The plant hormone salicylic acid interacts with the mechanism of anti ‐ herbivory conferred by fungal endophytes in grasses

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The plant hormone salicylic acid (SA) is recognized as an effective defence against biotrophic pathogens, but its role as regulator of beneficial plant symbionts has received little attention. We studied the relationship between the SA hormone and leaf fungal endophytes on herbivore defences in symb...

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Detalles Bibliográficos
Otros Autores: Bastías, Daniel A., Martínez Ghersa, María Alejandra, Newman, Jonathan A., Card, Stuart D., Mace, Wade J., Gundel, Pedro Emilio
Formato: Artículo
Lenguaje:Inglés
Materias:
ALKALOIDS
BENEFICIAL MICROORGANISMS
BIOTROPHS
ENDOPHYTE SYMBIOSIS
EPICHLOË
PLANT DEFENCES
SAP ‐ SUCKING INSECT
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2018bastias.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
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245 1 0 |a The plant hormone salicylic acid interacts with the mechanism of anti ‐ herbivory conferred by fungal endophytes in grasses 
520 |a The plant hormone salicylic acid (SA) is recognized as an effective defence against biotrophic pathogens, but its role as regulator of beneficial plant symbionts has received little attention. We studied the relationship between the SA hormone and leaf fungal endophytes on herbivore defences in symbiotic grasses. We hypothesize that the SA exposure suppresses the endophyte reducing the fungal ‐ produced alkaloids. Because of the role that alkaloids play in anti ‐ herbivore defences, any reduction in their production should make host plants more susceptible to herbivores. Lolium multiflorum plants symbiotic and nonsymbiotic with the endophyte Epichloë occultans were exposed to SA followed by a challenge with the aphid Rhopalosiphum padi. We measured the level of plant resistance to aphids, and the defences conferred by endophytes and host plants. Symbiotic plants had lower concentrations of SA than did the nonsymbiotic counterparts. Consistent with our prediction, the hormonal treatment reduced the concentration of loline alkaloids (i.e., N ‐ formyllolines and N ‐ acetylnorlolines) and consequently decreased the endophyte ‐ conferred resistance against aphids. Our study highlights the importance of the interaction between the plant immune system and endophytes for the stability of the defensive mutualism. Our results indicate that the SA plays a critical role in regulating the endophyteconferred resistance against herbivores. 
653 |a ALKALOIDS 
653 |a BENEFICIAL MICROORGANISMS 
653 |a BIOTROPHS 
653 |a ENDOPHYTE SYMBIOSIS 
653 |a EPICHLOË 
653 |a PLANT DEFENCES 
653 |a SAP ‐ SUCKING INSECT 
700 1 |9 67139  |a Bastías, Daniel A.  |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. 
700 1 |9 7113  |a Martínez Ghersa, María Alejandra  |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. 
700 1 |9 67696  |a Newman, Jonathan A.  |u University of Guelph. Department of Integrative Biology. Guelph, Canada. 
700 1 |9 67697  |a Card, Stuart D.  |u Grasslands Research Centre. Forage Science. AgResearch Limited. Palmerston North, New Zealand. 
700 1 |9 67698  |a Mace, Wade J.  |u Grasslands Research Centre. Forage Science. AgResearch Limited. Palmerston North, New Zealand. 
700 1 |9 28667  |a Gundel, Pedro Emilio  |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. 
773 0 |t Plant, cell and environment  |w SECS000149  |g Vol.41, no.2 (2018), p.395-405, grafs. 
856 |f 2018bastias  |i en reservorio  |q application/pdf  |u http://ri.agro.uba.ar/files/intranet/articulo/2018bastias.pdf  |x ARTI201808 
856 |z LINK AL EDITOR  |u https://www.wiley.com 
942 |c APUNTE0D 
942 |c ENLINEA 
976 |a AAG 

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