chlorophyll-b and coronatine

Toxins are secondary metabolites produced by several plant pathogenic microorganisms. These toxins play a major role in the development of disease symptoms. Coronatine, the non specific toxin, was extracted and purified from the culture medium of Pseudomonas syringae pv. glycinea. In this study, the effect of coronatine on the development of the chlorotic lesion on the Phaseolus vulgaris L. leaves, indicates that coronatine induced chlorosis on treated leaves as well as or untreated leaves on the same plant. An other effect of this toxin is the reduction of amount of both chlorophyll a and b. These results, provide that the development of chlorotic lesion is a primarily mode of action of coronatine.

Topics: Amino Acids; Chlorophyll; Chlorophyll A; Indenes; Phaseolus; Plant Leaves; Pseudomonas