Long-lasting primed state in maize plants: Salicylic acid and steroid signaling pathways as key players in the early activation of immune responses in silks

In the present study, we investigated the induced systemic resistance (ISR) activated by the beneficial fungus Trichoderma atroviride in maize plants, and the early immunological responses triggered after challenge with the ear rot pathogen Fusarium verticillioides. By transcriptional analysis, we w...

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Autores principales: Agostini, Romina B., Postigo, Agustina, Rius, Sebastián P., Rech, Gabriel E., Campos Bermudez, Valeria A., Vargas, Walter A.
Formato: article artículo publishedVersion
Lenguaje:Inglés
Publicado: American Phytopathological Society 2022
Materias:
Salicylic acid
Fusarium
Gene expression regulation
Signal transduction
Zea mays
Acceso en línea:http://hdl.handle.net/2133/23471
http://hdl.handle.net/2133/23471
Aporte de:
Repositorio Hipermedial de la Universidad Nacional de Rosario (UNR) de Universidad Nacional de Rosario
id I15-R121-2133-23471
record_format dspace
institution Universidad Nacional de Rosario
institution_str I-15
repository_str R-121
collection Repositorio Hipermedial de la Universidad Nacional de Rosario (UNR)
language Inglés
orig_language_str_mv eng
topic Salicylic acid
Fusarium
Gene expression regulation
Signal transduction
Zea mays
spellingShingle Salicylic acid
Fusarium
Gene expression regulation
Signal transduction
Zea mays
Agostini, Romina B.
Postigo, Agustina
Rius, Sebastián P.
Rech, Gabriel E.
Campos Bermudez, Valeria A.
Vargas, Walter A.
Long-lasting primed state in maize plants: Salicylic acid and steroid signaling pathways as key players in the early activation of immune responses in silks
topic_facet Salicylic acid
Fusarium
Gene expression regulation
Signal transduction
Zea mays
description In the present study, we investigated the induced systemic resistance (ISR) activated by the beneficial fungus Trichoderma atroviride in maize plants, and the early immunological responses triggered after challenge with the ear rot pathogen Fusarium verticillioides. By transcriptional analysis, we were able to identify the gene core set specifically modulated in silks of maize plants expressing ISR. Our results showed that the main transcriptional reprogramming falls into genes involved in five main functional categories: cell structure or cell wall, amino acid and protein metabolism, stress responses, signaling, and transport. Among these ISR-related genes, it is important to highlight novel findings regarding hormone metabolism and signaling. The expression of hormone-dependent genes was in good agreement with the abscisic acid, jasmonic acid, and salicylic acid (SA) levels detected in the plants under study. The experimental design allowed the identification of novel regulatory elements related to a heightened state of defense in silks and suggests that steroids and SA are central components of a master regulatory network controlling the immunity of silks during ISR. The results presented also provide evidence about the molecular mechanisms used by maize silks against F. verticillioides to counteract pathogenic development and host invasion, including pathogenesis-related genes, plant cell-wall reinforcement, fungal cell-wall-degrading enzymes and secondary metabolism.
format article
artículo
publishedVersion
author Agostini, Romina B.
Postigo, Agustina
Rius, Sebastián P.
Rech, Gabriel E.
Campos Bermudez, Valeria A.
Vargas, Walter A.
author_facet Agostini, Romina B.
Postigo, Agustina
Rius, Sebastián P.
Rech, Gabriel E.
Campos Bermudez, Valeria A.
Vargas, Walter A.
author_sort Agostini, Romina B.
title Long-lasting primed state in maize plants: Salicylic acid and steroid signaling pathways as key players in the early activation of immune responses in silks
title_short Long-lasting primed state in maize plants: Salicylic acid and steroid signaling pathways as key players in the early activation of immune responses in silks
title_full Long-lasting primed state in maize plants: Salicylic acid and steroid signaling pathways as key players in the early activation of immune responses in silks
title_fullStr Long-lasting primed state in maize plants: Salicylic acid and steroid signaling pathways as key players in the early activation of immune responses in silks
title_full_unstemmed Long-lasting primed state in maize plants: Salicylic acid and steroid signaling pathways as key players in the early activation of immune responses in silks
title_sort long-lasting primed state in maize plants: salicylic acid and steroid signaling pathways as key players in the early activation of immune responses in silks
publisher American Phytopathological Society
publishDate 2022
url http://hdl.handle.net/2133/23471
http://hdl.handle.net/2133/23471
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