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In recent years, with the continuous expansion of the area of ??the promotion and cultivation of genetically modified soybeans, while the enormous social and economic benefits that may be caused by some of the negative effects has attracted the attention of scientists around the world. Prior to commercial production of genetically modified soybeans into the environmental risk assessment is necessary. Soil microorganisms is an important constituent of the soil, the safety evaluation of genetically modified soybeans on soil microbial communities is an important element in the safety evaluation of genetically modified soybeans. Drought-resistant soybean Dongnong turn DREB3 gene 50 and receptor soybean Dongnong 50 microbial safety evaluation. Take the pot experiment, normal moisture management and drought stress conditions studied drought-resistant soybean of revolution DREB3 genes of soil bacteria, actinomycetes, fungi number two of the soil of beneficial bacteria Trichoderma and Azotobacter and two species of pathogenic microorganisms sickle bacteria and Phytophthora fungal carry out the separation and identification, and indoor pure culture conditions to study the different concentrations of transgenic drought-resistant soybean and non-genetically modified soybean root secretions Trichoderma, since students nitrogen-fixing bacteria, Fusarium and Phytophthora mildew root rot pathogens colony growth. The results are as follows: 1, under normal moisture management conditions, turn DREB3 gene drought-resistant soybean rhizosphere soil bacterial counts significantly reduced only in the VE period. R1, R4 and R8 turn DREB3 gene drought-resistant soybean rhizosphere soil bacterial quantity receptor soybean was no significant difference. Transgenic drought-resistant soybean and receptor soybean under drought stress, compared to the number of bacteria in the VE, R1, R4 and R8 period no significant difference. Drought stress compared with normal moisture management, the number of bacteria in the receptor soybean rhizosphere soil drought stress significantly reduced compared to R1 and normal moisture management. 2, under normal moisture management conditions, turn DREB3 gene Drought soybeans than receptor soybean rhizosphere soil actinomyces significantly lower in the VE period, after the return to normal state. Turn DREB3 gene drought-resistant soybean and receptor soybean rhizosphere soil actinomycete under drought stress compared the difference was not significant. Drought stress compared with normal water management under drought stress in turn modified soybean rhizosphere soil actinomyces increased significantly compared to the the VE period with normal water management. 3, under normal moisture management conditions, VE, R1, R4 and R8 of turn DREB3 gene drought-resistant soybean rhizosphere soil fungi number of receptor soybean difference is not significant. Under drought stress, VE, R1, R4 and R8 period, turn DREB3 gene drought-resistant soybean rhizosphere soil fungi number of differences compared to the receptor soybean significantly. Drought stress compared with normal water management under drought stress in turn the number of genetically modified soybean rhizosphere soil fungi R8 period compared with normal moisture management significantly reduced the number of receptor soybean rhizosphere soil fungi the R8 and normal moisture management also significantly reduced. : Drought stress is caused by drought-resistant soybean of turn DREB3 gene R8 rhizosphere soil significantly reduce the number of fungi important reason. 4, under conditions of normal moisture management, VE, R1, R4 and R8 of turn DREB3 gene drought-resistant soybean rhizosphere soil wood mold counts receptor soybean difference is not significant. Under drought stress, VE, R1, R4 and R8 period, turn DREB3 gene drought-resistant soybean rhizosphere Soil Trichoderma in the number of receptors soybeans compared the difference was not significant. Drought stress compared with normal water management under drought stress in transgenic soybeans and receptor soybean rhizosphere soil Trichoderma number of VE, R1, R4 and R8 period than normal moisture management differences were not significant. The normal moisture management conditions, VE, R1, R4 and R8 of to turn DREB3 gene Drought Soybean Rhizosphere Azotobacter quantity receptor soybean difference was not significant. Under Drought Stress, VE, R1, R4 and R8 of to turn DREB3 gene Drought soybean rhizosphere soil the number of azotobacter receptor soybean difference is not significant. The number of drought stress compared with normal water management under drought stress in transgenic soybeans and receptor soybean rhizosphere soil azotobacter VE, R1, R4 and R8 period compared with the normal water management differences were not significant. 6, under normal moisture management conditions, drought-resistant soybean to turn DREB3 genes than the number of receptor soybean rhizosphere soil Fusarium significant increase in R1 period. Under drought stress, turn DREB3 gene drought-resistant soybean than R1 period significantly increased the number of receptor soybean rhizosphere soil Fusarium. Number of drought stress compared with normal water management under drought stress in transgenic soybeans and receptor soybean rhizosphere soil Fusarium VE, R1, R4 and R8 period compared with normal moisture management differences were not significant. 7, the same concentration had no significant effect on the growth of Phytophthora, Fusarium, Trichoderma and Azotobacter transferred gene drought-resistant soybean and receptor soybean root exudates. Different concentrations of root exudates blank comparison, in addition to the the transgenic root exudates added at a concentration of 0.01 ‰ significantly increased in the control of Phytophthora diameter than the blank, the root exudates blank of the remaining concentration of photographic comparison of Phytophthora Fusarium, Trichoderma, Azotobacter colonies diameter of the differences were not significant.
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