Noun
protochlorophyllide (plural protochlorophyllides)
(biochemistry) Any of several fluorescent pigments that are converted to chlorophyll by photoconversion.
Plants that are fed by ALA accumulate high and toxic levels of protochlorophyllide; so do the mutants with the damaged regulatory system. Source: Internet
In Angiosperm plants, the last step, conversion of protochlorophyllide to chlorophyll, is light-dependent and such plants are pale ( etiolated ) if grown in the darkness. Source: Internet