2011•Jiangsu nongye xuebaoRequires access
Effect of 5-aminolevulinic acid on the ascorbate-glutathione system of pepper leaves under low temperature stress.
Tao Liu, Gang Xu, Wenrui Gao, Guo ShiRong, Li DeCui, Sun Yan-jun
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Abstract
Effect of 5-aminolevulinic acid(ALA,25 mg/L) on the production rate of active oxygen(O2 ·-),the activities of antioxidant enzymes and the content of antioxidants in AsA-GSH cycle was investigated with pepper variety Chaoyue No.5 in flowering stage under low temperature stress.Results showed that 25 mg/L ALA significantly decreased the production rate of O2 ·-and the activities of DHAR,increased the activities of APX,GR,MDHAR and the content of AsA,GSH,as well as the ratio of AsA/DHA and GSH/GSSG under low temperature stress.The activites of APX,GR and DHAR were slightly decreased after restoration under normal conditions.It indicates that exogenous ALA treatment could allieviate the injuries caused by active oxygen through increasing the content of antioxidants and the activities of antioxidant enzymes in the cycle of AsA-GSH and decreasing the production rate of O2 ·-in pepper leaves under low temperature stress.