gametophyten.

Brit.

/ɡəˈmiːtə(ʊ)fʌɪt/,

/ˈɡamᵻtə(ʊ)fʌɪt/, U.S.

/ɡəˈmidəˌfaɪt/

Origin: Formed within English, by compounding. Etymons: gameto- comb. form, -phyte comb. form.

Etymology: < gameto- comb. form + -phyte comb. form, after sporophyte n. at sporo- comb. form . Compare slightly earlier oophyte n. at oo- comb. form .

Botany.

In the life cycle of plants with alternating generations: the gamete-producing form, usually haploid, as opposed to the spore-producing, usually diploid form (the sporophyte); the sexual form of the plant. Also attributive.The gametophyte is the conspicuous and dominant form in mosses and other bryophytes; in angiosperms it is reduced to only a few cells.Earlier names for this form were oophore n. and oophyte n. at oo- comb. form .

ΚΠ

1888 S. H. Vines in Encycl. Brit. XXIV. 125/1 In the great majority of plants there is a well-marked alternation of generations,—an alternation, that is, of a sexual form, the gametophyte, with an asexual form, the sporophyte.

1919 W. L. Eikenberry Prob. in Bot. 124 The leafy moss plant, with which you have been comparing the fern, is a gametophyte; the spore case and stalk are the sporophyte generation.

1930 Science 2 Aug. 181/2 The apparent inability of the gametophyte to develop adequate roots perhaps accounts for its failure to reach dimensions at all comparable to those of the higher plants.

1985 Cambr. Encycl. Life Sci. ii. 64/2 Some pteridophytes retain the tiny gametophyte within the protection of the spore coat (endospory).

2007 B. Glover Understanding Flowers & Flowering xi. 105 Within the angiosperms the gametophyte generation has been reduced to only a few cell divisions, which are retained within the sporophyte body, the familiar flowering plant.

Derivatives

gametoˈphytic adj. of or relating to a gametophyte.

ΚΠ

1892 Bot. Gaz. 17 112 The lowest Sporophyta are included in the gametophytic body and are therefore parasitic upon the sexual plant.

1959 A. S. Foster & E. M. Gifford Compar. Morphol. Vascular Plants ii. 20 The alternation of sporophytic and gametophytic generations in the life cycle.

2002 Ann. Bot. 89 67/2 Six of the eight genera investigated..have gametophytic self-incompatibility.

This entry has been updated (OED Third Edition, March 2013; most recently modified version published online March 2022).

单词	gametophyte
释义	gametophyten. Brit. /ɡəˈmiːtə(ʊ)fʌɪt/, /ˈɡamᵻtə(ʊ)fʌɪt/, U.S. /ɡəˈmidəˌfaɪt/ Origin: Formed within English, by compounding. Etymons: gameto- comb. form, -phyte comb. form. Etymology: < gameto- comb. form + -phyte comb. form, after sporophyte n. at sporo- comb. form . Compare slightly earlier oophyte n. at oo- comb. form . Botany. In the life cycle of plants with alternating generations: the gamete-producing form, usually haploid, as opposed to the spore-producing, usually diploid form (the sporophyte); the sexual form of the plant. Also attributive.The gametophyte is the conspicuous and dominant form in mosses and other bryophytes; in angiosperms it is reduced to only a few cells.Earlier names for this form were oophore n. and oophyte n. at oo- comb. form . ΚΠ 1888 S. H. Vines in Encycl. Brit. XXIV. 125/1 In the great majority of plants there is a well-marked alternation of generations,—an alternation, that is, of a sexual form, the gametophyte, with an asexual form, the sporophyte. 1919 W. L. Eikenberry Prob. in Bot. 124 The leafy moss plant, with which you have been comparing the fern, is a gametophyte; the spore case and stalk are the sporophyte generation. 1930 Science 2 Aug. 181/2 The apparent inability of the gametophyte to develop adequate roots perhaps accounts for its failure to reach dimensions at all comparable to those of the higher plants. 1985 Cambr. Encycl. Life Sci. ii. 64/2 Some pteridophytes retain the tiny gametophyte within the protection of the spore coat (endospory). 2007 B. Glover Understanding Flowers & Flowering xi. 105 Within the angiosperms the gametophyte generation has been reduced to only a few cell divisions, which are retained within the sporophyte body, the familiar flowering plant. Derivatives gametoˈphytic adj. of or relating to a gametophyte. ΚΠ 1892 Bot. Gaz. 17 112 The lowest Sporophyta are included in the gametophytic body and are therefore parasitic upon the sexual plant. 1959 A. S. Foster & E. M. Gifford Compar. Morphol. Vascular Plants ii. 20 The alternation of sporophytic and gametophytic generations in the life cycle. 2002 Ann. Bot. 89 67/2 Six of the eight genera investigated..have gametophytic self-incompatibility. This entry has been updated (OED Third Edition, March 2013; most recently modified version published online March 2022). < n.1888
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