Effects of selenium on microorganisms in the rhizosphere soil of oilseed rape

• Main Authors: CHENG Qin, HU Cheng-xiao, MING Jia-jia, CAI Miao-miao, LIU Kang, TANG Yan-ni, ZHAO Xiao-hu
• Format: Article
• Language: zho
• Published: Agro-Environmental Protection Institute, Ministry of Agriculture 2021-01-01
• Series: Journal of Agricultural Resources and Environment
• Subjects: selenium; oilseed rape; rhizosphere soil; microbial community; structure; diversity
• Online Access: http://www.aed.org.cn/nyzyyhjxb/html/2021/1/20210113.htm

Pot experiments were performed to investigate the effects of different concentrations(0, 0.5, and 1.0 mg·kg^-1)of exogenous selenium(Se)on the microbial community structure and diversity of rapeseed rhizosphere soil. The community structure analysis showed that the dominant bacteria in the rhizosphere of <i>Brassica napus</i> were Proteobacteria, Actinobacteria, Firmicutes, and Acidobacteria, and the dominant fungi were Ascomycota. The diversity analysis showed that exogenous Se did not significantly affect the diversity of the soil bacterial and fungal communities. The principal coordinate analysis showed that the Se treatments had a significant effect on the bacterial community structure, but not on the fungal community structure. Significant differences in the linear discriminant analysis(LDA)showed that <i>Microtrichales</i> was significantly enriched by the low Se concentration in the soil, and <i>Rhodanobacter, Nitrolancea</i>, Thermomicrobiaceae, and <i>Achromobacter</i> exhibited significant enrichment after treatment with the high concentration of Se in the soil. The results showed that Se treatments were beneficial for the enrichment of rhizosphere microorganisms in the soil of rapeseed, thus promoting plant growth and improving the ability of the plants to cope with adverse environment stress.