Resumo

PALCHETTI, María Virginia; BARBOZA, Gloria Estela  e  COSA, María Teresa. Anatomía foliar en especies de Capsicum (Solanaceae) de diferentes ambientes biogeográficos Sudamericanos. Bol. Soc. Argent. Bot. [online]. 2014, vol.49, n.3, pp.417-436. ISSN 1851-2372.

In this work, the leaf anatomy of 13 Capsicum species growing in different Biogeographic Provinces was studied. A comparative analysis of theleaf epidermis andits internal structurewas carried outin order to find differences and/or similaritiesamong the species and the presence/absence of mesophytic and/or xerophytic characters according to their environmentconditions.The density of epidermal cells, stomata, trichomes and stomatal index were statistically analyzed. The results showed that all the species have similarcharacters; however, there are some unique features that characterize the species as hypostomatic leaves,presence and types of trichomes, presence or absence of crystalsand its variable disposition, fibers in main vein, and probable presence of tannins.Regarding the presence ofxeromorphic or mesomorphic characters, the differences were not significant among the species from different environments except for the amphistomatic leaves and the abundance of crystals,andtrichomesin speciesfrom dry environments. We conclude that the similarity of the leaf epidermal variables and the internal structure observed in the Capsicum species areresponding more to a grouping according to their phylogenetic relationships than to the environmental conditions where they live.

Palavras-chave : Adaptations; Anatomical features; Capsiceae; Chili pepper; Taxonomy.

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