Biochar amendment has been extensively used to improve soil quality, improve plant performance and suppress disease in monoculture system, however less studies focused on the underlying mechanisms of the replanting di...
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Biochar amendment has been extensively used to improve soil quality, improve plant performance and suppress disease in monoculture system, however less studies focused on the underlying mechanisms of the replanting disease control. We assessed the effects of applied biochar on Radix pseudostellariae plant growth, rhizosphere soil microbial communities, and the physiological properties of microorganism in consecutively monoculture system. We found biochar addition had little impact on plant physiological parameters, but biochar significantly mediated microbial abundances in the rhizosphere soil of differently consecutive monoculture years, especially decreased the abundances of pathogenic Fusarium oxysporum, Talaromyces helicus and Kosakonia sacchari. Furthermore, biochar amendment has negative effects on the growth of beneficial bacteria, such as Burkholderia ambifaria, Pseudomonas chlororaphis and Bacillus pumilus. Analysis based on the metabolites and metabolome indicated that biochar significantly affect the metabolism process of F. oxysporum, and then inhibit the mycelium growth and abate the virulence on plants. This study explains the mechanisms behind the biochar effect by changing the abundances and metabolism of rhizosphere bacteria and fungi, decreasing the contents of pathogens, and hence improving the environmental conditions for plants growth.
The root exudates of Radix pseudostellariae,working as a chemical language between plants and microbes,can deteriorate the microbial community in the rhizosphere in a consecutive monoculture *** assessed the effects o...
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The root exudates of Radix pseudostellariae,working as a chemical language between plants and microbes,can deteriorate the microbial community in the rhizosphere in a consecutive monoculture *** assessed the effects of artificially applied *** root exudates on *** seedling growth,rhizosphere soil microbial communities,and soil physicochemical *** found the effect of phenolic acids and organic acids acted as a driver of changes to the microbial *** throughput sequencing and qRT-PCR analysis demonstrated that the treatment of phenolic acids significantly decreased the relative abundance of Trichoderma,Penicillium,Pseudomonadales,Xanthomonadales,and *** organic acids had a significant negative effect on the relative abundance of Pseudomonadales and Streptomycetales,which led to significantly increased abundance of Fusarium,Xanthomonadales,Micrococcales,and Gemmatim *** based on the non-invasive micro-test techniqueindicated that the root exudates increased the H+ efflux and plasma membrane H+-ATPase activity in the pathogenic fungi and decreased them in the beneficial *** created an acidic environment for the inhibition of beneficial bacteria and accumulation of specialized plant *** study explains the mechanisms behind microflora shift and structure disorder caused by root exudates in a continuously *** rhizosphere soil through chemical language.
Biochar amendment has been extensively used to improve soil quality,improve plant performance and suppress disease in monoculture system,however less studies focused on the underlying mechanisms of the replanting dise...
详细信息
Biochar amendment has been extensively used to improve soil quality,improve plant performance and suppress disease in monoculture system,however less studies focused on the underlying mechanisms of the replanting disease *** assessed the effects of applied biochar on Radix pseudostellariae plant growth,rhizosphere soil microbial communities,and the physiological properties of microorganism in consecutively monoculture *** found biochar addition had little impact on plant physiological parameters,but biochar significantly mediated microbial abundances in the rhizosphere soil of differently consecutive monoculture years,especially decreased the abundances of pathogenic Fusarium oxysporum,Talaromyces helicus and Kosakonia ***,biochar amendment has negative effects on the growth of beneficial bacteria,such as Burkholderia ambifaria,Pseudomonas chlororaphis and Bacillus *** based on the metabolites and metabolome indicated that biochar significantly affect the metabolism process of ***,and then inhibit the mycelium growth and abate the virulence on *** study explains the mechanisms behind the biochar effect by changing the abundances and metabolism of rhizosphere bacteria and fungi,decreasing the contents of pathogens,and hence improving the environmental conditions for plants growth.
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