Wilmottia koreana N. Lee, Y. Seo, J. Ki & O. Lee, 2020

Lee, Nam-Ju, Seo, Yoseph, Ki, Jang-Seu & Lee, Ok-Min, 2020, Morphology and molecular description of Wilmottia koreana sp. nov. (Oscillatoriales, Cyanobacteria) isolated from the Republic of Korea, Phytotaxa 447 (4), pp. 237-251 : 242

Wilmottia koreana N. Lee, Y. Seo, J. Ki & O. Lee sp. nov. ( Fig. 1 )

Description: Filaments solitary or forming loose fascicles, straight or flexuous, enveloped by thin, hyaline, and colorless sheaths. Trichomes isopolar, cylindrical, straight or curved, blue-green, not or slightly constricted at the cross–walls, not attenuated, 3.24–4.25 µm wide. Single trichomes have firm, colorless, unlamellated sheaths, open at the end. Vegetative cells isodiametric or rarely longer or shorter than wide, 2.61–5.35 µm long, with scattered large granules. Terminal cells rounded or conical, without calyptra. Thylakoids parietal, fasciculated. Reproduction by disintegration of the trichomes without necridic cells.

Etymology: koreana , from the Republic of Korea.

Holotype (designated here): A formalin fixed specimen, NIBRCY0000001018 in the Herbarium at the National Institute of Biological Resources, from cultured strain FBCC-A812 .

Reference strain: FBCC-A812 (=ACKU585).

Type locality: Mt. Gwanggyo of the Republic of Korea (37°18ʹ17ʺN / 127°02ʹ03ʺE).

Habitat: On tree bark.

Gene sequences: 16S rRNA, 16S–23S rRNA internal transcribed spacer (ITS) and partial 23S rRNA sequences: GenBank #. MN473879.

Diagnosis: Wilmottia koreana vegetative cells are slightly smaller than that of W. murrayi and W. stricta ( Table 2 ). The ultrastructure observed by TEM showed parietal and fasciculated arrangement of the thylakoids like the family Coleofasciculaceae ( Fig. 2 ).

Figures

FIGURE 1. Microphotographs of Wilmottia koreana, from the reference strain FBCC-A812. (A–C) Fasciculated growth of filaments and (D–L) details of the trichomes and firm sheath (sh); Scale bars = A (100 µm), B and C (20 µm), D–L (10 µm).

FIGURE 2. Ultrastructure of two strains; (A–B) Wilmottia koreana strain FBCC-A812 (reference strain) and (C–D) W. murrayi strain FBCC-A401. (A–D) Parietal position of thylakoids (th), showing sheaths (sh) and cell wall (cw).