Mycobiota of acorn worm Saccoglossus mereschkowskii (Hemichordata, Enteropneusta) and its habitats

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Abstract

It is known that the tissues and mucous of acorn worms contain phenolic compounds, which inhibit the activity of aerobic bacteria. In this work, the mycobiota of tissues, body surface lavages, and burrows of the acorn worm Saccoglossus mereschkowskii (Wagner, 1885) were studied. 3 species of fungi were found in the plating of intestine samples. 7 species were isolated from the body surface lavage of S. mereschkowskii. 5 species were found in burrow samples, and 15 species were found in the samples of sediment from the habitat of S. mereschkowskii. Plating of intact specimens, gill bars, and axial organ did not reveal the growth of mycelial fungi. This indicates that enteropneust tissues may have a fungistatic effect.

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About the authors

O. V. Ezhova

Lomonosov Moscow State University

Author for correspondence.
Email: olga_ejova@mail.ru

Biological Faculty, Department of Invertebrate Zoology

Russian Federation, Moscow

O. A. Grum-Grzhimaylo

Lomonosov Moscow State University

Email: olga_ejova@mail.ru

Biological Faculty, N.A. Pertsov White Sea Biological Station

Russian Federation, Moscow

J. А. Kokurkina

Lomonosov Moscow State University

Email: olga_ejova@mail.ru

Biological Faculty, Department of Invertebrate Zoology

Russian Federation, Moscow

I. А. Ekimova

Lomonosov Moscow State University

Email: olga_ejova@mail.ru

Biological Faculty, Department of Invertebrate Zoology

Russian Federation, Moscow

М. М. Gantsevich

Lomonosov Moscow State University

Email: olga_ejova@mail.ru

Biological Faculty, Department of Invertebrate Zoology

Russian Federation, Moscow

V. V. Malakhov

Lomonosov Moscow State University

Email: olga_ejova@mail.ru

Biological Faculty, Department of Invertebrate Zoology, Academician of the RAS

Russian Federation, Moscow

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2. Fig. 1. The proportion of different genera of fungi isolated from the intestines, body surface washes, burrows of Saccoglossus mereschkowskii and silt from its habitat.

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3. Fig. 2. Inoculations of intact individuals of Saccoglossus mereschkowskii (a), gill septa (b), rinsing from the body surface of S. mereschkowskii (c) and silt from the habitat of S. mereschkowskii (d). The day after inoculation is indicated. Scale (a, c, d) – 1 cm, (b) – 1 mm.

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