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Induction of oxalate decarboxylase by oxalate in a newly isolated Pandoraea sp. OXJ-11 and its ability to protect against Sclerotinia sclerotiorum infection

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Pandoraea sp. OXJ-11 has been shown to produce an oxalate decarboxylase. The enzyme could be induced by increasing the oxalate in the medium. An increasing concentration of yeast extract was able to stimulate the cell growth but could not increase the specific oxalate decarboxylase activity. The oxalate decarboxylase was produced maximally at 25–35°C and pH4.0–9.0, favoring its potential application in protection of host plants from oxalate-producing phytopathogens. The influence of glucose on the induction of oxalate decarboxylase by oxalate was examined, and it was found that glucose inhibited the production of the oxalate decarboxylase. Resistance results showed that Pandoraea sp. OXJ-11 was capable of suppressing Sclerotinia sclerotiorum infection on detached leaflets of Brassica napus plants.

Pandoraea sp. OXJ-11 produit une oxalate décarboxylase. L’enzyme pouvait être induite en augmentant la quantité d’oxalate du milieu. Des concentrations croissantes d’extraits de levure pouvaient stimuler la croissance cellulaire mais ne parvenaient pas à augmenter l’activité décarboxylase spécifique à l’oxalate. L’oxalate décarboxylase était produite de façon maximale à 25–35°C et à pH 4,0–9,0, ce qui plaide en faveur de son utilisation potentielle dans la protection d’une plante hôte contre des phytopathogènes produisant de l’oxalate. L’influence du glucose sur l’induction de l’oxalate décarboxylase par l’oxalate a été examinée et nous avons trouvé que le glucose inhibait la production d’oxalate décarboxylase. Les résultats de tests de résistance ont démontré que Pandoraea sp. OXJ-11 était capable de supprimer l’infection de feuilles détachées de plants de Brassica napus par Sclerotinia sclerotiorum.

Document Type: Research Article

Publication date: December 1, 2007

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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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