"RUST FUNGI (PUCCINIALES) ON PLANTS OF THE MAGNOLIIDS CLADE IN BRAZILIAN AMAZON"
Basiodiomycota, Pucciniomycetes, Annonaceae, Piperaceae.
The order Pucciniales represents a numerous and complex group of fungi among the Basidiomycota. They are responsible for causing rusts in plants, maintaining the characteristic of specificity in relation to the family and genus of the host plant for each species. In Brazil, there are records for all biomes, with about 184 species in the Amazon. They occur parasitizing various plant taxa, among which are important phytopathogens in families of the Magnoliids clade, with emphasis on the pathogen-host relationship in the Annonaceae family, which has recognized economic importance in the Amazon. The present work aimed to conduct a taxonomic study of Pucciniales associated with plants of the Magnoliids clade (Annonaceae and Piperaceae), from collections from the Brazilian Amazon. Theworkwasbasedonsamples available intheMycology Laboratory of MPEG, review of the fungal and botanical collections of the João Murça Pires (MG), Embrapa Amazônia Oriental (IAN) and Amapaense (HAMAB) herbaria, morphological analysis of microstructures under microscopy and bibliographic survey. The occurrence of 16 species of Pucciniales parasitizing plants of the Annonaceae families (Aecidium amazonense, A. dugettiae, A. guatteriae, A. juruense, A. xylopiae, Dasyspora amazonica, D. echinata, D. ferrugineae, D. gregaria, D. nitidae, D. segregaria, Dietelia duguetiae and Phakopsora rollinia) and Piperaceae (Crossopsora piperis and Puccinia peperomiae). We present the first taxonomic update of species of the genus Dasyspora on Xylopia (Annonaceae) occurring in Amazonia, with new recordsfor Brazil (D. nitidae and D. ferrugineae) and for Amazonia (D. echinata).Newrecords were identified forthe states of Amapá (A. dugettiae, A. juruense, A. xylopiae and Dietelia duguetiae) Pará (D. amazonica) Mato Grosso (D. amazonica) and Rondônia (A. amazonense, A. juruense, D. gregaria). Identification keys were proposed for the species of the genus Dasyspora, as well as for the other species that occurred in the families Annonaceae and Piperaceae. For all species representing new records, descriptions, illustrations, taxonomic comments, and geographic distribution are provided. This study emphasizes the importance of performing taxonomic revisions on species complexes deposited in herbaria and expands the knowledge of the Funga of the Amazon biome.