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Deacidification and Malate Decarboxylation

After a period of dark CO 2 fixation resulting in the vacuolar accumulation of malic acid and decreased levels of stored carbohydrate, there is a rapid and marked decrease in stored malic acid when the plants experience light (Fig. 3.6). Malate, once mobilized for subsequent metabolic consumption, may inhibit P-enolpyruvate carboxylase (Ting, 1968) and reduce further carboxylation (Kluge, 1969 Queiroz, 1967 Ting and Osmond, 1973 a, b). It is generally assumed that deacidification occurs because of malate decarboxylation (or oxalacetate decarboxylation) and concomitant release of CO2. [Pg.56]

Studies by Milburn et al. (1968) indicated that in Bryophyllum, pyruvate was high during light deacidification, suggesting malate decarboxylation by malate [Pg.56]


See other pages where Deacidification and Malate Decarboxylation is mentioned: [Pg.56]    [Pg.57]   


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And decarboxylation

And decarboxylative

Deacidification

Malate

Malates

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