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Symphyonema bifilamentata sp. nov., the Right Fischerella ambigua 108b: Half a Decade of Research on Taxonomy and Bioactive Compounds in New Light

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Applied Logistics and Polymer Sciences, University of Applied Sciences Kaiserslautern, Carl-Schurz-Str. 10-16, 66953 Pirmasens, Germany
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Faculty of Chemistry and Food Chemistry, Technical University of Dresden, Chair of Technical Biochemistry, Bergstraße 66, 01069 Dresden, Germany
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Biology Institute, University of Kaiserslautern, Erwin-Schrödinger Str. 52, 67663 Kaiserslautern, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Assaf Sukenik
Microorganisms 2021, 9(4), 745; https://doi.org/10.3390/microorganisms9040745
Received: 3 March 2021 / Revised: 30 March 2021 / Accepted: 31 March 2021 / Published: 2 April 2021
(This article belongs to the Section Microbial Biotechnology)
Since 1965 a cyanobacterial strain termed ‘Fischerella ambigua 108b’ was the object of several studies investigating its potential as a resource for new bioactive compounds in several European institutes. Over decades these investigations uncovered several unique small molecules and their respective biosynthetic pathways, including the polychlorinated triphenyls of the ambigol family and the tjipanazoles. However, the true taxonomic character of the producing strain remained concealed until now. Applying a polyphasic approach considering the phylogenetic position based on the 16S rRNA and the protein coding gene rbcLX, secondary structures and morphological features, we present the strain ‘Fischerella ambigua 108b’ as Symphyonema bifilamentata sp. nov. 97.28. Although there is the type species (holotype) S. sinense C.-C. Jao 1944 there is no authentic living strain or material for genetic analyses for the genus Symphyonema available. Thus we suggest and provide an epitypification of S. bifilamentata sp. nov. 97.28 as a valid reference for the genus Symphyonema. Its affiliation to the family Symphyonemataceae sheds not only new light on this rare taxon but also on the classes of bioactive metabolites of these heterocytous and true-branching cyanobacteria which we report here. We show conclusively that the literature on the isolation of bioactive products from this organism provides further support for a clear distinction between the secondary metabolism of Symphyonema bifilamentata sp. nov. 97.28 compared to related and other taxa, pointing to the assignment of this organism into a separate genus. View Full-Text
Keywords: Symphyonema; true-branching; heterocytes; ambigol; polyphasic approach; Fischerella Symphyonema; true-branching; heterocytes; ambigol; polyphasic approach; Fischerella
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MDPI and ACS Style

Jung, P.; D’Agostino, P.M.; Büdel, B.; Lakatos, M. Symphyonema bifilamentata sp. nov., the Right Fischerella ambigua 108b: Half a Decade of Research on Taxonomy and Bioactive Compounds in New Light. Microorganisms 2021, 9, 745. https://doi.org/10.3390/microorganisms9040745

AMA Style

Jung P, D’Agostino PM, Büdel B, Lakatos M. Symphyonema bifilamentata sp. nov., the Right Fischerella ambigua 108b: Half a Decade of Research on Taxonomy and Bioactive Compounds in New Light. Microorganisms. 2021; 9(4):745. https://doi.org/10.3390/microorganisms9040745

Chicago/Turabian Style

Jung, Patrick, Paul M. D’Agostino, Burkhard Büdel, and Michael Lakatos. 2021. "Symphyonema bifilamentata sp. nov., the Right Fischerella ambigua 108b: Half a Decade of Research on Taxonomy and Bioactive Compounds in New Light" Microorganisms 9, no. 4: 745. https://doi.org/10.3390/microorganisms9040745

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