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Changes in Bacterial Community Structure and Enriched Functional Bacteria Associated With Turfgrass Monoculture
Frontiers in Bioengineering and Biotechnology ( IF 5.7 ) Pub Date : 2021-01-15 , DOI: 10.3389/fbioe.2020.530067
Chang-Wook Jeon , Da-Ran Kim , Eun-Ji Bae , Youn-Sig Kwak

There is increasing attention being paid to utilizing microbial communities to improve plant health while reducing management inputs. Thus, the objectives of this research were to assess changes in the rhizosphere bacterial community structure associated with long-term turfgrass monoculture and to demonstrate the feasibility of using functional bacteria as beneficial biocontrol agents. Large patch disease, caused by the fungal pathogen Rhizoctonia solani AG2-2, is a significant threat to turfgrass cultivation. Rhizosphere samples were collected from 2-, 13- and 25-year turfgrass (Zoysia japonica) monocultures. The 13-year monoculture field had a higher pathogen population density than both the 2- and 25-year monoculture fields. Analyses of the rhizosphere bacterial communities revealed that Streptomyces was dominant in the 2-year field and Burkholderia was enriched in the 25-year field. Based on the culturable rhizosphere bacteria, Streptomyces neyagawaensis J6 and Burkholderia vietnamiensis J10 were obtained from the 2- and 25-year fields, respectively. Application of S. neyagawaensis J6 and B. vietnamiensis J10 led to excellent inhibition of large patch disease as well as enhanced tolerance against drought and temperature stresses. The results showed that the selected bacteria could be developed as biocontrol and abiotic stress tolerance agents for turfgrass cultivation.

中文翻译:

与草坪单一栽培相关的细菌群落结构和功能丰富的细菌的变化

人们越来越关注利用微生物群落来改善植物健康,同时减少管理投入。因此,本研究的目的是评估与长期单一栽培草坪草相关的根际细菌群落结构的变化,并证明使用功能性细菌作为有益生物防治剂的可行性。由真菌病原体Rhizoctonia solani AG2-2 引起的大斑块病是对草坪草种植的重大威胁。从 2 年、13 年和 25 年的草坪草(结缕草)单一栽培中收集根际样品。13 年单一栽培田的病原体种群密度高于 2 年和 25 年单一栽培田。对根际细菌群落的分析表明,链霉菌在 2 年田中占优势,伯克霍尔德菌在 25 年田中富集。基于可培养的根际细菌,分别从 2 年和 25 年的田间获得了 Streptomyces neyagawaensis J6 和 Burkholderia vietnamiensis J10。S. neyagawaensis J6 和 B. vietnamiensis J10 的应用导致对大斑块病害的极好抑制以及对干旱和温度胁迫的耐受性增强。结果表明,所选择的细菌可以开发为草坪栽培的生物防治和非生物胁迫耐受剂。分别。S. neyagawaensis J6 和 B. vietnamiensis J10 的应用导致对大斑块病害的极好抑制以及对干旱和温度胁迫的耐受性增强。结果表明,所选择的细菌可以开发为草坪栽培的生物防治和非生物胁迫耐受剂。分别。S. neyagawaensis J6 和 B. vietnamiensis J10 的应用导致对大斑块病害的极好抑制以及对干旱和温度胁迫的耐受性增强。结果表明,所选择的细菌可以开发为草坪栽培的生物防治和非生物胁迫耐受剂。
更新日期:2021-01-15
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