Open AccessAuxin apical control of the auxin polar transport and its oscillation - a suggested cellular transduction mechanism
Author(s) -
Tomasz J. Wodzicki
Publication year - 2014
Publication title -
acta societatis botanicorum poloniae
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 29
eISSN - 2083-9480
pISSN - 0001-6977
DOI - 10.5586/asbp.1993.007
Subject(s) - auxin , apoplast , cytosol , microbiology and biotechnology , polar auxin transport , biology , chemistry , transduction (biophysics) , biochemistry , biophysics , arabidopsis , cell wall , enzyme , gene , mutant
The proposed hypothesis concerns the transduction of auxin molecular signals arriving from the apoplast at the plasma membrane or recognized by the proteineous receptors of the responding cell, to the concentration gradients oscillating in the supracellular space, associated usually with the specific plant growth and differentiation. Acting as an agonist from outside the target cell auxin stimulates in this cell: (1) the liberation of auxin from the cytosolic pool of its conjugates directly into the basipetal efflux; (2) the synthesis of new auxin which restores the cytosolic reserve of auxin conjugates. The functioning of such a system may be effective in a series of processes initiated by the changing concentration of cytosolic calcium. The hypothesis suggests a molecular mechanism for the development and effective operation of the morphogenetic field in the supracellular space of the plant body, such as the field resulting from auxin waves discovered in cambium