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Plants have evolved a complex immune system to protect themselves against fast evolving pathogens.

 

As a plant biologist, I am fascinated by the molecular basis of plant defense mechanisms and have been studying a major class of plant immune proteins called nucleotide-binding and leucine-rich repeat containing receptors (NLRs). NLRs are ubiquitous in plants and widely used to protect crops against major diseases making them critical contributors to global food security.

 

One of my major achievements was discovering that some NLRs function as pairs, with one member containing an additional “decoy” domain used to recognize pathogen infection by binding to a specific pathogen protein. This integrated decoy model has become a new paradigm in plant disease studies and shown to occur in many plant species. These findings also enabled numerous key plant proteins potentially targeted by pathogens to be identified. They also pave the way towards engineering NLR decoy domains to recognize pathogen of choice.

 

I was recently awarded an ERC starting grant to fund the ii-MAX project, which aims to improve our understanding of fungal virulence through the structure-function analysis of a large family of effectors specific to ascomycete fungi and particularly expanded in the blast fungus Magnaporthe oryzae.

 

Altogether, my research aims to provide new fundamental insights into pathogen virulence, plant immunity and plant susceptibility mechanisms.

Stella Cesari
  • RG

Stella CESARI

Research scientist

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Phone:

(+33) 4 99 62 48 62

 

Email:

stella.cesari@inrae.fr

 

Address:

UMR-PHIM TA A-54/K
Campus International
de Baillarguet
34398 Montpellier Cedex 5
FRANCE

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EXPERIENCE
EXPERIENCE
2018-current
Research scientist

INRA, Plant Health Institute of Montpellier (PHIM), Montpellier, France

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2016-2018
Postdoctoral Fellow

INRA, research unit of BGPI, Montpellier, France

Lab PI: Dr. Thomas Kroj

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2014-2016
Postdoctoral Fellow

CSIRO agriculture, Wheat-rust group, Canberra, Australia

Lab PI: Dr. Peter Dodds

2013-2014
Postdoctoral Fellow
Young Scientist fellowship CJS INRA

INRA, Wheat-rust group, Canberra, Australia

Lab PI: Dr. Peter Dodds

2009-2012
PhD student
Young Scientist fellowship CJS INRA

INRA, research unit of BGPI, Montpellier, France

PhD supervisors: Pr. Jean-Loup Notteghem and Dr. Thomas Kroj

EDUCATION
EDUCATION
2009-2012

PhD Degree

PhD in Plant Pathology

University of Montpellier, France

2017-2009

Master's Degree

MSc in Plant Functional Biology

University of Montpellier, France

2004-2007

Bachelor's Degree

BSc in Plant Functional Biology

University of Montpellier, France

PUBLICATIONS
PUBLICATIONS

Bonnamy M., Pinel-Galzi A., Gorgues L., Chalvon V., Hébrard E., Chéron S., Nguyen H., Poulicard N., Sabot F., Pidon H., Champion A., Cesari S., Kroj T., Albar L.

Rapid evolution of an RNA virus to escape recognition by a rice NLR immune receptor.

In review

 

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Xi Y., Chalvon V., Padilla A., Cesari S.*, Kroj T*.

The activity of the RGA5 sensor NLR from rice requires binding of its integrated HMA domain to effectors but not HMA domain self-interaction. Mol Plant Pathol. 2022 23(9):1320-1330

* Equal contribution

 

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Xi Y., Cesari S., Kroj T.

Insight into the structure and molecular mode of action of plant paired NLR immune receptors.

Essays Biochem. 2022 EBC20210079. doi: 10.1042/EBC20210079.

 

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Lahfa M., Padilla A., de Guillen K., Pissarra J., Raji M., Cesari S., Kroj T., Gladieux P., Roumestand C., Barthe P.

1H, 13C, 15 N backbone and side-chain NMR assignments for three MAX effectors from Magnaporthe oryzae. Biomol NMR Assign. 2022. doi: 10.1007/s12104-022-10095-2.

 

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Cesari S., Xi Y., Declerck N., Chalvon V., Mammri L., Pugnière M., Henriquet C., de Guillen K., Chochois V., Padilla A., Kroj T.

New recognition specificity in a plant immune receptor by molecular engineering of its integrated domain. Nat Commun. 2022 13(1):1524.

 

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Ortiz D., Chen J., Outram M.A., Saur I.M.L., Upadhyaya N.M., Mago R., Ericsson D.J., Cesari S., Chen C., Williams S.J., Dodds P.N.

The stem rust effector protein AvrSr50 escapes Sr50 recognition by a substitution in a single surface-exposed residue. New Phytol. 2022 234(2):592-606.

 

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Xi Y., Chochois V., Kroj T., Cesari S.

A novel robust and high-throughput method to measure cell death in Nicotiana benthamiana leaves by fluorescence imaging. Mol Plant Pathol. 2021 22(12):1688-1696.

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Oikawa K., Fujisaki K., Shimizu M., Takeda T., Saitoh H., Hirabuchi A., Hiraka Y., Białas A., Langner T., Kellner R., Bozkurt T.O., Cesari S., Kroj T., Maidment J.H.R., Banfield M.J., Kamoun S., Terauchi R.
The blast pathogen effector AVR-Pik binds and stabilizes rice heavy metal-associated (HMA) proteins to co-opt their function in immunity
bioRxiv. 2021. doi: https://doi.org/10.1101/2020.12.01.406389

 

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Veillet F, Durand M, Kroj T, Cesari S, Gallois JL.
Precision Breeding Made Real with CRISPR: Illustration through Genetic Resistance to Pathogens.
Plant Commun. 2020, 1(5):100102.

