Pseudomonas phaseolicola

Yarwood and hfiddleton reported the first protective effects in 1954. Little more was done until about 1968. Protection of plants from ozone has been shown in several instances rust infection of wheat Botrytis cinerea on broad bean Pseudomonas phaseolicola on pinto bean mosaic virus on tobacco three tobacco viruses (R. A. Reinert, personal communication) and mosaic virus on bean. In the latter two cases, protection was reported without visible symptoms of the virus. This may be a general phenomenon, inasmuch as some protection was reported with very mild symptoms by Brennan and Leone. This protective action has generally been ascribed to the production of a... 

Studies with simulated acidic rain found growth of the bacterial plant pathogen Pseudomonas phaseolicola totally inhibited by a solution of pH 3.2.When these solutions were used for inoculation of Phaseolus vulgaris Red Kidney test plants, no infection or disease development was observed. Control plants inoculated with solutions at pH 5.6 developed normal disease patterns. Additional studies with other host-parasite pairs are summarized in Table II. 

These alterations are also mimicked by the chlorosis-inducing Pseudomonas phaseolicola toxin (Zeller et al., 1977). Accumulating unesterihed fatty acids have also been noted to react with xanothophylls and various alcohols (Grob and Csupor, 1967) in senescing leaves of Acer plantanoides. The increase in unesterified fatty acids parallels the breakdown of chlorophyll in a number of senescent conditions (J. Ding and J. L. Harwood, unpublished results). 

Bacitracin A and valinomycin are involved in the transport of Mn + and K+, respectively (E 2.2). Tabtoxin and Pseudomonas phaseolicola toxin are bacterial phy to toxins (E 5.4). They contain groupings seldom found in natural products (/3-lactame groups, phosphosulfamine groups). 

L-Glutamic acid derivatives Phaseotoxin (D 17) Formed in Pseudomonas phaseolicola, causing the halo blight disease of beans... 

Some plant pathogenic bacteria and their phytotoxins have been screened in bioassays that monitor the effects of their toxins (antibiotic and phytotoxic) on other sensitive bacteria. For example, several fluorescent Pseudomonas syringae pvs. produce extracellular phytotoxins.76,106,116 Tabtoxin is produced by P. syringae pv. tabaci and pv. coronafacines, and this natural product inhibits glutamine synthetase.34,46,116 Phaseolotoxin, produced by P. syringae pv. phaseolicola... 

Croft K.P.C., Jiittner F. and Slusarenko A.J. (1993) Volatile products of the lipoxygenase pathway evolved from Phaseolus vulgaris (L.) leaves inoculated with Pseudomonas syringue pv. phaseolicola. Plant Physiol., 101, 13-24. 

Phaseolotoxin (17), a tripeptide, has been isolated from cultures of Pseudomonas syringae pv. phaseolicola. This toxin and related compounds which co-occur with it, irreversibly inhibit ornithine carbamoyltransferase and produce chlorosis in the host (Ballio, 1981). 

Arai T, Kino K (2008) A Novel L-Amino Acid Ligase is Encoded by a Gene in the Phaseolotoxin Biosynthetic Gene Cluster from Pseudomonas syringae pv. phaseolicola 1448A. Biosci. biotech, biochem. 72 p. 3048-50. 

Incompatible strains of Pseudomonas pisi appear to be immobilised in tobacco leaf tissue by adherence and this is followed by engulfment by cuticle-like material secreted by plant cells. The compatible tobacco pathogen P. tobaci does not produce such a response. Similarly the saprophytic bacterium P. putida adheres to and becomes enveloped by cells in the bean leaf, while a compatible pathogen P. phaseolicola shows no response. Actual physical contact between the bacterium and plant cell walls is required for the hypersensitive response in pepper plants induced by X, vesicatoria. 

K. P.C. Croft, C.R. Voisey and A.J. Slusarenko, Mechanism of hypersensitive cell collapse correlation of increased lipoxygenase activity with membrane damage in leaves of Phaseolus vulgaris (L.) inoculated with an avirulent race of Pseudomonas syringae pv. phaseolicola. Physiol. Mol. Plant Pathol., 36 (1990) 49-62. 

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