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Article ; Online: The Complete Genome Resource of Xanthomonas oryzae pv. oryzae CIX2779 Includes the First Sequence of a Plasmid for an African Representative of This Rice Pathogen

Sciallano, Coline / Auguy, Florence / Boulard, Gabriel / Szurek, Boris / Cunnac, Sébastien

Molecular Plant-Microbe Interactions. 2023 Jan., v. 36, no. 1 p.73-77

2023

Abstract: The bacterial plant pathogen Xanthomonas oryzae pv. oryzae is responsible for the foliar rice bacterial blight disease. Genetically contrasted, continent-specific, sublineages of this species can cause important damages to rice production both in Asia ... ...

Abstract	The bacterial plant pathogen Xanthomonas oryzae pv. oryzae is responsible for the foliar rice bacterial blight disease. Genetically contrasted, continent-specific, sublineages of this species can cause important damages to rice production both in Asia and Africa. We report on the genome of the CIX2779 strain of this pathogen, previously named NAI1 and originating from Niger. Oxford Nanopore long reads assembly and Illumina short reads polishing produced a genome sequence composed of a 4,725,792-bp circular chromosome and a 39,798-bp-long circular plasmid designated pCIX2779_1. The chromosome structure and base-level sequence are highly related to reference strains of African X. oryzae pv. oryzae and encode identical transcription activator-like effectors for virulence. Importantly, our in silico analysis strongly indicates that pCIX2779_1 is a genuine conjugative plasmid, the first indigenous one sequenced from an African strain of the X. oryzae species. Copyright © 2022 The Author(s). This is an open access article distributed under the CC BY 4.0 International license.
Keywords	Xanthomonas oryzae pv. oryzae ; blight ; chromosomes ; computer simulation ; genome ; nanopores ; nucleotide sequences ; plant pathogenic bacteria ; plasmids ; rice ; virulence ; Asia ; Niger ; Oxford Nanopore Technologies ; plant disease ; TAL effector
Language	English
Dates of publication	2023-01
Size	p. 73-77.
Publishing place	The American Phytopathological Society
Document type	Article ; Online
ZDB-ID	743331-1
ISSN	1943-7706 ; 0894-0282
ISSN (online)	1943-7706
ISSN	0894-0282
DOI	10.1094/MPMI-09-22-0191-A
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Article: First report of Cassava Bacterial Blight caused by

Zárate-Chaves, Carlos A / Moufid, Yassine / López, Camilo E / Bernal, Adriana J / Szurek, Boris / Yánez, Jeniffer Marcela

Plant disease

2024

Abstract: Xanthomonas ... ...

Abstract	Xanthomonas phaseoli
Language	English
Publishing date	2024-02-29
Publishing country	United States
Document type	Journal Article
ZDB-ID	754182-x
ISSN	0191-2917
ISSN	0191-2917
DOI	10.1094/PDIS-10-23-2111-PDN
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Article: The Complete Genome Resource of

Sciallano, Coline / Auguy, Florence / Boulard, Gabriel / Szurek, Boris / Cunnac, Sébastien

Molecular plant-microbe interactions : MPMI

2022 Volume 36, Issue 1, Page(s) 73–77

Abstract: The bacterial plant ... ...

Abstract	The bacterial plant pathogen
MeSH term(s)	Oryza/microbiology ; Plasmids ; Transcription Activator-Like Effectors/genetics ; Xanthomonas/genetics ; Plant Diseases/microbiology ; Bacterial Proteins/genetics
Chemical Substances	Transcription Activator-Like Effectors ; Bacterial Proteins
Language	English
Publishing date	2022-12-20
Publishing country	United States
Document type	Journal Article
ZDB-ID	743331-1
ISSN	1943-7706 ; 0894-0282
ISSN (online)	1943-7706
ISSN	0894-0282
DOI	10.1094/MPMI-09-22-0191-A
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: TAL Effectors with Avirulence Activity in African Strains of Xanthomonas oryzae pv. oryzae

Lachaux, Marlène / Thomas, Emilie / Bogdanove, Adam J. / Szurek, Boris / Hutin, Mathilde

Rice. 2022 Dec., v. 15, no. 1 p.9-9

2022

Abstract: BACKGROUND: Xanthomonas oryzae pv. oryzae (Xoo) causes bacterial leaf blight, a devastating disease of rice. Among the type-3 effectors secreted by Xoo to support pathogen virulence, the Transcription Activator-Like Effector (TALE) family plays a ... ...

