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Pest Manag Sci

Title:		"In a belowground multitrophic interaction, Trichoderma harzianum induces maize root herbivore tolerance against Phyllophaga vetula"
Author(s):		Contreras-Cornejo HA; Macias-Rodriguez L; Real-Santillan RO; Lopez-Carmona D; Garcia-Gomez G; Galicia-Gallardo AP; Alfaro-Cuevas R; Gonzalez-Esquivel CE; Najera-Rincon MB; Adame-Garnica SG; Rebollar-Alviter A; Alvarez-Navarrete M; Larsen J;
Address:		"Instituto de Investigaciones en Ecosistemas y Sustentabilidad, Universidad Nacional Autonoma de Mexico (UNAM), Morelia, Mexico. Instituto de Investigaciones Quimico-Biologicas, Universidad Michoacana de San Nicolas de Hidalgo, Ciudad Universitaria, Morelia, Mexico. Instituto de Investigaciones Agropecuarias y Forestales, Universidad Michoacana de San Nicolas de Hidalgo, Morelia, Mexico. Instituto de Investigaciones en Ciencias de la Tierra, Universidad Michoacana de San Nicolas de Hidalgo, Ciudad Universitaria, Morelia, Mexico. Instituto Nacional de Investigaciones Forestales, Agricolas y Pecuarias, Campo Experimental Uruapan, Uruapan, Mexico. Universidad Autonoma Chapingo, Centro Regional Universitario Centro Occidente, Morelia, Mexico. Departamento de Ingenieria Quimica y Bioquimica, Instituto Tecnologico de Morelia, Morelia, Mexico"
Journal Title:		Pest Manag Sci
Year:		2021
Volume:		20210427
Issue:		9
Page Number:		3952 - 3963
DOI:		10.1002/ps.6415
ISSN/ISBN:		1526-4998 (Electronic) 1526-498X (Linking)
Abstract:		"BACKGROUND: Trichoderma spp. are soil fungi that interact with plant roots and associated biota such as other microorganisms and soil fauna. However, information about their interactions with root-feeding insects is limited. Here, interactions between Trichoderma harzianum and the root-feeding insect Phyllophaga vetula, a common insect pest in maize agroecosystems, were examined. RESULTS: Applications of T. harzianum and P. vetula to the root system increased and decreased maize growth, respectively. Induced tolerance against herbivore attack was provided by T. harzianum maintaining a robust and functional root system as evidenced by the increased uptake of Cu, Ca, Mg, Na and K. Herbivore tolerance also coincided with changes in the emission of root volatile terpenes known to induce indirect defense responses and attract natural enemies of the herbivore. More importantly, T. harzianum induced de novo emission of several sesquiterpenes such as beta-caryophyllene and delta-cadinene. In addition, single and combined applications of T. harzianum and P. vetula altered the sucrose content of the roots. Finally, T. harzianum produced 6-pentyl-2H-pyran-2-one (6-PP) a volatile compound that may act as an antifeedant-signaling compound mitigating root herbivory by P. vetula. CONCLUSION: Our results provide novel information about belowground multitrophic plant-microbe-arthropod interactions between T. harzianum and P. vetula in the maize rhizosphere resulting in alterations in maize phenotypic plant responses, inducing root herbivore tolerance"
Keywords:		Animals *Herbivory Hypocreales Plant Roots *Trichoderma Zea mays plant defense root herbivory secondary metabolites terpenes;
Notes:		"MedlineContreras-Cornejo, Hexon Angel Macias-Rodriguez, Lourdes Real-Santillan, Raul Omar Lopez-Carmona, Dante Garcia-Gomez, Griselda Galicia-Gallardo, Ana Paola Alfaro-Cuevas, Ruth Gonzalez-Esquivel, Carlos E Najera-Rincon, Miguel Bernardo Adame-Garnica, Sandra Goretti Rebollar-Alviter, Angel Alvarez-Navarrete, Mariana Larsen, John eng Consejo Nacional de Ciencia y Tecnologia/ 165738/Consejo Nacional de Ciencia y Tecnologia/ 179319/Consejo Nacional de Ciencia y Tecnologia/ England 2021/04/15 Pest Manag Sci. 2021 Sep; 77(9):3952-3963. doi: 10.1002/ps.6415. Epub 2021 Apr 27"