Growth conditions modulate root-wave phenotypes in Arabidopsis

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...

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Bibliographic Details
Published in:Plant and cell physiology 2000-10, Vol.41 (10), p.1164-1170
Main Authors: Buer, C.S. (Australian National Univ., Canberra (Australia)), Masle, J, Wasteneys, G.O
Format: Article
Language:English
Subjects:
Arabidopsis - growth & development
ARABIDOPSIS THALIANA
ETHYLENE
Gravitropism
GRAVITY
GROWTH
Key words: Agar — Arabidopsis thaliana — Ethylene — Gellan gum —Gravitropism — Root-wave
LABORATORY EXPERIMENTATION
Murashige and Skoog
Nescofilm
Okada and Shimura
Phenotype
PHENOTYPES
PLANT HABIT
Plant Roots
ROOTS
Space life sciences
STIMULI
surgical tape
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Summary: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.
ISSN:0032-0781
1471-9053
DOI:10.1093/pcp/pcd042