文献类型：期刊文献

英文题名：Genome sequencing of biocontrol strain Bacillus amyloliquefaciens Bam1 and further analysis of its heavy metal resistance mechanism

作者：Luo, Yuanchan[1];Chen, Lei[2];Lu, Zhibo[1];Zhang, Weijian[1];Liu, Wentong[1];Chen, Yuwei[1];Wang, Xinran[1];Du, Wei[3];Luo, Jinyan[2];Wu, Hui[1,4,5,6]

机构：[1]East China Univ Sci & Technol, Sch Biotechnol, Dept Appl Biol, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Shanghai Extens & Serv Ctr Agr Technol, Dept Plant Quarantine, Shanghai 201103, Peoples R China;[3]Agr Technol Extens Stn Ningxia, West Shanghai Rd, Yinchuan 750001, Ningxia, Peoples R China;[4]East China Univ Sci & Technol, Sch Biotechnol, State Key Lab Bioreactor Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[5]Shanghai Collaborat Innovat Ctr Biomfg Technol, 130 Meilong Rd, Shanghai 200237, Peoples R China;[6]China Natl Light Ind Council, Key Lab Biobased Mat Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2022

卷号：9

期号：1

外文期刊名：BIORESOURCES AND BIOPROCESSING

收录：;EI(收录号：20224513081464);WOS:【SCI-EXPANDED(收录号:WOS:000826481600002)】；

基金：This work was supported by Shanghai Agriculture Applied Technology Development Program of China (Grant No. 2021-02-08-00-12-F00771); Key Research and Development Program of Ningxia Hui Autonomous Region of China (Grant No. 2020BBF03004); the Fundamental Research Funds for the Central Universities (22221818014); the 111 Project (B18022); Open Funding Project of the State Key Laboratory of Bioreactor Engineering.

语种：英文

外文关键词：Bacillus amyloliquefaciens; Heavy metal resistance mechanism; Comparative genomic analysis; Resistance to essential heavy metals; Resistance to non-essential heavy metals

摘要：Plant growth-promoting rhizobacteria (PGPR) or Biocontrol strains inevitably encounter heavy metal excess stress during the product's processing and application. Bacillus amyloliquefaciens Bam1 was a potential biocontrol strain with strong heavy metal resistant ability. To understand its heavy metal resistance mechanism, the complete genome of Bam1 had been sequenced, and the comparative genomic analysis of Bam1 and FZB42, an industrialized PGPR and biocontrol strain with relatively lower heavy metal tolerance, was conducted. The comparative genomic analysis of Bam1 and the other nine B. amyloliquefaciens strains as well as one Bacillus velezensis (genetically and physiologically very close to B. amyloliquefaciens) was also performed. Our results showed that the complete genome size of Bam1 was 3.95 Mb, 4219 coding sequences were predicted, and it possessed the highest number of unique genes among the eleven analyzed strains. Nine genes related to heavy metal resistance were detected within the twelve DNA islands of Bam1, while only two of them were detected within the seventeen DNA islands of FZB42. When compared with B. amyloliquefaciens type strain DSM7, Bam1 lacked contig L, whereas FZB42 lacked contig D and I, as well as just possessed contig B with a very small size. Our results could also deduce that Bam1 promoted its essential heavy metal resistance mainly by decreasing the import and increasing the export of heavy metals with the corresponding homeostasis systems, which are regulated by different metalloregulators. While Bam1 promoted its non-essential heavy metal resistance mainly by the activation of some specific or non-specific exporters responding to different heavy metals. The variation of the genes related to heavy metal resistance and the other differences of the genomes, including the different number and arrangement of contigs, as well as the number of the heavy metal resistant genes in Prophages and Genomic islands, led to the significant different resistance of Bam1 and FZB42 to heavy metals.