The Penicillium strains 414T, 415 and 416 displayed identical
colony and microscopic morphologies. On the basis of
their micro- and macromorphological features, these three
Penicillium isolates appeared to be most closely related to P.
raistrickii G. Smith. The similarities we observed included: a
velvety, or nearly velvety, colony surface on CYA that was
radiately sulcate, with white floccose aerial hyphae; roughened
conidiophore walls; the presence of bi- and terverticillate
penicilli; spheroidal conidia with smooth, or nearly
smooth, walls; well-developed globose to subglobose sclerotia.
Other morphological characteristics were, however,
distinguishable. The most noticeable differences between
these three Penicillium isolates and P. raistrickii were: on
CYA, a colony surface that was radiately sulcate with few
furrows and reversed colouring (fromlight yellow to brown);
the presence of light brown exudates; on MEA, the presence
of the centre overlaid with sectors of shallow radiating
white sterile hyphae; penicilli that were often terverticillate,
yielding conidiophores that were less rugose with shorter
stipes, metulae and phialides and with bigger conidia.
The Penicillium strains 414T, 415 and 416 displayed identicalcolony and microscopic morphologies. On the basis oftheir micro- and macromorphological features, these threePenicillium isolates appeared to be most closely related to P.raistrickii G. Smith. The similarities we observed included: avelvety, or nearly velvety, colony surface on CYA that wasradiately sulcate, with white floccose aerial hyphae; roughenedconidiophore walls; the presence of bi- and terverticillatepenicilli; spheroidal conidia with smooth, or nearlysmooth, walls; well-developed globose to subglobose sclerotia.Other morphological characteristics were, however,distinguishable. The most noticeable differences betweenthese three Penicillium isolates and P. raistrickii were: onCYA, a colony surface that was radiately sulcate with fewfurrows and reversed colouring (fromlight yellow to brown);the presence of light brown exudates; on MEA, the presenceof the centre overlaid with sectors of shallow radiatingwhite sterile hyphae; penicilli that were often terverticillate,yielding conidiophores that were less rugose with shorterstipes, metulae and phialides and with bigger conidia.
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