| 单词 | cell wall |
| 释义 | > as lemmascell wall cell wall n. [apparently after German Zellwand (1828 or earlier)] a rigid layer present outside the cell membrane in plants, fungi, algae, and many bacteria, consisting mainly of cellulose and other polysaccharides (in plants, fungi, and algae) or peptidoglycans (in bacteria), and providing cells with structure and protection. ΘΚΠ the world > life > biology > substance > cell > parts of cell > [noun] > wall or membranes septum1720 cell wall1840 valve1852 periplast1853 stroma1872 ghost1879 endoplasmic reticulum1883 plasma membrane1893 plasmalemma1923 unit membrane1958 purple membrane1968 1840 Philos. Trans. (Royal Soc.) 130 551 Schleiden remarks, ‘The formation of secondary deposits on the inner surface of the cell-wall does not commence..until after the absorption of the cytoblast.’ 1882 S. H. Vines tr. J. von Sachs Text-bk. Bot. (ed. 2) 3 Older wood and cork thus consist of a mere framework of cell-walls. 1934 C. C. Steele Introd. Plant Biochem. iii. x. 100 The pectose of the cell-wall is a condensation product of pectin and cellulose, that is, a pectocellulose, similar in constitution to the glycosides. 1959 Times 2 Jan. 11/3 Penicillin does not affect the growth of the staphylococcus but it does prevent its forming a cell wall. 2006 Science 11 Aug. 774 (caption) This differentiation process, mediated by the secreted factor xylogen, results in secondary cell-wall thickening and programmed cell death. < as lemmas |
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