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Titolo:
The ultrastructure of contractile tubules in the heliozoon Actinophrys soland their possible involvement in rapid axopodial contraction
Autore:
Kinoshita, E; Shigenaka, Y; Suzaki, T;
Indirizzi:
Kobe Univ, Fac Sci, Dept Biol, Lab Protistol, Kobe, Hyogo 6578501, Japan Kobe Univ Kobe Hyogo Japan 6578501 Protistol, Kobe, Hyogo 6578501, Japan Hiroshima Univ, Fac Med, Dept Physiol, Minami Ku, Hiroshima 7348511, JapanHiroshima Univ Hiroshima Japan 7348511 nami Ku, Hiroshima 7348511, Japan Hiroshima Univ, Fac Integrated Arts & Sci, Higashihiroshima 7398511, JapanHiroshima Univ Higashihiroshima Japan 7398511 hihiroshima 7398511, Japan
Titolo Testata:
JOURNAL OF EUKARYOTIC MICROBIOLOGY
fascicolo: 5, volume: 48, anno: 2001,
pagine: 519 - 526
SICI:
1066-5234(200109/10)48:5<519:TUOCTI>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
FOOD CAPTURE; ECHINOSPHAERIUM; CYTOSKELETON;
Keywords:
axopodium; Ca2+-contraction; colchicine; electron microscopy;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Suzaki, T Kobe Univ, Fac Sci, Dept Biol, Lab Protistol, Kobe, Hyogo 6578501, Japan Kobe Univ Kobe Hyogo Japan 6578501 , Kobe, Hyogo 6578501, Japan
Citazione:
E. Kinoshita et al., "The ultrastructure of contractile tubules in the heliozoon Actinophrys soland their possible involvement in rapid axopodial contraction", J EUKAR MIC, 48(5), 2001, pp. 519-526

Abstract

We employed an improved fixation procedure for electron microscopy using ruthenium red, and found a bundle of contractile tubules inside the axopodiaof the heliozoon Actinophrys sol. Upon food uptake, the tubules shorten and transform into a mass of small granules when rapid axopodial contraction occurs, suggesting that these structures are involved in the process of axopodial contraction. The relationship between transformation of the contractile tubules and accompanying disassembly of the axonemal microtubules was studied by examining the ultrastructure of the contractile tubules after disassembly of the microtubules was artificially induced by cold or colchicinetreatment. Granulation of the contractile tubules was induced by cold but not by colchicine, treatment. During recovery from cold treatment, granularforms of the contractile tubules became re-elongated and their initial tubular appearance was restored. These results suggest that the contractile tubules in heliozoon axopodia play a role in repetitive cytoplasmic contraction.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 12:17:08