Melatonin-Induced Chromium Tolerance Requires Hydrogen Sulfide Signaling in Maize.

ABSTRACT: Both melatonin and hydrogen sulfide (H₂S) mitigate chromium (Cr) toxicity in plants, but the specific interaction between melatonin and H₂S in Cr detoxification remains unclear. In this study, the interaction between melatonin and H₂S in Cr detoxification was elucidated by measuring cell wall polysaccharide metabolism and antioxidant enzyme activity in maize. The findings revealed that exposure to Cr stress (100 μM K₂Cr₂O₇) resulted in the upregulation of L-/D-cysteine desulfhydrase (LCD/DCD) gene expression, leading to a 77.8% and 27.3% increase in endogenous H₂S levels in maize leaves and roots, respectively. Similarly, the endogenous melatonin system is activated in response to Cr st

SUBMITTER: Yang X 

PROVIDER: S-EPMC11244195 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature