<strong><em>Pseudopestalotiopsis gilvanii sp. nov.</em> and <em>Neopestalotiopsis formicarum</em> leaves spot pathogens from guarana plant: a new threat to global tropical hosts</strong>

• DOI: 10.11646/phytotaxa.489.2.2
• Publication Date: 2021-03-04T03:54:27Z
• Authors: GILVANA F. GUALBERTO; ARICLÉIA DE M. CA...; THIAGO F. SOUSA; JEFERSON C. CRUZ; ROGÉRIO E. HANADA; FERNANDA F. CANIATO; GILVAN F. SILVA
• Keywords: Pathogenic fungus; Mycosphaerella; Elaeis guineensis

Pestalotioid species (Pestalotiopsis, Pseudopestalotiopsis and Neopestalotiopsis) cause extremely damaging diseases in a wide range of hosts across the word. Recently, pestalotioid strains isolated from damaged guarana leaf tissue were subject to morphological molecular characterization. Six monosporic isolates obtained analysed based on following conidial characters: length, width, septation, absence or presence basal appendage, number length apical appendages. For phylogenetic inference, sequences Internal Transcribed Spacer region (ITS), partial genes encoding translation elongation factor 1-α (tef1-α) β-tubulin (tub2) used. Three out six identified as Neopestalotiopsis formicarum, while three other are described here new Pseudopestalotiopsis, named Ps. gilvanii sp. nov.. The pathogenicity N. formicarum confirmed Koch’s postulate. Besides guarana, potential formicaram economically important tropical plants investigated. was pathogenic açaí palms (Euterpe oleracea, E. precatoria), oil palm (Elaeis guineensis), but not banana (Musa paradisiaca var. pacovan) rubber trees (Hevea brasiliensis). tested. To our knowledge this is first report plant pathogen plant, novel capable causing disease crops regions.