Effects of Water Stress on Leaf Water and Chlorophyll Fluorescence Parameters of Sugarcane Seedling  

干旱胁迫对苗期甘蔗叶片水分和叶绿素荧光参数的影响(摘要)(英文)

作　　者：朱理环[1][2] 邢永秀[1][2] 杨丽涛[1][2] 李杨瑞[2] 杨荣仲[2] 莫磊兴[2] Li-huan Yong-xiu Li-tao Yang-rui Rong-zhong Lei-xing 

机构地区：[1]广西大学农学院,广西南宁,530005 [2]农业部甘蔗品质监督检验测试中心(南宁

出　　处：《Agricultural Science & Technology》2010年第5期17-21,共5页农业科学与技术（英文版）

基　　金：Supported by Key Projects in the National Science &Technology Pillar Program (2007BAD30B05);Key Project of Science and Tech-nology Department of Guangxi Province of China (0782004-5);the Program for Postgraduates Research Innovattion in GX. Univer-sity (105930903049)~~

摘　　要：[Objective] The aim was to explore the effects of water stress on leaf water and chlorophyll fluorescence parameters of sugarcane seedling,as well as to provide basis for the study on sugarcane production and evaluation. [Method] Seven different sugarcane varieties were studied at the seedling stage under drought stress,and the changes of leaf water and chlorophyll fluorescence parameters under stress conditions were detected. [Result] leaf water potential,leaf relative water content and soil relative water content showed a certain amount of internal relationship,the sugarcane varieties that had more tolerant to drought had higher utilization rate of soil water; the correlation analysis and factor analysis suggested that the survival rate at seedling stage under drought stress,Fv/Fm,leaf water potential and relative water content could be used as drought resistance evaluation indicators. [Conclusion] As a relatively independent influencing factor,water potential had dominating effect on drought resistance,and the reliability of Fv/Fm as drought resistance evaluation indicator had been verified.[目的]研究干旱胁迫对甘蔗叶片水分和叶绿素荧光参数的影响,为甘蔗生产及评价研究提供依据。[方法]选取7个抗旱性不同的甘蔗品种,在苗期进行干旱胁迫,并测定胁迫条件下甘蔗叶片水分含量和叶绿素荧光参数的变化。[结果]甘蔗叶片水势和相对含水量与土壤相对含水量存在一定的内在联系,耐旱强的品种对土壤水分的利用率较高;相关分析和因子分析表明苗期干旱存活率、Fv/Fm、叶片水势和相对含水量可被用作抗旱性评价指标。[结论]水势表现为一个相对独立的影响因子,对甘蔗抗旱性有支配作用,并验证了Fv/Fm作为甘蔗抗旱评价指标的可靠性。

关 键 词：Sugarcane    Drought stress    Leaf water    Leaf relative water content    Fv/Fm 

分 类 号：S566.1[农业科学—作物学]