| 燕麦叶片衰老与活性氧代谢的关系 |
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| 引用本文： | 李伯林,梅慧生.燕麦叶片衰老与活性氧代谢的关系[J].植物生理与分子生物学学报,1989,15(1):6-12. |
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| 作者姓名： | 李伯林 梅慧生 |
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| 作者单位： | 北京大学生物系，北京大学生物系 北京 100871，北京 100871 |
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| 摘 要： | 燕麦连体叶片与高体叶片衰老中,过氧化氢酶和超氧物歧化酶(SOD)活性下降,脂类过氧化产物丙二醛(MDA)迅速积累,组织自动氧化速率显著加快。植物激素BA,GA_3,2,4—D及光、亚胺环己酮(CH),EDTA处理均不同程度地延缓离体叶片的衰老过程,同时抑制过氧化氢酶和SOD活性下降,阻止MDA的积累和组织自动氧化速率的提高.推测叶片衰老中活性氧起着重要的作用。
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| 关 键 词： | 衰老 活性氧 过氧化氢酶 超氧物歧化酶 脂类过氧化 组织自动氧化 |
Relationship between Oat Leaf Senescence and Activated Oxygen Metabolism |
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| LI Bai-Lin,MEI Hui-Sheng.Relationship between Oat Leaf Senescence and Activated Oxygen Metabolism[J].Journal Of Plant Physiology and Molecular Biology,1989,15(1):6-12. |
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| Authors: | LI Bai-Lin MEI Hui-Sheng |
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| Institution: | LI Bai-Lin,MEI Hui-Sheng Department of Biology. Peking University,Beijing 100871 |
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| Abstract: | During the senescence of attached and deta-
ched oat (Avena sativa) leaves, the activities of
catalase and superoxide dismutase (SOD) de-
creased, the lipid peroxidation increased and the
rate of tissue autoxidation, an indicator of the
protective mechanism of tissue, increased great-
ly, i.e. the ability to scavenge free radicals de-
creased significantly. Treatments of detached
oat leaves with phytohormones (BA, GA_3, 2,4-
D), light, cycloheximide and EDTA could Strong-
ly delay leaf senescence, inhibit the decrease
of enzyme activities and the increase of lipid
peroxidation. The rate of tissue autoxidation
was also inhibited. Thus, activated oxygen
may play an important role in leaf senescence. |
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| Keywords: | senescence activated oxygen catalase superoxide dismutase (SOD) lipid peroxidation tissue autoxidation |
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