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American Journal of Botany, Vol 85, 492, Copyright © 1998 by Botanical Society of America, Inc.

PHYSIOLOGY AND DEVELOPMENT

Development of protein bodies and accumulation of carbohydrates in a soybean (Leguminosae) shriveled seed mutant

Z Chen, H Ilarslan, RG Palmer and RC Shoemaker

The soybean seed mutant T311, when grown under specific environmental conditions, produces shriveled seed. This research investigated changes in development of protein bodies and accumulation of carbohydrates during seed development by comparing the mutant with P2180 seeds. The shriveled seeds contained larger protein bodies but fewer protein bodies per cell than round seeds. Protein bodies in T311 seeds included more dispersed crystals and less globoid regions than P2180 seeds. The elemental compositions of the crystals and of whole seeds in T311 were different from that in P2180 seeds. Starch breakdown was reduced with concomitant lower soluble sugar content in T311 seeds after the D11 stage (10.0-11.9 mm long seeds). The reduced starch breakdown and lowered soluble sugar content were consistent with lower a-amylase activity and earlier and greater water loss in T311 seeds. Changes in development of protein bodies and accumulation of carbohydrates were associated with the development of the shriveled seeds.


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