Effect of Butyl 2-Hydroxy-3-Butynoate on Sunflower Leaf Photosynthesis and Photorespiration 1

AUTOR(ES)

Doravari, Sudarsanam

RESUMO

Detached leaves and whole plants of sunflower were supplied with butyl 2-hydroxy-3-butynoate (BHB), a competitive inactivator of glycolate oxidase, to evaluate the possibility of inhibiting photorespiration and increasing photosynthetic efficiency. In all treatments in vivo and in vitro, BHB inhibited glycolate oxidase. With partially purified glycolate oxidase from spinach leaves, the apparent Ki for BHB was 13.2 micromolar.

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