Fusarium oxysporum strains as biocontrol agents against Fusarium wilt: effects on soil microbial biomass and activity

Pesquisa Agropecuária Brasileira

Raquel Ghini²  Monica Mezzalama¹  Roberto Ambrosoli¹  Elisabetta Barberis¹  Angelo Garibaldi¹  Sônia Maria De Stefano Piedade¹ 

[1] ,Embrapa Centro Nacional de Pesquisa de Monitoramento e Avaliação de Impacto Ambiental Jaguariúna SP ,Brazil

关键词: biological control;    soilborne pathogen;    risk assessment;    controle biológico;    patógeno de solo;    análise de risco;   

DOI  :  10.1590/S0100-204X2000000100012

来源: SciELO

【 摘 要 】

Before planning the large-scale use of nonpathogenic strains of Fusarium oxysporum as biocontrol agents of Fusarium wilt, their behaviour and potential impact on soil ecosystems should be carefully studied as part of risk assessment. The aim of this work was to evaluate the effects of antagonistic F. oxysporum strains, genetically manipulated (T26/6) or not (233/1), on soil microbial biomass and activity. The effects were evaluated, in North-western Italy, in two soils from different sites at Albenga, one natural and the other previously solarized, and in a third soil obtained from a 10-year-old poplar stand (Popolus sp.), near Carignano. There were no detectable effects on ATP, fluorescein diacetate hydrolysis, and biomass P that could be attributed to the introduction of the antagonists. A transient increase of carbon dioxide evolution and biomass C was observed in response to the added inoculum. Although the results showed only some transient alterations, further studies are required to evaluate effects on specific microorganism populations.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License