Enhanced degradation of fomesafen by a rhizobial strain Sinorhizobium sp. W16 in symbiotic association with soybean: Datasets and Supplementary Materials
Description
Associated publication: Chen, W., Gao, Y., Shi, G., Li, J., Fan, G., Yang, C., Wang, B., Tong, F., Li, Y. (2022) "Enhanced degradation of fomesafen by a rhizobial strain Sinorhizobium sp. W16 in symbiotic association with soybean." Fomesafen, a broad-spectrum herbicide with a long duration, is frequently applied in legume farmlands, causing severe damage to crop growth and the local environment. Rhizobia can develop key enzyme systems to degrade organic pollutants and form a symbiotic relationship with legumes to enhance the degradation of fomesafen. However, there are few relevant studies examining this phenomenon. In this study, a fomesafen-degrading rhizobium, Sinorhizobium sp. W16, was isolated from a soybean nodule for the first time. The metabolic study of fomesafen in its pure culture revealed a novel biodegradation pathway, which was initiated by cleavage of the S‒N bond, followed by dechlorination and cleavage of the ether bond. Strain W16 efficiently degraded fomesafen by 69% and 38% under fomesafen concentrations of 5 mg L-1 and 50 mg L-1 over 7 days, respectively. The pot experiment results demonstrated that strain W16 colonizes the soybean rhizosphere successfully and eliminates the inhibition of fomesafen on nitrogen fixation by stimulating the indigenous nitrogen-fixing microbes in the rhizosphere. These developed symbiotic relationships promote fomesafen degradation rates by 29.17%-57.87%. This study provides valuable information about a novel fomesafen-degrading rhizobium with great potential for promoting the bioremediation of herbicide-contaminated farmland soil due to the development of symbiotic systems with legumes. Contact information: Wei Chen, Jiangsu Academy of Agricultural Sciences, Nanjing, China, wchen@jaas.ac.cn Dates of data collection: 2019/06 - 2021/07