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The DELLA protein SLR1 integrates and amplifies salicylic acid- and jasmonic acid-dependent innate immunity in rice

David De Vleesschauwer (UGent) , Hamed Seifi (UGent) , Osvaldo Filipe (UGent) , Ashley Haeck (UGent) , Son Nguyen (UGent) , Kristof Demeestere (UGent) and Monica Höfte (UGent)
(2016) PLANT PHYSIOLOGY. 170(3). p.1831-1847
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Abstract
Gibberellins are a class of tetracyclic plant hormones that are well known to promote plant growth by inducing the degradation of a class of nuclear growth-repressing proteins, called DELLAs. In recent years, GA and DELLAs are also increasingly implicated in plant responses to pathogen attack, although our understanding of the underlying mechanisms is still limited, especially in monocotyledonous crop plants. Aiming to further decipher the molecular underpinnings of GA- and DELLA-modulated plant immunity, we studied the dynamics and impact of GA and DELLA during infection of the model crop rice (Oryza sativa) with four different pathogens exhibiting distinct lifestyles and infection strategies. Opposite to previous findings in Arabidopsis (Arabidopsis thaliana), our findings reveal a prominent role of the DELLA protein Slender Rice1 (SLR1) in the resistance toward (hemi) biotrophic but not necrotrophic rice pathogens. Moreover, contrary to the differential effect of DELLA on the archetypal defense hormones salicylic acid (SA) and jasmonic acid (JA) in Arabidopsis, we demonstrate that the resistance-promoting effect of SLR1 is due at least in part to its ability to boost both SA-and JA-mediated rice defenses. In a reciprocal manner, we found JA and SA treatment to interfere with GA metabolism and stabilize SLR1. Together, these findings favor a model whereby SLR1 acts as a positive regulator of hemibiotroph resistance in rice by integrating and amplifying SA- and JA-dependent defense signaling. Our results highlight the differences in hormone defense networking between rice and Arabidopsis and underscore the importance of GA and DELLA in molding disease outcomes.
Keywords
DISEASE RESISTANCE, DEFENSE-RELATED GENES, ARABIDOPSIS-THALIANA, COCHLIOBOLUS-MIYABEANUS, GIBBERELLIN RESPONSE, FUNCTIONAL-ANALYSIS, SIGNALING PATHWAY, BACTERIAL-BLIGHT, PLANT IMMUNITY, GROWTH

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MLA
De Vleesschauwer, David et al. “The DELLA Protein SLR1 Integrates and Amplifies Salicylic Acid- and Jasmonic Acid-dependent Innate Immunity in Rice.” PLANT PHYSIOLOGY 170.3 (2016): 1831–1847. Print.
APA
De Vleesschauwer, D., Seifi, H., Filipe, O., Haeck, A., Nguyen, S., Demeestere, K., & Höfte, M. (2016). The DELLA protein SLR1 integrates and amplifies salicylic acid- and jasmonic acid-dependent innate immunity in rice. PLANT PHYSIOLOGY, 170(3), 1831–1847.
Chicago author-date
De Vleesschauwer, David, Hamed Seifi, Osvaldo Filipe, Ashley Haeck, Son Nguyen, Kristof Demeestere, and Monica Höfte. 2016. “The DELLA Protein SLR1 Integrates and Amplifies Salicylic Acid- and Jasmonic Acid-dependent Innate Immunity in Rice.” Plant Physiology 170 (3): 1831–1847.
Chicago author-date (all authors)
De Vleesschauwer, David, Hamed Seifi, Osvaldo Filipe, Ashley Haeck, Son Nguyen, Kristof Demeestere, and Monica Höfte. 2016. “The DELLA Protein SLR1 Integrates and Amplifies Salicylic Acid- and Jasmonic Acid-dependent Innate Immunity in Rice.” Plant Physiology 170 (3): 1831–1847.
Vancouver
1.
De Vleesschauwer D, Seifi H, Filipe O, Haeck A, Nguyen S, Demeestere K, et al. The DELLA protein SLR1 integrates and amplifies salicylic acid- and jasmonic acid-dependent innate immunity in rice. PLANT PHYSIOLOGY. 2016;170(3):1831–47.
IEEE
[1]
D. De Vleesschauwer et al., “The DELLA protein SLR1 integrates and amplifies salicylic acid- and jasmonic acid-dependent innate immunity in rice,” PLANT PHYSIOLOGY, vol. 170, no. 3, pp. 1831–1847, 2016.
@article{7239518,
  abstract     = {Gibberellins are a class of tetracyclic plant hormones that are well known to promote plant growth by inducing the degradation of a class of nuclear growth-repressing proteins, called DELLAs. In recent years, GA and DELLAs are also increasingly implicated in plant responses to pathogen attack, although our understanding of the underlying mechanisms is still limited, especially in monocotyledonous crop plants. Aiming to further decipher the molecular underpinnings of GA- and DELLA-modulated plant immunity, we studied the dynamics and impact of GA and DELLA during infection of the model crop rice (Oryza sativa) with four different pathogens exhibiting distinct lifestyles and infection strategies. Opposite to previous findings in Arabidopsis (Arabidopsis thaliana), our findings reveal a prominent role of the DELLA protein Slender Rice1 (SLR1) in the resistance toward (hemi) biotrophic but not necrotrophic rice pathogens. Moreover, contrary to the differential effect of DELLA on the archetypal defense hormones salicylic acid (SA) and jasmonic acid (JA) in Arabidopsis, we demonstrate that the resistance-promoting effect of SLR1 is due at least in part to its ability to boost both SA-and JA-mediated rice defenses. In a reciprocal manner, we found JA and SA treatment to interfere with GA metabolism and stabilize SLR1. Together, these findings favor a model whereby SLR1 acts as a positive regulator of hemibiotroph resistance in rice by integrating and amplifying SA- and JA-dependent defense signaling. Our results highlight the differences in hormone defense networking between rice and Arabidopsis and underscore the importance of GA and DELLA in molding disease outcomes.},
  author       = {De Vleesschauwer, David and Seifi, Hamed and Filipe, Osvaldo and Haeck, Ashley and Nguyen, Son and Demeestere, Kristof and Höfte, Monica},
  issn         = {0032-0889},
  journal      = {PLANT PHYSIOLOGY},
  keywords     = {DISEASE RESISTANCE,DEFENSE-RELATED GENES,ARABIDOPSIS-THALIANA,COCHLIOBOLUS-MIYABEANUS,GIBBERELLIN RESPONSE,FUNCTIONAL-ANALYSIS,SIGNALING PATHWAY,BACTERIAL-BLIGHT,PLANT IMMUNITY,GROWTH},
  language     = {eng},
  number       = {3},
  pages        = {1831--1847},
  title        = {The DELLA protein SLR1 integrates and amplifies salicylic acid- and jasmonic acid-dependent innate immunity in rice},
  url          = {http://dx.doi.org/10.1104/pp.15.01515},
  volume       = {170},
  year         = {2016},
}

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