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Is indolyl‐3‐acetic acid involved in the wave‐like pattern of auxin efflux from Pinus sylvestris stem segments?
Author(s) -
Wodzicki Tomasz J.,
Knegt Erik,
Wodzicki Alina B.,
Bruinsma Johan
Publication year - 1984
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.1399-3054.1984.tb05898.x
Subject(s) - auxin , coleoptile , botany , bioassay , acetic acid , biology , agar , pinus <genus> , chemistry , biochemistry , gene , bacteria , genetics
The coleoptile curvature bioassay of agar diffusates from successive cambial‐region sections of Pinus silvestris L. stem tissue reveals the existence of a wave‐like pattern, possibly of auxin translocation. Spectrofluorometric determinations of indolyl‐3‐acetic acid (IAA) in these diffusates gave only a poor correlation. Probably another phytohormone, also an auxin, plays a more important role in the pattern. The amplification in the amplitude of the pattern, brought about by apically applied IAA, cannot be induced by the synthetic auxin, 2,4‐dichlorophenoxyacetic acid.