费菜在水分胁迫下的生理响应研究  

Physiological responses of Sedum aizoon under water stress

作　　者：曾红[1] 杨柳青[1] 朱小青[1] 吴红强 刘志昂 廖飞勇[1] 陈月华[1] 黄琛斐[1] 

机构地区：[1]中南林业科技大学,湖南长沙410004 [2]湘潭市林科所,湖南湘潭411206

出　　处：《中南林业科技大学学报》2015年第7期115-120,共6页Journal of Central South University of Forestry & Technology

基　　金：中南林业科技大学研究生创新CX2014B11);湖南省研究生科研创新项目(CX2014B335);湖南省教育厅重点项目(13A126)

摘　　要：为了解费菜对水分胁迫的反应和适应性,研究了费菜在不同水分梯度的胁迫下,其叶片水分饱和亏缺(RWD)、相对含水率(RWC)、质膜相对透性、叶绿素含量、荧光参数等各项生理指标的变化。结果表明:水淹胁迫影响费菜的正常生长,表现为叶片RWD、相对电导率、Fv/Fm、qP、ETR先升高后降低;叶片RWC、叶绿素含量、qN和Fv′/Fm′先降低后回升。重度干旱胁迫和极度干旱胁迫严重抑制费菜的生长、甚至枯死。整体趋势表现为RWD、相对电导率、qP、ETR升高,叶片RWC、叶绿素含量、qN、Fv/Fm和Fv′/Fm′降低。轻度干旱胁迫和中度干旱胁迫组各项指标与对照组差别不大,对费菜生长没有造成明显的影响,说明其对这两种梯度的水分胁迫具有比较强的适用力。In order to understand Sedum aizoon＇s reaction and adaptability to water stress, the changes in the physiological indexes such as leaves water saturation deficit （DLWSD）, relative water content （CRWC）, membrane permeability, chlorophyll content and fluorescence parameters were studied with different moisture gradient of water stress. The results show that the flooding stress had an effect on the normal growth of S. aizoon, the process was manifested as the values of leaves CRwc, relative electrolytic leakage, Fv/Fm, qp and RETR ascended first and then declined; the values of leaves CRWC, chlorophyll content, qN and Fv＇/Fm＇ decreased first but later recovered; Severe drought stress and extreme drought stress severely inhibited the growth of S.aizoon, even lead to death; and the overall trend showed that the values of DLWSD, relative electrolytic leakage, qp, RETR increased, the values of leaves CRWC, chlorophyll content, qN, Fv/Fm and Fv＇/Fm＇ decreased; The indicators of mild drought stress and moderate drought stress group had little differences with the control group, they did not cause a significant effect on the growth ofS. aizoon, thus indicating that S. aizoon had a strong adaptability to the two kinds of water stress gradient.

关 键 词：多年生草本植物 费菜 水分胁迫 生理响应 适应性 

分 类 号：S718.43[农业科学—林学] S682.3