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陆生植物体内酶系统对UV-B辐射增强的响应

姚晓芹1,2;刘庆1   

  1. 1中国科学院成都生物所生态中心,成都 610041;2中国科学院研究生院,北京 100039
  • 收稿日期:2005-06-15 修回日期:2006-02-23 出版日期:2006-05-18 发布日期:2006-05-18

Responses of enzymes in terrestrial plants to enhanced UV-B radiation

YAO Xiaoqin1,2;LIU Qing1   

  1. 1Ecological Research Center,Chengdu Institute of Biology,Chinese Academy of Sciences,Chengdu 610041,China;2Ciraduate University of Chinese Academy of Sciences,Beijing 100039, China
  • Received:2005-06-15 Revised:2006-02-23 Online:2006-05-18 Published:2006-05-18

摘要: 臭氧层减薄导致地表中波紫外线UV-B(280~320 nm)辐射的增强,UV-B辐射能量远高于可见光,且能被植物体内蛋白质和核酸等生物大分子吸收.酶是植物体内起催化作用的一类蛋白质,酶的数量和活性对UV-B辐射增强有强烈的响应.本文将近年来增强UV-B辐射对植物体内酶影响的研究工作进行了综述.主要包括抗氧化酶、核酮糖-1,5-二磷酸羧化酶、硝酸还原酶和谷氨酰胺合成酶.并就今后该方面的研究提出建议.

关键词: 森林土壤种子库, 天然更新, 时空格局

Abstract: With the destruction of ozone layer,ultraviolet-B (UV-B,280~320nm) radiation has being enhanced at the earth’s surface.The energy of UV-B irradiation is far higher than that of visible light,which could be absorbed by biomacromolecules such as protein and nuclei acid.Enzyme is a sort of protein catalyzing the biochemical processes,and its content and activity in plant have strong responses to enhanced UV-B radiation.This paper summarized the research advances in the effects of enhanced UV-B radiation on the key enzymes,mainly including antioxidant enzymes,ribulose-1,5-diphosphoscarboxylase,nitrate reductase and glutamine synthetase in terrestrial plants. Some suggestions for future research in this field were put forward.

Key words: Forest soil seed bank, Natural regeneration, Temporal and spatial pattern