ISHS Acta Horticulturae 69: II International Symposium on Pear Growing
BIOCHEMICAL MODIFICATIONS INDUCED BY 6-BENZYLAMINOPURINE APPLICATION TO INHIBITED AXILLARY BUDS OF PEAR (CV 'BUTIRRA PRECOCE MORETTINI') |
| Author: | C. Vitagliano |
| Abstract:
A study of the early biochemical modifications taking place after hormonal treatments with 6-Benzylaminopurine (6-BAP) has been undertaken in order to attempt to identify the primary events of the release of lateral buds from apical dominance. During the study of the biochemical modifications consequent to the cytokinin application, the lipid content have been observed during 16, 24, 48 and 64 hours after treatments in different period of the year, either during the rest period or the growing period. In winter time the lipids content decreases with a modification of the fatty acids content: also the BA treatments didn't show clear modifications while in summer time, the BA treatments gave after 24 hours an increase of 15% of fatty acids. No effect on bud dry weight has been noted during dormancy but after the rest period, when lipids accumulate, an increase in bud dry weight has been detected. This result support the idea that stimulation of lipogenesis could be one of the initial event in activation of bud development. The elimination of the stem tip and/or the application of cytokinin, influenced the metabolism of lipids in the same way and both appear to play a similar role in the release of lateral buds from inhibition. | |
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