Leaf area to fruit weight ratios for maximising grape berry weight, sugar concentration and anthocyanin content during ripening

Auzmendi, I. and Holzapfel, B.P. (2016) Leaf area to fruit weight ratios for maximising grape berry weight, sugar concentration and anthocyanin content during ripening. Acta Horticulturae, 1115 127-132. doi:10.17660/ActaHortic.2016.1115.19


Author Auzmendi, I.
Holzapfel, B.P.
Title Leaf area to fruit weight ratios for maximising grape berry weight, sugar concentration and anthocyanin content during ripening
Journal name Acta Horticulturae   Check publisher's open access policy
ISSN 0567-7572
ISBN 9789462611108
Publication date 2016
Sub-type Article (original research)
DOI 10.17660/ActaHortic.2016.1115.19
Volume 1115
Start page 127
End page 132
Total pages 6
Place of publication Leuven, Belgium
Publisher International Society for Horticultural Science
Collection year 2017
Language eng
Formatted abstract
Vineyard management requires the maintenance of the leaf area per unit weight of fruit necessary for growing grapes without detrimental effects on fruit composition. Leaf removal and bunch thinning experiments have previously shown some effects on berry composition. Several berry compositional parameters (e.g. berry weight, sugar concentration and colour) increase with leaf area to fruit weight ratio until reaching an optimum or saturation point. Further increases in the ratio do not have any significant effect. However, optimum ratios from previous experiments have been determined only at harvest and they are highly variable. Irrigated Merlot grapevines were used to study the relationship between leaf area to fruit weight ratio and mean berry weight, sugar concentration and anthocyanin content during ripening. Four defoliation treatments were applied to individual girdled shoots at berry pea size stage. After veraison, leaf and fruit samples were collected weekly until berry maturity and leaf area, fruit weight per shoot, berry weight, sugar concentration and anthocyanins were measured. Berry weight, sugar concentration and anthocyanin content were correlated with leaf area to fruit weight ratio from veraison through to maturity. The fitted regressions allowed us to determine the ratios that maximised the measured compositional parameters. Leaf area per fruit weight necessary for maximum berry weight was more variable than that for sugar concentration and anthocyanin content. Greater leaf area to fruit weight was required for maximising anthocyanin content than that for sugar concentration. We defined optimum leaf area to fruit weight ratios within certain ranges for the ripening period in our vineyard.
Keyword Vitis vinifera
Crop load
Defoliation
Total soluble solids
Colour
Fruit quality
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
Queensland Alliance for Agriculture and Food Innovation
 
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Created: Sun, 05 Jun 2016, 15:28:49 EST by Inigo Auzmendi on behalf of Centre for Plant Science