Carbendazim induces a temporary change in soil bacterial
community structure |
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Authors: | WANG Xiuguo SONG Min GAO Chunming DONG Bin ZHANG Qun FANG Hua and YU Yunlong |
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Institution: | Department of Plant Protection,College of Agriculture and Biotechnology,Zhejiang University,Hangzhou 310029,China |
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Abstract: | The effect of carbendazim applications on the diversity and structure of a soil bacterial community was studied under field conditions
using temperature gradient gel electrophoresis (TGGE) and partial sequence analysis of PCR-amplified 16S rRNA gene. After four
successive introductions of carbendazim at a level of 0.94 kg active ingredient (a.i.)/ha, the genetic diversity (expressed as Shannon
index, H0) decreased from 1.43 in the control to 1.29 in treated soil. This harmful e ect seems to increase with the concentration of
carbendazim. The value of H0 in the soil treated with carbendazim at 4.70 kg a.i./ha was reduced to 1.05 (P 6 0.05). The structure of
soil bacterial community was also a ected after four repeated applications of carbendazim at levels of 0.94, 1.88 and 4.70 kg a.i./ha, as
seen in the relative intensities of the individual band. However, the bacterial community in carbendazim-treated soil recovered to that
in the control 360 d after the first treatment. The results indicated that repeated applications of carbendazim could reduce soil microbial
diversity and alter the bacterial community structure temporarily. |
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Keywords: | carbendazim repeated applications bacterial diversity temperature gradient gelelectrophoresis phylogenetic analysis |
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