I am working on Alternaria isolates where I count the number to septa, measure the conidia length and conidia beak length. My confusion: do I count the septa that separates the beak and the body of the conidia as part of the number of septation of the conidia?
The knowing of the fungus comes from the sayings in the New Testament Bible Gospel of Matthew that the fruits define the tree. Saccardo used that principle in his treatment of asexual or imperfect fungal species. Beside the spore morphology the trend is to look conidial development stages or conidial oontogeny. The study of the host ranges symptomatology and ecological habits are all important criteria. The analysis of genomic relationship is also of growing interest and concern. In the foto I see 5 septa the measurement should start in the conidial base foot cell and go to apical point the width measured at the widest diameter and the narrow point in that foot cell. Alternaria probably has a monographic treatment which needs be assessed. Genomic and pathological studies are suggested as well as ecological roles as many Alternaria have saprophytic roles.
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