Question

When analyzing photosynthetic microorganisms in a lake you often find that the photosynthetic microorganisms growing at the very surface are green, while photosynthetic microorganisms growing deeper are often purple. What is the energetic and molecular reasoning for the purple coloring in the lower levels

Answer 1

The photosynthetic microorganisms growing at the very surface are green, while photosynthetic microorganisms growing deeper are often purple because purple bacteria need an anoxic condition.

Purple microbes are anoxygenic phototrophs generally spread in nature, particularly in aquatic environments. Purple microbes are emphatically photoheterotrophs, regardless of whether they are fit for photoautotrophy, they are prepared for living in dull and deeper conditions in the aquatic region on account of the anoxic circumstances that favor the synthesis of their pigments.

In all cases, there is light absorption by a pigment that gets energized by a photon of light. This isolates electrons from a particle coupled to an ETS that is homologous to those of respiratory ETS.

Purple microbes catch light not utilized by other phototrophs. The pinnacle frequency consumed by bacteriochlorophyll P870 lies such a long way into the infrared (800-1,100 nm) that the photon energy is inadequate to lessen NAD(P) to NAD(P)H.

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