Role and mechanisms of callose priming in mycorrhiza-induced resistance

© The Author(s) 2020. Published by Oxford University Press on behalf of the Society for Experimental Biology.

Bibliographische Detailangaben
Veröffentlicht in:Journal of experimental botany. - 1985. - 71(2020), 9 vom: 09. Mai, Seite 2769-2781
1. Verfasser: Sanmartín, Neus (VerfasserIn)
Weitere Verfasser: Pastor, Victoria, Pastor-Fernández, Julia, Flors, Victor, Pozo, Maria Jose, Sánchez-Bel, Paloma
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2020
Zugriff auf das übergeordnete Werk:Journal of experimental botany
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Botrytis cinerea callose mycorrhiza-induced resistance priming starch degradation sugar transport Glucans 9064-51-1
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520 |a 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 
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650 4 |a callose 
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650 4 |a priming 
650 4 |a starch degradation 
650 4 |a sugar transport 
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700 1 |a Pastor, Victoria  |e verfasserin  |4 aut 
700 1 |a Pastor-Fernández, Julia  |e verfasserin  |4 aut 
700 1 |a Flors, Victor  |e verfasserin  |4 aut 
700 1 |a Pozo, Maria Jose  |e verfasserin  |4 aut 
700 1 |a Sánchez-Bel, Paloma  |e verfasserin  |4 aut 
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