The impact of the herbicide atrazine on growth and photosynthesis of seagrass, Zostera marina (L.), seedlings
文献类型: 外文期刊
作者: Gao, Yaping 1 ; Fang, Jianguang 1 ; Zhang, Jihong 1 ; Ren, Lihua 1 ; Mao, Yuze 1 ; Li, Bin 1 ; Zhang, Mingliang 1 ; Liu, 1 ;
作者机构: 1.Chinese Acad Fisheries Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China
关键词: Zostera marina;Atrazine;Seedling;Adult;Growth;Chlorophyll a fluorescence
期刊名称:MARINE POLLUTION BULLETIN ( 影响因子:5.553; 五年影响因子:5.907 )
ISSN: 0025-326X
年卷期: 2011 年 62 卷 8 期
页码:
收录情况: SCI
摘要: The impact of the widely used herbicide atrazine on seedling growth and photosynthesis of eelgrass was determined. The long-term impact of the herbicide atrazine (1, 10 and 100 mu g/L) on growth of eelgrass Zostera marina (L) seedlings, maintained in outdoor aquaria, was monitored over 4 weeks. Exposure to 10 mu g/L atrazine resulted in significantly lower plant fresh weight and total chlorophyll concentration and up to 86.67% mortality at the 100 mu g/L concentration. Short-term photosynthetic stress on eelgrass seedlings was determined and compared with adult eelgrass using chlorophyll fluorescence. The effective quantum yield in eelgrass seedlings was significantly depressed at all atrazine concentrations (2, 4, 8, 16, 32 and 64 mu g/L) even within 2 h and remained at a lower level than for adult plants for each concentration. These results indicate that atrazine presents a potential threat to seagrass seedling functioning and that the impact is much higher than for adult plants. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.
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