水杨酸甲酯、苯骈噻唑及茉莉酸甲酯对合作杨防御物质的影响

Effects of BTH,MeSA and MeJA on Defensive Components of Populus simonii×P. pyramidalis

采用熏蒸的方法,研究了3种人工合成挥发性物质对合作杨防御物质的诱导能力。结果表明:水杨酸甲酯和苯骈噻唑对合作杨植株体内产生于茉莉酸信号转导途径的萜烯类挥发物的释放具有抑制作用;而用茉莉酸甲酯对合作杨植株萜烯类挥发物的释放具有明显的促进作用。结合植物体内的直接防御物质多酚氧化酶和过氧化物酶活性的测定,表明茉莉酸信号转导途径在诱导合作杨间接和直接防御能力的过程中起着关键作用。

The present article studied the effects of three synthesized volatiles on the induction of defensive components of Populus simonii×P.pyramidalis c.v by the method of fumigation.Treatment of plants with gaseous BTH and MeSA suppressed the productions of terpenoids which involved in jasmonate-signal transduction pathways.However,MeJA could not only prompted the release of volatile signals,but also enhanced enzyme activity of PPO and POD in the leaves.The results indicated that jasmonate-signal transduction pathway played crucial role in the induction of direct and indirect defense of P.simonii×P.pyramidalis c.v.