The Interactive Effect of Pruning Level and Irrigation Strategy on Grape Berry Ripening and Composition in Vitis vinifera L. cv. Shiraz
AbstractA partial rootzone drying (PRD) irrigation technique (0.5 ML/ha) was compared with a standard irrigation treatment
(1 ML/ha) at three different pruning levels of 30, 60 and 120 nodes per grapevine in Vitis vinifera L. cv Shiraz. Berry
size was found to decrease as node number per grapevine increased, but was not significantly altered by the PRD
treatment. The influence of these treatments on the accumulation of total soluble solids per berry was investigated
during berry ripening and was shown to be reduced at higher node number (120 nodes). There was no effect of
PRD on the accumulation of total soluble solids. Juice titratable acidity and the concentration (per g) and content
(per berry) of grape anthocyanins and phenolics were compared between treatments at harvest. In one season of
the study, juice titratable acidity, anthocyanin and phenolic concentration was unaltered by the PRD treatment. In
a further season, juice titratable acidity was decreased in response to the PRD treatment and was associated with
increases in grape anthocyanin and phenolic concentration in response to PRD. Where there was a small increase
in anthocyanin concentration in response to PRD, this was found to be independent of berry size. In addition, linear
regression analysis showed a poor relationship between berry size and anthocyanin concentration, but a significant
relationship was found between berry size and anthocyanins per berry.
A copyright form will be e-mailed to the corresponding author when the manuscript has been accepted for publication.
In principle, the Author agrees to the following when he/she signes the copyright agreement:
I hereby assign to the SOUTH AFRICAN SOCIETY FOR ENOLOGY AND VITICULTURE (SASEV) the copyright of the text, tables, figures, supplementary material, illustrations and other information (the Material) submitted with the manuscript to be published in SOUTH AFRICAN JOURNAL OF ENOLOGY AND VITICULTURE (SAJEV) (the "Article"). The copyright becomes effective from the date the Article has been accepted for publication in SAJEV.
This is an open access journal, and the authors and journal should be properly acknowledged, when works are cited.
Author's may use the publishers version for teaching purposes, in books, theses, dissertations, conferences and conference papers.
A copy of the authors' publishers version may also be hosted on the following websites:
- Non-commercial personal webpage or blog.
- Institutional webpage.
- Authors Institutional Repository.
The following notice should accompany such a posting on the website: This is an electronic version of an article published in SAJEV, Volume XXX, number XXX, pages XXX - XXX, DOI. Authors should also supply a hyperlink to the original paper or indicate where the original paper (www.journals.ac.za/index.php/sajev/) may be found.
Authors publishers version, affiliated with the Stellenbosch University will be automatically deposited in the University's Institutional Repository SUNScholar.
Articles as a whole, may not be re-published with another journal.
The following license applies:
Attribution CC BY-NC-ND 4.0