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Leaf vasculature in four species of Caputia B. Nord. & Pelser (Asteraceae, Senecioneae)статья
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 8 апреля 2022 г.
- Авторы: Lebedev R.E., Chukavin N.N., Pavlov C.D., Timonin A.C.
- Журнал: Wulfenia
- Том: 28
- Год издания: 2021
- Издательство: Botanischer Garten des Landes Karnten
- Местоположение издательства: Austria
- Первая страница: 227
- Последняя страница: 240
- Аннотация: The investigated species of Caputia are leaf-succulent plants. Various leaf types are inherent in these species, namely typical flat (C. medley-woodii, C. scaposa), terete fusiform (C. tomentosa) and terete cylindrical (C. pyramidata, C. scaposa). The fusiform leaves are morphologically and anatomically very similar to the unifacial leaves which were previously specified for a few species of Senecioneae. However, the arrangement of the main bundles revealed in the leaves under consideration clearly shows that they should all be considered bifacial. The terete leaves are concluded to have evolved from the typical flat, bifacial leaves similar to those in C. medley-woodii. Our conclusion is in a good agreement with the molecular-based phylogeny of Caputia published elsewhere and the succession of the different leaf types on the developing shoot of C. scaposa. The terete leaves evolved by means of arresting marginal growth and increasing thickening growth, the latter having been mostly adaxial in C. tomentosa and abaxial in C. pyramidata. The origin of the terete leaves is ssociated with the emergence of the system of peripheral bundles which are circle-arranged. This circle of bundles is continuous in C. tomentosa and C. scaposa and abaxially discontinuous in C. pyramidata. The circle-arranged peripheral bundles mask the bifacial structure of leaf vasculature. The terete leaves of Caputia should be attributed to the new ‘cryptic bifacial’ anatomical type of leaves to stress their specificit
- Добавил в систему: Тимонин Александр Константинович