Chlorophyll ''d'' is a form of

chlorophyll Chlorophyll (also chlorophyl) is any of several related green pigments found in cyanobacteria and in the chloroplasts of algae and plants. Its name is derived from the Greek words , ("pale green") and , ("leaf"). Chlorophyll allow plants to a ...

, identified by

Harold Strain Harold may refer to: People * Harold (given name), including a list of persons and fictional characters with the name * Harold (surname), surname in the English language * András Arató, known in meme culture as "Hide the Pain Harold" Arts a ...

and Winston Manning in 1943. It is present in

cyanobacteria Cyanobacteria (), also known as Cyanophyta, are a phylum of gram-negative bacteria that obtain energy via photosynthesis. The name ''cyanobacteria'' refers to their color (), which similarly forms the basis of cyanobacteria's common name, blu ...

which use energy captured from sunlight for photosynthesis. Chlorophyll ''d'' absorbs far-red light, at 710 nm wavelength, just outside the optical range. An organism that contains chlorophyll ''d'' is adapted to an environment such as moderately deep water, where it can use far red light for photosynthesis, although there is not a lot of visible light.

References

{{Plant pigments Tetrapyrroles Photosynthetic pigments