英语词汇“central cell”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

central cell n. [originally after German Centralzelle (1851 in the work translated in quot. 1852; now Zentralzelle)] Botany (a) (in cryptogams and gymnosperms) the cell in the archegonium which gives rise to the oosphere (egg cell) and the ventral canal cell; (also) a corresponding cell in the antheridium; (b) (in angiosperms) the large cell in the centre of the female gametophyte (embryo sac) which contains the polar nuclei and after its fertilization gives rise to the endosperm.

ΚΠ

1852 A. Henfrey tr. W. Hofmeister in Rep. Brit. Assoc. Advancem. Sci. 1851 122 In the central cell of the archegonium, in consequence of a fertilization through the spermatozoids emitted from the antheridia, becomes developed the second generation, destined to produce spores.

1923 Botanisk Tidsskrift 38 81 The author states that the formation of endosperm occurs according to the successive type, the central cell of the embryo sac being at first divided into two cells by a transversal wall.

a1933 J. W. Moll Phytogr. as Fine Art (1934) 202 Fertilisation by means of fusion with the generative cells of the pollen-tube takes place not only with the egg-cell, but also with the large central cell.

1969 Bot. Rev. 35 93 The DNA can be demonstrated in the central cell [in Pinus sylvestris and P. nigra] just before its division to form the ventral canal and the egg cell.

2012 New Phytologist 195 291/2 The pollen tube delivers two sperm cells to the female gametophyte, one of which fuses with the egg cell and one of which fuses with the central cell.

单词	central cell
释义	> as lemmas central cell central cell n. [originally after German Centralzelle (1851 in the work translated in quot. 1852; now Zentralzelle)] Botany (a) (in cryptogams and gymnosperms) the cell in the archegonium which gives rise to the oosphere (egg cell) and the ventral canal cell; (also) a corresponding cell in the antheridium; (b) (in angiosperms) the large cell in the centre of the female gametophyte (embryo sac) which contains the polar nuclei and after its fertilization gives rise to the endosperm. ΚΠ 1852 A. Henfrey tr. W. Hofmeister in Rep. Brit. Assoc. Advancem. Sci. 1851 122 In the central cell of the archegonium, in consequence of a fertilization through the spermatozoids emitted from the antheridia, becomes developed the second generation, destined to produce spores. 1923 Botanisk Tidsskrift 38 81 The author states that the formation of endosperm occurs according to the successive type, the central cell of the embryo sac being at first divided into two cells by a transversal wall. a1933 J. W. Moll Phytogr. as Fine Art (1934) 202 Fertilisation by means of fusion with the generative cells of the pollen-tube takes place not only with the egg-cell, but also with the large central cell. 1969 Bot. Rev. 35 93 The DNA can be demonstrated in the central cell [in Pinus sylvestris and P. nigra] just before its division to form the ventral canal and the egg cell. 2012 New Phytologist 195 291/2 The pollen tube delivers two sperm cells to the female gametophyte, one of which fuses with the egg cell and one of which fuses with the central cell. extracted from centraladj. < as lemmas
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> as lemmas