AGRICULTURE MICROBIOLOGY Lecture Notes - Autotroph, Ribulose, Glyceraldehyde
Document Summary
Overview of autotrophy: imagine being hungry, walking outside, taking off your shirt, lying in the sun for a few hours, becoming totally full (fat even! Use special metabolic cycle: calvin-benson cycle: refers to c-source only; some organisms still require organic c as energy source. Calvin-benson cycle: each co2 is added to a 5-c acceptor molecule (ribulose 1,5 bis-phosphate, immediately split into two 3-c molecules (3-phosphoglyceric acid, must add phosphate group (from atp) and hydrogen (from nadph) to get reduced product, 3 - phospho-glyceraldehyde (pga: cannot take all (pga) as product --- must regenerate some more acceptor to keep cycle going. How: take 5 pga molecules (5 x 3c = 15 c atoms). 3 5 - c molecules (still 15 c atoms). Summary: actual cyce exports 3-c reduced molecules: look at balanced equation: 3 co2 + 9 atp + 6 nadph -----> 3-phospho-glyceraldehyde (pga) + 9 adp + 9. Nadp: often want to look at balanced equation relative to 6c synthesis.
