| 释义 |
rhizine Bot.|ˈraɪzɪn|
Also ‖ rhizina |rɪˈzaɪnə|.
[f. Gr. ῥίζα root + -ina = -ίνη.]
A root-like structure on the underside of a lichen, consisting of one or several rhizoids.
1839Lindley Introd. Bot. i. ii. 109 The terms rhizina and rhizula have been given by Link to the young roots of mosses and lichens. 1873Hooker le Maout & Decaisne's Bot. 941 The lower layer, or hypothallus..is ..covered with rootlike hairs, which have been called rhizines. 1887W. Phillips Brit. Discomycetes 40 The rhizinæ are coarse fibres occupying the greater part of the under surface. 1914M. Drummond tr. Haberlandt's Physiol. Plant Anat. v. 260 Among lichens the lower side of the thallus produces numbers of rhizoidal hyphae, which..act as root-hairs. In certain species they are united to form stout strands, the so-called rhizines. 1938G. M. Smith Cryptogamic Bot. I. xv. 515 A rhizine may consist of a single simple to branched hypha or of a number of parallel hyphae that lie closely applied to one another. 1977Nature 6 Jan. 46/1 In contrast to lichens and mosses, whose rhizines and rhizoids serve mainly for attachment, trees have root systems which transport sulphate upward. |