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Boletín de la Sociedad Argentina de Botánica

versión On-line ISSN 1851-2372


CHIARINI, Franco E.; MOYETTA, Natalia R.  y  BARBOZA, Gloria E.. Fruit anatomy of species of Solanum sect. Torva (Solanaceae). Bol. Soc. Argent. Bot. [online]. 2010, vol.45, n.3-4, pp.235-244. ISSN 1851-2372.

The mature fruits of 10 South American species of Solanum sect. Torva were studied. Cross and longitudinal microtome sections, stained with astra blue/basic fuchsin, were made for microscopic examination. All species present an epidermis formed by a unistrate layer of small, isodiametric cells, with dense content and cellulosic walls. Immediately below, a hypodermis is always found, consisting of a well-defined layer of lignified cells with a single calcium oxalate crystal occupying the whole lumen of each cell. This is followed by one layer of cellulosic, isodiametric cells with dense cytoplasm and then several collenchymatous layers, sometimes with sclerified cell walls. The mesocarp comprises two zones histologically differentiated: an external one (formed by regular, vacuolated, medium-sized cells with small intercellular spaces), and an internal one, commonly juicy, and developing proliferations among the seeds. The fruits analyzed are alike, and despite some particularities, they can be classified as berries in the conventional sense. All the traits examined agree with the ornithochorous dispersal syndrome. The homogeneity in fruit traits may be due to shared habit, habitat and sexual system.

Palabras clave : Berry; Dispersal syndrome; Pericarp; Solanum subgen. Leptostemonum; South America.

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