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The effect of native and ACC deaminase-containing Azospirillum brasilense Cd1843 on the rooting of carnation cuttings

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Carnation cuttings treated with non-transformed and 1-aminocyclopropane (ACC) deaminase-containing Azospirillum brasilense Cd1843 produced significantly more roots than untreated controls and fewer roots than cuttings treated with 0.1% indolebutyric acid (IBA). The roots produced by cuttings treated with ACC deaminase-containing Azospirillum brasilense Cd1843 were the longest roots resulting from any of the treatments, followed by non-transformed Azospirillum brasilense Cd1843, 0.1% IBA, and treatment with water. The results are interpreted in terms of a previously proposed model of bacterial promotion of plant growth by ACC deaminase and indoleacetic acid, and may have implications for the use of plant growth-promoting bacteria in the flower industry.Key words: ACC deaminase, carnation, cuttings, rooting, Azospirillum brasilense.

Des boutures d'oeillets traitées avec Azospirillum brasiliense Cd1843 non transformé ou contenant la 1-aminocyclopropane (ACC) désaminase ont produit une quantité de racines significativement supérieure de racines que le témoin non traité et moins de racines que les boutures traitées avec 0,1% d'acide indolebutyrique (AIB). Les racines produites par les boutures traitées avec Azospirillum brasilense Cd1843 contenant l'ACC désaminase étaient les plus longues parmi celles obtenues suite à quelconque traitement, suivies par Azospirillum brasiliense Cd1843 non transformés, 0,1 % d'AIB et un traitement avec de l'eau. Ces résultats sont interprétés sur la base d'un modèle préalablement proposé s'appuyant sur la stimulation de la croissance végétale par l'ACC désaminase et l'acide indoleacétique et pourraient avoir des implications dans l'utilisation de bactéries favorisant la croissance des plantes dans l'industrie florale.Mots clés : ACC désaminase, oeillets, boutures, enracinement, Azospirillum brasilense.[Traduit par la Rédaction]

Document Type: Research Article

Publication date: June 1, 2005

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  • Published since 1954, this monthly journal contains new research in the field of microbiology including applied microbiology and biotechnology; microbial structure and function; fungi and other eucaryotic protists; infection and immunity; microbial ecology; physiology, metabolism and enzymology; and virology, genetics, and molecular biology. It also publishes review articles and notes on an occasional basis, contributed by recognized scientists worldwide.
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