Work

GABA in Grapevines - Is it only a Compound for Nitrogen Storage and/or an Import Stress and Quality Indicator?

Year: 2013

Type: article

Abstract: Taking into account all information about GABA in different plants we tried to find out some of the fundamental roles of GABA in grapevines: Its dynamic in different plant organs including vegetative and generative ones as well as dependencies on exogenous factors. AA dynamic in one year old wood was confirmed according former findings; N nutritional status of the vine has an important influence on stored amounts of Arg, Gln, Glu and GABA. Shoots shows relatively low contents of all determined AAs; highest amounts are found with Ala, Gln and Glu. Fertilization increases Gln and Glu. Highest amounts of al AAs are found in emerging and developing leaves; GABA has highest amounts besides Glu. The influence of N fertilization is obvious. In developing fruits main AA is Gln; role of GABA is just unclear. GABA synthesis seems to be dependent on GDD and on N nutritional status of the grapevine. In further research work more emphasis has to be laid on the influence of exogenous factors like water, light and also diseases. The relationship on wine quality is still open but the by-products of GABA-shunt should be shifted in the focus of wine makers and wine microbiologists.

Source: Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca Horticulture

DOI: 10.15835/buasvmcn-hort:9648

Author: Klaus Schaller

Institution: Hochschule Geisenheim University

Language: English

Topic: Horticultural and Viticultural Research

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDG: Zero hunger

Open Access status: gold

Estimated APC paid: $91