The ontogeny and morphogenesis of sclerotia and pycnidia of Macrophomina phaseolina

Smits B.G.; Noguera, R.

Agronomia Tropical Maracay 38(4-6): 69-78


SEM and light microscopy were used. Sclerotia formation began with branching and intertwining of adjacent hyphal filaments, an increase in size of associated cells and compaction of the sclerotical mass. External cells in the peripheral hyphae collapsed, but internally sclerotia were uniformly reticulate. The pycnidial state began with the merging of hyphal filaments towards a common point, followed by the development of ringed primordia and finally pycnidia.