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当前位置: 首页 > 文章 > 施加钙对锶胁迫下麻疯树生长及生理生化的影响 核农学报 2015,29 (2) 405-411
Position: Home > Articles > The Physiological and Biochemical Responses of Jatropha curcas L.Under Sr~(2+) Stress With Exogenous Ca~(2+) Journal of Nuclear Agricultural Sciences 2015,29 (2) 405-411

施加钙对锶胁迫下麻疯树生长及生理生化的影响

作  者：
杨叶;陈珂;朱靖
单  位：
西南科技大学生命科学与工程学院
关键词：
麻疯树;锶胁迫;外源钙
摘  要：
为了研究外源钙对锶胁迫下麻疯树生理生化的影响,本试验以麻疯树为研究材料,施加88Sr2+(200mg·kg-1)与不同浓度Ca2+(0、100和200mg·kg-1),处理30、70和120 d后取样,测定生长指标及生理生化等指标,以此研究Ca2+对麻疯树所受Sr2+胁迫的调节作用。结果表明:施加Ca2+促进了株高和叶面积增加,并在前期大量促进叶绿素的合成;最大荧光Fm和最大光化学效率Fv/Fm等荧光参数随着处理时间逐渐升高并在120 d时显著高于对照组,表明Ca2+降低了胁迫对PSII反应中心的损害;施加Ca2+后幼苗SOD、POD和CAT活性明显降低,说明88Sr2+胁迫对抗氧化防御系统的刺激有所降低;丙二醛与脯氨酸含量的降低也表明施加Ca2+缓解了幼苗所受88Sr2+胁迫。通过对比,低浓度Ca2+能够更好地缓解胁迫,对株高、株茎和叶面积的促进作用明显高于高浓度Ca2+处理。在处理30 d时,低浓度Ca2+对叶绿素含量、Fv/Fm和电子传递速率ETR的调节效果更明显。因此,Ca2+可以在一定程度上缓解88Sr2+对麻疯树幼苗的胁迫,并且低浓度Ca2+的缓解效果更明显。研究结果为木本植物修复放射性核素污染土壤提供了一定的科学依据。
译  名：
The Physiological and Biochemical Responses of Jatropha curcas L.Under Sr~(2+) Stress With Exogenous Ca~(2+)
作  者：
YANG Ye;CHEN Ke;ZHU Jing;School of Life Science and Engineering,Southwest University of Science and Technology;State Defence Key Laboratory of the Nuclear Waste and Environmental Security,Southwest University of Science and Technology;
关键词：
Jatropha curcas L.,strontium stress,exogenous Ca2 +
摘  要：
In order to study the physiological and biochemical responses of Jatropha curcas L. under Sr2 +stress with different concentrations of exogenous Ca2 +,J. curcas L. were stressed under 200 mg·kg- 1 88Sr2 +with Ca2 +( 0、100 and200 mg·kg- 1) added to study the effects of exogenous Ca2 +on seedlings indicator changes under high concentration of strontium stress after 30 d,70 d and 120 d respectively,and measure the experimental data including growth index,physiological and biochemical index. The main results showes that: The treatments of Sr2 +with Ca2 +added could promote the increase of plant height and leaf area as well as the synthesis of chlorophyll in the prophase,Fmand Fv/ Fm increased firstly and became higher than the control( under the single stress of Sr2 +) with a significant difference after120 days and it means that Ca2 +could reduce the stress on PSII reaction center. The activities of POD,SOD and CAT enzyme were reduced obviously with Ca2 +,which means that exogenous Ca2 +can further stimulate the antioxidant defense system under Sr2 +stress. The decrease of MDA and Pro can also indicate the relief of Sr2 +stress on J. curcas.By contrast, it is more significant that the plant height, stem and leaf area were promoted obviously with low concentration of Ca2 +added and it also effect more obviously on the adjustment of chlorophyll content,Fv / Fm and ETR after 30 d. Accordingly,Ca2 +could reduce the Sr2 +stress on J. curcas seedlings and Ca2 +with low concentration works more obviously. Our results could provide a theoretic evidence for remediation of radionuclide contaminated soil with woody plants.

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