Signal transduction during cold, salt, and drought stresses in plants |
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Authors: | Guo-Tao Huang Shi-Liang Ma Li-Ping Bai Li Zhang Hui Ma Ping Jia Jun Liu Ming Zhong Zhi-Fu Guo |
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Institution: | (1) College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, 110866, Liaoning, China;(2) Key Laboratory of Agricultural Biotechnology of Liaoning Province, Shenyang, 110866, Liaoning, China;(3) Dandong Academy of Agricultural Sciences, 118109, Liaoning, Dandong, China; |
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Abstract: | Abiotic stresses, especially cold, salinity and drought, are the primary causes of crop loss worldwide. Plant adaptation to
environmental stresses is dependent upon the activation of cascades of molecular networks involved in stress perception, signal
transduction, and the expression of specific stress-related genes and metabolites. Plants have stress-specific adaptive responses
as well as responses which protect the plants from more than one environmental stress. There are multiple stress perception
and signaling pathways, some of which are specific, but others may cross-talk at various steps. In this review article, we
first expound the general stress signal transduction pathways, and then highlight various aspects of biotic stresses signal
transduction networks. On the genetic analysis, many cold induced pathways are activated to protect plants from deleterious
effects of cold stress, but till date, most studied pathway is ICE-CBF-COR signaling pathway. The Salt-Overly-Sensitive (SOS)
pathway, identified through isolation and study of the sos1, sos2, and sos3 mutants, is essential for maintaining favorable ion ratios in the cytoplasm and for tolerance of salt stress. Both ABA-dependent
and -independent signaling pathways appear to be involved in osmotic stress tolerance. ROS play a dual role in the response
of plants to abiotic stresses functioning as toxic by-products of stress metabolism, as well as important signal transduction
molecules and the ROS signaling networks can control growth, development, and stress response. Finally, we talk about the
common regulatory system and cross-talk among biotic stresses, with particular emphasis on the MAPK cascades and the cross-talk
between ABA signaling and biotic signaling. |
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