The role of organic acids on microbial deterioration in the Radix pseudostellariae rhizosphere under continuous monoculture regimes

Abstract A three-year field monoculture trial of Radix pseudostellariae and complementary laboratory studies were conducted to further elucidate the underlying mechanism responsible for significant decreases in the biomass yield and quality of R. pseudostellariae under continuous monoculture regimes...

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Autores principales:	Hongmiao Wu, Linkun Wu, Quan Zhu, Juanying Wang, Xianjin Qin, Jiahui Xu, Lufei Kong, Jun Chen, Sheng Lin, Muhammad Umar Khan, Hira Amjad, Wenxiong Lin
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8c0b54fc9482468ab841770f17d687a9
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spelling	oai:doaj.org-article:8c0b54fc9482468ab841770f17d687a92021-12-02T15:06:00ZThe role of organic acids on microbial deterioration in the Radix pseudostellariae rhizosphere under continuous monoculture regimes10.1038/s41598-017-03793-82045-2322https://doaj.org/article/8c0b54fc9482468ab841770f17d687a92017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-03793-8https://doaj.org/toc/2045-2322Abstract A three-year field monoculture trial of Radix pseudostellariae and complementary laboratory studies were conducted to further elucidate the underlying mechanism responsible for significant decreases in the biomass yield and quality of R. pseudostellariae under continuous monoculture regimes. HPLC analysis indicated that continuous monoculture soil was rich in organic acids, which had cumulative effects over time. Further analysis suggested that the application of a mixture of organic acids significantly promoted growth of pathogenic fungi, and increased the expression of chemotaxis-related gene (cheA) and biofilm formation of the specific pathogenic Kosakonia sacchari. However, opposite reactions were observed in the case of Bacillus megaterium and Bacillus pumilus. Concurrently, the present results revealed that the mixed organic acids stimulated the production of toxins, as well as H2O2 in the pathogenic fungi. Furthermore, the presence of organic acids reflecting environmental conditions under monocropping had negative effects on the expression of the biocontrol-related genes, which resulted in attenuated antagonistic activities of plant growth-promoting rhizobacteria (PGPR) to suppress mycelial growth of the pathogenic fungi. These results help to unveil the mechanisms associated with how accumulated organic acids differentially mediate deterioration of soil microbial composition and structure in monocropping system.Hongmiao WuLinkun WuQuan ZhuJuanying WangXianjin QinJiahui XuLufei KongJun ChenSheng LinMuhammad Umar KhanHira AmjadWenxiong LinNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-13 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hongmiao Wu Linkun Wu Quan Zhu Juanying Wang Xianjin Qin Jiahui Xu Lufei Kong Jun Chen Sheng Lin Muhammad Umar Khan Hira Amjad Wenxiong Lin The role of organic acids on microbial deterioration in the Radix pseudostellariae rhizosphere under continuous monoculture regimes
description	Abstract A three-year field monoculture trial of Radix pseudostellariae and complementary laboratory studies were conducted to further elucidate the underlying mechanism responsible for significant decreases in the biomass yield and quality of R. pseudostellariae under continuous monoculture regimes. HPLC analysis indicated that continuous monoculture soil was rich in organic acids, which had cumulative effects over time. Further analysis suggested that the application of a mixture of organic acids significantly promoted growth of pathogenic fungi, and increased the expression of chemotaxis-related gene (cheA) and biofilm formation of the specific pathogenic Kosakonia sacchari. However, opposite reactions were observed in the case of Bacillus megaterium and Bacillus pumilus. Concurrently, the present results revealed that the mixed organic acids stimulated the production of toxins, as well as H2O2 in the pathogenic fungi. Furthermore, the presence of organic acids reflecting environmental conditions under monocropping had negative effects on the expression of the biocontrol-related genes, which resulted in attenuated antagonistic activities of plant growth-promoting rhizobacteria (PGPR) to suppress mycelial growth of the pathogenic fungi. These results help to unveil the mechanisms associated with how accumulated organic acids differentially mediate deterioration of soil microbial composition and structure in monocropping system.
format	article
author	Hongmiao Wu Linkun Wu Quan Zhu Juanying Wang Xianjin Qin Jiahui Xu Lufei Kong Jun Chen Sheng Lin Muhammad Umar Khan Hira Amjad Wenxiong Lin
author_facet	Hongmiao Wu Linkun Wu Quan Zhu Juanying Wang Xianjin Qin Jiahui Xu Lufei Kong Jun Chen Sheng Lin Muhammad Umar Khan Hira Amjad Wenxiong Lin
author_sort	Hongmiao Wu
title	The role of organic acids on microbial deterioration in the Radix pseudostellariae rhizosphere under continuous monoculture regimes
title_short	The role of organic acids on microbial deterioration in the Radix pseudostellariae rhizosphere under continuous monoculture regimes
title_full	The role of organic acids on microbial deterioration in the Radix pseudostellariae rhizosphere under continuous monoculture regimes
title_fullStr	The role of organic acids on microbial deterioration in the Radix pseudostellariae rhizosphere under continuous monoculture regimes
title_full_unstemmed	The role of organic acids on microbial deterioration in the Radix pseudostellariae rhizosphere under continuous monoculture regimes
title_sort	role of organic acids on microbial deterioration in the radix pseudostellariae rhizosphere under continuous monoculture regimes
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/8c0b54fc9482468ab841770f17d687a9
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The role of organic acids on microbial deterioration in the Radix pseudostellariae rhizosphere under continuous monoculture regimes

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