Antagonistic Activity of Chilean Strains of Pseudomonas protegens Against Fungi Causing Crown and Root Rot of Wheat (Triticum aestivum L.)

Frontiers in Plant Science
María Paz Castro TapiaErnesto A Moya-Elizondo

Abstract

Seed treatments with antagonistic bacteria could reduce the severity of crown and root rot diseases in wheat crops. The objective of this study was to evaluate the potential antagonistic activity of a bacterial consortium of three Chilean strains of Pseudomonas protegens against the wheat crown and root rot pathogens Gaeumannomyces graminis var. tritici, Rhizoctonia cerealis, and Fusarium culmorum. Two field experiments were carried out on artificially infested soil during two consecutive seasons (2016-2017 and 2017-2018) in an Andisol soil of southern Chile. Control treatments (not inoculated with fungi) were also included. Each treatment included a seed treatment of spring wheat cv. Pantera-INIA with and without the bacterial consortium. Both phytosanitary damage (incidence and severity) and agronomic components were evaluated. Bacterial populations with the phlD+ gene in the wheat plant rhizosphere during anthesis state (Z6) were also quantified. In both seasons, infection severity decreased by an average of 16.8% in seeds treated with P. protegens consortium, while yield components such as spikes m-1 and number of grains per spike increased. The use of antagonistic bacteria resulted in a total yield increase only during the...Continue Reading

References

Nov 30, 2011·Phytopathology·Ivan Simko, Hans-Peter Piepho
Jan 3, 2013·Molecular Plant Pathology·Barbara SchermQuirico Migheli
Jun 8, 2013·Frontiers in Plant Science·Nicolas DenancéAntonio Molina
Jun 1, 2013·The Plant Pathology Journal·Youn-Sig Kwak, David M Weller
Oct 14, 2014·Trends in Plant Science·Barbara De ConinckKemal Kazan
Jan 13, 2018·Frontiers in Microbiology·Ruth Gómez ExpósitoJos M Raaijmakers
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Oct 5, 2018·Frontiers in Microbiology·Paola DuránMaría José Pozo
Aug 1, 2007·Plant Disease·A C HoggA T Dyer

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