Physiological Mechanism of Salicylic Acid for Alleviation of Salt Stress in Rice

作     者：D.JINI B.JOSEPH 

作者机构：Department of BiotechnologyManonmaniam Sundaranar UniversityTirunelveli 627012Tamil NaduIndia DeanCentre for Research and ConsultancyHindustan University/Institute of Technology and SciencePadurKelambakkamChennai 603103Tamil NaduIndia 

出 版 物：《Rice science》 (水稻科学（英文版）)

年 卷 期：2017年第24卷第2期

页      面：97-108页

核心收录：

学科分类：09[农学] 0901[农学-作物学] 

主　　题：salicylic acid salt tolerance Oryza sativa NaCl germination physiology 

摘      要：Soil salinity is one of the most important problems of crop production in estuarine and coastal zones. Improvement in salt tolerance of major food crops is an important way for the economic utilization of coastal zones. This study proved that the application of salicylic acid(SA) improved the growth and yield under salt stress conditions and investigated its physiological mechanisms for salt tolerance. The investigation on the effect of SA for salt tolerance during germination showed that the decreased rates of germination and growth(in terms of shoot and root lengths) by the salt stress were significantly increased by the SA application(SA + NaCl). The treatment of SA to the high and low saline soils enhanced the growth, yield and nutrient values of rice. The effects of SA on Na^+, K^+ and Cl~– ionic accumulation were traced under salt stress condition by inductively coupled plasma optical emission spectrometry and ion chromatography. It was revealed that the increased accumulation of Na^+ and Clˉ ions by the salt stress were reduced by SA application. An increased concentration of endogenous SA level was detected from the SA-treated rice varieties(ASD16 and BR26) by liquid chromatography electrospray Ionization-tandem mass spectrometry. The activities of antioxidant enzymes such as superoxide dismutase, catalase and peroxidase were increased by salt stress whereas decreased by the SA application. The study proved that the application of SA could alleviate the adverse effects of salt stress by the regulation of physiological mechanism in rice plants. In spite of salt stress, it can be applied to the coastal and estuarine regions to increase the rice production.