Selection of phytotoxin producing rhizobacteria

Anais da Academia Brasileira de Ciências

Daniel D.c. Carvalho²  Denilson F. Oliveira¹  Vicente P. Campos²  Moacir Pasqual¹ 

[1] ,Universidade Federal de Lavras Departamento de Fitopatologia Lavras MG ,Brasil

关键词: Bacillus;    Stenotrophomonas;    weeds;    lettuce;    wheat;    Bacillus;    Stenotrophomonas;    plantas daninhas;    alface;    trigo;   

DOI  :  10.1590/S0001-37652011005000009

来源: SciELO

【 摘 要 】

In order to select phytotoxin producing rhizobacteria to control weed plants, twenty five bacterial strains previously isolated from the rhizospheres of various plants were grown in a liquid medium and, after cell removal by centrifugation, the liquid phases were freeze-dried and the products were extracted with ethyl acetate/methanol. The extracts were concentrated to dryness under vacuum and dissolved in water and sucrose solution to be submitted to in vitro assays of lettuce (Lactuca sativa L.) seed germination and wheat (Triticum aestivum L.) coleoptile growth. Although most samples affected coleoptile growth, only those from four strains reduced lettuce seed germination. Two strains of Bacillus cereus, one strain of B. pumilus and one of Stenotrophoonas altophilia were the most promising microorganisms for producing phytotoxin and, consequently, for the development of new weed control products.

【 授权许可】

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