Negative Effects of Oxytetracycline on Wheat (Triticum aestivum L.) Growth, Root Activity, Photosynthesis, and Chlorophyll Contents
文献类型: 外文期刊
第一作者: Li Zhao-jun
作者: Li Zhao-jun;Xie Xiao-yu;Zhang Shu-qing;Liang Yong-chao
作者机构:
关键词: OTC;wheat;growth;root morphological characteristics;chlorophyll contents;photosynthesis
期刊名称:AGRICULTURAL SCIENCES IN CHINA ( 影响因子:0.82; 五年影响因子:0.997 )
ISSN: 1671-2927
年卷期: 2011 年 10 卷 10 期
页码:
收录情况: SCI
摘要: A solution culture experiment was performed to investigate the effects of oxytetracycline (OTC) on wheat (Triticum aestivum L.) growth, chlorophyll contents, and photosynthesis at five levels of 0, 10, 20, 40, and 80 mmol L(-1) OTC. OTC is toxic to wheat. The wheat growth, especially wheat root was significantly decreased. Further OTC also significantly decreased root activity, chlorophyll contents, and photosynthetic parameters except for intercellular CO(2) concentrations. The different responses of indicators such as root number, root activity and so on to OTC were also observed. The IC(50) values for the tested indicators to OTC ranged from 7.1 to 113.4 mmol L(-1) OTC. The order of indicator sensitivity to OTC was root number > stomatal conductance > chlorophyll a > total chlorophyll > photosynthetic rates > total surface area > transpiration rate > chlorophyll b > fresh weight of root > dry weight of root > total length > dry weight of shoot = fresh weight of shoot > total volume. The root number was more sensitive than other indicators with the IC(50) value of 7.1 mmol L(-1) OTC, and could be taken as the sensitive indicator to predict the hazards of OTC to wheat.
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