CARACTERÍSTICAS ANATÓMICAS DE LA HOJA Y EL TALLO DEL SEMERUCO (Malpighia emarginata DC) CULTIVADO EN DOS LOCALIDADES DEL ESTADO LARA
Anatomical characteristics of leaves and stem of Malpighia emarginata in two orchards of Lara state, Venezuela The anatomical structure of leaves and stem from M. emarginata are described. Samples were collected from two orchards at Lara state, Venezuela, with different horticultural management and environment. Standard procedures of vegetal microtechniques were followed to make sectioning. A common anatomical arrangement was observed. Leaf structure was mesomorphic and the most obvious traits were: leaf dorsiventral; veins with collateral bundles surrounded by a parenchymatous sheath; lower epidermis unilayered with paracytic stomata and 16% stomatic index. Stem anatomy was xeromorphic. Prymary growth presented vascular tissue constituting closed cylinder with abundant fibers at the upper phloem. Secondary growth presented cork superficial in origen; felodermis with choroplasts; abundant drusas in the phloem and xylem characterized by vessels solitary or in radial multiples with a small diameter, short length and low vulnerability index; axial parenchyma paratracheal; rays uniseriate to biseriate and growth ring present. We concluded that M. emarginata shows a xeromorphic strategy regarding the xylem as a response to water deficits.
Published in 2000.