Describe reproduction by spores in Rhizopus
Answers
Rhizopus is the species of a fungus. They reproduce asexually by the formation of the spores. The body of the fungus is composed of the hyphae which develop the sporangium. The sporangium is a swollen structure at the tip of the filaments bearing the spores. The spores are tough and resistant structures which are dispersed by the breaking of the sporangium. When the conditions are favourable, then these spores germinate and develop to form new fungal filaments.
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Ithere is a practical for this. As following:
Materials required:moist slice of bread , petridish, magnifying glass.
Procedure : wet a slice of bread in water and place it in a petridish. Keep the moist slice of bread in a warm and dark place for 7-8 days. Observe tha slice daily with the help of a magnifying glass.
Observation and conclusion : a white cottony mass appears on the surface of moist bread which turns black within few days. The white cottony mass is due to growth of bread mould (rhizopus). The spores of fungus are present in the air. They settle on the moist bread and germinate to form white cottony mass of vegetative mycelium. The vegetative mycelium developes asexual soprangia which are black in colour. Each soprangia contains hundreds of minute black - coloured spores. These spores are dispersed in air to germinate on suitable substratum.