Indole-3-acetic Acid Oxidase from Peas: I. Occurrence and Distribution of Peroxidative and Nonperoxidative Forms 1
AUTOR(ES)
Bryant, Stephen D.
RESUMO
Tissues of etiolated pea seedlings variety Alaska were examined for the presence of peroxidative and nonperoxidative forms of indoleacetic acid (IAA) oxidase. Enzymes were extracted in a sequence involving acetone powder preparation from pea tissues, buffer extraction of the powder, ammonium sulfate precipitation, dialysis, lyophilization, and acrylamide gel electrophoresis. Electrophoretically separable proteins were assayed for IAA oxidase activity with the Salkowski test, and peroxidase activity was based on the color reaction with benzidine and H2O2. Each tissue examined contained several nonperoxidative IAA oxidases. No tissue contained more than three peroxidative IAA oxidases, whereas the plumule hooks (a tissue with a high IAA oxidase activity) contained no detectable peroxidases. The results indicate that nonperoxidative IAA oxidases might play a major role in the regulation of IAA content in pea seedlings.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=542899Documentos Relacionados
- The Indole-3-Acetic Acid Oxidase of Lupinus albus L1
- Esters of Indole-3-Acetic Acid from Avena Seeds 1
- Enzymatic Formation of Indole-3-Carboxaldehyde from Indole-3-Acetic Acid. 12
- Metabolism of Indole-3-Acetic Acid in Arabidopsis1
- Occurrence of enzymes involved in biosynthesis of indole-3-acetic acid from indole-3-acetonitrile in plant-associated bacteria, Agrobacterium and Rhizobium.
