2024年3月28日 星期四
几种绿藻对西草净的抗性与活性氧防御物质
Resistance of some green algaes to Simetryn and Preventing substances against toxicity of active oxygen
1994年 第3卷 第1期 页码[15-19]    下载全文[0.7MB]  
摘要

4种绿藻对除莠剂西草净(Simetryn)的反应有很大差异,小球藻、羊角月芽藻、衣藻和四鞭藻的EC50(影响浓度)值分别为700、25、27和11μg/L不同浓度西草净都能影响绿藻的光合作用,浓度为200ppm6时,羊角月牙藻和四鞭藻的光合抑制率分别为95.3%和94.0%,但对小球藻几乎无影响,当浓度增至2000ppm时,对小球藻的光合抑制率为87%。小球藻中活性氧防御物(SOD、AsA-POD、GR等)的活性均比衣藻、羊角月牙藻等高几倍到几十倍,显示小球藻对西草净的抗性和忍耐性可能与它细胞内所含的活性氧防御物活性有关,它们的高活性使小球藻在西草净污染后,对体内生成的活性氧(1、H2、O等)伤害有解毒作用。

Abstract

The results from the study indicated that the reactions of four green aglaes to Simetryn were different. The values of EC50 vary with different. The values of EC50 vary with  different kinds of algaes, varying with its kinds. When Selenastrum capricor nutum and Carteria sp. were put in Simetryn with a concentration of 1 hour, their inhibitory rates of photosynthesis were 95.3% and 94.0% respectively; but no influence was observed on Chlorela vulgaris. When concentration being to 2000 ppm, the inhibitory rate of photosynthesis of Chlorela rulgaris was 87%.The estimated results for preventing substances against the toxicity of active oxygen in some green algaes show that the activation of superoxide dismutase (SOD), ascorbate peroxidase (AsA-POD),and glutathine reductase (GR) in Chlorela rulgaris was several to dozens times higher than that in Chamydomonus sp.and Selenastrum, which suggests that the resistance and tolerance of Chlorela vulgaris against Simetryn may be associated with the activation of the detoxicating substances plays a role in getting rid of the harmful effects prduced by active oxygen in Chlorela rulgariscontaminated by Simetryn.

关键词绿藻; 除莠剂; 西草净; 超氧歧化酶; 抗坏血酸过氧化物酶; 谷胱甘肽;
Key wordsgreen algaes; herbicide; simetryn; AsA -POD; SOD; GR
作者卞咏梅,田中净,笠井文绘,菅原淳
所在单位江苏省中国科学院植物研究所, 南京 210014
日本国立环境研究所,筑波 305
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