -independent osmotic stress signaling first modify constitutively expressed transcription factors, leading to the expression of early response transcriptional activators, which then activate downstream stress tolerance effector genes.

Item Type: Article
Additional Information: I thank Liming Xiong, Becky Stevenson, Masaru Ohta, and Satoshi Iuchi for assistance in the preparation of this manuscript. Research in my laboratory is supported by grants from the U.S. National Institutes of Health, the U.S. National Science Foundation, and the U.S. Department of Agriculture
Uncontrolled Keywords: osmotic stress, abscisic acid, SOS, protein kinase, phospholipid, calcium signaling, gene expression
Author Affiliation: Department of Plant Sciences, University of Arizona, Tucson, Arizona 85721
Subjects: Plant Production
Plant Physiology and Biochemistry > Plant Physiology
Divisions: General
Depositing User: Mr Balakrishna Garadasu
Date Deposited: 25 May 2013 14:53
Last Modified: 25 May 2013 14:53
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