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Relationships Between Cell Structure Alterations and Berry Abscission in Table Grapes.

Mingjuan Li1,2, Zhanwen Huang3, Xiangrong You1,2

  • 1Agro-Food Science and Technology Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, China.

Frontiers in Nutrition
|June 30, 2020
PubMed
Summary

Structural changes in grape berry junctions and brush cells directly impact postharvest berry drop. "Nanyu" grapes showed the least structural alteration, maintaining higher detachment force and lower berry abscission during storage.

Keywords:
berry abscissionduring storagemicrostructuretable grapeultrastructure

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Area of Science:

  • Horticultural Science
  • Plant Physiology
  • Postharvest Biology

Background:

  • Postharvest berry abscission is a significant issue in table grape storage.
  • Understanding the structural basis of berry detachment is crucial for extending shelf life.

Purpose of the Study:

  • To investigate the relationship between structural alterations and postharvest berry abscission in three table grape cultivars.
  • To analyze microstructural and ultrastructural changes in relation to berry detachment force and abscission over storage time.

Main Methods:

  • Microstructure and ultrastructure analysis of stalk-berry junction and berry brush cells.
  • Measurement of berry detachment force.
  • Assessment of berry abscission rates during storage at room temperature for 0, 3, and 6 days.

Main Results:

  • "Muscat Kyoho" and "Kyoho" showed increased cell lignification and suberization initially, followed by degradation and disappearance of cells.
  • "Nanyu" exhibited less cell alteration, with smaller, denser berry brush cells and slower structural changes.
  • Berry detachment force decreased, and berry abscission increased over storage, with "Nanyu" showing the lowest abscission and highest detachment force.

Conclusions:

  • Structural alterations in grape berry junctions and brush cells are directly linked to postharvest berry abscission.
  • Cultivar-specific structural differences influence susceptibility to berry drop during storage.
  • "Nanyu" demonstrates superior postharvest stability due to its distinct structural characteristics.