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The discovery of pivotal fungus and major determinant factor shaping soil microbial community composition associated with rot root of American ginseng
Plant Signaling & Behavior ( IF 2.9 ) Pub Date : 2021-07-25 , DOI: 10.1080/15592324.2021.1952372
Lixia Tian 1 , Jiarong Ou 2 , Xiao Sun 1 , Yujing Miao 1 , Jin Pei 3 , Lei Zhao 4 , Linfang Huang 1
Affiliation  

ABSTRACT

American ginseng, a valuable medicinal and food plant, is threatened by rot root, which affects its yield and quality. However, limited studies have investigated the changes in soil microbial community and physiochemical properties between healthy and rot root American ginseng. Here, high-throughput sequencing and soil physiochemical properties were used to characterize these changes. The soil physiochemical properties showed significance differences between the soil of healthy and rot root, in which the pH, available potassium, available phosphorus, soil organic carbon and soil organic matter were significantly higher in healthy root soil. Besides, fungal α-diversity was also higher in healthy root soil than that in rot root. Importantly, the dominant fungal genera differed between soils of healthy and rot root of American ginseng, and LEfSe further indicated that six fungal genera (Devriesia, Chrysosporium, Dichotomopilus, Pseudeurotium, Acaulium and Scedosporium) were significantly enriched in the soil of healthy plants, whereas six fungal genera (Gibellulopsis, Fusarium, Plectosphaerella, Tetracladium, Gibberella and Ilyonectri) were significantly enriched in the soil of rot root, suggesting that an increase in the relative abundance of these pathogenic fungi (Fusarium, Plectosphaerella, and Ilyonectri) may be associated with ginseng rot root. Notably, this study is the first to report that an increase in the relative abundances of Gibellulopsis and Gibberella in the rot root soil of American ginseng may be associated with the onset of rot root symptoms in this plant. The functional profile prediction showed that the there was a significantly Pathotrophs increase in the rot root soil compared with healthy root soil and Saprotrophs were more abundant in the healthy root soil. Finally, correlation analyses revealed that soil cation exchange capacity was an important factors affecting the composition of rot root of American ginseng soil microbial communities. This study not only used a new approach to explore the new fungal associated with rot root in American ginseng but also excavated the major soil physiochemical properties affecting the microbiome diversity, providing foundation for developing biocontrol strategies against rot root.



中文翻译:

与西洋参腐烂根相关的关键真菌和影响土壤微生物群落组成的主要决定因素的发现

摘要

西洋参是一种珍贵的药用和食用植物,受到腐烂根系的威胁,影响其产量和品质。然而,有限的研究调查了健康和腐烂根西洋参之间土壤微生物群落和理化性质的变化。在这里,高通量测序和土壤理化特性被用来描述这些变化。土壤理化性质在健根土壤和腐根土壤中表现出显着性差异,其中健康根土壤的pH值、速效钾、速效磷、土壤有机碳和土壤有机质均显着升高。此外,健康根系土壤的真菌α多样性也高于腐烂根系。重要的是,西洋参健康和腐烂根的土壤之间的优势真菌属不同,Devriesia、Chrysosporium、Dichotompilus、Pseudeurotium、AcauliumScedosporium)在健康植物的土壤中显着富集,而 6 个真菌属(Gibellulopsis、Fusarium、Plectosphaerella、Tetracladium、GibberellaIlyonectri)在腐根土壤中显着富集,表明这些病原真菌(镰刀菌、PlectosphaerellaIlyonectri)的相对丰度增加可能与人参腐根有关。值得注意的是,这项研究首次报告了GibellulopsisGibberella的相对丰度增加在西洋参的腐烂根土中可能与该植物腐烂根系症状的发作有关。功能分布预测表明,与健康根土相比,腐烂根土中的病原菌显着增加,而健康根土中的腐生菌更为丰富。最后,相关分析表明,土壤阳离子交换能力是影响西洋参土壤微生物群落腐根组成的重要因素。本研究不仅以新的方法探索了与西洋参腐烂根相关的新真菌,而且挖掘了影响微生物群落多样性的主要土壤理化特性,为制定针对腐烂根的生物防治策略提供了基础。

更新日期:2021-07-25
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