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A broadly sampled 3-loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: II. Atraphaxis selengensis spec. nov., and A. davurica Jaub. et Spach from Russian Transbaikaliaстатья Исследовательская статья
Информация о цитировании статьи получена из
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Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 17 февраля 2022 г.
- Авторы: Yurtseva O.V., Badmaeva N.K., Mavrodiev E.V.
- Журнал: Phytotaxa
- Том: 484
- Номер: 1
- Год издания: 2021
- Издательство: Magnolia Press
- Местоположение издательства: New Zealand
- Первая страница: 044
- Последняя страница: 074
- DOI: 10.11646/phytotaxa.484.1.2
- Аннотация: Maximum Likelihood (ML) and Bayesian analyses (BI) applied for 3-plastid loci (cpDNA trnL(UAA) intron, trnL–trnF IGS, and rpl32–trnL(UAG) IGS regions) / 54 tips of Atraphaxis revealed a subclade of two endemics from Transbaikalia (Dahuria) which are often mistaken for A. pungens and A. frutescens, but phylogenetically distant from both. Atraphaxis selengensis is a species new to science which inhabits dune sands along the Selenga and Chikoy rivers and has specific morphology of perianth, fruits, ochreas, leaf blades, and pollen. Atraphaxis davurica inhabits stony mountain steppe in Buryatia and Chita region and differs from A. pungens and A. frutescens in having longer ochreas, fruits, styles and stigmas extended to ends. Two varieties recognized by Ledebour in A. davurica from Russian Transbaikalia have no clear morphological and molecular distinctions, but the plants from Khentei-Chikoy Highlands subtly differ in leaf ratio (length/width), bark colour, and a single-nucleotide substitution in trnL-F region. These plants have been described as A. davurica var. chikoensis. Morphological descriptions of A. selengensis and A. davurica are supplied with LM and SEM images and a distributional map. Atraphaxis frutescens and A. pungens are absent from Russian Transbaikalia, but distributed in Altai, Tuva, Khakassia, Mongolia and China.
- Добавил в систему: Юрцева Ольга Витальевна
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