ISHS Acta Horticulturae 690: I International Rose Hip Conference
PROPAGATION OF DOG ROSES (ROSA CANINA L.) BY SEED |
| Authors: | H. Hoşafçı, N. Arslan, E.O. Sarıhan |
| Keywords: | dormancy, germination, gibberellic acid, rose-hip |
| Abstract:
Field and greenhouse studies were carried out during 1999-2001 to evaluate the effects of GA3 treatments on seed germination of dog roses. Research took place at the Department of Agronomy, Faculty of Agriculture, University of Ankara, Turkey. After harvesting the fruits, the seeds were manually extracted and treated with different concentrations of GA3. The first year, no significant difference in seed germination was detected in the greenhouse trial. The second year, however, 24.7% of the seeds germinated when treated with 300 ppm GA3 for 24 hours, and as much as 74.0% when treated with 2000 ppm GA3 for 12 hours. For the field study, chilled seeds (4°C), seeds kept within fruits at room temperature, and seeds kept at 4°C within fruits, were treated with different concentrations of GA3. After 6 months of treatment the seeds were sown. Similarly to the greenhouse study, no germination was detected in the field study during the first year. The second year, however, frequency of germination ranged from 11.7% for chilled seeds treated with 200 ppm GA3 for 6 hours, to 52.0% for unchilled seeds (kept within fruits at room temperature) treated with 400 GA3 for 12 hours. There was a positive correlation between seed germination and concentration of applied GA3. | |
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