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Tetradesmus obliquus UTEX B 72 in liquid culture [Image credit: phase microscopy by Elena L. Peredo]

Tetradesmus obliquus​ UTEX B 72

The green alga ​Tetradesmus obliquus​​ (Turpin) M. J. Wynne belongs to the class Chlorophyceae and the order Sphaeropleales. Formerly referred as ​Scenedesmus obliquus (Turpin) Kützing 1833 or A​cutodesmus obliquus​ (Turpin) Hegewald & Hanagata 2000, the currently accepted name is ​Tetradesmus obliquus ​(Turpin) M. J. Wynne 2016.

Tetradesmus obliquus​ is an aquatic microalgae commonly found in freshwater environments. The cells are elongated without spines. The cell morphology can be variable but, in liquid culture, this species is often found forming microcolonies. After asexual division by multiple fission, cells remain attached along the lateral walls forming sheet-like, multicellular coenobium of 4 or 8 cells.

Tetradesmus obliquus​​ UTEX B 72 is closely related to the desert-evolved ​Tetradesmus deserticola​​ SNI-2, an extremely desiccation tolerant microalga. However, ​T. obliquus​ is desiccation intolerant and dies upon rehydration.

The strain UTEX B 72 was obtained from the Culture Collection of Algae at the University of Texas at Austin ​(https://utex.org/products/utex-b-0072​, referred to there by the synonymous name ​Scenedesmus acutus​​ f. ​alternans​).

References

Cardon, Z. G., Peredo, E. L., Dohnalkova, A. C., Gershone, H. L., & Bezanilla, M. (2018) A model suite of green algae within the Scenedesmaceae for investigating contrasting desiccation tolerance and morphology. ​J Cell Sci,​ ​131​(7), doi: 10.1242/jcs.212233.