| 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). |