摘要
以芝麻品种"中芝10号"为材料,采用聚乙二醇(PEG 6000)模拟干旱胁迫的方法,研究了脱落酸(ABA)和水杨酸(SA)处理的芝麻幼苗在干旱胁迫(聚乙二醇浓度为0、20%、25%和30%)下的几项生理指标的变化。结果表明,芝麻幼苗的超氧化物歧化酶(SOD)、过氧化物酶(POD)、过氧化氢酶(CAT)的活性都比对照组(CK)高,脱落酸和水杨酸都能延缓干旱胁迫时芝麻叶片含水量的降低,丙二醛(MDA)的含量明显升高、可溶性糖(SS)的含量总体先升高后降低,芝麻幼苗的叶绿素含量呈下降趋势,而chla/chlb和car/chl逐渐上升。脱落酸与水杨酸之间表现出一定的差异,说明脱落酸和水杨酸在不同干旱胁迫下提高植物抗逆性的程度不同。
The seedling of sesame Zhongzhi 10 was treated with abscisic acid and salicylic acid under drought stress of PEG 6000 （20 %, 25 %, 30 % ）. The activities of super oxide dismutase （SOD）, peroxidase （POD） and catalase （CAT）, relative water content （RWC）, content of malondiadehyde （MDA）, soluble sugar （SS） and photosynthetic pigment of the seedling were studied. The results indicated that the activities of SOD, POD, CAT in the sesame seedling in the group with ABA or SA were higher than those of the control group. The ABA and SA could slowdown the reduction of RWC of the sesame seedling under drought stress. The malondialdehyde （MDA） content increased significantly and the content of soluble sugar increased at first and then decreased gradually, while the chlorophyll content always decreased and the chla/chlb and car/chl increased gradually. The results demonstrated that there were some differences among effects on physiological characteristics of the sesame seedling under drought stress between ABA and SA.
出处
《干旱地区农业研究》
CSCD
北大核心
2008年第6期163-166,172,共5页
Agricultural Research in the Arid Areas
基金
长江大学科研基金重点项目(HNZD200201)
作者简介
严寒（1974-），男，湖北广水人，讲师，主要从事植物逆境生理的研究。E-mail：yhsky@yangtzeu．edu．cn。
通讯作者：田志宏，男，教授，E-mail：zhtian@yangtzeu．edu．cn。
