Abstract
Morphological, cultural, and physiological characteristics of 19 Helminthosporium-like hyphomycetes isolated from the White Sea were studied. Taxonomic status of the isolates was verified using molecular genetics techniques. One of the isolates was identified as Alternatia sp., while the rest of the marine isolates belonged to the species Paradendriphiella salina (G.K. Sutherl.) Woudenb. & Crous. The specific features of the isolates studied were characterized as adaptive. Optimum salinity for their growth was 1–2% NaCl, which is lower than the value for the known open ocean isolates. This is probably due to relatively low salinity of White Sea (22–24‰) as compared with the ocean water (35‰). While the temperature optimum for growth was 22°C, growth and sporulation occurred at 6°C, which has not been reported for marine fungi isolated from warmer seawater. All isolates studied grew and sporulated efficiently on the medium supplied with the Fucus algae extract and in the sea water layer. Conidia of the isolates submerged in the sea water were propagated efficiently, unlike the soil-born fungi. Holoblastic conidiogenesis was demonstrated by light and scanning electron microscopy, confirming the separation of P. salina from the genus Scolecobasidium.
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Original Russian Text © Ya.V. Kireev, O.P. Konovalova, N.S. Myuge, A.V. Shnyreva, E.N. Bubnova, 2015, published in Mikrobiologiya, 2015, Vol. 84, No. 5, pp. 582–594.
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Kireev, Y.V., Konovalova, O.P., Myuge, N.S. et al. Cultural properties and taxonomic position of Helminthosporium-like fungal isolates from the White Sea. Microbiology 84, 665–676 (2015). https://doi.org/10.1134/S0026261715050136
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DOI: https://doi.org/10.1134/S0026261715050136