In this article we will discuss about the mechanism of bacterial photosynthesis. The absorption of light is by a pigment molecule which after absorption delivers the energy to electron carriers that can transduce the energy into chemical form. The function of chlorophyll molecule is absorption of photons. The energy contained in the excited pigments is channelled through light-harvesting pigments (also [...]
In this article we will discuss about:- 1. History of Photosynthetic Bacteria 2. Classification of Photosynthetic Bacteria 3. Metabolism. History of Photosynthetic Bacteria: Before nineteenth century it was considered that the photosynÂthetic machinery is present in purple bacteria because these bacteria showed movement towards light (phototactic) and growth is also induced by light. On the other hand, S. Winogradsky, a [...]
In this article we will discuss about the electron transport system in bacterial photosynthesis. In the phototrophic bacteria, cytochrome a and other type of cytochrome oxidase are not present because photosynthesis takes place under anaerobic conditions and there is no need of interaction with molecular O2. The electron transport system i.e. the mechanism of reduction of NADP to NADPH + [...]