| 单词 | germ plasm |
| 释义 | > as lemmasgerm plasm germ plasm n. [after German Keimplasma ( A. Weismann Über die Vererbung (1883) 15)] (a) the physical substance responsible for the transfer of inherited traits from one generation to the next; genetic material (later identified as DNA); †a unit of this (obsolete); (b) plant or animal material collected to serve as a gene bank. ΘΚΠ the world > life > biology > biological processes > procreation or reproduction > reproductive substances or cells > [noun] > germ cell or mass > germ plasm germ plasm1885 germ plasma1885 1885 Nature 17 Dec. 155/1 It is pointed out that the germ-cells on it appear no longer as a product of the body, at least as far as their essential part, the germ-plasm, is concerned. 1893 W. N. Parker & H. Rönnfeldt tr. A. Weismann Germ-plasm i. i. 62 We are led to the assumption of groups..composed of determinants, which in their turn are made up of biophors. These are the units which I formulated..long ago, and to which the name of ancestral germ-plasms was then given. 1956 J. G. Moseman Eval. Varieties & Select. Barley 1 In recent years the collection has served as a reservoir of germ plasm to aid in meeting problems that arise in barley production. 1990 Sci. Amer. June 78/2 Yet in addition to diversification, germ plasm (seeds, root stocks and pollen) from traditional crops and their wild relatives must be collected and preserved continually. 2002 S. J. Gould Struct. Evolutionary Theory iii. 201 Lamarckian inheritance becomes structurally impossible because acquired somatic adaptations cannot affect the protected germ plasm. < as lemmas |
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