Role and mechanisms of callose priming in mycorrhiza-induced resistance
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Otros documentos de la autoría: Sanmartín, Neus; Pastor, Victoria; Pastor Fernández, Julia; Flors, Victor; Pozo, Maria J.; Sánchez-Bel, Paloma
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Título
Role and mechanisms of callose priming in mycorrhiza-induced resistanceAutoría
Fecha de publicación
2020-05-09Editor
Oxford University PressCita bibliográfica
Neus Sanmartín, Victoria Pastor, Julia Pastor-Fernández, Victor Flors, Maria Jose Pozo, Paloma Sánchez-Bel, Role and mechanisms of callose priming in mycorrhiza-induced resistance, Journal of Experimental Botany, Volume 71, Issue 9, 9 May 2020, Pages 2769–2781, https://doi.org/10.1093/jxb/eraa030Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://academic.oup.com/jxb/article/71/9/2769/5716275Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Mycorrhizal plants display enhanced resistance to several pathogens. However, the molecular mechanisms regulating mycorrhiza-induced resistance (MIR) are still elusive. We aim to study the mechanisms underlying MIR ... [+]
Mycorrhizal plants display enhanced resistance to several pathogens. However, the molecular mechanisms regulating mycorrhiza-induced resistance (MIR) are still elusive. We aim to study the mechanisms underlying MIR against Botrytis cinerea and the role of callose accumulation during this process. Mycorrhizal tomato plants inoculated with Rhizoglomus irregularis displayed callose priming upon B. cinerea infection. The callose inhibitor 2-deoxy-d-glucose abolished MIR, confirming the relevance of callose in the bioprotection phenomena. While studying the mechanisms underlying mycorrhiza-induced callose priming, we found that mycorrhizal plants display an enhanced starch degradation rate that is correlated with increased levels of β-amylase1 transcripts following pathogen infection. Starch mobilization in mycorrhizal plants seems coordinated with the increased transcription of sugar transporter and invertase genes. Moreover, the expression levels of genes encoding the vesicular trafficking proteins ATL31 and SYP121 and callose synthase PMR4 were higher in the mycorrhizal plants and further boosted by subsequent pathogen infection. All these proteins play a key role in the priming of callose accumulation in Arabidopsis, suggesting that callose priming is an induced resistance mechanism conserved in different plant species. This evidence highlights the importance of sugar mobilization and vesicular trafficking in the priming of callose as a defence mechanism in mycorrhiza-induced resistance. [-]
Proyecto de investigación
Universitat Jaume I, "Plan de promoción de la Investigación" program (P1-1B2015-33; UJI-B22016-43) ; Spanish Ministry Ministerio de Economia y Empresa-MINECO (AGL2015-64990-C2-2; RTI2018-094350-B-C33) ; Spanish Ministry MINECO (PhD grant BES-2016-077208)Derechos de acceso
info:eu-repo/semantics/openAccess
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