First report of Nigrospora vesicularifera causing foot rot on sweet potato in Brazil

Colonies with similar morphological characteristics to the genus Nigrospora were isolated from stems and tubers of sweet potato plants showing characteristic symptoms of foot rot disease, collected in the agricultural region of Lagoa dos Gatos, Pernambuco, Brazil. The pathogenicity test was carried...

Full description

Saved in:

Bibliographic Details
Published in:	Crop protection Vol. 166; p. 106171
Main Authors:	Almeida, Thaís Regina Pintino De, Coelho, Iwanne Lima, Vasconcelos, Leirson Salvador Bezerra, Silva, Elder Felipe De Moura, Barros, Letícia Rebeca De Araújo, Pontes, Maria Aparecida, Dos Santos, Tarciana Silva, Vieira, Willie Anderson Dos Santos, Câmara, Marcos Paz Saraiva, Laranjeira, Delson
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 01-04-2023
Subjects:	Foot rot Molecular biology Plant pathology Molecular biology Plant pathology Foot rot
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	Colonies with similar morphological characteristics to the genus Nigrospora were isolated from stems and tubers of sweet potato plants showing characteristic symptoms of foot rot disease, collected in the agricultural region of Lagoa dos Gatos, Pernambuco, Brazil. The pathogenicity test was carried out by inoculating the isolates in sweet potato tubers (Co-Branca variety). The inoculated tubers showed symptoms similar to those of the foot rot observed in the field, producing brown lesions that turned black and yellowing of the leaves. After the colonies were re-isolated, the fungal structures were observed under a microscope for morphological characterization. Species recognition was carried out by sequencing the internal transcribed spacer region (ITS) and the translation elongation factor (TEF1-α) of the isolates, followed by phylogenetic comparison with sequences of recognized species. The phylogenetic analyses supported the identification of the isolates as Nigrospora vesicularifera, generating the first worldwide report of N. vesicularifera in sweet potato and the first record of this pathogen in a plant host in Brazil. •Identification of new causal agents of foot rot of sweet potato.•Symptomatology of foot rot of sweet potato.•Nigrospora vesicularifera is identified as another causal agent of foot rot of sweet potato.
ISSN:	0261-2194 1873-6904
DOI:	10.1016/j.cropro.2022.106171