Advances in Roles of Salicylic Acid in Plant Tolerance Responses to Biotic and Abiotic Stresses
Author:
Song Weiyi12, Shao Hongbo34ORCID, Zheng Aizhen12, Zhao Longfei12, Xu Yajun12
Affiliation:
1. School of Biology and Food, Shangqiu Normal University, Shangqiu 476000, China 2. Key Laboratory on Agricultural Microorganism Resources Development of Shangqiu, Shangqiu 476000, China 3. Jiangsu Key Laboratory for Bioresources of Saline Soils, Jiangsu Synthetic Innovation Center for Coastal Bio-Agriculture, Yancheng Teachers University, Yancheng 224002, China 4. Salt-Soil Agricultural Center, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agriculture Sciences (JAAS), Nanjing 210014, China
Abstract
A multitude of biotic and abiotic stress factors do harm to plants by bringing about diseases and inhibiting normal growth and development. As a pivotal signaling molecule, salicylic acid (SA) plays crucial roles in plant tolerance responses to both biotic and abiotic stresses, thereby maintaining plant normal growth and improving yields under stress. In view of this, this paper mainly discusses the role of SA in both biotic and abiotic stresses of plants. SA regulates the expression of genes involved in defense signaling pathways, thus enhancing plant immunity. In addition, SA mitigates the negative effects of abiotic stresses, and acts as a signaling molecule to induce the expression of stress-responsive genes and the synthesis of stress-related proteins. In addition, SA also improves certain yield-related photosynthetic indexes, thereby enhancing crop yield under stress. On the other hand, SA acts with other signaling molecules, such as jasmonic acid (JA), auxin, ethylene (ETH), and so on, in regulating plant growth and improving tolerance under stress. This paper reviews recent advances in SA’s roles in plant stress tolerance, so as to provide theoretical references for further studies concerning the decryption of molecular mechanisms for SA’s roles and the improvement of crop management under stress.
Funder
Double-innovation Talent Plan of Jiangsu Province, China Natural Science Foundation of Henan Province Key Specialized Research and Development Program of Henan Province
Subject
Plant Science,Ecology,Ecology, Evolution, Behavior and Systematics
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