Mycological Progress

, Volume 16, Issue 10, pp 941–946 | Cite as

Infection by Uromyces euphorbiae: a trigger for the sporulation of endophytic Colletotrichum truncatum on the common host Euphorbia hirta

  • Érica Santos do Carmo de Souza
  • Helson Mario Martins do Vale
  • Rita de Cássia Pereira Carvalho
  • William Rosa de Oliveira Soares
  • Robert Neil Gerard Miller
  • José Carmine Dianese
Original Article
  • 153 Downloads

Abstract

The common weed Euphorbia hirta (Euphorbiaceae) grows widely across tropical and subtropical regions. In this study, plants infected by an Uromyces species displayed characteristic rust pustules delimited by a necrotic band with a reddish-brown border. Observation of leaf tissues revealed 74% of lesions encircled by a row of dark brown setose acervuli, present exclusively within the necrotic area. Acervuli were never observed in the absence of Uromyces pustules. Isolation from healthy leaf tissues revealed the fungus to be endophytic. Morphological and molecular characterization confirmed Uromyces euphorbiae as the pathogen and revealed both the endophyte and the pustule-associated fungus to be members of the Colletotrichum trucatum complex, representing the first record of this fungus on E. hirta. As understanding of the interaction between host plants, endophytes and phytopathogens is currently limited, this system constitutes a model for investigation of the physiological processes involved in this endophyte-biotrophic pathogen interaction.

Keywords

Endophyte/rust interaction Neotropical fungi Brazil Pucciniales Glomerelalles 

Notes

Acknowledgments

This work was partially funded by CNPq and MCTI-CNPq/PPBIO-Fungos do Cerrado. ESCS was supported by a fellowship from CAPES. RNGM was supported by a fellowship from CNPq. The senior author JCD was supported by a fellowship from CAPES-MEC-BRAZIL. Thanks are given to Prof. Mariza Sanchez (in memoriam) for assistance with herbarium work, and Profs. Paulo E.P.S. Câmara and Danilo B. Pinho for critically reviewing the manuscript.

Supplementary material

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Copyright information

© German Mycological Society and Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Érica Santos do Carmo de Souza
    • 1
  • Helson Mario Martins do Vale
    • 1
  • Rita de Cássia Pereira Carvalho
    • 1
  • William Rosa de Oliveira Soares
    • 1
  • Robert Neil Gerard Miller
    • 1
  • José Carmine Dianese
    • 1
  1. 1.Instituto de Ciências BiológicasUniversidade de BrasíliaBrasiliaBrazil

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