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Salicylic acid perturbs sRNA-Gibberellin regulatory network in immune response of potato to potato virus Y infection

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Title Salicylic acid perturbs sRNA-Gibberellin regulatory network in immune response of potato to potato virus Y infection
 
Creator Kriznik, M.
Petek, M.
Dobnik, D.
Ramsak, Z.
Baebler, S.
Pollmann, S.
Kreuze, J.F.
Zel, J.
Gruden, K
 
Subject potatoes
gibberellins
potato virus y
salicylic acids
symbiosis
 
Description Potato virus Y is the most economically important potato viral pathogen. We aimed at unraveling the roles of small RNAs (sRNAs) in the complex immune signaling network controlling the establishment of tolerant response of potato cv. Désirée to the virus. We constructed a sRNA regulatory network connecting sRNAs and their targets to link sRNA level responses to physiological processes. We discovered an interesting novel sRNAs-gibberellin regulatory circuit being activated as early as 3 days post inoculation (dpi) before viral multiplication can be detected. Two endogenous sRNAs, miR167 and phasiRNA931 were predicted to regulate gibberellin biosynthesis genes GA20-oxidase and GA3-oxidase. The increased expression of phasiRNA931 was also reflected in decreased levels of GA3-oxidase transcripts. Moreover, decreased concentration of gibberellin confirmed this regulation. The functional relation between lower activity of gibberellin signaling and reduced disease severity was previously confirmed in Arabidopsis-virus interaction using knockout mutants. We further showed that this regulation is salicylic acid-dependent as the response of sRNA network was attenuated in salicylic acid-depleted transgenic counterpart NahG-Désirée expressing severe disease symptoms. Besides downregulation of gibberellin signaling, regulation of immune receptor transcripts by miR6022 as well as upregulation of miR164, miR167, miR169, miR171, miR319, miR390, and miR393 in tolerant Désirée, revealed striking similarities to responses observed in mutualistic symbiotic interactions. The intertwining of different regulatory networks revealed, shows how developmental signaling, disease symptom development, and stress signaling can be balanced.
 
Date 2017-12
2018-10-17T20:14:24Z
2018-10-17T20:14:24Z
 
Type Journal Article
 
Identifier Kriznik, M.; Petek, M.; Dobnik, D.; Ramsak, Z.; Baebler, S.; Pollmann, S.; Kreuze, J.F.; Zel, J.; Gruden, K. 2018. Salicylic acid perturbs sRNA-Gibberellin regulatory network in immune response of potato to potato virus Y infection. Frontiers in Plant Science. ISSN 1664-462X. Online First 22 Dec 2017. 14 p.
1664-462X
https://hdl.handle.net/10568/97668
https://doi.org/10.3389/fpls.2017.02192
 
Language en
 
Rights CC-BY-4.0
Open Access
 
Format 14 p.
 
Source Frontiers in Plant Science