Community Structures and Antifungal Activity of Root-Associated Endophytic Actinobacteria of Healthy and Diseased Soybean

doi:10.3390/microorganisms7080243

	Community Structures and Antifungal Activity of Root-Associated Endophytic Actinobacteria of Healthy and Diseased Soybean
	Liu, Chongxi 1,2; Zhuang, Xiaoxin 1; Yu, Zhiyin 1,2; Wang, Zhiyan 2; Wang, Yongjiang 2; Guo, Xiaowei 1,2; Xiang, Wensheng 1,3; Huang, Shengxiong2
通讯作者	Xiang, Wensheng(xiangwensheng@neau.edu.cn) ; Huang, Shengxiong(sxhuang@mail.kib.ac.cn)
	2019-08-01
发表期刊	MICROORGANISMS
卷号	7 期号:8 页码:15
摘要	The present study was conducted to examine the influence of a pathogen Sclerotinia sclerotiorum (Lib.) de Bary on the actinobacterial community associated with the soybean roots. A total of 70 endophytic actinobacteria were isolated from the surface-sterilized roots of either healthy or diseased soybeans, and they were distributed under 14 genera. Some rare genera, including Rhodococcus, Kribbella, Glycomyces, Saccharothrix, Streptosporangium and Cellulosimicrobium, were endemic to the diseased samples, and the actinobacterial community was more diverse in the diseased samples compared with that in the heathy samples. Culture-independent analysis of root-associated actinobacterial community using the high-throughput sequencing approach also showed similar results. Four Streptomyces strains that were significantly abundant in the diseased samples exhibited strong antagonistic activity with the inhibition percentage of 54.1-87.6%. A bioactivity-guided approach was then employed to isolate and determine the chemical identity of antifungal constituents derived from the four strains. One new maremycin analogue, together with eight known compounds, were detected. All compounds showed significantly antifungal activity against S. sclerotiorum with the 50% inhibition (EC50) values of 49.14-0.21 mg/L. The higher actinobacterial diversity and more antifungal strains associated with roots of diseased plants indicate a possible role of the root-associated actinobacteria in natural defense against phytopathogens. Furthermore, these results also suggest that the root of diseased plant may be a potential reservoir of actinobacteria producing new agroactive compounds.
关键词	Sclerotinia sclerotiorum (Lib ) de Bary diseased soybean root antifungal activity actinobacterial community new agroactive compounds
DOI	10.3390/microorganisms7080243
收录类别	SCI
语种	英语
WOS记录号	WOS:000482956300042
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/68610
专题	植物化学与西部植物资源持续利用国家重点实验室
通讯作者	Xiang, Wensheng; Huang, Shengxiong
作者单位	1.Northeast Agr Univ, Heilongjiang Prov Key Lab Agr Microbiol, Harbin 150030, Heilongjiang, Peoples R China 2.Chinese Acad Sci, Kunming Inst Bot, State Key Lab Phytochem & Plant Resources West Ch, Kunming 650201, Yunnan, Peoples R China 3.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100193, Peoples R China
推荐引用方式 GB/T 7714	Liu, Chongxi,Zhuang, Xiaoxin,Yu, Zhiyin,et al. Community Structures and Antifungal Activity of Root-Associated Endophytic Actinobacteria of Healthy and Diseased Soybean[J]. MICROORGANISMS,2019,7(8):15.
APA	Liu, Chongxi.,Zhuang, Xiaoxin.,Yu, Zhiyin.,Wang, Zhiyan.,Wang, Yongjiang.,...&Huang, Shengxiong.(2019).Community Structures and Antifungal Activity of Root-Associated Endophytic Actinobacteria of Healthy and Diseased Soybean.MICROORGANISMS,7(8),15.
MLA	Liu, Chongxi,et al."Community Structures and Antifungal Activity of Root-Associated Endophytic Actinobacteria of Healthy and Diseased Soybean".MICROORGANISMS 7.8(2019):15.

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