Leaf development in Curio articulatus (L. f.) P.V. Heath (Asteraceae-Senecioneae)статья
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Дата последнего поиска статьи во внешних источниках: 23 марта 2017 г.
Аннотация:The leaf initiates as paraboloid-shaped primordium without any signs of ad- and abaxial sides. Distinct wider Unterblatt and narrower Oberblatt usually do not develop in the primordium. It grows longer and changes into bifacial formation nearly throughout but the very tip. The latter one remains unifacial and morphogenetically inactive. This tip is incorrectly considered homologous to the Vorläuferspitzen of other Curio species. The lamina generally develops in a typical way, but unifacial tips form on the developing lamina lobes. The lamina lobe tips are quite similar to the leaf tip. Short-functioning adaxial and cross-leaf meristems successively arise in the developing petiole. Activity of the latter one causes the basal lamina lobes to turn to the median plane. It also results in relative narrowing of the adaxial side and subunifacial petiole. Such a petiole is not homologous to the subunifacial terete laminas of other Curio species.