Trouble with lichen: the re-evaluation and re-interpretation of thallus
form and fruit body types in the molecular era.
The illustrations of the thallus
structures of the ten lichen species from Parmeliaceae family investigated in the present study are shown in Figure 1.
In this study, Young's modulus of thallus
was decreased significantly after S.
Parmotrema screminiae (Figure 1) has a sorediate, saxicolous thallus
and eciliate lobes.
The sporophyte is a multicellular thallus
typically consisting of internal (i.e.
They are usually prostrate, with a dorsiventral thallus
, 20-50 x 0.80-1.20 mm, without hairs; section of thallus
shows the lamina and the border unistratose throughout; border cells have thickened walls, clearly distinct from the rest of the lamina, and single spines, 15-35 [micron]m long; the spines are sparsely distributed along the marginal cells.
Taxonomic features used for identification included type of cell connections (fusions and secondary pits), thallus
organization, presence/absence and position of mega cells (trichocytes), and characteristics of the reproductive structures (conceptacles) (Appendix Table A1; Appendix Figs.
Even if upper parts of the thallus
are under oversaturated light conditions, the productivity of the rest of the algal thallus
compensates for this reduced photosynthetic production (Sand-Jensen et al., 2007).
Collections and observations were often made at marked locations or along semi-permanent transect lines, which allowed us to note species occurrence, reproductive periodicity, and in some instances, seasonal thallus
Their equisetum-like body called "thallus
" forms neither tissues nor typical organs, such as stems, leaves, roots, or flowers.