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 80 0 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 35 0～ 6 5 0 μmol·m- 2 s- 1
The effect of light in site fragmentation in Bei Mount in Zhejiang Province on physiological characteristics of Heptacodium miconioides was studied. Characteristics of leaves, photosynthesis, membrane lipid peroxidation and endogenous protective enzymes of H. miconioides were affected by light stress caused by fragmentation. The results indicated that in strong light (>800?μmol·m -2 s -1 ) caused by fragmentation, conductivity and content of malondialdehyde (MDA) of H. 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 350～650?μmol·m -2 s -1 .
出处
《林业科学》
EI
CAS
CSCD
北大核心
2003年第4期43-48,共6页
Scientia Silvae Sinicae
基金
浙江省自然科学基金赞助项目 ( 3 992 77)
