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在对苏椒5号和苏长红进行低温处理的基础上,研究了低温解除后辣椒叶片中内源激素的动态变化。结果表明,低温促进了辣椒叶片中ABA的合成,且苏椒5号大于苏长红,低温解除5 d后,ABA含量恢复至对照水平,这可能是植株自身对低温的一种应激反应,低温解除,ABA代谢恢复;低温抑制了GA3和IAA的合成,其中,苏长红受抑制程度较苏椒5号明显,随着低温条件的解除,IAA含量在25 d后逐渐恢复到对照水平,苏椒5号的GA3含量于25 d恢复正常,而苏长红的GA3含量因低温伤害始终低于对照;苏椒5号的ABA/GA3在低温解除25 d后恢复至对照水平,苏长红无法恢复;低温解除后25 d,2个辣椒品种的ABA/IAA达到对照水平,之后,苏椒5号的ABA/IAA低于对照,而苏长红则高于对照,可见2个辣椒品种有不同的低温适应能力。
Based on the low temperature treatment of Sujiao 5 and Suchanghong, the dynamic changes of endogenous hormones in pepper leaves after low temperature release were studied. The results showed that low temperature promoted the synthesis of ABA in pepper leaves, and the content of ABA in Su pepper 5 was higher than that of Su longhong. The ABA content returned to the control level after 5 days of low temperature release, which may be a stress response of plant itself to low temperature, , ABA metabolism restored; low temperature inhibited the synthesis of GA3 and IAA, in which the inhibition of Su Changhong obvious than the Jiaojiao 5, with the release of low temperature conditions, IAA content gradually returned to the control level after 25 d, GA3 content returned to normal after 25 days, while the GA3 content of Suchanghong remained lower than the control due to low temperature injury. ABA / GA3 of Sujiao 5 returned to the control level after 25 days of low temperature release, ABA / IAA of two pepper cultivars reached the control level. Afterwards, the ABA / IAA of Sujiao 5 was lower than that of the control, while that of Su Changhong was higher than that of the control. Thus, two pepper cultivars had different low temperature adaptability.