ORIGINAL ARTICLE
Rhizospheric Penicillium and Talaromyces strains in Austrocedrus chilensis native forests: identification and evaluation of biocontrol candidates against the pathogen Phytophthora austrocedri
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Maria Laura Vélez 3,4, A,E-F
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Ricardo Comerio 5, A,C,E
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Ana Gallo 1,6, B-C,E
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Stella Romero 2, A-C,E-F
 
 
 
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1
Phytopathology and applied microbiology, Centro de Investigación y Extensión Forestal Andino Patagónico (CIEFAP), Argentina
2
., Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
3
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Phytopathology and applied microbiology, Centro de Investigación y Extensión Forestal Andino Patagónico (CIEFAP), Argentina
4
Facultad de Ingeniería y Facultad de Ciencias Naturales y Ciencias de la Salud, Universidad Nacional de la Patagonia San Juan Bosco (UNPSJB), Argentina
5
Estación Experimental Agropecuaria Anguil “Ing. Agr. Guillermo Covas”, Instituto Nacional de Tecnología Agropecuaria (INTA), Argentina
6
Fondo para la Investigación Científica y Tecnológica (FONCYT), Agencia Nacional de Promoción de la Investigación, el Desarrollo Tecnológico y la Innovación (Agencia I+D+I), Argentina
A - Research concept and design; B - Collection and/or assembly of data; C - Data analysis and interpretation; D - Writing the article; E - Critical revision of the article; F - Final approval of article
CORRESPONDING AUTHOR
Maria Laura Vélez   

Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Phytopathology and applied microbiology, Centro de Investigación y Extensión Forestal Andino Patagónico (CIEFAP), Ruta 259 km 16.24, 9200, Esquel, Argentina
Submission date: 2022-12-27
Acceptance date: 2023-03-22
Online publication date: 2023-04-04
 
 
HIGHLIGHTS
  • Penicillium is the dominant genus in rhizospheric funga associated with Austrocedrus chilensis
  • Some species of Penicillium inhibits Phytophthora austrocedri growth
  • Penicillium community may vary between healthy sites and sites affected by P. austrocedri
  • Penicillium species could be used in a formulation of a control strategy
KEYWORDS
TOPICS
ABSTRACT
The aims of this study were to prospect Penicillium and Talaromyces species associated with Austrocedrus chilensis in sites with and without Austrocedrus Root Disease (ARD), which is caused by the pathogen Phytophthora austrocedri; and to find Penicillium sp. strains with biocontrol activity against this disease. Isolations from sites with and without the prevalence of ARD were made, and the obtained isolates were phenotypically and molecularly identified to species level. Several Penicillium species were isolated from all sites; five of them were exclusively isolated from sites with ARD. Penicillium communities were compared through multivariate analyses; communities were more complex in sites with ARD. Biocontrol activity of Penicillium and Talaromyces isolates was evaluated using co-cultures with Ph. austrocedri. Penicillium glabrum, T. amestolkiae, P. palitans, and P. crustosum showed the highest biocontrol effect. Our results highlight that Penicillium species have high biocontrol activity, which also reinforces the hypothesis that some Penicillium species could be used in formulating a control strategy.
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
eISSN:1899-007X
ISSN:1427-4345