Tropical Plant Pathology
Print version ISSN 1982-5676
MELO, Maruzanete P.; CARVALHO JUNIOR, Aníbal A.; SANTOS, Paulo C.M. and LIMA, Cristiano S.. Malva sylvestris, new host of Puccinia heterospora in Brazil. Trop. plant pathol. [online]. 2012, vol.37, n.1, pp. 80-82. ISSN 1982-5676. http://dx.doi.org/10.1590/S1982-56762012000100010.
A rust was observed attacking Malva sylvestris plants in Garanhuns, state of Pernambuco, Brazil. The fungus involved was identified as Puccinia heterospora. This is a microcyclic species and has only the sexual stage: teliospores. Such teliospores are of two kinds in this species: bicellular typical of Puccinia and unicellular Uromyces-like (mesospores), which are abundantly produced in that species. This rust species has a broad geographical distribution and infects plants belonging to the family Malvaceae. This is the first report of P. heterospora attacking a species belonging to the genus Malva in Brazil. A representative specimen was deposited in the Herbarium Dimitri Sucre Benjamin of the Instituto de Pesquisas Jardim Botânico do Rio de Janeiro (JBRJ-RB). Herein are presented the description of the fungal morphology, illustrations and comments about the distinction of this species from morphologically similar rust species.
Keywords : rust; Malvaceae; Pucciniales; teliospores.