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

单词	stomium
释义	stomium Bot.\|ˈstəʊmɪəm\| [mod.L., coined in Ger. (K. Goebel 1901, in Organogr. d. Pflanzen 11. 753), f. Gr. στόµιον (see prec.).] In ferns, a part of the wall of the sporangium which ruptures to release the spores. 1905I. B. Balfour tr. Goebel's Organogr. of Plants ii. 575 A point of opening which we may designate the stomium occurs in all sporangia which discharge their spores into the air.1936A. J. Eames Morphol. Vascular Plants xii. 263 The annulus [of the Cyatheaceæ] is complete and oblique (nearly vertical) with a poorly defined stomium.1969F. E. Round Introd. Lower Plants xiii. 156 The sporangial head has a cluster or ring of thickened cells (annulus) which acts as the dehiscence mechanism working on a weaker region of unthickened cells (stomium).
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