Journal
INTERNATIONAL JOURNAL OF BIOMETEOROLOGY
Volume 66, Issue 7, Pages 1391-1401Publisher
SPRINGER
DOI: 10.1007/s00484-022-02284-4
Keywords
Bud break; Chilling requirements; Climate change; Flowering; Monomeric anthocyanins
Funding
- Danish Council for Independent Research | Technology and Production Sciences [DFF-1335-00182]
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The rate of global warming varies between seasons, with a more pronounced effect in winter and spring at high latitudes. Winter warming has minimal impact on spring phenology and fruit yield in blackcurrant crops, but significantly alters the composition of phenolic compounds and reduces soluble sugars in berries.
The rate of global warming varies in magnitude between seasons, with warming being more pronounced in winter and spring than in summer and autumn at high latitudes. Winter warming can have profound effects on dormancy release and spring phenology of perennial fruit crops, but potential follow-on impacts on growth, fruit yield or quality have only rarely been investigated. We studied the effects of mild winter warming on spring phenology, current year shoot growth, cropping performance and fruit quality in four field-grown cultivars of blackcurrant with different chilling requirements. Plants were exposed to ambient or slightly elevated (+0.5 degrees C) temperatures from early October to mid-April the following year. Winter warming had few effects on spring phenology and fruit yield, but caused significant changes in berry contents of phenolic compounds and a reduction in soluble sugars. Increased vegetative growth of warmed plants likely accounts for the changes in berry quality. The results demonstrate a persistent effect of winter warming on shoot growth, which indirectly changes fruit quality.
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