sorus


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to sorus: indusium, microsporocyte, megasporophyll, megasporocyte, megagametophyte

sorus

(sôr′əs)
n. pl. sori (sôr′ī)
1. A cluster of sporangia borne on the underside of a fern frond. Also called fruit dot.
2. A reproductive structure in certain fungi and lichens.
Sorusclick for a larger image
Fig. 286 Sorus . Transverse section.

sorus

a group of sporangia developed on the underside of SPOROPHYLLS (spore-bearing leaflets) of the SPOROPHYTE generation of a fern.
Mentioned in ?
References in periodicals archive ?
2 mm long), fugacious and often apparently absent, usually evident as a tuft of whitish hairs in the center of the sorus 2.
5 cm wide), clathrate and iridescent rhizome scales that are glabrous throughout or with only one apical cilium, laminae with only one sorus per segment, and fertile veins that present the sclerenchyma visible beneath the sporangia.
The fern genus Phlebodium is traditionally described as having a row of costal areoles lacking included veins, with the sori located in extra-costal areoles and each sorus served by two veinlets.