Impact of Presowing Seed Treatments, Temperature and Seed Coats on Germination of Velvet Bundleflower
Journal of range management
Seeds with both smooth and rough, apparently scarffred, seed coats occur in harvested samples of velvet bundleflower (Desmon-Thus velutinus Scheele.). To determine the degree of scarification, germination responses of rough and smooth seeds were investigated at 4 night/day temperature regimes, 5/WC, 10/2oOC, 15/25' C, and 20/3O"C with a 1Zhour photoperiod during the high temperature and with 3 seed treatments, cutting, acid scarification and hot water soak. Rough seed coats appear to be caused
... ppear to be caused by peeling of the cuticular layer on the seed surface. Moisture was imbibed more rapidly by smooth seeds, and total germination of smooth seeds was 31% without treatment, 4 times greater than rough seed germination. Treatments increased germination of smooth seeds two-to four-fold and rough seeds over lo-fold. After treatment, rough seeds germinated significantly (X.05) better than smooth seeds at all temperature regimes except 5/15' C. Cut and scarified seeds generally germinated more rapidly than watertreated seeds, but total germination was similar for all treatments at warmer temperatures. Germination was only 31% at 5/15' C.