水分胁迫对4种苗木叶绿素荧光的光化学淬灭和非光化学淬灭的影响

编号 zgly0000329424

文献类型 期刊论文

文献题名 水分胁迫对4种苗木叶绿素荧光的光化学淬灭和非光化学淬灭的影响

学科分类 220.1070;森林植物学

作者 史胜青  袁玉欣  杨敏生  梁海永  张金香 

作者单位 河北农业大学林学院 

母体文献 林业科学 

年卷期 2004,40(1)

页码 168-173

年份 2004 

分类号 S718.43 

关键词 水分胁迫  苗木  叶绿素荧光  光化学淬灭  非光化学淬灭 

文摘内容 The changes of photochemical quenching(qp) and non-photochemical quenching(qN) of chlorophyll a fluorescence in leaves of four tree seedlings ( Gleditsia sinensis, Juglans regia, Diospyros kaki and Diospyros lotus ) were different between two different water stress ways:detached drought treatment and potted drought treatment. After 4 hours dehydration by leaf detaching,the qp values had significant decrease except J. regia, only 6 hours later, the qp values compared with contrast decreased significantly in four tree seedlings(P>0.05), but the range of reduction( G.sinensis, J.regia and D.lotus) was just 2.5% to 6.4%. D.kaki, however,got to 31.3%. While the qN values increased significantly with conducting dehydration of the detached leaves. However, the qp values of four species showed no significant decrease when they were growing in pots under soil water stress(40%～60% RWC) for 30 days; and the qN values decreased obviously with a exception in J. regia, which was consistent with that of detached leaf treatment. The results suggested that some difference or changes in mechanism of excess light energy dissipation might perform in four seedlings by short-term and long-term water stress。