Auxin action on proton influx in corn roots and its correlation with growth |
| |
Authors: | Michael L. Evans Timothy J. Mulkey Mary Jo Vesper |
| |
Affiliation: | (1) Department of Botany, Ohio State University, 43210 Columbus, OH, USA;(2) Present address: Department of Biology, University of North Carolina, UNCC Station, 28223 Charlotte, NC, USA |
| |
Abstract: | At concentrations inhibitory to the elongation of corn (Zea mays L.) roots, the auxins, indole-3-acetic acid (IAA) and α-naphthaleneacetic acid (α-NAA), cause an increase in the pH of the bathing medium; this increase occurs with an average latent period shorter than the latent period for the inhibitory effect of these auxins on elongation. Indole-2-carboxylic acid, an inactive structural analogue of IAA, and β-naphthaleneacetic acid, an inactive analogue of α-NAA, affect neither growth nor the pH of the medium. Since acid pH is known to promote and basic pH to inhibit root elongation, the data are consistent with the hypothesis that hormone-induced modification of cell-wall pH plays a role in the control of elongation of roots, as has been proposed for elongation of stems and coleoptiles. |
| |
Keywords: | Auxin Cell wall pH Growth (roots) Proton flux and growth Root growth Zea |
本文献已被 SpringerLink 等数据库收录! |
|