Pyricularia pennisetigena and P. zingibericola from invasive grasses infect signal grass, barley and wheat

Juliana Teodora   de Assis Reges; Matheus Mereb   Negrisoli; Adriano Francis   Dorigan; Vanina Lilián   Castroagudín; João Leodato   Nunes Maciel; Paulo Cezar   Ceresini

Pyricularia pennisetigena and P. zingibericola from invasive grasses infect signal grass, barley and wheat

Autores

Juliana Teodora de Assis Reges

Matheus Mereb Negrisoli

Adriano Francis Dorigan

Vanina Lilián Castroagudín

João Leodato Nunes Maciel

Paulo Cezar Ceresini

Editor

Universidade Federal de Goiás

Descripción

Fungal species from the Pyricularia genus are associated with blast disease in plants from the Poaceae family, causing losses in economically important crops such as rice, oat, rye, barley, wheat and triticale. This study aimed at characterizing the pathogenicity spectrum of P. pennisetigena and P. zingibericola to signal grass, barley and wheat, as well as comparing them with those from the species P. grisea and P. oryzae pathotype Triticum , which occur widely in the Brazilian agroecosystem. Twenty isolates of Pyricularia spp. were obtained from infected leaf samples of invasive plant species from wheat fields. The isolates classification into distinct Pyricularia species was done using molecular phylogeny based on actin and calmodulin genes. Pyricularia pennisetigena and P. zingibericola inoculated on plant leaves, at a concentration adjusted to 10 5 conidia mL -1 , were pathogenic to signal grass, barley and wheat, with varying levels of aggressiveness.