Abstract

PEREZ CUADRA, Vanesa  and  CAMBI, Viviana N. Ocurrencia de caracteres anatómicos funcionales foliares y caulinares en 35 especies xero-halófilas. Bol. Soc. Argent. Bot. [online]. 2014, vol.49, n.3, pp.347-359. ISSN 1851-2372.

The varied vegetation of the salt marshes develops specific strategies to address factors that limit growth. To inquire about these adaptive mechanisms, leaf and caulinar anatomy was studied in 35 species inhabiting the Salitral de la Vidriera (Prov. Buenos Aires), using traditional histological techniques. A few species have thick cuticle while much of them have thickened walls of epidermal cells. Most leaves are amphistomatic, presenting some species protected stomata. Only three species have salt glands. There is a scarce development of sclerenchymatic tissue at leaf level, while the stems have a great proportion of sclerenchyma and collenchyma. Overall both organs have aqueous tissue. The most commonly type of leaf anatomy is isolateral mesophyll, the dorsiventral, Kranz and central structure are less frequent. Stems of three species have endodermis. Several species develop an early secondary growth, and in some is observed an atypical secondary growth by the differentiation of master cambium. In this work, which is the first morphoanatomical study in southwest salt marshes of Buenos Aires, it was found that the occurrence of functional anatomical characters is more diverse in leaves than in stems.

Keywords : Xero-halophytes; Ecological anatomy; Salt marshes.

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