ISHS Acta Horticulturae 179: V International Symposium on Growth Regulators in Fruit Production
OXIDATIVE PROCESSES IN BUD DORMANCY AND THE USE OF HYDROGEN CYANAMIDE IN BREAKING DORMANCY |
| Authors: | Y. Shulman, G. Nir, S. Lavee |
| Abstract:
Cyanamide (H2CN2) was found to be a useful dormancy breaking agent in warm regions. Sprays of 1–5% commercial cyanamide ("Liquid Cyanamide", SKW, Trostberg, W. Germany) induced early, uniform and full bud break in almond, apple, actinidia, fig, grapevine, peach, persimmon and plum. Treatments of 1% pure H2CN2 induced germination of grapevine seeds, and replaced chilling requirements. In grapevine buds application of H2CN2 resulted in a reduction of catalase activity, while peroxidase activity was generally unchanged. Chilling of potted grapevine plants to 4°C, which induced sprouting, also induced a marked reduction of catalase activity in the buds without affecting peroxidase activity. It is suggested that H2CN2 or chilling is involved in breaking dormancy by reducing catalase activity. | |
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