H2O2 mediates ALA-induced glutathione and ascorbate accumulation in the perception and resistance to oxidative stress in Solanum lycopersicum at low temperatures.

ABSTRACT: BACKGROUND:Low temperature is a crucial factor influencing plant growth and development. The chlorophyll precursor, 5-aminolevulinic acid (ALA) is widely used to improve plant cold tolerance. However, the interaction between H2O2 and cellular redox signaling involved in ALA-induced resistance to low temperature stress in plants remains largely unknown. Here, the roles of ALA in perceiving and regulating low temperature-induced oxidative stress in tomato plants, together with the roles of H2O2 and cellular redox states, were characterized. RESULTS:Low concentrations (10-25 mg·L- 1) of ALA enhanced low temperature-induced oxidative stress tolerance of tomato seedlings. The most effective concentration was 25 mg·L- 1, which markedly increased the ratio of reduced glutathione and ascorbate (GS

SUBMITTER: Liu T 

PROVIDER: S-EPMC5815209 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature