| 释义 |
plasmagene Genetics.|ˈplæzmədʒiːn|
[f. plasma + gene.]
A supposed cytoplasmic entity having genetic properties.
1939C. D. Darlington Evol. Genetic Systems xx. 121 The particles in the nucleus are genes; those in the plastids and cytoplasm may perhaps be treated more rigorously if we also think of them as genes—plastogenes and plasmagenes. 1952[see plasmid]. 1963E. Mayr Animal Species & Evolution vii. 172 Like the chromosomal genes, plasmagenes seem to consist of nucleic acid molecules (including possibly RNA). 1965Stern & Nanney Biol. of Cells xix. 529 The concept of the plasmagene, a gene-like cytoplasmic element capable of differential assortment and replication during development, provided a possible means of rationalization... Nevertheless, this interpretation was never generally accepted with enthusiasm. Ibid., The episomes of bacteria..on occasion behave like plasmagenes. 1974A. T. Soldo in W. J. Van Wagtendonk Paramecium 377 When kappa particles were first discovered they were generally regarded as cytoplasmic units of hereditary or ‘plasma⁓genes’.
Hence plasmaˈgenic a., of, pertaining to, or being a plasmagene.
1950Heredity IV. 17 The existence of plasmagenic sub⁓units in any one of the self-duplicating, cytoplasmic structures has not yet been established. 1968J. A. Serra Mod. Genetics III. xix. 37 Probably infection is produced by a particle of the plasmagenic type. |