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Biological control of Rhizoctonia solani in cowpea plants using yeast

Authors
  • de Tenório, Dyana A.1
  • de Medeiros, Erika Valente2
  • Lima, Cristiano S.3
  • da Silva, Jéssica M.2
  • de Barros, Jamilly A.2
  • Neves, Rejane P.4
  • Laranjeira, Delson1
  • 1 Universidade Federal Rural de Pernambuco, Dep. de Agronomia, Recife, PE, Brazil , Recife (Brazil)
  • 2 Universidade Federal Rural de Pernambuco, Garanhuns, PE, Brazil , Garanhuns (Brazil)
  • 3 Universidade Federal do Ceará, Dep. de Fitotecnia, Fortaleza, CE, Brazil , Fortaleza (Brazil)
  • 4 Universidade Federal de Pernambuco, Dep. de Micologia, Recife, PE, Brazil , Recife (Brazil)
Type
Published Article
Journal
Tropical Plant Pathology
Publisher
Springer International Publishing
Publication Date
Feb 27, 2019
Volume
44
Issue
2
Pages
113–119
Identifiers
DOI: 10.1007/s40858-019-00275-2
Source
Springer Nature
Keywords
License
Yellow

Abstract

Yeasts have been used to manage a large number of plant diseases, but little is known about the mechanisms used by these biocontrol agents. The objectives of the present study were to evaluate the antagonistic effect of yeasts against Rhizoctonia solani and possible mechanisms of action in cowpea plants. Seventy yeast isolates were obtained from leaf, root and stem tissues of cowpea and common bean plants. Screening experiments were conducted in a greenhouse at temperatures ranging from 15 to 26 °C in the first and from 22 to 31 °C in the second experiment. Candida saopaulonensis C6A, Cryptococcus laurentii FVC10 and Bullera sinensis FVF10 (R1) reduced disease severity by 57.4%, 48.5% and 66.3%, respectively. Cowpea plants treated with FVF10 (R1) showed the highest peroxidase and catalase activities. The mechanisms of action were based on competition and induction of enzymes such as peroxidase, catalase and ascorbate peroxidase in cowpea. Candida saopaulonensis C6A, C. laurentii FVC10 and B. sinensis FVF10 (R1) are potential biocontrol agents of damping-off and stem rot caused by R. solani on cowpea plants.

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