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Hormonal Modulation of the Oscillatory System Involved in Polar Transport of Auxin
Author(s) -
WODZICKI TOMASZ J.,
WODZICKI ALINA B.,
ZAJACZKOWSKI STEFAN
Publication year - 1979
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1979.tb06539.x
Subject(s) - auxin , biophysics , biology , chemistry , botany , microbiology and biotechnology , biochemistry , gene
The amount of natural auxin collected in agar as a result of basipetal efflux from the cambial region of successive short sections of pine stem varies so that a wave‐like pattern is formed. The wave‐length is several times longer than the cell length in the cambial region, suggesting the existence of a supracellular oscillatory system, which forms a morphogenic field in the stem tissues, The amplitude of the auxin wave is amplified by apical application of IAA to the longer stem sections, particularly at she time of spring initiation of cambial activity. The wave of auxin disappears after simultaneous apical application of IAA and ABA. The modulatory effects of IAA and ABA are translocated along the investigated stem sections faster than known transport velocities of IAA molecules. This fact is considered as evidence of apical control of the morphogenic field by way of influence upon a supracellular system of conjugated oscillators in the tissue.