Navegando por Autor "Castro, Ana Hortência Fonseca"

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    Morphological characteristics and cell viability of coffee plants calli
    (Universidade Federal de Santa Maria, 2014-04) Pádua, Marlúcia Souza; Paiva, Luciano Vilela; Silva, Luciano Coutinho da; Livramento, Kalynka Gabriella do; Alves, Eduardo; Castro, Ana Hortência Fonseca
    The a im of this research was to characterize and compare two types of calli from leaf explants of Coffea arabica (cultivar Catiguá). Cells of different types of callus were successfully characterized regarding viability and internal and external morphological characteristics. It was obtained two morphologically distinct types of callus: (i) yellow friable and (ii) transparent watery. The yellow friable calli showed higher cell viability and embryogenic characteristics. Scanning and transmission electron microscopy showed embryogenic characteristics in cells of the yellow friable calli evidenced by the presence of small and isodiametric cells, while transparent watery calli showed elongated cells and large cytoplasm vacuolization.