Watanabea

Watanabea
Watanabea sp., arrow (N) shows nucleus. Scale bar = 10 μm.
Scientific classification Edit this classification
Kingdom: Plantae
Division: Chlorophyta
Class: Trebouxiophyceae
Order: Watanabeales
Family: Watanabeaceae
Genus: Watanabea
N.Hanagata, I.Karube, M.Chihara & P.C.Silva
Type species
Watanabea reniformis
N.Hanagata, I.Karube, Chihara & P.C.Silva[1]
Species[1]

Watanabea is a genus of microscopic green algae in the family Watanabeaceae.[1] It is widespread in terrestrial and freshwater habitats, including as a photobiont within lichens,[2] but is apparently rare.[3]

Watanabea consists of single, coccoid cells, which are cylindrical to ellipsoid when young, becoming subspherical when mature. Cells contain a single chloroplast, which may or may not be lobed, and may have or lack a pyrenoid. Cells are surrounded by a thin, smooth cell wall.[3] Watanabea reproduces asexually by autospores; a cell may form one of two different types of autospores, either E-form (ellipsoidal, smaller and more numerous) or S-form (subspherical, larger and fewer).[4]

Watanabea is the type genus of the family Watanabeaceae, which in turn is the only family in the order Watanabeales. Like Watanabea, members of the family consist mostly of coccoid cells and show a high amount of cryptic diversity. A key morphological feature in this group is the presence of unequally sized autospores.[5]

References

  1. ^ a b c Guiry, M.D.; Guiry, G.M. "Watanabea". AlgaeBase. University of Galway. Retrieved 2025-01-08.
  2. ^ Chiva, Salvador; Dumitru, Cristina; Bordenave, César Daniel; Barreno, Eva (2021). "Watanabea green microalgae (Trebouxiophyceae) inhabiting lichen holobiomes: Watanabea lichenicola sp. Nova". Phycological Research. 69 (4): 226–236. doi:10.1111/pre.12463.
  3. ^ a b Darienko, Tatyana; Pröschold, Thomas (2019). "Reevaluation and discovery of new species of the rare genus Watanabea and establishment of Massjukichlorella gen. nov. (Trebouxiophyceae, Chlorophyta) using an integrative approach". Journal of Phycology. 55 (2): 493–499. doi:10.1111/jpy.12830. PMID 30582760.
  4. ^ Hanagata, Nobutaka; Karube, Isao; Chihara, Mitsuo; Silva, Paul C. (1998). "Reconsideration of the taxonomy of ellipsoidal species of Chlorella (Trebouxiophyceae, Chlorophyta), with establishment of Watanabea sen. Nov". Phycological Research. 46 (4): 221–229. doi:10.1111/j.1440-1835.1998.tb00117.x.
  5. ^ Li, Shuyin; Tan, Haochen; Liu, Benwen; Zhu, Huan; Hu, Zhengyu; Liu, Guoxiang (2021). "Watanabeales ord. Nov. And twelve novel species of Trebouxiophyceae (Chlorophyta)". Journal of Phycology. 57 (4): 1167–1186. doi:10.1111/jpy.13165. PMID 33713360.
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