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首页> 外文期刊>Research in Microbiology >Functional characterization of a novel hydrocarbonoclastic Pseudomonas sp. strain PUP6 with plant-growth-promoting traits and antifungal potential.
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Functional characterization of a novel hydrocarbonoclastic Pseudomonas sp. strain PUP6 with plant-growth-promoting traits and antifungal potential.

机译：一种新型的碳氢化合物假单胞菌属的功能表征。具有促进植物生长特性和抗真菌潜力的PUP6菌株。

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摘要

A novel hydrocarbonoclastic bacterium was isolated from rice rhizospheric soil using an enrichment culture technique. Detailed taxonomic studies identified the organism, designated strain PUP6, as a member of the genus Pseudomonas. The bacterium grew in minimal medium amended with n-alkane members of hydrocarbons, n-dodecane (C12H26), n-hexadecane (C16H34), n-octadecane (C18H38), n-octacosane (C28H58); and petroleum fractions such as crude oil and lubricating oil when provided as sole carbon and energy source. Degradation of these n-alkane hydrocarbons and oils in minimal salts medium by strain PUP6 was estimated using gas chromatography with a flame ionization detector. In addition to its hydrocarbonoclastic properties, this bacterium exhibits a broad spectrum of fungal antibiosis against various phytopathogenic fungi. An antifungal metabolite produced by strain PUP6 was isolated, characterized and identified as phenazine-1-carboxamide on the basis of nuclear magnetic resonance and mass spectroscopic analyses. Strain PUP6 also produced plant-growth-promoting siderophores, indoleacetic acid (IAA), phosphate solubilizing enzymes, and fungal cell wall degrading enzymes such as protease and chitinase. This study can be considered as the first report on n-alkane hydrocarbon and oil degradation by a rhizosphere soil bacterium that exhibits biofertilizing and biocontrol traits. Due to its innate multiple functional traits beyond its role in degradation of hydrocarbons, strain PUP6 may be used as plant-growth-promoting rhizobacterium and biocontrol agent against phytopathogenic fungi.
机译：使用富集培养技术从水稻根际土壤中分离出一种新型的碳氢碎屑细菌。详细的分类学研究确定了该生物，命名为PUP6菌株，是假单胞菌属的成员。细菌在基本培养基中生长，该培养基用烃的正构烷烃成员，正十二烷（C12H26），正十六烷（C16H34），正十八烷（C18H38），正十八烷（C28H58）修饰;用作唯一碳和能源的石油馏分，例如原油和润滑油。使用带有火焰离子化检测器的气相色谱法估算了菌株PUP6在最少量盐介质中对这些正构烷烃和油的降解。除了其碳氢碎裂特性外，该细菌还具有针对各种植物病原性真菌的广谱真菌抗菌作用。通过核磁共振和质谱分析，分离了由菌株PUP6产生的抗真菌代谢物，并将其鉴定为吩嗪-1-羧酰胺。 PUP6菌株还产生了促进植物生长的铁载体，吲哚乙酸（IAA），磷酸盐增溶酶和真菌细胞壁降解酶，例如蛋白酶和几丁质酶。这项研究可以被视为有关具有生物肥力和生物防治特性的根际土壤细菌对正构烷烃和油类降解的首次报道。由于其先天的多种功能性状，除了其在烃类降解中的作用外，菌株PUP6还可以用作促进植物生长的根瘤菌和抗植物病原真菌的生物防治剂。

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