干旱胁迫与抗蒸腾剂对喜树几项生理指标及喜树碱含量的影响  

The effects of drought stress and anti-transpiration agent treatment on some physiological indexes of Camptotheca acuminata and its camptothecin content

作　　者：冯建灿[1] 张玉洁 张秋娟 李淑玲[1] 胡湛 

机构地区：[1]河南农业大学林学园艺学院,河南郑州450002 [2]河南省林业技术推广站,河南郑州450008 [3]河南省林业科学研究所,河南郑州45000 [4]焦作市园林局,河南焦作454150

出　　处：《河南农业大学学报》2002年第2期138-142,154,共6页Journal of Henan Agricultural University

基　　金：国家林业局科技攻关项目 (99-3 4-1)

摘　　要：经过 12d的干旱胁迫 ,喜树叶内Fpro和MDA含量分别升高了 4 6 .7%和 19.0 6 % ,是同期对照的 138.93%的 117% ;Pn降为负值 ;Tr和Sc显著下降 ,降低幅度分别为 5 8.2 8%和 75 % ;且随着胁迫时间的延长 ,变化幅度逐步增大 .抗蒸腾剂可有效地缓解胁迫对喜树的不良影响 .短期干旱胁迫可使叶内喜树碱的含量明显提高 。After 12 days drought stress,the content of free proline(Fpro) and malondialdehyde(MDA) in the leaves of Camptotheca acuminata Dene seedlings incresed by 46.7% and 19.06% respectively that was 138.93% and 117% of that of the check at the same time.Meanwhile net photosynthesis rate(Pn) decreased below zero.Transpiration rate(Tr) and stomatic conductance(Sc) decreased by 58.28% and 75%;the longer the plant was under stressing,the greater the difference from the control was.Anti transpiration agent could effectively resist the differences;short time drought stress could heighten the content of camptothecin(CPT).This could be an effective way to get more CPT in production.

关 键 词：干旱胁迫 抗蒸腾剂 喜树 生理指标 喜树碱含量 

分 类 号：Q949.761.8[生物学—植物学] Q946.88