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Effects of summer pruning and crop load on summer and winter bud carbohydrates in sweet cherry


Measham, PF and Quentin, AG and MacNair, N, Effects of summer pruning and crop load on summer and winter bud carbohydrates in sweet cherry, Journal of American Society for Horticultural Science, 139, (4) pp. 478-486. ISSN 0003-1062 (2014) [Refereed Article]

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Copyright 2014 American Society for Horticultural Science

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DOI: doi:10.21273/JASHS.139.4.478


Orchard management practices have the potential to influence carbohydrate supply to storage organs, including buds. This study was designed to assess if bud carbohydrates could be manipulated by orchard practices in sweet cherry (Prunus avium). Additionally, we investigated the impact of any such changes on subsequent bud burst and fruit quality the next season. We examined the effect of pruning at different fruit growth stages and cropload on summer and winter bud non-structural carbohydrates (NSCs) and on fruit quality at harvest the next summer in two cultivars. Buds were collected postharvest in summer and after the onset of dormancy in winter, and individual soluble sugars and starch were extracted. The next growing season, flower number and fruit set were recorded. When fruit reached full maturity, fruit were harvested for quality assessment. We observed qualitative changes in NSCs from buds collected in summer and winter. Pruning significantly reduced available NSCs in late summer buds but made little difference by winter; only early pruning showed slight changes in sucrose and glucose. However, early pruning positively influenced the next seasonís fruit grade. High cropload resulted in higher NSCs in winter buds than the low cropload. Significant changes in sucrose from summer to winter were observed, and levels of sucrose in the buds differed between cultivars. Different levels of winter bud sucrose between cultivars corresponded to different rates of bud burst. Although pruning was able to manipulate NSCs in buds within a few weeks, these changes were not sufficient to influence the rate of bud burst within a cultivar, but pruning did influence fruit quality in the next season.

Item Details

Item Type:Refereed Article
Keywords:bud burst, fruit quality, Prunus avium
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Horticultural production
Research Field:Horticultural crop growth and development
Objective Division:Plant Production and Plant Primary Products
Objective Group:Horticultural crops
Objective Field:Stone fruit (excl. avocado)
UTAS Author:Measham, PF (Dr Penny Measham)
UTAS Author:MacNair, N (Mr Nicholas MacNair)
ID Code:91093
Year Published:2014
Web of Science® Times Cited:2
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2014-05-07
Last Modified:2017-11-06

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