rhizoplastn.
/ˈrʌɪzə(ʊ)plast/, U.S. /ˈraɪzəˌplæst/ Microbiology.
In certain protists: a striated fibrillar structure extending from the base of a kinetosome, usually towards the nucleus.
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rhizoplast1902
1902 Jrnl. Royal Microsc. Soc. 460 Dr. S. Prowasek dissents from the view put forward by Dangeard that in Polystoma the flagellum is connected by means of a fibrillar structure, the ‘rhizoplast’, with a granular structure in connection with the nucleus which he calls the ‘condyle’.
1903 Jrnl. Royal Microsc. Soc. 618 The blepharoplast and the ‘rhizoplast’ are very clear in this species.
1915 I. McCulloch in Univ. Calif. Publ. Zool. 16 5 The rhizoplast is a faint line connecting the ‘kinetonucleus’ with the nucleus.
1947 Ann. Rev. Microbiol. 1 8 In the Polymastigina the anteriorly placed blepharoplast is the center of organization. From it originate the flagella, the rhizoplasts, the axostyles, [etc.].
1976 G. M. Edington & H. M. Gilles Pathol. in Tropics (ed. 2) ii. 55 The eccentric spherical nucleus is about 1 μm in diameter and the rod-shaped rhizoplast may or may not be detectable.
2007 Molecular Phylogenetics & Evol. 43 1167/1 The proteromonadids are small flagellates..with one nucleus, a single large mitochondrion with tubular cristae, Golgi apparatus and a fibrillar rhizoplast connecting the basal bodies and nucleus.
This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022).
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