Tissues of purple, green, and white varieties of eggplant, Solanum melongena, were analyzed for relative activity of phenyl phosphatase, fructose-1, 6-diphosphatase, glucose-1-phosphatase, glucose-6-phosphatase, and ATPase. Activities of all phosphatases were highest in the purple variety and lowest in the white. Relative rates of activity decreased in the order: ATPase, phenyl phosphatase, fructose-1, 6-diphosphatase, glucose-6-phosphatase, and glucose-1-phosphatase (only found in the purple variety).

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Author notes

1Virginia Polytechnic Institute and State University.

2Southern Regional Research Center.

3One of the facilities of the U.S. Department of Agriculture, Agricultural Research Service, Southern Region, New Orleans, LA.