Biochemical Studies of Rib Discoloration and Pink Rib of Lettuce
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چکیده
The resulting injury to specific cells of the leaves releases the contents of the vacuoles, allowing intermixing with enzymes associated with other cell structures. Phenol oxidase is such an enzyme and causes the oxidation of various polyphenols (tannin -like substances) normally found in the cell vacuole. Oxidation of polyphenols, followed by vaguely understood polymerization reactions, result in the formation of a variety of red or brown colored pigments that are then deposited at the site of the damaged cells or on the walls of surrounding cells.
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