ISSN:
1432-2048
Keywords:
Auxin
;
Cell wall pH
;
Growth (roots)
;
Proton flux and growth
;
Root growth
;
Zea
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00552667
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