Phenylpropenes: Occurrence, Distribution, and Biosynthesis in Fruit.

Area of Science:

• Plant biochemistry
• Aroma compound analysis
• Fruit volatile research

Background:

• Phenylpropenes (e.g., eugenol, estragole) are vital for the aroma and flavor of herbs and spices.
• These compounds also act as floral attractants and possess antifungal/antimicrobial properties.
• Phenylpropenes are present in various fruits, contributing spicy notes.

Purpose of the Study:

• To investigate the presence and contribution of phenylpropenes in economically important fruits.
• To understand the role of phenylpropenes in fruit aroma profiles.
• To validate the genetic basis of phenylpropene biosynthesis in fruit.

Main Methods:

• Analysis of free volatiles and glycosides in fruits.
• Characterization of genes involved in phenylpropene biosynthesis.
• Genetic manipulation in model fruit systems (strawberry, apple).

Main Results:

• Phenylpropenes identified in fruits like apple, strawberry, tomato, and grape.
• These compounds contribute distinct spicy, anise-, and clove-like notes to fruit aroma.
• Phenylpropene concentrations peak in ripe fruit.
• Genes for phenylpropene biosynthesis have been identified and manipulated, confirming their importance.

Conclusions:

• Phenylpropenes significantly impact fruit aroma, despite low overall volatile concentration.
• Understanding phenylpropene biosynthesis is crucial for fruit quality and potential applications.
• Further research may uncover additional functions of phenylpropenes in fruit development and defense.