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Discoloration and Fluorescence in Cotton Fiber Caused by Pseudomonas sp.. S. M. McCarter, Assistant Professor, Department of Plant Pathology and Plant Genetics, University of Georgia, Athens 30601; Phytopathology 62:940-942. DOI: 10.1094/Phyto-62-940.

A species of Pseudomonas, isolated from cotton bolls in Georgia, caused a green to yellow fluorescent discoloration in cotton fiber. Injury was necessary for entry of the bacterium into bolls. Optimum temperature for in vitro growth of the bacterium and pigment production in fiber was 30 C. The pigment was soluble in water, and its intensity of fluorescence decreased with field exposure.