Modifications in Organic Acid Profiles During Fruit Development and Ripening: Correlation or Causation?

Area of Science:

• Plant Biology
• Fruit Development
• Metabolic Engineering

Background:

• Phytohormones are well-established regulators of fruit development.
• Emerging evidence highlights the significant role of organic acids in fruit maturation and ripening.

Purpose of the Study:

• To critically review the connection between organic acids and the development of climacteric and non-climacteric fruits.
• To analyze the metabolic content of fruits during ontogeny and identify key organic acids involved.

Main Methods:

• Analysis of metabolic content across fruit ontogenetic trajectories.
• Review of studies involving manipulation of fruit-specific genes and promoters related to organic acid metabolism.

Main Results:

• Organic acid content in early fruit development correlates with respiratory substrate supply.
• Citrate and malate are key organic acids accumulating in diverse fruit types.
• Changes in organic acid profiles are functionally significant and can be modulated by genetic manipulation.

Conclusions:

• Organic acids play a vital role in fruit metabolism, development, and ripening.
• Engineering organic acid metabolism offers potential for improving crop fruit quality and yield.