| 单词 |
kinetoplast |
| 释义 |
kinetoplast Biol.|kaɪˈniːtəʊplɑːst, -æ-|
[ad. F. kinétoplaste (A. Alexeieff 1917, in Compt. Rend. hebd. d. Séances et Mém. de la Soc. de Biol. LXXX. 512): see kineto- and -plast.]
a. A structure lying close to a kinetosome in some protozoa, esp. trypanosomes.
b. This structure together with the kinetosome; now rare or Obs.
1925Manson's Trop. Dis. (ed. 8) 636 This composite body is known as the kinetoplast, and is composed of a minute blepharoplast, or basal body, and a parabasal body. 1938Trans. R. Soc. Trop. Med. & Hygiene XXXII. 333 In referring to the prominent dark-staining structure at the base of the flagellum in trypanosomes I have at one time used the term parabasal, later changing to kinetonucleus, while the name kinetoplast has been employed to denote the complex kinetonucleus (or parabasal) + blepharoplast (or basal granule)... While the conception of the nuclear nature of this element (hence ‘kinetonucleus’) has been discarded long ago, considerable doubt has also been thrown on its interpretation as a parabasal body... In the present paper the term kinetoplast has accordingly been employed in its original sense, to denote the kinetonucleus alone (without the blepharoplast). 1961Mackinnon & Hawes Introd. Study Protozoa ii. 101 In the Trypanosomidae and some other protomonads..there is a body lying near the blepharoplast which..is generally well preserved by acetic acid fixatives like Bouin; it is F +; it is self-perpetuating, divides when the blepharoplast divides, and one of its daughters goes to each product of fission... To it the name kinetoplast is applied... The term parabasal body (unfortunately applied at times to the structure just defined as a kinetoplast) is here reserved for an organelle best seen in the Trichomonadida... It is more complex than the kinetoplast, usually compound, F -, and rarely if ever completely preserved except by ‘cytological’ fixatives. It is not self-reproducing. 1971New Scientist 13 May 370 Certain single-celled organisms are propelled forwards in the water by flagellae, which draw their power from a single huge mitochondrion called a kinetoplast. |
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