Photoautotroph | Wikipedia audio article
Channel: wikipedia tts
Date: 30/10/2018

This is an audio version of the Wikipedia Article:
Photoautotroph

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SUMMARY
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Phototrophs (Gr: φῶς, φωτός = light, τροϕή = nourishment) are the organisms that carry out photon capture to acquire energy.  They use the energy from light to carry out various cellular metabolic processes.  It is a common misconception that phototrophs are obligatorily photosynthetic.  Many, but not all, phototrophs often photosynthesize: they anabolically convert carbon dioxide into organic material to be utilized structurally, functionally, or as a source for later catabolic processes (e.g. in the form of starches, sugars and fats).  All phototrophs either use electron transport chains or direct proton pumping to establish an electro-chemical gradient which is utilized by ATP synthase, to provide the molecular energy currency for the cell. 
Phototrophs can be either autotrophs or heterotrophs. As their electron and hydrogen donors are inorganic compounds [Na2S2O3 (PSB) and H2S (GSB)] they can be also called as lithotrophs, and so, some photoautotrophs are also called photolithoautotrophs. Examples of phototroph organisms:  Rhodobacter capsulatus, Chromatium, Chlorobium etc.