GERMINATION OF EASTERN REDBUD IN RELATION TO TESTA ANATOMY

in HortScience
Authors:
Rodney JonesDepartment of Horticulture, University of Kentucky, Lexington, Kentucky 40546

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Robert GeneveDepartment of Horticulture, University of Kentucky, Lexington, Kentucky 40546

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Redbud (Cercis canadensis) is a small woody ornamental legume that has a hard seed coat, which imposes physical dormancy, typical of many legumes. Redbud also possesses an internal embryo dormancy that must be overcome by stratification. In order to observe the relationship between anatomy and germination, seeds were embedded in JB-4 resin during various developmental and germination stages. The seeds were cut longitudinally with a glass bladed microtome, to observe the radicle, vascular traces and testa. It appears that the vascular traces left from the funiculus serve as a weak point in non-dormant seeds that allows the radicle to rupture the testa during germination.

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