Relationship between bud cold hardiness and budbreak in two vitis vinifera L cultivars, chardonnay and thompson seedless
Author
dc.contributor.author
Pérez Correa, Francisco
Author
dc.contributor.author
Rubio Vargas, Sebastián
Admission date
dc.date.accessioned
2021-09-09T18:52:55Z
Available date
dc.date.available
2021-09-09T18:52:55Z
Publication date
dc.date.issued
2021
Cita de ítem
dc.identifier.citation
Journal of Plant Growth Regulation March 2021
es_ES
Identifier
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10.1007/s00344-021-10343-0
Identifier
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https://repositorio.uchile.cl/handle/2250/181912
Abstract
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The lack of winter cold is a severe limitation for the cultivation of grapevines (Vitis vinifera L) in areas with warm winter climates. This phenomenon is currently becoming quite important due to global warming, which will increase winter temperatures in many temperate regions of the planet where grapevines are cultivated. Although various physical and chemical stimuli have been used to address the lack of winter cold in grapevine cultivation, quantitative studies on its effects on different cultivars are limited. Here, the effects of (a) low temperatures during endodormancy (ED), (b) temperature increases during eco-dormancy (ECD) and (c) the effects of dormancy-breaking compounds such as hydrogen cyanamide (HC) and sodium azide (AZ) on the budburst of an early budbreak cultivar, Chardonnay, and an late budbreak cultivar, Thompson seedless, were assessed. The results were analysed by the Kaplan-Meier method, and the log-rank test was used to establish statistical significance between the control and treatments. In general, Chardonnay grapevines were more sensitive than Thompson seedless grapevines to all budbreak stimuli, and a temperature increase during ECD was the stimulus that had the greatest effect on the budbreak in both cultivars. Exposure to cold temperatures during ED increased the cold hardiness and improved the budbreak in both cultivars. Based on the results, a relationship between the degree of bud cold hardiness and budbreak potential is suggested, and it is proposed that the greater the cold hardiness achieved by the buds, the better their subsequent budbreak will be.
es_ES
Patrocinador
dc.description.sponsorship
Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT)
CONICYT FONDECYT 1190057