Interruption of an MSH4 homolog blocks meiosis in metaphase I and eliminates spore formation in Pleurotus ostreatus
Fig 4
Microscopic pictures of different stages of meiosis in basidia of the sporulating of sporulating and non-sporulating strains.
Sp+ dikaryon (A). Binucleated basidium (a), Nuclear fusion (b), Metaphase I—Anaphase I (c), Metaphase I—Anaphase I (d), Telophase I (e), Meta-anaphase II (f, g), Nuclei migrating to spores (h), Binucleate spores after meiotic division (i), and Sp- dikaryon (B). Binucleated basidium (a), Nuclear fusion (b), Different examples of metaphase I (c1-c4). Beyond this stage no examples have been found indicating that meiosis is halted at this stage (Giemsa staining; 100x magnification).