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MY01通过降解草甘膦诱导铜(II)和锌(II)的磷酸盐沉淀:性能、途径及相关可能基因

MY01 induces phosphate precipitation of Cu(II) and Zn(II) by degrading glyphosate: performance, pathway and possible genes involved.

作者信息

Zhao Shengchen, Xu Zitong, Wang Jihong

机构信息

College of Resource and Environmental Science, Jilin Agricultural University, Changchun, Jilin, China.

Key Laboratory of Straw Biology and Utilization, Ministry of Education, Jilin Agricultural University, Changchun, Jilin, China.

出版信息

Front Microbiol. 2024 Oct 23;15:1479902. doi: 10.3389/fmicb.2024.1479902. eCollection 2024.

Abstract

Microbial bioremediation is an advanced technique for removing herbicides and heavy metals from agricultural soil. In this study, the strain MY01 was used for its ability to degrade glyphosate, a phosphorus-containing organic compound, producing PO as a byproduct. PO is known to form stable precipitates with heavy metals, indicating that strain MY01 could potentially remove heavy metals by degrading glyphosate. Therefore, the present experiment induced phosphate precipitation from Cu(II) (Hereinafter referred to as Cu) and Zn(II) (Hereinafter referred to as Zn) by degrading glyphosate with strain MY01. Meanwhile, the whole genome of strain MY01 was mined for its glyphosate degradation mechanism and its heavy metal removal mechanism. The results of the study showed that the strain degraded glyphosate best at 34°C, pH = 7.7, and an inoculum of 0.7%, reaching 72.98% within 3d. The highest removal of Cu and Zn in the test was 75.95 and 68.54%, respectively. A comparison of strain MY01's genome with glyphosate degradation genes showed that protein sequences GE000474 and GE002603 had strong similarity to glyphosate oxidoreductase and C-P lyase. This suggests that these sequences may be key to the strain's ability to degrade glyphosate. The GE001435 sequence appears to be related to the phosphate pathway, which could enable phosphate excretion into the environment, where it forms stable coordination complexes with heavy metals.

摘要

微生物修复是一种从农业土壤中去除除草剂和重金属的先进技术。在本研究中,菌株MY01因其降解草甘膦(一种含磷有机化合物)的能力而被使用,降解过程中会产生副产物PO 。已知PO 能与重金属形成稳定的沉淀物,这表明菌株MY01可能通过降解草甘膦来去除重金属。因此,本实验通过用菌株MY01降解草甘膦来诱导铜(II)(以下简称Cu)和锌(II)(以下简称Zn)的磷酸盐沉淀。同时,对菌株MY01的全基因组进行挖掘,以探究其草甘膦降解机制和重金属去除机制。研究结果表明,该菌株在34°C、pH = 7.7、接种量为0.7%时对草甘膦的降解效果最佳,3天内降解率达到72.98%。试验中对Cu和Zn的最高去除率分别为75.95%和68.54%。将菌株MY01的基因组与草甘膦降解基因进行比较发现,蛋白质序列GE000474和GE002603与草甘膦氧化还原酶和C-P裂解酶具有高度相似性。这表明这些序列可能是该菌株降解草甘膦能力的关键。GE001435序列似乎与磷酸盐途径有关,该途径可使磷酸盐排泄到环境中,在那里它与重金属形成稳定的配位络合物。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5a98/11538021/268f61579071/fmicb-15-1479902-g001.jpg

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