Pseudomonas phaseolicola toxin

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fatty acids parallels the breakdown of chlorophyll in a number of senescent conditions (J. Ding and J. L. Harwood, unpublished results).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). 

Pseudomonas phaseolicola toxin (D 23) 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... 

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). 

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