New lineage of filamentous, spore-forming, gram-positive bacteria from soil

Article Abstract:

A novel bacteria strain that was isolated from Italian soil and was designated [SOSP1-21.sup.T] forms branched mycelia in solid and liquid media and has a filamentous morphology similar to that of some genera belonging to the Actinobacteria. Phylogenetic analyses of 16S rRNA gene segments confirmed the relatedness of these strains to [SOSP1-21.sup.T] and indicated that the newly isolated strains form separate clades in a deeply branching lineage.

Peptidoglycans, Spores (Botany), Spores, Filamentous bacteria, Structure, Chemical properties

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Biosynthesis of auxin by the gram-positive phytopathogen Rhodococcus fascians is controlled by compounds specific to infected plant tissues

Article Abstract:

The production of auxin indole-3-acetic acid (IAA) and its main intermediates by the gram-positive phytopathogen Rhodococcus fascians is described. It is found that R. fascians produces IAA through the indole-3-pyruvic acid (IPyA) pathway and the importance of IAA production in relation to the capacity of R. fascians to colonize plant tissues and/or to induce symptoms is discussed.

All Other Basic Organic Chemical Manufacturing, Industrial organic chemicals, not elsewhere classified, Acetic Acid, Auxin, Auxins

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The phytopathogen Dickeya dadantii (Erwinia chrysanthemi 3937) is a pathogen of the pea aphid

Article Abstract:

The pathogenicity of Dickeya dadantii is tested on the pea aphid Acyrthosiphon pisum, to demonstrate that it is highly virulent for the insect either by septic injury or by oral infection. The pathogenic trait for aphids is shown to be widespread, albeit variable, within the phytopathogenes, with no link to phylogenetic positioning in the Enterobacteriaceae.

Bacterial diseases of plants, Bacterial plant diseases, Pea aphid

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