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TRANSPORT, BINDING, AND DECARBOXYLATION OF CARBOXYL‐LABELED IAA‐ 14 C IN INTACT PEA ROOTS
Author(s) -
Konings H.,
Gayadin A. P.
Publication year - 1971
Publication title -
acta botanica neerlandica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.871
H-Index - 87
eISSN - 1438-8677
pISSN - 0044-5983
DOI - 10.1111/j.1438-8677.1971.tb00208.x
Subject(s) - auxin , decarboxylation , chemistry , lanolin , biophysics , phloem , pisum , aqueous solution , botany , biochemistry , chromatography , organic chemistry , biology , catalysis , gene
SUMMARY Carboxyl‐labeled IAA‐ 14 C was predominantly transported in the acropetal direction, when applied to intact vertical or horizontal pea roots. The velocity was several cm per hour, suggesting transport in the phloem. A large proportion of the auxin entering the roots became bound. The major part of the IAA‐ 14 C applied to the root surface was decarboxylated. Three methods of auxin application were used, viz. in 1 µl droplets of an aqueous solution, in lanolin paste, and by means of anion‐exchange resin beads.