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Интеллектуальная Система Тематического Исследования НАукометрических данных |
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The reproductive organ morphology of Dysphania R.Br. (Chenopodiaceae) in the context of geographic isolationстатья
- Автор: Sukhorukov A.P.
- Сборник: Analytical approaches in floristic studies and methods of biogeography
- Год издания: 2012
- Место издания: Astrakhan State Univ Astrakhan
- Первая страница: 64
- Последняя страница: 67
- Аннотация: The fruit and seed-structure characters support the division of the genus in a recent revision into several geographically localised groups: (1) Australian taxa with minute (0.3—0.65 mm) fruits that are apparently not found in any species of Chenopodioideae. Pericarp smooth with reticulate ultrasculpture or with tiny papillae. Seeds very different in shape, globose, oblong with groove, keeled or not, as a rule with a vertical and almost straight (not curved) embryo. This orientation of the seed embryo is not found in the subfam. Chenopodioideae; (2) Eurasian, African + one North American (D. graveolens) taxa. Fruits 0.6—0.9 mm in diameter, subglobose, with length/thickness ratio 1.2—1.3:1. The pericarp with small conical or cylindrical papillae is an additional character for delimitation of the species (Sukhorukov, in prep.), rarely (almost) lacking pericarp outgrowths (D. congolana, D. pseudomultiflora). Seeds with horizontal and peripheral curved embryo; (3) American species with larger (0.7—1.5 mm) subglobose or broadly ovoid fruits (length/thickness ratio 1.3—1.4:1) having prominent glandular (vesicular) hairs with a few-celled stalk (D. ambrosioides, D. anthelmintica, D. chilensis, D. multifida. bonariensis and other American species (see also [75]) that are not observed in the pericarp of any other lineage, in contrast to earlier data [76]. The seeds have a horizontal or rarely both horizontal and vertical (in D. sect. Adenois, after Clemants & Mosyakin) peripheral curved embryo. D. multifida and D. bonariensis, previously included in Roubieva (as R. multifida and R. bonariensis respectively), differ from other taxa mainly in the balustriform and hardened perianth with segments that are fused at its apex.
- Добавил в систему: Сухоруков Александр Петрович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Sukhorukov_Dysphania_2012.pdf | Sukhorukov_Dysphania_2012.pdf | 155,6 КБ | 30 марта 2013 [Alexander-Sukhorukov] |