Growth Regulators Delay Foliar Chlorosis of Easter Lily Leaves

in Journal of the American Society for Horticultural Science
Author: Susan S. Han1
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  • 1 Department of Plant and Soil Sciences, French Hall, University of Massachusetts, Amherst, MA 01003

Leaf yellowing of excised Easter lily leaves was significantly delayed by application of gibberellic acids ≥250 mg·liter-1 or benzyladenine ≥50 mg·liter-1. Rapid development of foliar chlorosis following cold storage was delayed significantly by applying 500 mg·liter-1 of GA3 or BA before storage. Poststorage treatments were less effective. Development of chlorosis was associated with rapid loss of fresh weight and was not related to the aperture of the stomates (diffusive resistance). Respiration rates of leaves treated with growth regulators were significantly lower than those of the controls.'

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