ISHS Acta Horticulturae 293: IX International Symposium on Apricot Culture
INFLUENCE OF LIGHT AND CHILLING CONDITIONS ON APRICOT BUD OPENING |
| Authors: | R. Guerriero, G. Scalabrelli, C. Fiocchi |
| Abstract:
Apricot plants cv. 'Tirinto' grown in containers, at leaf fall were subjected to constant (6°C) and cyclic daily regime (6/18°C) and light intensity of 60uEm2s-1 for 8 hours. Half of the plants were shaded for 95%. Every 10–15 days plants were forced at 18°C in LD conditions. Light during chilling had a negative effect only on the leaf bud (LB) opening, which varied according to the bud's state of dormancy and thermic regime. Prolonged exposure to the cyclic regime (6/18°C) permitted to the LB to overcome the antagonistic effect of light. Flower buds (FB) were slightly affected by light. The negation effect of 18°C was evaluated in around - 0.2 for FB, while for LB it was strongly influenced by light conditions. The unexpected high CR of this cultivar suggest the hypotesis of the variable intensity of dormancy according to environmental conditions. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
