ISHS Acta Horticulturae 384: X International Symposium on Apricot Culture
HIGH TEMPERATURE INFLUENCE ON THE PRESENCE OF FLOWER BUD ANOMALIES IN TWO APRICOT VARIETIES CHARACTERIZED BY DIFFERENT PRODUCTIVITY |
| Authors: | R. Viti, P. Monteleone |
| Keywords: | Prunus armeniaca L., flower biology, climatic conditions |
| Abstract:
Previous research had shown that the presence of a high percentage of flower bud anomalies in winter, when they were still in dormancy, could be related to high temperature periods (more than 5 days). Two different cultivars, "San Castrese" and "Portici", were grown in pots and controlled temperature in growth chambers to verify the high temperature influence. Two temperatures (at 9° C for 20 hrs and 20° C for 4 hrs; with 10 hrs of light and 14 hrs of dark) were tested for 5, 10 and 15 days at two different times: an early dormancy stages with 500 C.U., and a later stage at 800 C.U.. Flower bud observations were carried out: fresh weight, anomalies percentage and characterization, blooming percentage. A clear increase in flower bud anomalies and necrosis was observed after 5 days too. Exposure to high temperature during the late period (once 800 C.U. had been accumulated) proved to be particularly damaging. | |
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