Etude ultrastructurale et cytochimique de l'appareil sporifère chez Phialophora richardsiae

Abstract

The observation with the electron microscope of specimens during conidium initiation reveals the enteroblastic nature of the conidial prefiguration. The morphological characteristics expressed during the other stages of conidiogenesis (conidium maturation and propagule liberation) are also studied. The cytochemical techniques (showing the presence of polysaccharidic and proteinic substances) confirm our conclusions on the nature of the newly formed primary sporal envelope and show an identical wall structure whatever the organ studied.A comparison with the functioning of other types of phialides is made and a relationship between the phialoconidiogenesis (Phialophora richardsiae (Nannf.) Conant.) and the annello-conidiogenesis (Doratomyces purpureofuscus), based on the similarity of conidium initiation mechanisms, is accepted.

Morphologie et Ultrastructure de la Corémie chez le <i>Sphaerostilbe repens</i>

“…A 1'appui de cette these, il a ete montre que chez le Phialophora richardsiae et le Beauveria bassiana, les ornementations et la zone mucilagineuse de la paroi conservent les memes caracteristiques cytochimiques (Olah et Reisinger 1974, Reisinger et Olah 1974. En ce qui noun concerne, nous avons seulement montre que les deux formations reagissent a la reaction de Thiery.…”