Cyanobacteria and Prochlorophyta

Cyanobacteria and Prochlorophyta

Cyanobacteria and Prochlorophyta - These two groups have characteristics common with eukaryotic phototrophs.

(i) They have oxygenic photosynthesis, i. e. photosynthesis in which there is evolution of oxygen

(ii) Water is the electron donor in photosynthesis and oxygen the final product of oxidation.

(iii) There are two linked photo systems, PS I and PS II.

(iv) Chlorophyll a is one of the photosynthetic pigments.

In these respects the Cyanobacteria and Prochlorophyta differ from the purple and green bacteria which have
(i) anoxygenic photosynthesis,

(ii) reduced sulphur compounds, sulphur, molecular hydrogen or simple organic compounds as electron donors,

(iii) Only, one photosystem and

(iv) bacteriochlorophylls as their photosynthetic pigments.

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