 

 

​Guo L*, Cesari S*, de Guillen K*, Chalvon V, Mammri L, Ma M, Meusnier I, Bonnot F, Padilla A, Peng Y, Liu J, Kroj T.

Specific recognition of two MAX effectors by integrated HMA domains in plant immune receptors involves distinct binding surfaces.

PNAS. 2018, 115(45):11637-11642.

* Equal contribution

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Cesari S.
Multiple strategies for pathogen perception by plant immune receptors. New Phytologist. 2017, doi:10.1111/nph.14877.

Single author Tansley Medal insight

 

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Cesari S, Kroj T.
Transposon-Mediated NLR Exile to the Pollen Allows Rice Blast Resistance without Yield Penalty. Molecular Plant. 2017 10(5):665-667.

 

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Ortiz D, de Guillen K, Cesari S, Chalvon V, Gracy J, Padilla A, Kroj T.
Recognition of the Magnaporthe oryzae effector AVR-Pia by the decoy domain of the rice NLR immune receptor RGA5. Plant Cell. 2017 TPC2016-00435-RAR1.

 

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Casey LW, Lavrencic P, Bentham AR, Cesari S, Ericsson DJ, Croll T, Turk D, Anderson PA, Mark AE, Dodds PN, Mobli M, Kobe B, Williams SJ.
The CC domain structure from the wheat stem rust resistance protein Sr33 challenges paradigms for dimerization in plant NLR proteins. PNAS. 2016 113(45): 12856-12861.

 

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Cesari S, Moore J, Chen C, Webb D, Periyannan S, Mago R, Bernoux M, Lagudah ES, Dodds PN.
Cytosolic activation of cell death and stem rust resistance by cereal MLA-family CC-NLR proteins. PNAS. 2016 113(36):10204-10209.

Highlighted in: El Kasmi F and Nishimura M. PNAS 2016 113(45): 12619-21

 

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Hutin M*, Césari S*, Chalvon V, Michel C, Tran TT, Boch J, Koebnik R, Szurek B, Kroj T.
Ectopic activation of the rice NLR heteropair RGA4/RGA5 confers resistance to bacterial blight and bacterial leaf streak diseases. Plant Journal. 2016 88(1):43-55.

* Equal contribution

 

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Césari S, Bernoux M, Moncuquet P, Kroj T, Dodds P.
A novel conserved mechanism for plant NLR protein pairs: the ‘integrated decoy’ hypothesis. Frontiers in Plant Science. 2014 doi: 10.3389/fpls.2014.00606.

Highlighted in: Wu C-H et al. FIPS 2015 6:134. doi: 10.3389/fpls.2015.00134

 

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Césari S*, Kanzaki H*, Fujiwara T*, Bernoux M, Chalvon V, Kawano Y, Shimamoto K, Dodds P, Terauchi R, Kroj T.
The NB-LRR proteins RGA4 and RGA5 interact functionally and physically to confer disease resistance. EMBO journal. 2014 33(17):1941-1959.

* Equal contribution

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Svistoonoff S, Benabdoun FM, Nambiar-Veetil M, Imanishi L, Vaissayre V, Césari S, Diagne N, Hocher V, de Billy F, Bonneau J, Wall L, Ykhlef N, Rosenberg C, Bogusz D, Franche C, Gherbi H.

The independent acquisition of plant root nitrogen-fixing symbiosis in Fabids recruited the same genetic pathway for nodule organogenesis. PLoS One. 2013 8(5):e64515.

 

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Césari S, Thilliez G, Ribot C, Chalvon V, Michel C, Jauneau A, Rivas S, Alaux L, Kanzaki H, Okuyama Y, Morel JB, Fournier E, Tharreau D, Terauchi R, Kroj T.

The rice resistance protein pair RGA4/RGA5 recognizes the Magnaporthe oryzae effectors AVR-Pia and AVR1-CO39 by direct binding. Plant Cell. 2013 25(4):1463-1481.

Highlighted in an “in brief” article: Mach J. Plant Cell 2013 25(4): 1189

 

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Ribot C, Césari S, Abidi I, Chalvon V, Bournaud C, Vallet J, Lebrun MH, Morel JB, Kroj T.

The Magnaporthe oryzae effector AVR1-CO39 is translocated into rice cells independently of a fungal-derived machinery. Plant Journal. 2013 74(1):1-12.

Featured article and cover of the Plant Journal 2013 74(1)

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EXPERTISE AND SKILLS
SKILLS

FUNCTIONAL GENETICS IN CEREALS

PROTEIN STRUCTURE-FUNCTION ANALYSES

MOLECULAR BIOLOGY

PHYTOPATHOLOGY AND MICROBIOLOGY

PROJECTS
PROJECTS

Research projects:

 

  • Structure-function analysis of fungal effectors and their host targets

  • Recognition of pathogen effectors by plant intracellular immune receptors

  • Functional mechanisms of paired immune receptors in rice

  • Signalling induced by cereal intracellular immune receptors

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Systems studied:

 

  • Magnaporthe oryzae - rice

  • Puccinia graminis f. sp. tritici - wheat

CONTACT
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