PEG模拟干旱胁迫条件下光叶珙桐幼苗叶片叶绿素含量变化  

Chlorophyll Changes in Seedling Leaves of Davidia involucrata var. vilmoriniana under PEG Simulated Drought Stress

作　　者：王磊[1] 汤家鑫 高兴国[1] 代勋[1] 李浪 张梅[1] 汤焰[1] 潘红 裴文仙 窦诗云 WANG Lei;TANG Jia-xin;GAO Xin-guo(Zhaotong College,Zhaotong,Yunnan 657000;Mangagement Bureau of Yudong Reservoir,Zhaotong,Yunnan 657000)

机构地区：[1]昭通学院,云南昭通657000 [2]昭通渔洞水库管理局,云南昭通657000

出　　处：《安徽农业科学》2018年第32期91-92,95,共3页Journal of Anhui Agricultural Sciences

基　　金：云南省教育厅项目(ZD2015018)

摘　　要：[目的]研究PEG模拟干旱胁迫条件下光叶珙桐幼苗叶片叶绿素含量。[方法]以2年生光叶珙桐幼苗为材料进行干旱胁迫模拟盆栽试验,设置5个胁迫梯度:CK、5%PEG、10%PEG、15%PEG、20%PEG,研究干旱胁迫0、24、48 h对光叶珙桐叶片叶绿素含量的影响。[结果]不同干旱胁迫程度对光叶珙桐叶绿素a的影响大于对叶绿素b的影响,叶绿素总量在中度胁迫时呈先上升后下降趋势,叶绿素a/b总体较低,反映了光叶珙桐幼苗喜阴的特点。[结论]该研究可为更好地利用和开发光叶珙桐资源提供基础。[Objective]To study the chlorophyll changes in seedling leaves of Davidia involucrata under PEG simulated drought stress.[Method]5 stress gradients CK,5%,10%,15%,20%PEG,0,24 and 48 h were set up in the experiment of drought stress simulated potted D.involucrata seedlings to analyze the change of chlorophyll content in leaves.[Result]The effect on chlorophyll a was greater than that of chlorophyll b,the total chlorophyll increased first and then decreased.The chlorophyll a/b was generally low,which reflects the plant’s preference for dark and moist environment.[Conclusion]The study can provide a basis for better utilization and development of D.involucrata resources.

关 键 词：光叶珙桐 PEG 干旱胁迫 叶绿素 抗旱性 

分 类 号：S718.4[农业科学—林学] Q945.78[生物学—植物学]