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 what is chlorophyll a, b, c,....?

Chlorophyll is a family of related molecules, designated chlorophyll a, b, c, and d. They only differ in the number of molecules of different element they have like carbon, hydrogen, nitrogen etc.

 

  • Chlorophyll a is the molecule found in all plant cells. It is yellow – green in colour. It is the major pigment involved in trapping light energy and converting it in to electrical and chemical energy.
  • Chlorophyll b is common in fresh water. It is blue- green colour. It constitutes about 25% of the total chlorophyll content. It acts as an accessory pigment and helps broaden the spectrum of light absorbed during photosynthesis.
  • Chlorophyll c is also common in fresh water. It is blue- green colour.
  • Chlorophyll d is found only in marine red algae. It is greenish yellow in colour.

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Chlorophyll b is a form of chlorophyll. Chlorophyll b helps in photosynthesis by absorbing light energy. It is more soluble than chlorophyll a in polar solvents because of its carbonylgroup. Its color is yellow, and it primarily absorbs blue light.

 

Chlorophyll a is a specific form of chlorophyll used in oxygenic photosynthesis. It absorbs most energy from wavelengths of violet-blue and orange-red light.[1] This photosynthetic pigment is essential for photosynthesis in eukaryotes, cyanobacteria and prochlorophytes because of its role as primary electron donor in the electron transport chain

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 Chlorophyll c1 is a form of chlorophyll. It makes a golden or brownish color and is an accessory pigment. It helps the organism gather light and passes a quanta of excitation energy through the light harvesting antennae to the photosynthetic reaction centre. Chlorophyll c is unusual because it does not have an isoprenoid tail, and ring D is not reduced. These features are typical of the other chlorophylls commonly found in algae and plants. Chlorophyll c is found in certain marine algae, such as diatoms and dinoflagellates. (Blankenship, 2002, Molecular Mechanisms of Photosynthesis)

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