Artículos de revistas
Submicroscopical features of leaves of xyris species
Fecha
2001-12-01Registro en:
Brazilian Archives of Biology and Technology, v. 44, n. 4, p. 405-410, 2001.
1516-8913
10.1590/S1516-89132001000400011
S1516-89132001000400011
2-s2.0-33748086059
2-s2.0-33748086059.pdf
2126319926799273
Autor
Universidade Estadual Paulista (Unesp)
Institución
Resumen
The leaf infrastructure of five Xyris species were examined using scanning electron microscope (SEM), transmission electron microscope (TEM) and histochemical methods. All studied leaves show some features in epidermis and mesophyll, which were of considerable adaptative significance to drought stress. Such features included the occurrence of a pectic layer on the stomatal guard cells and the presence of a nehvork ofpectic compounds in the cuticle. Pectic compunds were also in abundance in lamellated walls of the mesophyll cells and on the inner surface of the sclerified cell walls of the vascular bundle sheaths. There were also specialized chlorenchymatous peg cells in the mesophyll and drops of phenolic compounds inside the epidermal cells.