The fine structure of the flagellar apparatus in Trichonympha

Pitelka, Dorothy R.; Schooley, Caroline

doi:10.1002/jmor.1051020202

Cited by 28 publications

(25 citation statements)

References 25 publications

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“…According to Kirby, these movements are effected solely by the flagella, bending resulting from the activity of the flagella on only one side of the rostrum at a time. The evidence for this view is not entirely conclusive, trot it is noteworthy that the electron microscope has so far failed to reveal myonemes in Trichonymptza (22,36). If the flagella are indeed responsible for these movements a considerable degree of coordination between them is implied.…”

Section: (This May Also Occur Inmentioning

confidence: 98%

“…The papers of Kirby (29,30) provide detailed descriptions of Trichonympha, based on light microscopy, and many features of the fine structure of the flagellar apparatus in this genus have already been described by Pitelka and Schooley (36). However, although it involves repetition, in order to present an intelligible account of our new observations it is necessary to begin with a brief description of the whole organism and the gross organisation of its flagellar system.…”

Section: Trichonympha and Pseudotrichonymphamentioning

confidence: 99%

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On Flagellar Structure in Certain Flagellates

Gibbons

Grimstone

1960

The Journal of Cell Biology

709

368

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This paper describes the structure of the flagella, basal bodies, and some of the associated fibre systems in three genera of complex flagellates, Trichonympha, Pseudotrichonympha, and Holomastigotoides.Three groups of longitudinal fibres occur in a flagellum: two central and nine outer fibres such as have been repeatedly described in other material, and an additional set of nine smaller secondary fibres not previously identified as such. Each central fibre shows a helical substructure; the pair of them are enveloped in a common sheath. Each outer fibre is a doublet with one subfibre bearing projections--called arms--that extend toward the adjacent outer fibre.The basal body is formed by a cylinder of nine triplet outer fibres. Two subfibres of each triplet continue into the flagellum and constitute the doublets. The third subfibre terminates at the transition of basal body to flagellum, possibly giving rise to the nine radial transitional fibres that seem to attach the end of the basal body to the surface of the organism. The central and secondary flagellar fibres are not present in the lumen of the basal body, but other complex structures occur there. The form of these intraluminal structures differs from genus to genus.The flagellar unit is highly asymmetrical. All the flagella examined have possessed the same one of the two possible enantiomorphic forms.At least two systems of fibres are associated with the basal bodies of all three genera. This paper is an a t t e m p t to describe the fine structure of the flagella, basal bodies, and some of the associated fibre systems in three genera of complex flagellates, Trichonympha, Pseudotrichonympha, and Holomastigotoides. These protozoa, as will be apparent, constitute exceptionally favourable material for the analysis of flagellar structure. By embedding in epoxy-resin and staining with heavy metals it has been possible to obtain excellent preservation of structural detail,

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Section: (This May Also Occur Inmentioning

confidence: 98%

Section: Trichonympha and Pseudotrichonymphamentioning

confidence: 99%

On Flagellar Structure in Certain Flagellates

Gibbons

Grimstone

1960

The Journal of Cell Biology

709

368

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“…Chez les ZooflagellCs, on constate, avec l'existence d'un complexe centrobldpharoplastique, la diffkrenciation plus ou moins accusCe de corps d'origine commune, et demeurant intimement liCs par des desmoses, mais dont l'un conserve les fonctions proprement centrosomiennes au moment de la division nucldaire, les autres Ctant 488 E. FAURJLFREMIET essentiellement des cinktosomes flagellifkres (voir Kirby, 1944a; GrassC, 1952,1956a,b; Pitelka et Schooley, 1958;etc.). Dans ces cas, certains organites fibreux intracytoplasmiques dipendant du complexe centroblCpharoplastique, tels que l'axostyle, sont directement lids, structuralement comme gCnCtiquement, au centrosome et non pas aux cinkosomes.…”

Section: Fibres Cine'tosomiennes Intracytoplasmipues (A) Diflandents Asunclassified

“…Fig. 13 Chez quelques FlagellCs tels que Synura (Manton, 1955), Trichomonas muris (Anderson, 1955)~ Chromulina psammobia (Rouiller et FaurC-Fremiet, 1958 b), le corps de Golgi est adjacent h l'ensemble centro-rhizo-cinCtosomien ; chez d'autres, telsJoenia annectens et Foaina grassii (Grasst, 1956~2, b) ou diverses espkces de Trichonympha (Pitelka et Schooley, 1958; Grimstone, 1958Grimstone, , 1959 Hypermastigines.…”

Section: Organites Associks D La Cinktide ( a ) Vksicules Adventices unclassified

Cils Vibratiles Et Flagelles

1961

Biological Reviews

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“…The period varies between 130 and 250 A in Naegleria [Simpson and Dingle, 1971] and, in Trichonynpha, between 300 and 600 A [Pitelka and Schooley, 1958]. Might this mean that they had been surprised at different moments in an hypothetical contraction of the striated ciliary roots?…”

Section: Molecular Basis O F the Transmission O F The Ciliary Movemenmentioning

confidence: 99%

Ultrastructural Basis of the Coordination of Ciliary Movement

Santander¹,

Cuadrado²,

Sáez³

et al. 1984

Cells Tissues Organs

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A hypothesis for contraction was suggested (molecular basis of the transmission of ciliary coordination) by means of the slipping and interdigitation of the microfilaments of one period with those of the adjacent periods, occurring at the level of the periodic band. The amplitude of the period is greater in the relaxed than in the contracted state, while the reverse is true with the periodic band amplitude. The microfilament length is constant, probably varying with the species. This hypothesis of the slipping and interdigitation of the microfilaments would be the basis of the ciliary coordination from cilium to cilium and from cell to cell, because of the anchoring of the bunches in the peribasal complexes and in the adherent connection complexes, respectively.

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The fine structure of the flagellar apparatus in Trichonympha

Cited by 28 publications

References 25 publications

On Flagellar Structure in Certain Flagellates

On Flagellar Structure in Certain Flagellates

Cils Vibratiles Et Flagelles

Ultrastructural Basis of the Coordination of Ciliary Movement

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