Respiration and photosynthesis

david alan walker alan2351 at
Wed Nov 12 12:12:52 EST 2003

There was once a proposal that "dark respiration" (i.e TCA cycle) was shut
down in the light. Tracer studies

GRAHAM D, DA WALKER 1962 Some effects of light on the interconversion of
metabolites in green leaves.  Biochem J 82: 554-560

showed this not to be the case. Naturally an illuminated leaf will fix CO2
from whatever source. Carbon dioxide compensation points (cf C3 with C4) are
relevant to this question.

David Walker


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