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Hunting modulators of plant defence: the grapevine trunk disease fungus Eutypa lata secretes an amplifier for plant basal immunity

Guan, Pingyin; Terigele; Schmidt, Florian; Riemann, Michael; Fischer, Jochen; Thines, Eckhard; Nick, Peter

Abstract:
Grapevine trunk diseases (GTDs) are progressively affecting vineyard longevity and productivity worldwide. To be able to understand and combat these diseases, we need a different concept of the signals exchanged between the grapevine and fungi than the well-studied pathogen-associated molecular pattern and effector concepts. We screened extracts from fungi associated with GTDs for their association with basal defence responses in suspension cells of grapevine. By activity-guided fractionation of the two selected extracts, O-methylmellein was identified as a candidate modulator of grapevine immunity. O-Methylmellein could not induce immune responses by itself (i.e. does not act as an elicitor), but could amplify some of the defence responses triggered by the bacterial elicitor flg22, such as the induction level of defence genes and actin remodelling. These findings show that Eutypa lata, exemplarily selected as an endophytic fungus linked with GTDs, can secrete compounds that act as amplifiers of basal immunity. Thus, in addition to elicitors that can trigger basal immunity, and effectors that down-modulate antibacterial basal immunity, once it had been activated, E. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000124799
Veröffentlicht am 19.10.2020
Originalveröffentlichung
DOI: 10.1093/jxb/eraa152
Scopus
Zitationen: 1
Web of Science
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Botanisches Institut (BOTANIK)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 06.2020
Sprache Englisch
Identifikator ISSN: 0022-0957, 1460-2431
KITopen-ID: 1000124799
Erschienen in The journal of experimental botany
Band 71
Heft 12
Seiten 3710–3724
Vorab online veröffentlicht am 03.03.2020
Schlagwörter Basal immunity, Eutypa lata, fungal culture extracts, grapevine trunk diseases, modulators, O-methylmellein
Nachgewiesen in Scopus
Web of Science
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