Roles of salicylic acid in selenium-enhanced salt tolerance in tomato plants

Selenium (Se) has been reported to mitigate the harmful effects of salt stress on plants; however, internal mechanisms remain unknown. Here, Se supplementation tomato plants under were investigated. The biomass, relative electrical conductivity (REC), water content (RWC), photosynthetic parameter, inorganic ion contents, malondialdehyde (MDA), soluble sugar and proline as well regulation plant hormones application in investigated after exposure treatments. Exogenous improved photosynthesis use efficiency (WUE) stress, thereby promoting growth stress. also maintained K+ Na+ homeostasis, reduced REC, decreased MDA, H2O2 O2•? mitigated oxidative damage caused by In addition, exogenous increased salicylic acid (SA) leaves roots via up-regulating PAL or ICS pathways involved SA biosynthesis. After pre-treatment with inhibitor 1-aminobenzotriazole, decreased, was weakened, REC increased, indicating that alleviating role abolished. Our results clarified roles its tolerance critical involvement this process. study abiotic will give a more theoretical foundation for using agricultural production enhance crop yield adversity stresses.