高温胁迫对杜仲幼苗部分生理指标的影响  

Effects of High Temperature Stress on Physiological Indexes of Eucommia ulmoides Seedlings

作　　者：杨雨华[1] 宗建伟[2] 王健胜[3] 刘沛松[3] 杨风岭[3] 

机构地区：[1]平顶山学院低山丘陵区生态修复重点实验室,平顶山467000 [2]中国林业科学研究院 [3]平顶山学院

出　　处：《东北林业大学学报》2015年第3期14-17,共4页Journal of Northeast Forestry University

基　　金：河南省教育厅自然科学基础研究计划项目(12B180026);平顶山市科研资助项目(2012C015);平顶山学院高层次人才科研启动经费资助项目(2011010/G);林业公益性行业科研专项(201004044)

摘　　要：以3个杜仲无性系为材料,分别进行高温处理10 d,观察杜仲脯氨酸和丙二醛的质量分数、超氧化物歧化酶和过氧化物酶活性及光合参数的变化。结果表明:高温胁迫使杜仲幼苗叶片中的脯氨酸质量分数提高;杜仲幼苗在高温胁迫下,丙二醛的质量分数呈增加趋势,但不同无性系之间有较大差异,对照处理的丙二醛的质量分数远低于高温胁迫;不同无性系在不同温度处理下,超氧化物歧化酶活性变化差异较大,对照处理的3个无性系超氧化物歧化酶活性均大于高温处理;高温胁迫下,3个无性系叶片过氧化物酶活性呈下降趋势;高温胁迫使杜仲幼苗净光合速率、气孔导度下降;不同温度处理使杜仲幼苗胞间CO2的摩尔分数产生不同程度的增大;高温条件下各无性系的蒸腾速率大幅上升。In order to study the changes of osmotic substances,protective enzyme systems and photosynthetic parameters of Eucommia ulmoides seedling under high temperature stress,and provide physiological basis for screening of fine varieties of Eucommia ulmoides,we observed the changes of proline（Pro） content and malondialdehyde（MDA） content,superoxide dismutase（SOD） activity and peroxidase（POD） activity,and photosynthetic parameters of three clones after high temperature and low temperature processing 10 days,respectively.Pro content of leaves of Eucommia ulmoides seedling could be improved under high temperature stress.MDA content of Eucommia ulmoides seedling showed an increased trend under high temperature stress,however,different clones had large difference,and MDA content under low temperature were far lower than that under high temperature.SOD activity were quite different under different temperature treatment with a steady growth higher trend in low temperature.POD activities of three clones were reduced under high temperature.Net photosynthetic rate and stomata conductance were reduced under high temperature.Intercellular CO2 concentration of Eucommia ulmoides seedling were increased to different degrees under temperature treatments.Transpiration rate were increased substantially under high temperatures.

关 键 词：杜仲 生理指标 高温胁迫 

分 类 号：S792.99[农业科学—林木遗传育种]