Inhibition of the. beta. -carboxylation pathway of CO/sub 2/ fixation by bisulfite compounds. [Leaves of Sedum praealtum and Atriplex spongiosa were used]

Journal Article · Thu Jan 01 00:00:00 EST 1970 · Plant Physiol.; (United States)

OSTI ID:5523348

Osmond, C B; Avadhani, P N

Bisulfite compounds are well known as inhibitors of glycolate oxidase in green tissues of higher plants. In an effort to understand the relation between low glycolate oxidase activity and high P-enolpyruvate carboxylase activity in plants with the C/sub 4/ dicarboxylic acid pathway of photosynthesis, the authors have treated leaves of related species of Atriplex with these compounds. In this photosynthetic process, as well as during dark CO/sub 2/ fixation leading to acidification of Sedum leaves, they have found bisulfite compounds to be effective inhibitors of the P-enolpyruvate carboxylation system. This report provides evidence in vivo for this inhibition and describes the inhibition in vitro of P-enolpyruvate carboxylation system. This report provides evidence in vivo for this inhibition and describes the inhibition in vitro of P-enolpyruvate carboxylase and NADH malate dehydrogenase. 16 references, 4 figures, 1 table.

• Research Organization: Australian National Univ., Canberra City
• OSTI ID: 5523348
• Journal Information: Plant Physiol.; (United States), Vol. 45
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
CARBON DIOXIDE FIXATION
BIOLOGICAL PATHWAYS
CARBOXYLASE
ENZYME ACTIVITY
OXIDOREDUCTASES
PHOTOSYNTHESIS
BIOCHEMICAL REACTION KINETICS
CARBOXYLATION
CARBOXYLIC ACIDS
ENZYME INHIBITORS
PLANTS
SULFITES
CHEMICAL REACTIONS
ENZYMES
KINETICS
LIGASES
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
REACTION KINETICS
SULFUR COMPOUNDS
SYNTHESIS
520200* - Environment
Aquatic- Chemicals Monitoring & Transport- (-1989)