It was reported that H_2O_2 may mediate ABA topromote stomatal closure, but it was not known whether H_2O_2 was involved in stomatalclosuring induced by SA, which was advantageous for plant defense.

• 已有报道H_2O_2可能作为ABA的下游信号分子促进气孔关闭，但H_2O_2是否参与了SA诱导气孔关闭提高植物抗病性这一信号传递过程还不清楚?