Metabolism of Tryptophan, Indole-3-acetic Acid, and Related Compounds in Parasitic Plants from the Genus Orobanche
AUTOR(ES)
Magnus, Volker
RESUMO
Metabolic reactions involving the aliphatic side chain of tryptophan were studied in the holoparasitic dicotyledonous plants Orobanche gracilis Sm., O. lutea Baumg., and O. ramosa L. Unlike known autotrophic plants, the parasite metabolized l-tryptophan directly to indole-3-carboxaldehyde, which was further converted to indole-3-methanol and indole-3-carboxylic acid. Independently, these metabolites were also formed from d-tryptophan, tryptamine, indole-3-lactic acid, and indole-3-acetic acid. As in autotrophic plants, tryptophan and tryptamine were also converted, via indole-3-acetaldehyde, to indole-3-acetic acid, indole-3-ethanol, and its glucoside. The branch of tryptophan metabolism relevant to auxin biogenesis and catabolism is, therefore, not rudimentary in Orobanche but even more complex than in autotrophic higher plants.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=426317Documentos Relacionados
- Transport of the Two Natural Auxins, Indole-3-Butyric Acid and Indole-3-Acetic Acid, in Arabidopsis1
- Tryptophan Biosynthesis from Indole-3-Acetic Acid by Anaerobic Bacteria from the Rumen
- Metabolism of Indole-3-Acetic Acid in Arabidopsis1
- Concentration of Indole-3-acetic Acid and Its Derivatives in Plants 1
- CARBOHYDRATES OF BEAN PLANTS AFTER TREATMENT WITH INDOLE-3-ACETIC ACID