Uredinales no Estado do Pará; O gênero Puccinia Persoon.

Abstract

Fungi of the order Uredinales are known as "plant rust" and are obligatory parasites of higher plants, showing a high levei of specifícity in their host associations. The genus Puccinia, placed in the family Pucciniaceae of the Uredinales, has the largest number ofknown species, with some 4000 representatives. This study provides a survey of Puccinia from the northem Brazilian state of Pará, based on published catalogs and the examination of specimens housed in the herbaria of the Museu Paraense Emílio Goeldi (MG), the Instituto Agronômico do Norte (IAN), the Instituto Biológico de São Paulo (IBSP) and the Royal Boíanical Gardens of Belgium (BR). For taxonomic identification, host data, macroscopic plant pathologies and microscopic examination of fungai structures in semi-permanent preparations of sori and spores in heated lacto-phenoic solution. In addition, the specialized literature was consulted, as were identifíed specimens from the MG herbarium. In total, 32 Puccinia species were identified from the state of Pará; Puccinia arachidis Spegazzini var. arachidis, Puccinia arachidis Spegazzini var. offuscata (Arthur) Cummins, Puccinia arechavaletae Spegazzini, Puccinia bambusarum Arthur, Puccinia borreriae P. Sydow & H. Sydow, Puccinia boutelouae (Jennings) Holway, Puccinia claviformis Lagerheim, Puccinia cnici-oleraceae Persoon ex Desmazieres, Puccinia cucumeris P. Henrungs, Puccinia cynanchi Berkeley & Curtis, Puccinia cyperi Arthur, Puccinia emaculata Schweinitz, Puccinia fallax Arthur in Mains, Puccinia flavo-virens Jackson & Holway, Puccinia gesneracearum Dietel, Puccinia heliconia Arthur, Puccinia heteropteridis Thuemen, Puccinia heterospora Berkeley & Curtis, Puccinia huberi P. Hennings, Puccinia insueta Winter, Puccinia justiciae Puttemans, Puccinia lateritia Berkeley & Curtis, Puccinia minuta Dietel, Puccinia negrensis P. Hennings, Puccinia oahuensis Ellis & Everhart, Puccinia palicoureae Mains, Puccinia paraensis Dietel, Puccinia peperomiae, Puccinia polysora Underwood, Puccinia psidii Winter, Puccinia scleriae (Pazschke) Arthur, Puccinia spegazzinii DeToni in Saccardo e Puccinia thaliae Dietel. These species parasitíze host plants belonging to 20 families and 33 genera. The families of host plants represented better are Poaceae, Asteraceae, Cyperaceae e Rubiaceae.