Secreciones intravasculares de sustancias gomosas de Cercidium praecox (Fabaceae)

Abstract

THE SECRETORY MECHANISM OF GUMMOUS SUBSTRANCES IN SECONDARY XYLEM OF CERCIDIUM PRAECOX (RUIZ ET PAV.)HARMS GROWING IN CORDOBA, ARGENTINA IS STUDIED. SECRETION OF GUMMOUS SUBSTANCES BEGINS IN PARENCHYMA CELLS AROUND VESELS, ENDING WITH THE TOTAL OR PARTIAL OCCLUSSION OF THE VESSEL LUMINA, WHERE A TRAUMATISM OCCURS. THE RELATIONSHIP TO BIOTIC AGENTS SUCH AS FUNGI, AS WELL AS ITS POSSIBLE ECOLOGICAL SIGNIFICANCE ARE DISCUSSED.