BIOL 371 Lecture Notes - Lecture 10: Green Sulfur Bacteria, Anoxygenic Photosynthesis, Purple Bacteria
Document Summary
Biol 371 lecture 10 metabolic diversity: phototrophs. Photoautotrophy requires two distinct sets of reactions operating in parallel: atp production (e source, co2 reduction to cellular materia (e for co2 reduction come from nadh/nadph) In purple or green bacteria: same mechanism, the only difference is the source of the reducing power. they can"t use water as e donor, the use reduced sulfur compounds. Impressive morphological diversity: chroococcales: unicellular (divide by binary fission, pleurocapsales: unicellular (divide by multiple fission, nostocales: filamentous (no heterocysts, oscillatoriales: filamentous (no heterocysts, stigonematales: branching filamentous. Have type i and type ii photosystems. All species fix co2 by the calvin cycle. All species have specialized membranes called thylakoids (invagination of cytoplasmic membrane, site at which photosynthesis occurs increase the ability of cells to harvest light e) Somemorphological classifications correspond to phylogenetic groups; others do. Not: therefore morphology is not a perfect predictor of evolutionary relationships.
