Stimulation of ATPase activity by auxin is dependent on ATP concentration

✍ Scribed by Günther F. E. Scherer

• Book ID: 104754400
• Publisher: Springer-Verlag
• Year: 1984
• Tongue: English
• Weight: 365 KB
• Volume: 161
• Category: Article
• ISSN: 0032-0935
• DOI: 10.1007/bf00394568

✦ Synopsis

The effect of auxin on membrane-bound ATPase activity was studied in a plasma membrane-enriched fraction from zucchini hypocotyls. The apparent K M of ATPase activity for ATP was decreased in the presence of 10 -6 M auxin so that at very low ATP concentrations the stimulation of ATPase activity was most obvious. The weak auxin analogue, 2,3-dichlorophenoxyacetic acid, stimulated much less than the active auxin 2,4-dichlorophenoxyacetic acid.