The outermost epidermal cell layer of fleshy fruit is surrounded by a hydrophobic cuticle, notably thicker than that found on vegetative tissues. This cuticle, primarily composed of the cutin polymer, also contains waxes and sometimes polysaccharides. It serves crucial functions, including regulating water and gas transport, protection against pathogens, and shielding from UV radiation. Failure of the fruit skin, which can manifest in ways ranging from browning to cracking, negatively impacts the fruit’s development, appearance, and marketability.
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Source: Phys.org