Morphology and anatomy of vegetative organs from Smallanthus connatus (Heliantheae: Asteraceae)
Keywords:
Morphology, anatomy, vegetative organs, Smallanthus connatusAbstract
Coll Aráoz, María V.; María I. Mercado; Graciela I. Ponessa; Alfredo Grau. 2012. “Morphology and anatomy of vegetative organs from Smallanthus connatus (Heliantheae: Asteraceae)”. Lilloa 49 (1). Smallanthus connatus (Spreng.) H. Robinson is a native species from the Northeast of Argentina, Paraguay, Uruguay and South of Brazil; closely related to yacon (Smallanthus sonchifolius), an ancient Andean crop used as functional and nutraceutic food. The study of the morphology and anatomy of this wild specie is very interesting due to the fact that it could be employed in crossbreeding with S. sonchifolius. S. connatus presents simple leaves, winged petiole with basal auricules connated with the opposed leaf. Leaves are amphistomatic, epidermic cells with sinuated walls, uniseriated non-glandular trichomes and biseriated glandular trichomes. Central vein with subepidermic collenchyma, 3-5 colateral vascular bundles and secretory schizogenous canals in the surrounding parenchyma. Hexagonal shaped stem with nonglandular and glandular trichomes. Tuberous roots 1-3 cm width per 50 cm long, with secretory schizogenous canals in the cortical parenchyma, adjacent to the endodermis.
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References
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