The acropetal effects of indole-3-acetic acid in isolated shoot segments of Acer pseudoplatanus L. I. Growth responses of buds

Jacek A. Adamczyk

Abstract


The subject of this investigation were growth reactions of two opposite lateral buds of Acer pseudoplatanus L. stem sections in response to application of indole-3-acetic acid (IAA) and other synthetic growth regulators below the buds. No effect of IAA upon the initiation of bud growth was noted, however, elongation of new shoots was inhibited. This acropetal effect of auxin was enhanced by simultaneous treatment with triiodobenzoic acid (TIBA) or benzyladenine (BA). TIBA alone caused even stronger retardation of shoot growth. Exactly the opposite effect was produced by gibberellic acid (GA3) applied even 30 cm below the buds. In this case TIBA could reverse the effect of GA3 treatment. The results concerning acropetal effects of auxin suggest that some type of signalling system functions independently of the direct action of the exogenous IAA.

Keywords


bud growth; IAA; acropetal inhibition; correlative growth; Acer pseudoplatanus L.

Full Text:

PDF


DOI: https://doi.org/10.5586/asbp.1991.002

Journal ISSN:
  • 2083-9480 (online)
  • 0001-6977 (print; ceased since 2016)
This is an Open Access journal, which distributes its content under the terms of the Creative Commons Attribution License, which permits redistribution, commercial and non-commercial, provided that the content is properly cited.
The journal is a member of the Committee on Publication Ethics (COPE) and aims to follow the COPE’s principles.
The journal publisher is a member of the Open Access Scholarly Publishers Association.
The journal content is indexed in Similarity Check, the Crossref initiative to prevent scholarly and professional plagiarism.
Publisher
Polish Botanical Society