摘要
以10个杉木速生型无性系为材料,采用聚乙二醇(PEG)溶液培养法进行干旱胁迫模拟.测定结果表明:10个杉木无性系相对含水量和保水力呈先上升后下降趋势,且均低于对照;蒸腾速率均先急剧下降后不同程度上升,其中FS42蒸腾速率降幅最大,为52.18%;PSⅡ最大光化学效率Fv/Fm均持续降低,其中FS43降幅最小(为7.93%),FS38降幅最大(为18.40%).采用隶属函数法进行综合评价,结果表明10个杉木无性系的抗旱能力由大到小排列如下:FS43>FS41>FS39>FS40>FS37>FS35>FS42>FS36>FS34>FS38.
The drought-resistance evaluation of 10 accessions of Chinese fir clones was studied by simulated drought stress with-2.0 MPa PEG-6000 solution.The results indicated that under water stress the water content of leaf and leaf water-holding ability increased at first and then decreased,and lower than control group（P0.05）;transpiration rate decreased sharply at first and then increased respectively,with FS42 maximum reduction of 52.18%;the maximal photochemical efficiency of PSⅡ（Fv/Fm） of 10 clones continued to decrease,with FS43 minimum reduction of 7.93% and FS38 maximum reduction of 18.40%.Based on complehensive evaluation of drought resistance,with subordinative function method,the drought-resistance sequence of 10 accessions of Chinese fir clones from high to low was as follows：FS43FS41FS39FS40FS37FS35FS42FS36FS34FS38.
出处
《福建农林大学学报（自然科学版）》
CSCD
北大核心
2012年第5期491-496,共6页
Journal of Fujian Agriculture and Forestry University:Natural Science Edition
基金
福建省自然科学基金资助项目(2010J01063)
福建省科技厅重点资助项目(2010N0002)
关键词
杉木
无性系
干旱胁迫
隶属函数法
Chinese fir
clone
drought resistance
subordinative function method
