Dormancy Characteristics of Malus 'Snowdrift'and Effects of Spraying 6-benzyladenine on Its Germination and Flowering in Long-day Treatment

摘要

[Objective] The dormancy characteristics of Malus 'Snowdrift' in long-day treatment were studied, and 6-BA was used to break the dormancy, with the aim to achieve the purpose of flowering in autumn. [Method] The new shoots of 'Snowdrift' in long-day treatment were conducted with hydroponics to investigate their dormancy time. And cytokinin 6-benzyladenine (6-BA)was used to treat the dormant shoots, to investigate the budding, flowering and flower bud differentiation. [Result] The shoots in long-day treatment entered endodormancy after August 7th and the shoots in the natural daylight entered endodormancy before July 18th. In long-day treatment, 116 buds, 198 flowers were observed after 6-BA spraying. [Conclusion] The optimum concentration of 6-BA was 300 mg/L. And the flower bud differentiation of 'Snowdrift' in long-day treatment was faster than those in natural daylight after 6-BA spraying.