Abstract

Chromosome numbers (2n) of 15 invasive and potentially invasive plant species from the families Asteraceae, Brassicaceae, Caryophyllaceae, Malvaceae, Onagraceae, Papaveraceae, Plantaginaceae, Poaceae, Polygonaceae, Portulacaceae, and Rosaceae are reported on the samples collected in the Republic of Altai. To determine the chromosome number (ploidy level), the method of direct counting was used. Among studied species, chromosome complements for Persicaria orientalis (2n = 22), Potentilla norvegica (2n = 42), Veronica persica (2n = 28) were first examined from Russia; for Papaver rhoeas (2n = 14) and Rumex obtusifolius (2n = 20) – from Asian part of Russia; for Bromus squarrosus (2n = 14), Cosmos bipinnatus (2n = 24), and Eriochloa villosa (2n = 54) – from Siberia. Abutilon theophrasti (2n = 42) and Lepidium densiflorum (2n = 32) were first studied from Western Siberia; Epilobium ciliatum subsp. adenocaulon (2n = 36), Portulaca oleracea (2n = 36), Spergularia rubra (2n = 36), and Xanthium strumarium (2n = 36) – from the Republic of Altai. Common distribution and the history of floristic findings of these species in the Republic of Altai are given. Previously published data on chromosome numbers from Russia are cited.

Highlights

  • Chromosome numbers (2n) of 15 invasive and potentially invasive plant species from the families Asteraceae, Brassicaceae, Caryophyllaceae, Malvaceae, Onagraceae, Papaveraceae, Plantaginaceae, Poaceae, Polygonaceae, Portulacaceae, and Rosaceae are reported on the samples collected in the Republic of Altai

  • This research provides data on the chromosome numbers of 15 species, most of which are invasive on the territory of the Republic of Altai

  • Since the end of the 20th century, it actively spreads in the regions of Siberia including the Republic of Altai (Zykova, 2015)

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Summary

Introduction

We continue the karyological study of invasive and potentially invasive species in the flora of Southern Siberia on the material from the Republic of Altai (Lomonosova et al, 2018; Zykova et al, 2018, 2020, 2021). This research provides data on the chromosome numbers of 15 species, most of which are invasive on the territory of the Republic of Altai. The same number was determined from Novosibirsk Region (Lomonosova, 2013), Altai (Chisla khromosom ..., 1990) and Primorye (Probatova, 2014, and references therein) Territories.

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