Carbon Isotope Ratios (13C/12C) in Fractions of Field‐Grown Grape
- 1 October 1977
- journal article
- Published by Wiley in Physiologia Plantarum
- Vol. 41 (2) , 139-141
- https://doi.org/10.1111/j.1399-3054.1977.tb05545.x
Abstract
The carbon isotope ratio (δ13C%) in leaves and berries of Vitis vinifera L. was determined during the fruiting season.The δ13C was from −24.6 to −26.3 in total leaf tissue, while it is from −22.7 to −24.3 in the aqueous extract of leaves. The δ13C in the berries was more stable, around −24, with no change during ripening. Malic and tartaric acid, isolated from the berries at the onset of ripening, showed a δ13C of −23.5 and −23.0 respectively. It was concluded that malic acid accumulated in the berries at the onset of ripening is not formed directly through β‐carboxylation.Keywords
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