Cytology of Teliospore Germination and Basidiospore Formation in Uromyces appendiculatus var. appendiculatus

The cytology of teliospore germination and basidiospore formation in Urornyces appendiculatus vat. appendieulatus was characterized with light and fluoroscence microscopy. Meiosis of the diploid nucleus occurred in the metabasidium. The four haploid daughter nuclei migrated into the basidiospore initials where they underwent a post meiotic mitosis. Each basidiospore was delimited from the meatabasidium by a septum at the apex of the sterigrna. Seventy-five percent of mature basidiospores were binucleate, 24.5% uulnucleate, and 0.5% trinucleate