Etude de l'origine et de la répartition des granules vacuolaires dans les hyphes d'une endomycorhize à vésicules et arbuscules

Abstract

Summary The authors have observed three different types of inclusions in hyphae of the endophyte: dense vacuolar granules, less dense and often diffuse vacuolar granules and granules included in small cytoplasmic vesicles. These inclusions were studied by cytochemical techniques and by energy electron loss spectroscopy. Dense granules correspond to polyphosphate granules already described by many authors. They contain phosphorus and calcium associated with a proteic fraction. Cytoplasmic granules and diffuse vacuolar granules are protein-rich inclusions without phosphorus and calcium. The authors suggest that the cytoplasmic inclusions are precursors of polyphosphate granules. These inclusions are contained in unknown origin vesicles. The diffuse protein-rich vacuolar granules are the remaining of polyphosphate granules after the transfer of phosphorus to the host. The polyphosphate granules are common in intracellular hyphae, but more rare and often absent in the hyphae of the arbuscule. For the authors,...