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On the Question of Stem Polarity with Respect to Auxin Transport
Author(s) -
ZAJACZKOWSKI STEFAN,
WODZICKI TOMASZ J.
Publication year - 1978
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.1399-3054.1978.tb01625.x
Subject(s) - polarity (international relations) , auxin , polar auxin transport , coleoptile , gravitropism , biology , microbiology and biotechnology , botany , biophysics , chemistry , biochemistry , cell , arabidopsis , mutant , gene
The effect of section length and number of longitudinally contiguous cells upon polar transport of natural auxin from the pine stem cambial region was investigated with oat coleoptile curvature tests. Basipetal and acropetal efflux of auxin to agar declines with increasing length of the sections, but the polarity quotient varies little and is similar to the polarity of individual cells. An integrated system of cells produces a wave along the stem in the efflux of auxin from consecutive segments. The possible role of such waves in development of polarity gradients and of the morphogenic maps of orientation of cells in the stem cambial region is discussed.