Articles
Investigating the effect of warm temperatures during ecodormancy in time of bud break of two apple cultivars in south-east UK
Article number
1346_8
Pages
59 – 66
Language
English
Abstract
Projected warmer temperatures due to climate change will affect the dormancy cycle, which determines the timing and quality of bud break.
An absence of chilling can hinder dormancy development, negatively impacting fruit production; and warmer temperatures in spring advance blooming dates, increasing the risk of frost damage.
Existing models to predict time of bud break were developed based on experimental work with a particular fruit tree species, however, they are used to make predictions in other species, omitting model re-parametrisation and assuming an equal response to temperature.
We developed cultivar-specific bud break models using excised apple shoots to investigate how two apple cultivars, Braeburn Mariri Red and Galaxy Gala, would respond to high temperatures during the ecodormancy phase.
Results showed that after fulfilling chilling requirement, an increase of 1°C in forcing temperature could advance bud break more than 2 days in both cultivars.
Models were used to simulate heatwave events, which indicated a higher sensitivity of Braeburn Mariri Red to warmer temperatures.
The models and simulations created a valuable tool to improve our understanding of how two commercially important apple cultivars would behave under different climate scenarios.
An absence of chilling can hinder dormancy development, negatively impacting fruit production; and warmer temperatures in spring advance blooming dates, increasing the risk of frost damage.
Existing models to predict time of bud break were developed based on experimental work with a particular fruit tree species, however, they are used to make predictions in other species, omitting model re-parametrisation and assuming an equal response to temperature.
We developed cultivar-specific bud break models using excised apple shoots to investigate how two apple cultivars, Braeburn Mariri Red and Galaxy Gala, would respond to high temperatures during the ecodormancy phase.
Results showed that after fulfilling chilling requirement, an increase of 1°C in forcing temperature could advance bud break more than 2 days in both cultivars.
Models were used to simulate heatwave events, which indicated a higher sensitivity of Braeburn Mariri Red to warmer temperatures.
The models and simulations created a valuable tool to improve our understanding of how two commercially important apple cultivars would behave under different climate scenarios.
Publication
Authors
C. Gonzalez Noguer, M. Else, P. Hadley
Keywords
flowering, chilling, frost damage, climate change, heatwaves
Online Articles (107)