Mechanism of rapid suppression of cell expansion in cucumber hypocotyls after blue-light irradiation

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

Rapid suppression of hypocotyl elongation by blue light in cucumber (Cucumis sativus L.) was studied to examine possible hydraulic and wall changes responsible for diminished growth. Cell-sap osmotic pressure, measured by vaporpressure osmometry, was not decreased by blue light; turgor pressure, measured by the pressureprobe technique, remained constant during the growth inhibition; and stem hydraulic conductance, measured by dynamic and static methods, was likewise unaffected by blue light. Wall yielding properties were assessed by the pressure-block technique for in-vivo stress relaxation. Blue light reduced the initial rate of relaxation by 77%, but had little effect on the final amount of relaxation. The results demonstrate that blue irradiation acts to decrease the wall yielding coefficient, but not the yield threshold. Stress-strain (Instron) analysis showed that irradiation of the seedlings had little effect on the mechanical extensibilities of the isolated wall. The results indicate that blue light can reduce cell-wall loosening without affecting bulk viscoelastic properties, and indicate a chemorheological mechanism of cell-wall expansion.

Original languageEnglish (US)
Pages (from-to)109-116
Number of pages8
JournalPlanta
Volume176
Issue number1
DOIs
StatePublished - Nov 1 1988

Fingerprint

Hypocotyl
Cucumis sativus
blue light
hypocotyls
cucumbers
irradiation
Light
Cell Wall
cells
Osmometry
fluid mechanics
cell walls
Pressure
stress relaxation
extensibility
Osmotic Pressure
turgor
Growth
osmotic pressure
Seedlings

All Science Journal Classification (ASJC) codes

  • Genetics
  • Plant Science

Cite this

@article{262268b85cbf43df8ffc9100680d5f8a,
title = "Mechanism of rapid suppression of cell expansion in cucumber hypocotyls after blue-light irradiation",
abstract = "Rapid suppression of hypocotyl elongation by blue light in cucumber (Cucumis sativus L.) was studied to examine possible hydraulic and wall changes responsible for diminished growth. Cell-sap osmotic pressure, measured by vaporpressure osmometry, was not decreased by blue light; turgor pressure, measured by the pressureprobe technique, remained constant during the growth inhibition; and stem hydraulic conductance, measured by dynamic and static methods, was likewise unaffected by blue light. Wall yielding properties were assessed by the pressure-block technique for in-vivo stress relaxation. Blue light reduced the initial rate of relaxation by 77{\%}, but had little effect on the final amount of relaxation. The results demonstrate that blue irradiation acts to decrease the wall yielding coefficient, but not the yield threshold. Stress-strain (Instron) analysis showed that irradiation of the seedlings had little effect on the mechanical extensibilities of the isolated wall. The results indicate that blue light can reduce cell-wall loosening without affecting bulk viscoelastic properties, and indicate a chemorheological mechanism of cell-wall expansion.",
author = "Cosgrove, {Daniel J.}",
year = "1988",
month = "11",
day = "1",
doi = "10.1007/BF00392486",
language = "English (US)",
volume = "176",
pages = "109--116",
journal = "Planta",
issn = "0032-0935",
publisher = "Springer Verlag",
number = "1",

}

Mechanism of rapid suppression of cell expansion in cucumber hypocotyls after blue-light irradiation. / Cosgrove, Daniel J.

In: Planta, Vol. 176, No. 1, 01.11.1988, p. 109-116.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Mechanism of rapid suppression of cell expansion in cucumber hypocotyls after blue-light irradiation

AU - Cosgrove, Daniel J.

PY - 1988/11/1

Y1 - 1988/11/1

N2 - Rapid suppression of hypocotyl elongation by blue light in cucumber (Cucumis sativus L.) was studied to examine possible hydraulic and wall changes responsible for diminished growth. Cell-sap osmotic pressure, measured by vaporpressure osmometry, was not decreased by blue light; turgor pressure, measured by the pressureprobe technique, remained constant during the growth inhibition; and stem hydraulic conductance, measured by dynamic and static methods, was likewise unaffected by blue light. Wall yielding properties were assessed by the pressure-block technique for in-vivo stress relaxation. Blue light reduced the initial rate of relaxation by 77%, but had little effect on the final amount of relaxation. The results demonstrate that blue irradiation acts to decrease the wall yielding coefficient, but not the yield threshold. Stress-strain (Instron) analysis showed that irradiation of the seedlings had little effect on the mechanical extensibilities of the isolated wall. The results indicate that blue light can reduce cell-wall loosening without affecting bulk viscoelastic properties, and indicate a chemorheological mechanism of cell-wall expansion.

AB - Rapid suppression of hypocotyl elongation by blue light in cucumber (Cucumis sativus L.) was studied to examine possible hydraulic and wall changes responsible for diminished growth. Cell-sap osmotic pressure, measured by vaporpressure osmometry, was not decreased by blue light; turgor pressure, measured by the pressureprobe technique, remained constant during the growth inhibition; and stem hydraulic conductance, measured by dynamic and static methods, was likewise unaffected by blue light. Wall yielding properties were assessed by the pressure-block technique for in-vivo stress relaxation. Blue light reduced the initial rate of relaxation by 77%, but had little effect on the final amount of relaxation. The results demonstrate that blue irradiation acts to decrease the wall yielding coefficient, but not the yield threshold. Stress-strain (Instron) analysis showed that irradiation of the seedlings had little effect on the mechanical extensibilities of the isolated wall. The results indicate that blue light can reduce cell-wall loosening without affecting bulk viscoelastic properties, and indicate a chemorheological mechanism of cell-wall expansion.

UR - http://www.scopus.com/inward/record.url?scp=0024274881&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0024274881&partnerID=8YFLogxK

U2 - 10.1007/BF00392486

DO - 10.1007/BF00392486

M3 - Article

C2 - 11539804

AN - SCOPUS:0024274881

VL - 176

SP - 109

EP - 116

JO - Planta

JF - Planta

SN - 0032-0935

IS - 1

ER -