Impact of a sulfonylureic herbicide on growth of photosynthetic and non-photosynthetic protozoa.
Impact of a sulfonylureic herbicide on growth of photosynthetic and non-photosynthetic protozoa.
复制标题
磺酰脲类除草剂对光合和非光合原生动物生长的影响。
DOI：
10.1007/3-540-26531-7_45
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
H. Hosoya
中科院分区：
文献类型：
--
作者：
T. Kawano;T. Kosaka;H. Hosoya
我们研究了磺酰脲类除草剂对水生微生物生长的影响，包括光合和非光合原生动物，以及前共生和非共生自由生活藻类。这种除草剂旨在阻止植物中支链氨基酸的生物合成。将含有 3-[[(4-甲氧基-6-甲基-1,3,5-三嗪-2-基)氨基甲酰]-氨磺酰]-2-噻吩甲酸甲酯的市售磺酰脲类除草剂添加到草履虫、P. caudatum、P. bursaria（绿色草履虫）和眼虫（一种从绿藻中分离出来的前共生藻类）的培养物中。草履虫和自由生活的小球藻，浓度范围为 0.01 至 1 000 mg l−1。添加除草剂1周后，在显微镜下检查原生动物和藻类的活力。高浓度的除草剂（100–300 mg l−1）被证明会抑制共生藻类和自由生活小球藻的生长。相同范围的除草剂浓度对于绿色草履虫和其他非光合作用草履虫来说处于致死水平。该除草剂对眼虫没有显示出致死作用。相反，眼虫的生长明显增强。此外，除草剂处理导致眼虫细胞的大小和形状发生显着变化，严重影响眼虫运动。最后我们得出结论，磺酰脲类除草剂可能对水环境并非无害。
We studied the impact of a sulfonylurea-based herbicide on the growth of aquatic microbes including photosynthetic and non-photosynthetic protozoa, and ex-symbiotic and non-symbiotic free living algae. This herbicide is designed to block the biosynthesis of branched amino acids in plants. A commercial sulfonylurea-based herbicide containing methyl 3-[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)carbamoyl]-sulfamoyl]-2-thiophenecarboxylate was added to the culture ofParamecium trichium, P. caudatum, P. bursaria(green paramecia), andEuglena gracilis, an ex-symbiotic algae isolated from green paramecia and free-livingChlorella, at various concentrations ranging from 0.01 to 1 000 mg l−1. The viability of protozoa and algae was examined under microscopy, 1 week after addition of the herbicide. High concentrations of herbicide (100–300 mg l−1) were shown to be inhibitory to the growth of symbiotic algae and free livingChlorella. The same range of herbicide concentrations was shown to be at lethal level for green paramecia and other non-photosynthetic paramecia. The herbicide showed no lethal effect inEuglena gracilis. Instead, the growth inEuglena graciliswas markedly enhanced. In addition, treatment with the herbicide resulted in marked changes in size and shape of theEuglenacells seriously affecting the euglenoid movement. Lastly we conclude that the sulfonylureic herbicides may not be harmless to aqueous environment.
Murata,T.：原生质体。
DOI：
--
发表时间：
--
期刊：
影响因子：
--
作者：
通讯作者：
--