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Temperature effects on dormancy completion of vegetative buds in apple
Year:
2003
Authors :
Erez, Amnon
;
.
Flaishman, Moshe
;
.
Volume :
128
Co-Authors:
Naor, A., Golan Research Institute, Kazrin 12900, Israel
Flaishman, M., Institute of Horticulture, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Stern, R., MIGAL - Galilee Technology Center, P.O. Box 90000, Kiryat Shmona 12100, Israel
Moshe, A., Northern R. and D., P.O. Box 90000, Kiriat Shmona 12100, Israel
Erez, A., Golan Research Institute, Kazrin 12900, Israel
Facilitators :
From page:
636
To page:
641
(
Total pages:
6
)
Abstract:
The relative contribution of various temperatures to dormancy completion of lateral vegetative apple [Malus sylvestris (L.) Mill. var. domestica (Borkh.) Mansf.] buds was studied quantitatively on whole container-grown trees. Trees were exposed continuously to 10 different temperatures and also to daily alternating temperatures in a 24-hour cycle. In addition, fully chilled vertically and horizontally positioned shoots were compared under forcing conditions. No budbreak occurred in shoots chilled above 12.5°C. There was a steep increase in budbreak as the chilling temperature fell from 12.5 to 7.5°C. There was little difference in the level of budbreak on shoots chilled between 7.5 and 0°C. The relative contribution of temperature to chilling accumulation in apple found in our study differs from what has been proposed for stone fruit and for apple in previous studies, especially at temperatures <6°C. The length of exposure to forcing conditions required to initiate budbreak diminished as the chilling temperature was reduced. No additional budbreak was apparent on shoots chilled longer than 2100 chilling hours. The chilling requirement found here for lateral vegetative buds is much higher than that needed for terminal vegetative and flower buds. Trees that were exposed to daily alternating temperatures had lower levels of budbreak when the high temperature in the diurnal cycle was greater than 14°C. Practically no budbreak was apparent on trees that were exposed to diurnal cycles with a high temperature of 20°C for 8 hours. Budbreak on horizontally positioned trees was more than twice that on the vertically positioned trees, emphasizing the magnitude of the apical dominance effect and its strong masking of the chilling effect on lateral buds in vertically grown apple trees. Based on the data collected here we propose a new response curve for vegetative budbreak in 'Golden Delicious' apple, within a temperature range between 0 to 15°C.
Note:
Related Files :
Apical dominance
Chilling requirements
Malus
Malus sylvestris
Malus x domestica
Rest
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Related Content
More details
DOI :
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
21448
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:44
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Scientific Publication
Temperature effects on dormancy completion of vegetative buds in apple
128
Naor, A., Golan Research Institute, Kazrin 12900, Israel
Flaishman, M., Institute of Horticulture, Agricultural Research Organization, Volcani Center, Bet Dagan 50250, Israel
Stern, R., MIGAL - Galilee Technology Center, P.O. Box 90000, Kiryat Shmona 12100, Israel
Moshe, A., Northern R. and D., P.O. Box 90000, Kiriat Shmona 12100, Israel
Erez, A., Golan Research Institute, Kazrin 12900, Israel
Temperature effects on dormancy completion of vegetative buds in apple
The relative contribution of various temperatures to dormancy completion of lateral vegetative apple [Malus sylvestris (L.) Mill. var. domestica (Borkh.) Mansf.] buds was studied quantitatively on whole container-grown trees. Trees were exposed continuously to 10 different temperatures and also to daily alternating temperatures in a 24-hour cycle. In addition, fully chilled vertically and horizontally positioned shoots were compared under forcing conditions. No budbreak occurred in shoots chilled above 12.5°C. There was a steep increase in budbreak as the chilling temperature fell from 12.5 to 7.5°C. There was little difference in the level of budbreak on shoots chilled between 7.5 and 0°C. The relative contribution of temperature to chilling accumulation in apple found in our study differs from what has been proposed for stone fruit and for apple in previous studies, especially at temperatures <6°C. The length of exposure to forcing conditions required to initiate budbreak diminished as the chilling temperature was reduced. No additional budbreak was apparent on shoots chilled longer than 2100 chilling hours. The chilling requirement found here for lateral vegetative buds is much higher than that needed for terminal vegetative and flower buds. Trees that were exposed to daily alternating temperatures had lower levels of budbreak when the high temperature in the diurnal cycle was greater than 14°C. Practically no budbreak was apparent on trees that were exposed to diurnal cycles with a high temperature of 20°C for 8 hours. Budbreak on horizontally positioned trees was more than twice that on the vertically positioned trees, emphasizing the magnitude of the apical dominance effect and its strong masking of the chilling effect on lateral buds in vertically grown apple trees. Based on the data collected here we propose a new response curve for vegetative budbreak in 'Golden Delicious' apple, within a temperature range between 0 to 15°C.
Scientific Publication
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