Effects of atrazine on the physiology, sexual reproduction, and metabolism of eelgrass (Zostera marina L.)
文献类型： 外文期刊
第一作者： Gao, Yaping
作者： Gao, Yaping;Fang, Jianguang;Wang, Xiaoqin;Du, Meirong;Fang, Jinghui;Lin, Fan;Jiang, Weiwei;Jiang, Zengjie;Gao, Yaping;Fang, Jianguang;Wang, Xiaoqin;Du, Meirong;Fang, Jinghui;Lin, Fan;Jiang, Weiwei;Jiang, Zengjie;Li, Wenhao;Li, Fengxue
作者机构：
关键词： Atrazine; Zostera marina L.; Chlorophyll fluorescence; Sexual reproduction; Metabolomic profiling; Carbon and nitrogen metabolism
期刊名称：AQUATIC BOTANY （ 影响因子：2.473； 五年影响因子：2.417 ）
ISSN： 0304-3770
年卷期： 2019 年 153 卷
页码：
收录情况： SCI
摘要： Photosystem II (PSII) herbicides are widely used and commonly detected in coastal environments and seagrass beds are often exposed to these herbicides. While acute inhibition of seagrass photosynthesis by PSII herbicides has been shown, there are few reports on the potential impacts of herbicide exposures on sexual reproduction and on metabolism. Seagrass Zostera marina L., which were in the process of sexual reproduction, were exposed to elevated atrazine concentrations (1, 3 and 10 mu g l(-1)) for 30 days. Results showed that atrazine significantly inhibited photosynthetic efficiency (Delta F/F'm and Fv/Fm) and significant reduced levels of sugars in shoots. The decreased sugars and C:N ratio implied the long term atrazine exposure (10 mu g l(-1)) decreased energy supply and changed carbon and nitrogen metabolism. Atrazine induced increases in gamma-aminobutyric acid (GABA) and 1-aminocyclopropane carboxylic acid (ACC). GABA may be involved in C and N metabolism and in combination with ACC to participate in more complicated signal transduction processes. The effects of atrazine on eelgrass energy reserves and metabolism may lead to inhibition on plant growth. Though no significant decreased sexual reproduction effort was found, there may be potential effect of herbicide on eelgrass shoots, especially rhizome function of energy storage and thus on energy investment in flowering.
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