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林业科学 ›› 2003, Vol. 39 ›› Issue (4): 43-48.doi: 10.11707/j.1001-7488.20030407

• 论文及研究报告 • 上一篇    下一篇

在生境片断化中光对七子花生理特性的影响

刘鹏 徐根娣   

  1. 浙江师范大学生命与环境科学学院,金华321004
  • 收稿日期:2001-08-20 修回日期:1900-01-01 出版日期:2003-07-25 发布日期:2003-07-25

EFFECT OF LIGHT IN SITE FRAGMENTATION ON PHYSIOLOGICAL CHARACTERISTICS OF HEPTACODIUM MICONIOIDES

Liu Peng,Xu Gendi   

  1. College of Life and Environment Science , Zhejiang Normal University Jinhua321004
  • Received:2001-08-20 Revised:1900-01-01 Online:2003-07-25 Published:2003-07-25

摘要:

研究了浙江北山生境片断化对七子花生理特性的影响,重点研究生境片断化所引起的光胁迫对七子花叶片特征、光合速率及膜脂过氧化和体内一些保护酶类的影响。结果表明:在北山七子花生境片断化所导致的强光(大于800 μmol·m-2 s-1 )条件下,七子花光合速率降低,电导率和丙二醛含量显著增加,叶片的叶绿素a/b值上升,叶绿素含量、气孔导度、超氧化物歧化酶、过氧化氢酶、过氧化物酶和抗坏血酸过氧化物酶等保护酶活性下降。光照强度350~650 μmol·m-2 s-1 对七子花较为适宜

关键词: 七子花, 生境片断化, 光胁迫, 生理特性

Abstract:

The effect of light in site fragmentation in Bei Mount in Zhejiang Province on physiological characteristics ofHeptacodium miconioides was studied. Characteristics of leaves, photosynthesis, membrane lipid peroxidation and endogenous protective enzymes ofH. miconioides were affected by light stress caused by fragmentation. The results indicated that in strong light (>800μmol·m-2 s-1) caused by fragmentation, conductivity and content of malondialdehyde (MDA) ofH. miconioides leaves increased significantly, value of chlorophyll a/b increased, and content of chlorophyll, photosynthesis, stomatal conductance and activities of superoxide dismutase (SOD), catalase (CAT), peroxidase (POD) and ascorbate peroxidase (AP) decreased. The results suggested that H. Miconioides was applicable in 350~650μmol·m-2s-1.

Key words: Heptacodium miconioides, Site fragmentation, Light stress, Physiological characteristics