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Classification of the early-divergent angiosperm family Hydatellaceae: one genus instead of two, four new species and sexual dimorphism in dioecious taxaстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Sokoloff D.D., Remizowa M.V., Macfarlane T.D., Rudall P.J.
- Журнал: Taxon
- Том: 57
- Номер: 1
- Год издания: 2008
- Издательство: International Association for Plant Taxonomy
- Местоположение издательства: Austria
- Первая страница: 179
- Последняя страница: 200
- Аннотация: Hydatellaceae was traditionally circumscribed as a family of two genera, Hydatella and Trithuria. We place Hydatella in synonymy of Trithuria. We describe three new species of Hydatellaceae from northern Australia and one new species from south-western Western Australia. Thus, we distinguish a single genus of Hydatellaceae, Trithuria, which consists of one species in New Zealand, ten species in Australia and one species in India. Two main characters were formerly used to distinguish between Hydatella and Trithuria: (1) reproductive units unisexual (homogamous) vs. bisexual (heterogamous) and (2) fruits with three prominent ribs, typically dehiscent vs. without prominent ribs, indehiscent. New evidence shows that the type of reproductive unit does not correlate with fruit morphology in Hydatellaceae. We hypothesize that two south-western Australian endemics known as Hydatella dioica and Trithuria occidentalis represent male and female individuals, respectively, of the same biological species. All four dioecious species of Hydatellaceae show similar sexual dimorphism. Male plants have reproductive units with longer and fewer involucral bracts than female ones. Anthers are much longer in dioecious species than in the morphologically closest cosexual species. The evolutionary significance of dioecy in Hydatellaceae is discussed.
- Добавил в систему: Соколов Дмитрий Дмитриевич