Titre du document / Document title
Evaluation of the three-dimensional clinostat as a simulator of weightlessness
Auteur(s) / Author(s)
HOSON T.
(1) ;
KAMISAKA S.
(1) ;
MASUDA Y.
(2) ;
YAMASHITA M.
(3) ;
BUCHEN B.
(4) ;
Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)
(1) Department of Biology, Faculty of Science, Osaka City University, Sumiyoshi-ku, Osaka 558, JAPON
(2) Tezukayama College, Nara 631, JAPON
(3) Institute of Space and Astronautical Science, Yoshinodai, Sagamihara 229, JAPON
(4) Botanisches Institut, Rheinische Friedrich-Wilhelms-Universität Bonn, Venusbergweg 22, 53115 Bonn, ALLEMAGNE
Résumé / Abstract
Concerns regarding the reliability of slow-and fast-rotating uni-axial clinostats in simulating weightlessness have induced the construction of devices considered to simulate weightlessness more adequately. A new three-dimensional (3-D) clinostat equipped with two rotation axes placed at right angles has been constructed. In the clinostat, the rotation achieved with two motors is computer-controlled and monitored with encoders attached to the motors. By rotating plants three-dimensionally at random rates on the clinostat, their dynamic stimulation by gravity in every direction can be eliminated. Some of the vegetative growth phases of plants dependent on the gravity vector, such as morphogenesis, are shown to be influenced by rotation on the 3-D clinostat. The validity of 3-D clinostatting has been evaluated by comparing structural parameters of cress roots and Chara rhizoids obtained under real microgravity with those obtained after 3-D clinostatting. The parameters analyzed up to now (organization of the root cap, integrity and polarity of statocytes, dislocation of statoliths, amount of starch and ER) demonstrate that the 3-D clinostat is a valuable device for simulating weightlessness.
Revue / Journal Title
Planta
ISSN 0032-0935
CODEN PLANAB
Source / Source
Congrès
Plant Biology in Space. International Workshop, Bad Honnef-Bonn
, ALLEMAGNE
(24/06/1996)
1997, vol. 203, SUP1 (221 p.) (1 p.3/4), pp. S187-S197
Langue / Language
Anglais
Editeur / Publisher
Springer, Berlin, ALLEMAGNE
(1925)
(Revue)
Mots-clés anglais / English Keywords
Simulation ;
Weightlessness ;
Instrumentation ;
Rotation ;
Gravitropism ;
Microgravity ;
Growth ;
Ultrastructure ;
Statolith ;
Lepidium ;
Cruciferae ;
Dicotyledones ;
Angiospermae ;
Spermatophyta ;
Charophycophyta ;
Algae ;
Thallophyta ;
Mots-clés français / French Keywords
Simulation ;
Apesanteur ;
Appareillage ;
Rotation ;
Gravitropisme ;
Microgravité ;
Croissance ;
Ultrastructure ;
Statolithe ;
Lepidium ;
Clinostat 3D ;
Statocyte ;
Chara ;
Cruciferae ;
Dicotyledones ;
Angiospermae ;
Spermatophyta ;
Charophycophyta ;
Algae ;
Thallophyta ;
Mots-clés espagnols / Spanish Keywords
Simulación ;
Ingravidez ;
Instrumentación ;
Rotación ;
Gravítropismo ;
Microgravidez ;
Crecimiento ;
Ultraestructura ;
Estatolito ;
Lepidium ;
Cruciferae ;
Dicotyledones ;
Angiospermae ;
Spermatophyta ;
Charophycophyta ;
Algae ;
Thallophyta ;
Localisation / Location
INIST-CNRS, Cote INIST : 916, 35400006890785.0230
Nº notice refdoc (ud4) : 2798986
