Hypergravity stimulus enhances primary xylem development and decreases mechanical properties of secondary cell walls in inflorescence stems of Arabidopsis thaliana

Annals of Botany
Izumi NakabayashiSeiichiro Kamisaka

Abstract

The xylem plays an important role in strengthening plant bodies. Past studies on xylem formation in tension woods in poplar and also in clinorotated Prunus tree stems lead to the suggestion that changes in the gravitational conditions affect morphology and mechanical properties of xylem vessels. The aim of this study was to examine effects of hypergravity stimulus on morphology and development of primary xylem vessels and on mechanical properties of isolated secondary wall preparations in inflorescence stems of arabidopsis. Morphology of primary xylem was examined under a light microscope on cross-sections of inflorescence stems of arabidopsis plants, which had been grown for 3-5 d after exposure to hypergravity at 300 g for 24 h. Extensibility of secondary cell wall preparation, isolated from inflorescence stems by enzyme digestion of primary cell wall components (mainly composed of metaxylem elements), was examined. Plants were treated with gadolinium chloride, a blocker of mechanoreceptors, to test the involvement of mechanoreceptors in the responses to hypergravity. Number of metaxylem elements per xylem, apparent thickness of the secondary thickenings, and cross-section area of metaxylem elements in inflorescence stems inc...Continue Reading

References

Jan 1, 1969·Journal of Ultrastructure Research·A R Spurr
Jan 1, 1993·The Plant Journal : for Cell and Molecular Biology·J P Ding, B G Pickard
Jan 1, 1996·Advances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)·E M Nedukha
Apr 1, 1996·Journal of Experimental Botany·T HosonY Masuda
Jan 1, 1984·Annals of Botany·J R CowlesC Peterson
Oct 13, 2001·Advances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)·K SogaS Kamisaka
Nov 17, 2001·Advances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)·T NakamuraM Yamada
Mar 20, 2003·Plant Physiology·Guichuan HouElison B Blancaflor
Apr 26, 2003·The Plant Journal : for Cell and Molecular Biology·Sara Andersson-GunneråsBjörn Sundberg
Dec 23, 2003·Advances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)·K SogaT Hoson
Jun 3, 2004·Uchū Seibutsu Kagaku·Emi YoneyamaTeruko Nakamura

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Citations

Feb 7, 2008·Annals of Botany·Veronica de MiccoKatia Ruel
Jun 5, 2013·Journal of Plant Research·Kouichi Soga

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