Plant surface properties in chemical ecology

Area of Science:

• Plant Biology
• Chemical Ecology
• Biophysics

Background:

• Terrestrial plants possess a cuticle covering aerial parts, essential for autecological functions and inter-organism interactions.
• The cuticle comprises a cuticular layer and cuticle proper, coated with epicuticular waxes, influencing surface properties.
• Cutin, a polyester biopolymer, and complex wax mixtures of long-chain compounds form the cuticle, dictating its hydrophobicity and microstructure.

Purpose of the Study:

• To summarize current knowledge on the physical and chemical properties of plant cuticles.
• To elucidate the role of cuticular properties in plant interactions with microorganisms, insects, and antagonists.
• To highlight the importance of characterizing plant surface physicochemical properties for ecological understanding.

Main Methods:

• Review of existing literature on plant cuticle composition and properties.
• Discussion of the physicochemical characteristics influencing plant surface functions.
• Examination of equations for estimating molecule dissolution and transport within the cuticle.

Main Results:

• Cuticular waxes' composition and microstructure determine plant surface hydrophobicity and vary by species.
• Physicochemical properties affect optical features, transpiration rates, and particle/organism adhesion.
• Glucosinolates serve as an example for understanding molecular interactions at the plant-environment interface.

Conclusions:

• Accurate characterization of plant cuticle properties is vital for understanding its ecological significance.
• The cuticle acts as a critical interface mediating plant interactions in its environment.
• Understanding cuticular properties aids in predicting plant responses and interactions in chemical ecology.