High bioremediation potential of strain Chenggangzhangella methanolivorans CHL1 for soil polluted with metsulfuron-methy
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RESEARCH ARTICLE
High bioremediation potential of strain Chenggangzhangella methanolivorans CHL1 for soil polluted with metsulfuron-methyl or tribenuron-methyl in a pot experiment Ting-Ting Yang 1 & Hui-Wen Zhang 1 & Jian Wang 1,2 & Xin-Yu Li 1 & Xu Li 1
&
Zhen-Cheng Su 1
Received: 17 April 2020 / Accepted: 13 September 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Soil contamination caused by long-term application of metsulfuron-methyl and tribenuron-methyl has become an issue of increasing concern. In our previous study, strain Chenggangzhangella methanolivorans CHL1, capable of efficiently degrading sulfonylurea herbicides, was isolated. Here, the bioremediation potential of strain CHL1 was assessed for soil polluted with metsulfuron-methyl or tribenuron-methyl in a pot experiment. The growth parameters of waxy maize were measured on day 21 of the pot experiment. Additionally, the residues of metsulfuron-methyl and tribenuron-methyl in soils were analyzed, and the soil microbial community was investigated using a phospholipid fatty acids (PLFAs) method on days 1, 7, 14, and 21. The results indicated that strain CHL1 greatly accelerated the degradation of metsulfuron-methyl and tribenuron-methyl in soils. The degradation rates in the treatments inoculated with strain CHL1were all more than 91% after 7 days, significantly higher than the 25–36% degradation measured in non-inoculated treatments. Furthermore, strain CHL1 reduced the negative effects of tribenuron-methyl and metsulfuron-methyl on waxy maize growth, especially the primary root length. Moreover, inoculation with strain CHL1 also reduced the effects of tribenuron-methyl and metsulfuron-methyl on soil microbial biomass, diversity, and community structure. The present study demonstrates that strain CHL1 has great potential application to remediate soil contaminated with metsulfuron-methyl or tribenuron-methyl. Keywords Chenggangzhangella methanolivorans CHL1 . Metsulfuron-methyl . Tribenuron-methyl . Bioremediation . Maize
Introduction Weed management is a primary part of agricultural crop production (Bajwa et al. 2015; Chauhan 2012). Herbicides are the most common weed management tool and have been widely used all over the world (Zhou et al. 2020). However, the longterm and excessive application of herbicides usually result in soil contaminations (Silva et al. 2018), especially by Responsible Editor: Robert Duran * Xin-Yu Li [email protected] 1
Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
2
Shenyang Research Institute of Chemical Industry Co. Ltd., Shenyang 110021, China
herbicides that are very persistent in agricultural soils, which has a negative impact on soil quality, microbial communities, and plant growth (Boutin et al. 2010; Petcu et al. 2015; GarcíaDelgado et al. 2019). The effects of residue contamination on susceptible crops have caused crop rotation barriers (Mehdizadeh et al. 2016; Wang et al. 2012; Brown 2010)
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