The effect of auxin on stress relaxation in isolated Avena coleoptiles.

Abstract:

:In order to characterize further the mechanical properties of coleoptile cell walls, stress relaxation measurements were made on methanol-boiled sections of Avena coleoptiles. Relaxation was measured both in mechanically conditioned specimens and in specimens which had not been previously extended. In both cases the relaxation was proportional to log time. Mechanical conditioning increased the relaxation modules and decreased the relative rate of relaxation. In contrast, pretreatment of the live coleoptiles with indoleacetic acid reduced the relaxation modulus and the absolute rate of relaxation but did not affect the relative rate of relaxation. Essentially similar pictures of the mechanical properties of coleoptile walls are obtained from stress relaxation and creep tests; the wall behaves as a nonlinear viscoelastic material.

journal_name

Plant Physiol

journal_title

Plant physiology

authors

Cleland R,Haughton PM

doi

10.1104/pp.47.6.812

subject

Has Abstract

pub_date

1971-06-01 00:00:00

pages

812-5

issue

6

eissn

0032-0889

issn

1532-2548

journal_volume

47

pub_type

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