Roholtiella edaphica Bohunická et Lukešová, 2015
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publication ID |
https://doi.org/ 10.11646/phytotaxa.197.2.2 |
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persistent identifier |
https://treatment.plazi.org/id/038E3E76-FFDE-A120-DFCB-E438ECD4FBFC |
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treatment provided by |
Felipe |
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scientific name |
Roholtiella edaphica Bohunická et Lukešová |
| status |
sp. nov. |
Roholtiella edaphica Bohunická et Lukešová , spec. nov. ( Figs. 1A View FIGURE 1 –AB, 4A–F)
Differing from all other species in the genus through the evident swelling of the trichome near basal heterocytes in mature filaments. Further differing from R. mojaviensis in occurring in temperate, mesic soils and having olive coloration rather than deep blue-green coloration. Differing from all other species in the sequence of the flanking regions of the Box-B and V3 helices of the 16S-23S ITS region ( Fig. 5 View FIGURE 5 ).
Type: — USA. Sahara Number 6 Mine, Ashby-Kolar Research Plots, recultivated spoil after coal mining, without addition of top soil, west south-west of Harrisburg, IL. Dried specimen from culture of sample, A. Lukešová, November 2009 (holotype: CBFS! A-041- 1, Herbarium at the Department of Botany, Faculty of Science, University of South Bohemia, Czech Republic). Reference strain: CCALA 1063 (Culture Collection of Autotrophic Organisms at the Institute of Botany of the ASCR, Třeboň, Czech Republic).
Description: —Thallus flat spreading, sometimes with bundles of filaments visible on the substrate surface or Nostoc - like rugged surface when old, growing into the substrate, green, olive-green, brown-olive, brown-green, red-brown or black-green, sometimes releasing brown or brownish-red pigment into the substrate. Filaments short to long, single or rarely double false branched ( Figs. 1K, N, T, U View FIGURE 1 ), isopolar ( Fig. 1R View FIGURE 1 ) or heteropolar ( Figs. 1J–Q View FIGURE 1 ). Sheath thin, firm ( Figs. 1S–V View FIGURE 1 ), sometimes widened, closed at the ends ( Fig. 1 View FIGURE 1 AB) or becoming diffluent towards the ends ( Fig. 1S View FIGURE 1 ), or open when releasing arthrospores ( Fig. 1Y View FIGURE 1 ), colorless, slightly pinkish, orange, red to red-brown. Trichomes constricted at crosswalls, not tapered or distinctly gradually tapered, slightly ( Figs. 1J–K, N View FIGURE 1 ) or distinctly ( Figs. 1M, O–Q View FIGURE 1 ) swollen at the base, widest cells basal or intercalary, 6.2–12.3 μm wide. Cells typically shorter than wide, sometimes isodiametric ( Figs. 1H View FIGURE 1 , AA) or slightly longer than wide, barrel-shaped to almost spherical or spherical compressed ( Figs. 1M–Q View FIGURE 1 ), with smooth to finely granulated content, typically olive-green but also blue-green, grey-green, brown, green, orange-green or orange, 1.6–8.2(9.0) μm long. End cells conical ( Figs. 1H–I View FIGURE 1 ), conical rounded or rounded ( Figs. 1W View FIGURE 1 –AB), 3.3–5.7(6.5) μm wide, 3.2–6.8 μm long. Heterocytes both intercalary ( Fig. 1J View FIGURE 1 ) and terminal ( Figs. 1K–Q View FIGURE 1 ), with smooth pale yellow content, when intercalary barrel shaped, shorter than wide, when terminal spherical, hemispherical or elongated rounded, pale yellow or yellow, 4.0–10.7 μm wide, 2.8–9.0 μm long. Hormogonia short ( Figs. 1A–G View FIGURE 1 ), with cells 2.9–5.2(5.7) μm wide, 1.6–4.9 μm long. Arthrospores released from the end of the filament by dissociation ( Figs. 1X View FIGURE 1 –AA), typically 6.1–11.1 μm wide, 4.6–9.3 μm long. Necridic cells rarely present.
Habitat: —temperate climate soil.
Etymology: —From the Latin edaphica (= soil-inhabiting), referring to the habitat of origin of the taxon.
Other strains: —CCALA 1055 (CBFS! A-046-1), CCALA 1056 (CBFS! A-042-1), CCALA 1061 (CBFS! A-044-1), CCALA 1060 (CBFS! A-043-1), CCALA 1062 (CBFS! A-045-1)
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.