Abstract
Field observations of flowering Alisma plantago-aquatica plants were carried out in Moscow region (Russia). The A. plantago-aquatica flower remains anthetic for a single light day, from 9:00 a.m. to 8:00 p.m. White petals showed a contrast bicolored pattern in UV light, and the pattern probably serves as a nectar clue for pollinators. Flowers were visited by insects in daytime from 11:00 a.m. to 3:00 p.m. Coleopterans (Coccinellidae), dipterans (Drosophilidae, Hybotidae, Muscidae, Sepsidae, and Syrphidae), and hymenopterans (Apidae) were observed as flower visitors. Hoverflies (Syrphidae) and bees (Apidae) were the most frequent visitors. Large amounts of A. plantago-aquatica pollen grains were found on their bodies, and a major role in pollination was consequently assumed for the insects. Based on the original findings and literature data on A. plantago-aquatica reproductive biology in Belgium, Slovakia, and the Czech Republic, hoverflies were identified as the most stable and efficient pollinators of A. plantago-aquatica in various parts of the species range. Bees (Apidae) were recognized as A. plantago-aquatica pollinators for the first time in this work. A flower isolation experiment confirmed that A. plantago-aquatica is a self-compatible plant, but requires insects for the most efficient cross-pollination.
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ACKNOWLEDGMENTS
We are grateful to D.D. Sokolov for valuable advice on field experiments and manuscript preparation.
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This work was supported by the Russian Science Foundation (project no. 19-14-00055).
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Translated by T. Tkacheva
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Vislobokov, N.A., Kuzmicheva, E.A. Flowering Biology of Alisma plantago-aquatica (Alismataceae). Dokl Biol Sci 506, 172–178 (2022). https://doi.org/10.1134/S0012496622050167
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DOI: https://doi.org/10.1134/S0012496622050167