soredium


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Related to soredium: soredia

soredium

(sɔːˈriːdɪəm)
n, pl -dia
(Botany) an organ of vegetative reproduction in lichens consisting of a cluster of algal cells enclosed in fungal hyphae: dispersed by wind, insects, or other means
[C19: New Latin, from Greek sōros a heap]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Hill (1994a) found that, in Parmelia sulcata, the number of cell divisions required for the photobiont to populate a young lobe of 2 [mm.sup.2] from a soredium was about nine but the additional number then needed to form mature lobe 25 [mm.sup.2] was less than one indicating that the very early stages of thallus development are the most likely stage in determining the characteristics of the photobiont population in the mature thallus.
Asymmetric co-evolution in the lichen symbiosis caused by a limited capacity for adaptation in the photobiont