Question

Recurrent apomixis involves

• A. Generative apospory
• B. Somatic apospory
• C. Both (A) and (B)
• D. None of the above

Answer 1

The correct option is C Both (A) and (B)

Two different types of agamospermy have been recognized based on whether the embryo develops from a cell of the unreduced female gametophyte (gametophytic agamospermy) or directly from diploid sporophytic cells of the ovule such as nucellus or integuments (sporophytic or adventive embryony).
In gametophytic apomixis, an unreduced embryo sac develops from the megaspore mother cell by circumvention of meiosis (diplospory) or directly from a cell in the nucellus (somatic apospory). In apospory, megaspore mother cell is not differentiated and diploid somatic cell acts as a spore. In adventive embryony, spore itself is not differentiated. When embryo develops directly from a diploid egg the process is also called as recurrent agamospermy or generative apospory.