Journal Article

Growth Conditions Modulate Root-Wave Phenotypes in Arabidopsis

Charles S. Buer, Josette Masle and Geoffrey O. Wasteneys

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 41, issue 10, pages 1164-1170
Published in print October 2000 | ISSN: 0032-0781
Published online October 2000 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/pcp/pcd042
Growth Conditions Modulate Root-Wave Phenotypes in Arabidopsis

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  • Biochemistry
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The cause for the wave-like growth of Arabidopsis thaliana roots on semi-solid medium remains unclear. Researchers have hypothesized a gravity-induced touch-response, circumnutation, or combinations thereof act as the major stimuli. Our data demonstrate that the gaseous environment within the Petri dish can override gravitational effects. Furthermore, we show that medium ion concentrations and gelling polymers modify the wave response. Although the mechanisms driving our wide-ranging wild-type phenotypes are currently unknown, these results are of immediate significance for interpreting genetic and physiological modifications of environmentally and genetically induced characteristics.

Keywords: Key words: Agar — Arabidopsis thaliana — Ethylene — Gellan gum —Gravitropism — Root-wave.; Abbreviations: MS, Murashige and Skoog; NF, Nescofilm; OS, Okada and Shimura; ST, surgical tape.

Journal Article.  2990 words.  Illustrated.

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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