Choline conjugates of auxins. I. Direct evidence for the hydrolysis of choline-auxin conjugates by pea cholinesterase

We synthesized the choline conjugates of three derivatives of phenylacetic acid, four derivatives of phenoxyacetic acid, and of naphthalene-1-acetic acid and measured the effects of these conjugates on pea ( Pisum sativum L. cv. Alaska) stem segment elongation. We also synthesized the thioester anal...

Full description

Saved in:
Bibliographic Details
Published in:Plant physiology and biochemistry 2000, Vol.38 (4), p.301-308
Main Authors: Fluck, Richard A., Leber, Phyllis A., Lieser, John D., Szczerbicki, Sandra K., Varnes, Jeffrey G., Vitale, Melissa A., Wolfe, Erin E.
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
AUXINAS
AUXINE
AUXINS
Biological and medical sciences
CHOLINE
CHOLINESTERASE
COLINA
COLINESTERASA
Economic plant physiology
ESTER
ESTERES
ESTERS
Fundamental and applied biological sciences. Psychology
Growth and development
Growth regulators
Metabolism
PISUM SATIVUM
Plant physiology and development
PLANTAS PROTEAGINOSAS
PLANTE PROTEAGINEUSE
PROTEIN PLANTS
thiocholine esters
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We synthesized the choline conjugates of three derivatives of phenylacetic acid, four derivatives of phenoxyacetic acid, and of naphthalene-1-acetic acid and measured the effects of these conjugates on pea ( Pisum sativum L. cv. Alaska) stem segment elongation. We also synthesized the thioester analogs of six choline conjugates and measured their rates of hydrolysis by pea cholinesterase and their rates of spontaneous hydrolysis. With one exception, conjugates that stimulated growth were hydrolyzed at high rates by pea cholinesterase, while conjugates that were hydrolyzed at low rates by pea cholinesterase did not stimulate growth. The results are consistent with a model in which cholinesterase releases active auxins from these conjugates.
ISSN:0981-9428
1873-2690
DOI:10.1016/S0981-9428(00)00742-7