A. Asexual reproduction in Neurospora:
a) By culture:
- Placing a fragment of the threadlike hyphae of a mycelium of the fungus on a suitable culture medium.
- Each hyphae is segmented and each segment usually contains more than haploid nucleus.
b) By conidia:
- Conidia helps in formation of new mycelia.
Sexual reproduction in Neurospora:
- Usually takes place by ascospore.
- Conidia acts as male gamete and trichogyne acts as female organ.
- When a conidium from one mating type contacts a receptive trichogyny of the opposite mating type, it moves into the fruiting body, dividing mitotically as it goes alone, and fertilizes a no. of maternal nuclei.
- Diploid sexual zygotes are thus formed that are each enclosed in an oval ascus sac.
- The zygote in each ascus immediately divides meiotically to yield 4 haploid cells which then under goes a single mitosis to furnish a total of 8 haploid cells per ascus called ascospore.
- The ascospore is haploid and grows directly into a new mycelium.
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