Acclimatization trials of the two tropical species Solanum sessiliflorum (cocona) and Solanum stramonifolium (coconilla) from Amazonas Venezuela, were carried out at the Botanical Garden of Padua. S. sessiliflorum exhibited a greater difference between the Botanical Garden and the native environment. Plant growth was reduced and pollination was difficult; despite numerous blooms few fruits were produced. Moreover, some fruit abscised early and the persistent ones were still unripe at the end of the season. On the contrary, S. stramonifolium showed good adaptation to the new environmental conditions. The plants grew well and produced a lot of ripe berries. Self-pollination as well as cross-pollination by bumblebees (Bombus terrestris) and other insects present in the open air succeeded. Thus, this latter species could be regarded as potentially exploitable in temperate climates as well as in Venezuela.
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Vol. 56 • No. 4