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Int J Biol Sci 2008; 4(2):116-125. doi:10.7150/ijbs.4.116 This issue Cite

Review

Relationship between calcium decoding elements and plant abiotic-stress resistance

Wei-Yi Song^{1, 6}, Zheng-Bin Zhang¹, Hong-Bo Shao^{2, 3, 5}, Xiu-Lin Guo⁴, Hong-Xing Cao^{1, 6}, Hong-Bin Zhao^{1, 6}, Zheng-Yan Fu^{1, 6}, Xiao-Jun Hu^{1, 6}

1. Center for Agricultural Resources Research, Institute of Genetic &Developmental Biology, Chinese Academy of Sciences, Shijiazhuang, 050021, China
2. Binzhou University, Binzhou, 256603, China
3. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling712100, China
4. Institute of Genetics and Physiology, Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang 050051, China
5. Institute of Life Sciences, Qingdao University of Science&Technology, Qingdao266042, China
6. Graduate University of Chinese Academy of Sciences, Beijing10049, China

Abstract

Serving as an important second messenger, calcium ion has unique properties and universal ability to transmit diverse signals that trigger primary physiological actions in cells in response to hormones, pathogens, light, gravity, and stress factors. Being a second messenger of paramount significance, calcium is required at almost all stages of plant growth and development, playing a fundamental role in regulating polar growth of cells and tissues and participating in plant adaptation to various stress factors. Many researches showed that calcium signals decoding elements are involved in ABA-induced stomatal closure and plant adaptation to drought, cold, salt and other abiotic stresses. Calcium channel proteins like AtTPC1 and TaTPC1 can regulate stomatal closure. Recently some new studies show that Ca²⁺ is dissolved in water in the apoplast and transported primarily from root to shoot through the transpiration stream. The oscillating amplitudes of [Ca²⁺]_o and [Ca²⁺]_i are controlled by soil Ca²⁺ concentrations and transpiration rates. Because leaf water use efficiency (WUE) is determined by stomatal closure and transpiration rate, so there may be a close relationship between Ca²⁺ transporters and stomatal closure as well as WUE, which needs to be studied. The selection of varieties with better drought resistance and high WUE plays an increasing role in bio-watersaving in arid and semi-arid areas on the globe. The current paper reviews the relationship between calcium signals decoding elements and plant drought resistance as well as other abiotic stresses for further study.

Keywords: Calcium signals decoding elements, Stomatal closure, Water use efficiency (WUE), Abiotic stress-resistance

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