Characterization of Bacteria That Suppress Rhizoctonia Damping-Off in Bark Compost Media by Analysis of Fatty Acid Biomarkers
作者： A. Tunlid , H. A. J. Hoitink , C. Low , D. C. White
DOI: 10.1128/AEM.55.6.1368-1374.1989
关键词:
摘要: Examination of cucumber roots (Cucumis sativus L.) grown in bark compost media and the surrounding edaphic substrate showed profiles polar lipid fatty acids commonly found bacteria. The composition these differed significantly between a medium naturally suppressive to Rhizoctonia damping-off from conducive medium. Cucumber had higher proportions cis-vaccenic acid (18:1 ω 7c) iso-branched monoenoic i17:1 8 but lower several iso- anteiso-branched compared with concentrations bacterial were media. However, growth substrates differences similar those proper. These results suggest major community systems. Fatty analyses also utilized examine effects on root colonization by Flavobacterium balustinum 299, biocontrol agent. concentration most prominent this bacterium, 8, was increased produced inoculated seeds rendered treatment. This change concomitant significant increase 18:1 7c, not present lipids antagonist, indicating shift microflora community.
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