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Isolation and characterization of plant growth-promoting endophytic bacteriaBacillus stratosphericusLW-03 fromLilium wardii

文献类型： 外文期刊

作者： Khan, Mohammad Sayyar 1 ; Gao, Junlian 1 ; Zhang, Mingfang 1 ; Chen, Xuqing 1 ; Moe, The Su 1 ; Du, Yunpeng 1 ; Yang, 1 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Beijing Agrobiotechnol Res Ctr, Beijing 100097, Peoples R China

2.Univ Agr, Genom & Bioinformat Div, Inst Biotechnol & Genet Engn, Peshawar 25000, Pakistan

3.Minist Educ, Mandalay Div, Dept Biotechnol Res, Pharmaceut Res Lab, Kyaukse 05151, Myanmar

关键词： Bacillus; Endophytic bacteria; Lilium wardii; Antifungal activity; Bioactive metabolites; Plant growth promotion

期刊名称：3 BIOTECH （ 影响因子：2.406； 五年影响因子：3.203 ）

ISSN： 2190-572X

年卷期： 2020 年 10 卷 7 期

页码：

收录情况： SCI

摘要： In the present study, a new strain ofBacillus stratosphericusLW-03 was isolated from the bulbs ofLilium wardii.The isolated endophytic strain LW-03 exhibited excellent antifungal activity against common plant pathogens, such asFusarium oxysporum, Botryosphaeria dothidea,Botrytis cinerea,andFusarium fujikuroi. The growth inhibition percentage ofBotryosphaeria dothideawas 74.56 +/- 2.35%, which was the highest, followed byBotrytis cinerea,Fusarium fujikuroi, andFusarium oxysporumwere 71.91 +/- 2.87%, 69.54 +/- 2.73%, and 65.13 +/- 1.91%, respectively. The ethyl acetate fraction revealed a number of bioactive compounds and several of which were putatively identified as antimicrobial agents, such as 4-hydroxy-2-nonenylquinolineN-oxide, sphingosine ceramides like cer(d18:0/16:0(2OH)), cer(d18:0/16:0), and cer(d18:1/0:0), di-peptides, tri-peptide, cyclopeptides [cyclo(D-Trp-L-Pro)], [cyclo (Pro-Phe)], dehydroabietylamine, oxazepam, 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine like compound (PC(0:0/20:4), phosphatidylethanolamine (PE(18:1/0:0)), 3-Hydroxyoctadecanoic acid, 7.alpha.,27-Dihydroxycholesterol,N-Acetyl-d-mannosamine, p-Hydroxyphenyllactic acid, Phytomonic acid, and 2-undecenyl-quinoloin-4 (1H). The LW-03 strain exhibits multiple plant growth-promoting traits, including the production of organic acids, ACC deaminase, indole-3-acetic acid (IAA), siderophores, and nitrogen fixation activity. The beneficial effects of the endophytic strain LW-03 on the growth of two lily varieties were further evaluated under greenhouse conditions. Our results revealed plant growth-promoting activity in inoculated plants relative to non-inoculated control plants. The broad-spectrum antifungal activity and multiple plant growth-promoting properties ofBacillus stratosphericusLW-03 make it an important player in the development of biological fertilizers and sustainable agricultural biological control strategies.

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