Seed Coat and Water Absorption Properties of Seed of Near-isogenic Snap Bean Lines Differing in Seed Coat Color1

in Journal of the American Society for Horticultural Science
J. E. WyattAgricultural Research Service, U. S. Department of Agriculture, U. S. Vegetable Laboratory, Charleston, SC29407

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Differences in water absorption by intact seeds and in osmotic properties of excised seed coats were measured in 4 near-isogenic breeding lines of snap bean, Phaseolus vulgaris L. White seeds absorbed water more rapidly than colored seeds. Excised white seed coats were more permeable to water than colored seed coats in response to an osmotic gradient. Seed coat thickness and seed coat dry weight were negatively correlated with rate of osmosis through the seed coats. Colored seeds had greater seed coat dry weight and thickness than white-seeded isolines.

Contributor Notes

Received for publication February 1, 1977.

Research Geneticist.

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