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Onion black mould - Aspergillus niger (CHONG_TzeKiu)
Updated on 05/12/2017

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(I had found some black mould growing on the onion residue accidentally left somewhere in my hostel, which was then brought to the lab for an observation under microscope.)
This black mould is A. niger, which is an ascomycete, growing on onion. It looks similar to the bread mould, which is also black in color, and have a ball-like structure with a stalk. However, if observe carefully under the microscope, the 'ball-like' structure of the onion mold is composed of the conidia, which are not enclosed by enclosure, unlike the zygomycete bread mould, which spores are contained within sporangia.

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Interesting! And glad that you have tried to apply your knowledge to your daily life. Yet how can you know it is Aspergillus niger? Identification of asexual ascomycetes require more detailed observation of the branching pattern of conidiophores.

by Cherry_Chow (Teacher) at 2017-12-14 10:11:19

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petal , sepal , pileus , pistil , suspensor , stipe , epidermis , ovule , Labellum , stamen

Onion black mould - Aspergillus niger (CHONG_TzeKiu) Updated on 05/12/2017

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Onion black mould - Aspergillus niger (CHONG_TzeKiu)
Updated on 05/12/2017