Silicon and salicylic acid confer high-pH stress tolerance in tomato seedlings.

ABSTRACT: Alkalinity is a known threat to crop plant growth and production, yet the role of exogenous silicon (Si) and salicylic acid (SA) application has been largely unexplored. Here, we sought to understand the beneficial impacts of Si and SA on tomato seedlings during high-pH (9.0) stress. Results showed that Si- and SA-treated plants displayed higher biomass, chlorophyll contents, relative leaf water and better root system than none-treated plants under alkaline conditions. Both Si and SA counteracted the alkaline stress-induced oxidative damage by lowering the accumulation of reactive oxygen species and lipid peroxidation. The major antioxidant defence enzyme activities were largely stimulated by Si and SA, and these treatments caused significantly increased K⁺ and lowered Na^+<

SUBMITTER: Khan A 

PROVIDER: S-EPMC6930214 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature