Auxin Binding Sites Research Articles

Effect of pH and surface charge on cell uptake of auxin.

THE uptake of the auxin indol-3-yl acetic acid (IAA) into plant cells is of interest not only because this compound is a hormone, but also because its movement across the plasma membrane is probably involved in the polar transport of auxin1. The plasma membrane contains auxin binding sites and may be a primary site of hormone action2.