Red-violet Pigment Research Articles

Biosynthesis of amaranthin in Celosia plumosa

Seedlings of a yellow betaxanthin-producing variety of Celosia plumosa when fed with appropriate precursors are capable of synthesizing the red-violet pigment normally present in red varieties of the same species, namely amaranthin. Synthesis of amaranthin occurs in seedlings following administration of betanidin and betanin but much greater accumulation was observed after feeding cycloDOPA and its 5- O-β- d-glucoside. Possible pathways in the biosynthesis of amaranthin are discussed.

On betacyanins, the nitrogen containing pigment of Centrospermae. Preliminary report

A micro-examination of the hydrolyzed redviolet pigments of some centrospermae families, calledbetacyanins, led to the conclusion that they are derived from betanidin and isobetanidin, and are thus all nitrogenous.