| 单词 | gemma |
| 例句 | "To do so we made use of two systems: gemmae of the liverwort Marchantia polymorpha, and the early-stage first true leaf of Arabidopsis thaliana." How new plant cell walls change their mechanical properties after cell division 2023-10-02T04:00:00Z Liverwort plants can also reproduce asexually, by the breaking of branches or the spreading of leaf fragments called gemmae. Fundamentals of Biology 2015-01-01T00:00:00Z The gemmae formed on submerged Mucors may bud like a yeast, and even bring about alcoholic fermentation in a saccharine solution. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z Gem, or Gemmule, from the Latin gemma, a bud. Principles of Geology or, The Modern Changes of the Earth and its Inhabitants Considered as Illustrative of Geology We have in plastic art only two pictorial reproductions: the so-called Vienna gemma, Augustus's Pannonian triumph, and the Parisian gemma, Germanicus's triumph, to show us objectively the vestments of the ancient Germans. Women of the Teutonic Nations Woman: In all ages and in all countries Vol. 8 (of 10) The frond grows from a flat disc-shaped gemma, the two sides of which are alike. Essays: Scientific, Political, & Speculative, Vol. I Apart from the separation of branches by the decay of older portions, special gemmae are found in many species. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" Will any one show me an instance of a proved gemma taking upon itself the form of one of these anthers? Journals of Travels in Assam, Burma, Bhootan, Afghanistan and the Neighbouring Countries The gemma is found most frequently in the liverworts and mosses, and is highly characteristic of these plants, in which indeed vegetative reproduction maybe said to reach its fullest and most varied extent. Scientific American Supplement, No. 531, March 6, 1886 In Blasia and Marchantia the gemmae are formed within tubular or cup-shaped receptacles, out of which they are forced by the swelling of mucilage secreted by special hairs. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" This interesting liverwort produces two kinds of gemmae, and in the localities in which it grows is largely reproduced by their means. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" Usually the gemmae arise by the outgrowth of superficial cells, and become free by breaking away from their stalk. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" Besides this, gemmae may be formed on the protonema, on the leaves or at the apex, and some mosses have specialized shoots for their better protection or distribution. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" Erect branches may arise from the protonema, and gemmae may be developed on it. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" |
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