Developmental morphology and ultrastructure of Pestalotiopsis maculans

Abstract

The development of conidiomata in Pestalotiopsis maculans (Corda) Nag Raj was studied using light and transmission electron microscopy. Light microscopic studies showed the presence of pycnidial conidiomata in culture whereas the fungus is known to produce only acervular conidiomata on host leaves. One of the interesting observations is the ultrastructure of the conidial wall in the coloured cells as well as the basal and apical hyaline cells with the appendages. This investigation, which has included ultrastructural details, has thrown new light on the development of the conidiomata of P.maculans.