Results of exogenous experiments showed that SA inhibited LR formation and the intensity was corrected with concentrations, though SA also inhibited seminal root elongation as that of JA.

• 外源处理结果则表明虽然 SA也和 JA一样可以抑制种子根的伸长，但对侧根发生的影响却与 JA不同，外源SA显著抑制水稻幼苗侧根的发生，且抑制程度随SA浓度的增大而增加。