枳对逆境胁迫的生理响应

目的]研究枳在几种胁迫下的生理响应。方法]以1年生枳实生苗为材料,测定低温、干旱、盐胁迫下枳叶的生理指标。结果]枳叶片超氧化物歧化酶（SOD）活性在低温胁迫10 d后显著增强,干旱、盐胁迫过程变化趋势一致,先小幅增强,后下降;过氧化物酶（POD）活性3种处理过程中均呈先上升后下降趋势,且比对照高;过氧化氢酶（CAT）活性变化与POD活性类似,只是低温、干旱胁迫中应答迟缓;游离脯氨酸（Pro）的含量在3种胁迫下均比对照高,且随着胁迫时间的延长,Pro的含量逐渐增加;可溶性蛋白含量在低温胁迫过程中快速大幅度上升,在干旱、盐胁迫过程中变化不明显。结论]明晰了胁迫下枳叶片相关几种酶和成分的变化规律,为枳栽培和抗性育种提供了理论基础。

Research on the Physiological Responses of Poncirus trifoliata(L.)Raf to Abiotic Stress

Objective] The physiological response of P.trifoliata seedling to stress was researched.Method] The physiological indicator of P.trifoliata seedling with one old year under the stress of cold,drought or NaCl was measured.Result] The activity of SOD in P.trifoliata seedling leaf was greatly increased on the 10th day after cold stress treatment and there was same variation trend in the activity of SOD in P.trifoliata seedling leaf under the treatment of drought and NaCl stress,which was increased firstly o...