Impact of reduced atmospheric CO2 and varied potassium supply on carbohydrate and potassium distribution in grapevine and grape berries (Vitis vinifera L.)

Coetzee, Zelmari A., Walker, Rob R., Deloire, Alain J., Barril, Célia, Clarke, Simon J. and Rogiers, Suzy Y. (2017) Impact of reduced atmospheric CO2 and varied potassium supply on carbohydrate and potassium distribution in grapevine and grape berries (Vitis vinifera L.). Plant Physiology and Biochemistry, 120 252-260. doi:10.1016/j.plaphy.2017.10.008


Author Coetzee, Zelmari A.
Walker, Rob R.
Deloire, Alain J.
Barril, Célia
Clarke, Simon J.
Rogiers, Suzy Y.
Title Impact of reduced atmospheric CO2 and varied potassium supply on carbohydrate and potassium distribution in grapevine and grape berries (Vitis vinifera L.)
Formatted title
Impact of reduced atmospheric CO2 and varied potassium supply on carbohydrate and potassium distribution in grapevine and grape berries (Vitis vinifera L.)
Journal name Plant Physiology and Biochemistry   Check publisher's open access policy
ISSN 0981-9428
1873-2690
Publication date 2017-11-01
Year available 2017
Sub-type Article (original research)
DOI 10.1016/j.plaphy.2017.10.008
Open Access Status Not yet assessed
Volume 120
Start page 252
End page 260
Total pages 9
Place of publication Issy les Moulineaux Cedex, France
Publisher Elsevier Masson
Language eng
Formatted abstract
To assess the robustness of the apparent sugar-potassium relationship during ripening of grape berries, a controlled-environment study was conducted on Shiraz vines involving ambient and reduced (by 34%) atmospheric CO2 concentrations, and standard and increased (by 67%) soil potassium applications from prior to the onset of ripening. The leaf net photoassimilation rate was decreased by 35% in the reduced CO2 treatment. The reduction in CO2 delayed the onset of ripening, but at harvest the sugar content of the berry pericarp was similar to that of plants grown in ambient conditions. The potassium content of the berry pericarp in the reduced CO2 treatment was however higher than for the ambient CO2. Berry potassium, sugar and water content were strongly correlated, regardless of treatments, alluding to a ternary link during ripening. Root starch content was lower under reduced CO2 conditions, and therefore likely acted as a source of carbohydrates during berry ripening. Root carbohydrate reserve replenishment could also have been moderated under reduced CO2 at the expense of berry ripening. Given that root potassium concentration was less in the vines grown in the low CO2 atmosphere, these results point toward whole-plant fine-tuning of carbohydrate and potassium partitioning aimed at optimising fruit ripening.
Keyword Carbohydrates
CO2
Grape berry
Grapevine
Photoassimilation
Potassium
Sugar
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID IC130100005
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Political Science and International Studies Publications
 
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Created: Fri, 03 Nov 2017, 09:06:21 EST