accessory pigment


Definition of accessory pigment

: any of various pigments (such as carotenoids and phycobilins) that are found in photosynthetic cells and absorb light of wavelengths not absorbed by chlorophyll a Algae at deep regions receive mostly green and blue light and must have special accessory pigments capable of absorbing these wavelengths efficiently.— James D. Mauseth, Botany: An Introduction to Plant Biology, 2009

Note: The light energy absorbed by accessory pigments must be transferred to chlorophyll a before it can be used in photosynthesis.

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First Known Use of accessory pigment

circa 1893, in the meaning defined above

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The first known use of accessory pigment was circa 1893

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Cite this Entry

“Accessory pigment.” Dictionary, Merriam-Webster, Accessed 25 Oct. 2020.

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