title: Characterization of five phyllosphere bacteria isolated from Rosa rugosa leaves, and their phenotypic and metabolic properties.
abstract: Five gram-negative bacteria, all of which were Enterobacteriaceae, were isolated from the phyllosphere of green or senescing leaves of Rosa rugosa, and their phenotypic and physiological characteristics were examined. Partial 16S rDNA sequences led to identification of these isolates as Pantoea agglomerans, Klebsiella terrigena, Erwinia rhapontici, and two strains of Rahnella aquatilis. Interestingly, these phyllosphere bacteria had certain phenotypic and physiological convergences, while they showed their own metabolic properties toward phenolic compounds of plant origin. In particular, the two Ra. aquatilis isolates from the green leaves had a substrate-inducible gallate decarboxylase activity in the resting cells that had been cultured in 1 mM gallic acid- or protocatechuic acid-containing medium. The other three isolates from the senescing leaves did not have this enzyme activity. Simple phenolics that the Ra. aquatilis decarboxylatively produced from benzoic acid derivatives had better antimicrobial activities than those of the substrates.
authors.affiliation: Division of Applied Bioscience, Graduate School of Agriculture, Hokkaido University, Kita-ku, Sapporo 060-8589, Japan. yasu-h@abs.agr.hokudai.ac.jp
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Hashidoko
authors.forename: Eriko
authors.initials: E
authors.lastname: Itoh
authors.forename: Kentaro
authors.initials: K
authors.lastname: Yokota
authors.forename: Tadashi
authors.initials: T
authors.lastname: Yoshida
authors.forename: Satoshi
authors.initials: S
authors.lastname: Tahara
mesh_terms: D000935:Antifungal Agents; D002262:Carboxy-Lyases / Q000378:metabolism; D002396:Catechols / Q000494:pharmacology; D004275:DNA, Ribosomal / Q000235:genetics; D003653:Decarboxylation; D004755:Enterobacteriaceae / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D005707:Gallic Acid / Q000378:metabolism; D062385:Hydroxybenzoates / Q000378:metabolism / Q000494:pharmacology; D010636:Phenols / Q000737:chemistry / Q000378:metabolism; D010641:Phenotype; D018515:Plant Leaves / Q000382:microbiology*; D012329:RNA, Bacterial / Q000235:genetics; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D020638:Rahnella / Q000201:enzymology; D027824:Rosaceae / Q000382:microbiology*
chemical_list: D000935:Antifungal Agents; D002396:Catechols; D004275:DNA, Ribosomal; D062385:Hydroxybenzoates; D010636:Phenols; D012329:RNA, Bacterial; D012336:RNA, Ribosomal, 16S; C009091:protocatechuic acid; D005707:Gallic Acid; D002262:Carboxy-Lyases; C034221:catechol