Effects of Spraying Linoleic Acid on Stress Resistance of Tobacco

doi:10.11924/j.issn.1000-6850.casb17060053

Abstract

Abstract: To investigate whether linoleic acid could enhance the stress resistance of tobacco, different concentrations of linoleic acid were sprayed to tobacco. The activities of antioxidant enzymes and the contents of proline, soluble sugar, H2O2 and MDA were detected. The expression levels of genes related to stress resistance were also detected by qPCR. Results showed that linoleic acid reduced the contents of MDA in tobacco leaves, but increased the content of proline, soluble sugar, H2O2 and POD activity. The expression levels of rbohD, rbohF, WRKY57, PR-1a, JAZ1 and APX were also increased, especially at 10 mM concentration. Suggesting that linoleic acid enhanced stress tolerance of tobacco. Moreover, the best effects were got at 10 mM linoleic acid treatment.

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