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January 23, 2026International Journal of Molecular Sciences0 citationsOpen Access

Transcriptional Insights on Ripening and Sugar Regulation in Japanese Wine Grape Koshu

Transcriptional Insights Suggest Altered Ripening Progression and Sugar Regulation in Japanese Indigenous Wine Grape Vitis sp. cv. Koshu

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Authors

NHNao HayashiKFKeiko Fujita

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Overview

Comparative transcriptome analysis reveals altered sugar regulation and ripening progression in Vitis Koshu, suggesting new breeding strategies.

Key Points

  • The aim is to analyze the transcriptional profile related to ripening and sugar accumulation in Vitis sp. cv. Koshu.
  • Conducted comparative transcriptome analysis of Koshu and Chardonnay grape berries
  • Analyzed gene expression at 10 days post-véraison
  • Identified differentially expressed genes related to ripening and sugar metabolism
  • Identified 5534 differentially expressed genes in Koshu compared to Chardonnay
  • Downregulation of ripening marker GRIP22-like and suppression of cell wall-loosening genes
  • Upregulation of photosynthesis-related genes and key sugar enzymes linked to low sugar content
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Cite This Study

Hayashi et al. (2026) studied this question.

synapsesocial.com/papers/69730f9fc8125b09b0d1f635https://doi.org/10.3390/ijms27021061
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