Conditions for Dormancy Breaking and Germination of European Hophornbeam (Ostry carpinifolia Scop.) Seed

1991

S. 147-163

8 Lit. Ang.

Unselbständiges Werk

200052488

The experiments were preceded by the segregation of seeds by floatation in water and in 96% ethanol into the following categories: full (sinking in water), half-full (floating in water and sinking in ethanol) and empty (floating in water and ethanol). Most effective for breaking of dormancy of full and half-full seeds was the warm-followed-by-cold stratification with the warm phase at 20 Grad C lasting 4 weeks. After such stratification, germination ran best in a cyclically alternating temperature 3 Grad ungefaehr 20 Grad C (16+8 hours/cycle). The ethanol used for seed segregation was without effect on the germinative capacity, but this was valid only in the most effective conditions of stratification and germination. Of the half-full seeds only about 50% were able to germinate.