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Research Article Open access CC BY 4.0

Changes in the Activities of Sugars and Sugar Metabolic Enzymes in Grape Berries during Development

Shafia Bashir, Nirmaljit Kaur, N. K. Arora

Current Journal of Applied Science and Technology · pp. 1–6 · Published 18 Jan 2018

10.9734/CJAST/2017/38532

Abstract

Accumulation of sugars is an important metabolic process that occurs during grape berry development. Sugars are transported into the berry mainly in the form of sucrose and are broken down into glucose and fructose by the enzymes invertase and sucrose synthase. Changes in activities of invertase and sucrose synthase in the juice of three table grape genotypes (Flame Seedless, Perlette and Muscat Hamburg) was studied during four developmental stages. The characteristic rapid increase in the rate of sugar accumulation in the juice throughout the development was preceded by the activity of invertase. At the same time the rate of sugar accumulation also increased the activity of sucrose synthase. There is a possibility that sugar accumulation in grape juice occurs by pathway involving changes in the activity of enzyme for this process to operate. The results of the present study suggests that in the grape genotypes studied, invertase and sucrose synthase activities are positively correlated with high berry sugar content.

Grape juice table grapes stages enzymes sugars sucrose glucose

References (5)

  1. 1 Sugar and acid concentrations in 98 grape cultivars analyzed by principal component analysis [DOI]
  2. 2 Changes in sugar content and relative enzyme activity in grape berry in response to root restriction [DOI]
  3. 3 Relationship Between Sucrose Accumulation and Sucrose-Metabolizing Enzymes in Developing Grapes [DOI]
  4. 4 Sucrose Metabolism in Sources and Sinks [DOI]
  5. 5 SUGAR COMPOSITION CHANGES IN 'AUTUMN SEEDLESS' TABLE GRAPE DURING LONG TERM COLD STORAGE [DOI]

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