mediates stomatal movement in response to drought stress by repressing expression.

Drought stress limits plant development and reproduction. Multiple mechanisms in plants are activated to respond to stress. The MYC2 transcription factor is a core regulator of the jasmonate (JA) pathway and plays a vital role in the crosstalk between abscisic acid (ABA) and JA. In this study, we found that responded to drought stress and regulated stomatal aperture in tomato (). Overexpression of repressed expression and decreased the flavonol content, increased the reactive oxygen species (ROS) content in guard cells and promoted the accumulation of JA and ABA in leaves. Additionally, silencing the gene produced a phenotype that was similar to that of the overexpressing (-OE) strain, especially in terms of stomatal dynamics and ROS levels. Finally, we confirmed that directly repressed the expression of . Our study revealed that drove stomatal closure by modulating the accumulation of flavonol and the JA and ABA contents, helping us decipher the mechanism of stomatal movement under drought stress.