干旱胁迫对皱叶酸模相关生理指标的影响  

Effect of Drought Stress on Physiological Characteristics of Rumex crispus L.

作　　者：郎晓冰 艾丽花 姜夕雷 陈世华[1] 尹海波[1] 郭善利[1] 

机构地区：[1]烟台大学生命科学学院,山东烟台264005

出　　处：《烟台大学学报（自然科学与工程版）》2017年第3期197-201,共5页Journal of Yantai University(Natural Science and Engineering Edition)

基　　金：国家自然科学基金资助项目(31370296);山东省泰山学者种业人才团队资助项目(Ntszy01)

摘　　要：以皱叶酸模(Rumex crispus L.)幼苗为实验材料,采用聚乙二醇6000(PEG 6000)模拟干旱胁迫的方法,研究干旱胁迫对皱叶酸模幼苗的生理特性影响.结果显示:随着干旱胁迫程度的加强,皱叶酸模的叶绿素含量呈现下降趋势,而根和叶的相对电导率、丙二醛(MDA)含量、脯氨酸含量都显现上升趋势,超氧化物歧化酶(SOD)、过氧化氢酶(CAT)都呈现先上升后下降趋势,但是它们的最大值并不在一个胁迫程度上.皱叶酸模幼苗可以通过调节脯氨酸含量,以及提高保护酶的活性来适应轻度和中度干旱胁迫.In this work, the physiological effect of artificial drought stress mimicked using polyethylene glycol （ PEG the seedlings of Rumex crispus L. is studied. Results show that, with the level of drought stress in- creased, the chlorophyll content tends to decrease; while the relative electrical conductivity, the content of malond- ialdehyde （MDA） and proline tends to increase. Drought stress also causes the enzymatic antioxidant response, the SOD and CAT activity shows an upward trend at the initial phase and then decreases when the drought stress rises above a threshold level, but their maximum values doesnt appear at the same time. These results indicate that the seedlings of R. crispus can adapt to the mild and moderate drought stress through regulating the content of proline and the activity of enzymatic antioxidant element.

关 键 词：皱叶酸模(Rumex CRISPUS L.) 聚乙三醇6000 生理指标 

分 类 号：Q945.78[生物学—植物学]