Shifts in herbicide tolerance in paddy field periphyton following herbicide application

被引：25

作者：

Kasai, F ^{[1
]}

机构：

[1] Natl Inst Environm Studies, Div Reg Environm, Tsukuba, Ibaraki 3050053, Japan

来源：

CHEMOSPHERE | 1999年 / 38卷 / 04期

关键词：

D O I：

10.1016/S0045-6535(98)00221-5

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Herbicide susceptibility was examined in various algal strains isolated from herbicide-treated and untreated paddy fields. Diatom strains showed obvious tolerance to the herbicides simetryn and pretilachlor irrespective of herbicide exposure, while the susceptibility of green algae mostly reflected their history of herbicide exposure. Cross-resistance was also induced in some algae. Rapid development of herbicide tolerance indicated that the tolerance seemed to be conferred by tolerant strains already present in the communities. Thus, changes in genetic composition within a population seem to be the main mechanism by which paddy periphyton gain herbicide tolerance. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：919 / 931

页数：13

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