文献类型：期刊文献

中文题名：水分胁迫对板栗幼苗叶片活性氧代谢的影响

英文题名：Effect of Soil Water Stress on Active Oxygen Metabolism of Chestnut Seedling Leaves

作者：时忠杰[1] 杜阿朋[2] 胡哲森[3] 徐大平[1]

机构：[1]中国林业科学研究院热带林业研究所;[2]中国林业科学研究院森林生态环境与保护研究所;[3]福建农林大学林学院

年份：2007

卷号：20

期号：5

起止页码：683-687

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：科技部社会公益研究专项"华南主要外来树种人工林生态环境影响的研究(2003DIB3J116)"

语种：中文

中文关键词：水分胁迫;板栗幼苗;活性氧化谢

外文关键词：water stress; chestnut seedling; active oxygen metabolism

分类号：S718.43

摘要：采用盆栽控水试验测定了板栗幼苗叶片的生理生化指标,结果表明:在土壤水分胁迫下,随胁迫强度的增加,板栗叶片相对含水量和可溶性蛋白含量呈逐渐减小趋势;总叶绿素、叶绿素a、叶绿素b及类胡萝卜素含量呈下降趋势,但下降幅度不同;活性氧保护酶SOD、POD、CAT随胁迫程度的增强呈先降后增再降低的变化趋势,而ASP基本呈降低的变化趋势;O2-.产生速率呈先增再降后增加的变化趋势,而H2O2含量呈先增后降的变化趋势,其中中度胁迫时含量最大;MDA含量与质膜相对透性均随胁迫程度的增强而增大;SOD、CAT、ASP等保护酶可以作为板栗幼苗抗旱力强弱的评价指标。
Some indexes, such as the active oxygen protective system and some free radicles, were measured by the controlling the water in container seedlings. The results indicated that the total relative water contents and the protein contents dropped with the increase of stress intensity and the contents of total chlorophyll, chlorophyll a, chloro- phyll b and carotinoid had a descending trend. The activities of the SOD, POD and CAT descended firstly, then as- cended and descended lastly and the activity of ASP had a descending trend. The free radicles showed different changing trend： the O2 producing rates increased firstly, and then decreased and increased lately with the water stress intensity, but the H202 contents raised firstly and then decreased. Both MDA content and membrane relative permeability had an ascending trend with the increasing stress. The activity of the enzymes such as SOD, CAT and ASP may evaluate the drought-resistant of the chestnut seedlings as indexes.