Fottea 2023, 23(1):49-61 | DOI: 10.5507/fot.2022.012

Khargia gen. nov., a new genus of simple trichal Cyanobacteria from the Persian Gulf

Somayeh Rasouli-Dogaheh1, Mostafa Noroozi2*, Javad Khansha3, Mohammad Ali Amoozegar4, Rezvan Rahimi5, Mahdi Moshtaghi Nikou5, Tomáš Hauer1
1 University of South Bohemia, Faculty of Science, Branišovská 1645/31A, CZ-37005 České Budějovice, Czech Republic
2 Department of Biotechnology, Faculty of Biological Sciences, Alzahra University, Tehran, Iran;
* Corresponding author e-mail: mo_noroozi2003@yahoo.com, Noroozi.mostafa@alzahra.ac.ir
3 Department of Microbiology, College of Science, University of Tehran, Tehran, Iran
4 Extremophiles Laboratory, Department of Microbiology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Enghelab Street, Tehran, Iran
5 Microorganisms Bank, Iranian Biological Resource Centre (IBRC), Academic Center for Education and Research (ACECR), West Howeyzeh street, Tehran, Iran

Information regarding the diversity of Cyanobacteria in many parts of the world is still minimal. One example of a region that has not yet been widely studied is south-western Asia, including the region of the Persian Gulf. A culture-dependent study of cyanobacterial diversity in a rainwater basin on Kharg Island enabled the isolation of a novel taxon, previously unnamed, from a simple trichal cyanobacterium. Further comparisons showed the existence of closely related strains/taxa from other parts of the world, namely the strains CCALA 945 isolated from South Italy and "Leptolyngbya india" from India. Herein, we have thus described the new genus Khargia and the new species Khargia iranica. Other strains, isolated by other authors, were included in the Khargia genus as additional species: Khargia italica and Khargia indica. The recognition of the new genus was based on morphological evaluations (identification by both light and electron microscopy), the phylogenetic analyses based on the 16S rRNA gene, and species delimitation based on Automatic Barcode Gap Definition (ABGD), Generalized Mixed Yule Coalescent (GMYC), bayesian version of Poisson Tree Processes (bPTP), and the secondary structure of 16S-23S rRNA ITS region of the studied strains.

Keywords: species delimitation, cyanobacteria, ITS secondary structure, polyphasic taxonomy, Persian Gulf

Received: January 6, 2022; Revised: April 30, 2022; Accepted: June 14, 2022; Prepublished online: February 8, 2023; Published: April 1, 2023  Show citation

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Rasouli-Dogaheh, S., Noroozi, M., Khansha, J., Amoozegar, M.A., Rahimi, R., Nikou, M.M., & Hauer, T. (2023). Khargia gen. nov., a new genus of simple trichal Cyanobacteria from the Persian Gulf. Fottea, 23(1), 49-61. doi: 10.5507/fot.2022.012
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