Abstract	BACKGROUND: Xanthomonas oryzae pv. oryzae (Xoo) causes bacterial leaf blight, a devastating disease of rice. Among the type-3 effectors secreted by Xoo to support pathogen virulence, the Transcription Activator-Like Effector (TALE) family plays a critical role. Some TALEs are major virulence factors that activate susceptibility (S) genes, overexpression of which contributes to disease development. Host incompatibility can result from TALE-induced expression of so-called executor (E) genes leading to a strong and rapid resistance response that blocks disease development. In that context, the TALE functions as an avirulence (Avr) factor. To date no such avirulence factors have been identified in African strains of Xoo. RESULTS: With respect to the importance of TALEs in the Rice-Xoo pathosystem, we aimed at identifying those that may act as Avr factor within African Xoo. We screened 86 rice accessions, and identified 12 that were resistant to two African strains while being susceptible to a well-studied Asian strain. In a gain of function approach based on the introduction of each of the nine tal genes of the avirulent African strain MAI1 into the virulent Asian strain PXO99ᴬ, four were found to trigger resistance on specific rice accessions. Loss-of-function mutational analysis further demonstrated the avr activity of two of them, talD and talI, on the rice varieties IR64 and CT13432 respectively. Further analysis of TalI demonstrated the requirement of its activation domain for triggering resistance in CT13432. Resistance in 9 of the 12 rice accessions that were resistant against African Xoo specifically, including CT13432, could be suppressed or largely suppressed by trans-expression of the truncTALE tal2h, similarly to resistance conferred by the Xa1 gene which recognizes TALEs generally independently of their activation domain. CONCLUSION: We identified and characterized TalD and TalI as two African Xoo TALEs with avirulence activity on IR64 and CT13432 respectively. Resistance of CT13432 against African Xoo results from the combination of two mechanisms, one relying on the TalI-mediated induction of an unknown executor gene and the other on an Xa1-like gene or allele.
Keywords	Xanthomonas oryzae pv. oryzae ; alleles ; gain-of-function mutation ; leaf blight ; loss-of-function mutation ; mutational analysis ; pathogens ; rice ; virulence
Language	English
Dates of publication	2022-12
Size	p. 9.
Publishing place	Springer US
Document type	Article ; Online
ZDB-ID	2457103-9
ISSN	1939-8433 ; 1939-8425
ISSN (online)	1939-8433
ISSN	1939-8425
DOI	10.1186/s12284-022-00553-9
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Stop helping pathogens: engineering plant susceptibility genes for durable resistance.

Garcia-Ruiz, Hernan / Szurek, Boris / Van den Ackerveken, Guido

Current opinion in biotechnology

2021 Volume 70, Page(s) 187–195

Abstract: Alternatives to protect crops against diseases are desperately needed to secure world food production and make agriculture more sustainable. Genetic resistance to pathogens utilized so far is mostly based on single dominant resistance genes that mediate ... ...

Abstract	Alternatives to protect crops against diseases are desperately needed to secure world food production and make agriculture more sustainable. Genetic resistance to pathogens utilized so far is mostly based on single dominant resistance genes that mediate specific recognition of invaders and that is often rapidly broken by pathogen variants. Perturbation of plant susceptibility (S) genes offers an alternative providing plants with recessive resistance that is proposed to be more durable. S genes enable the establishment of plant disease, and their inactivation provides opportunities for resistance breeding of crops. However, loss of S gene function can have pleiotropic effects. Developments in genome editing technology promise to provide powerful methods to precisely interfere with crop S gene functions and reduce tradeoffs.
MeSH term(s)	Crops, Agricultural/genetics ; Disease Resistance/genetics ; Gene Editing ; Genetic Engineering ; Plant Breeding ; Plant Diseases/genetics ; Plants, Genetically Modified/genetics
Language	English
Publishing date	2021-06-19
Publishing country	England
Document type	Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Review
ZDB-ID	1052045-4
ISSN	1879-0429 ; 0958-1669
ISSN (online)	1879-0429
ISSN	0958-1669
DOI	10.1016/j.copbio.2021.05.005
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Article: TAL Effectors with Avirulence Activity in African Strains of Xanthomonas oryzae pv. oryzae.

Lachaux, Marlène / Thomas, Emilie / Bogdanove, Adam J / Szurek, Boris / Hutin, Mathilde

Rice (New York, N.Y.)

2022 Volume 15, Issue 1, Page(s) 9

Abstract: Background: Xanthomonas oryzae pv. oryzae (Xoo) causes bacterial leaf blight, a devastating disease of rice. Among the type-3 effectors secreted by Xoo to support pathogen virulence, the Transcription Activator-Like Effector (TALE) family plays a ... ...

Abstract	Background: Xanthomonas oryzae pv. oryzae (Xoo) causes bacterial leaf blight, a devastating disease of rice. Among the type-3 effectors secreted by Xoo to support pathogen virulence, the Transcription Activator-Like Effector (TALE) family plays a critical role. Some TALEs are major virulence factors that activate susceptibility (S) genes, overexpression of which contributes to disease development. Host incompatibility can result from TALE-induced expression of so-called executor (E) genes leading to a strong and rapid resistance response that blocks disease development. In that context, the TALE functions as an avirulence (Avr) factor. To date no such avirulence factors have been identified in African strains of Xoo. Results: With respect to the importance of TALEs in the Rice-Xoo pathosystem, we aimed at identifying those that may act as Avr factor within African Xoo. We screened 86 rice accessions, and identified 12 that were resistant to two African strains while being susceptible to a well-studied Asian strain. In a gain of function approach based on the introduction of each of the nine tal genes of the avirulent African strain MAI1 into the virulent Asian strain PXO99 Conclusion: We identified and characterized TalD and TalI as two African Xoo TALEs with avirulence activity on IR64 and CT13432 respectively. Resistance of CT13432 against African Xoo results from the combination of two mechanisms, one relying on the TalI-mediated induction of an unknown executor gene and the other on an Xa1-like gene or allele.
Language	English
Publishing date	2022-02-04
Publishing country	United States
Document type	Journal Article
ZDB-ID	2457103-9
ISSN	1939-8433 ; 1939-8425
ISSN (online)	1939-8433
ISSN	1939-8425
DOI	10.1186/s12284-022-00553-9
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: A Decade Decoded: Spies and Hackers in the History of TAL Effectors Research.

Perez-Quintero, Alvaro L / Szurek, Boris

Annual review of phytopathology

2019 Volume 57, Page(s) 459–481

Abstract: Transcription activator-like effectors (TALEs) from the ... ...

Abstract	Transcription activator-like effectors (TALEs) from the genus
MeSH term(s)	Bacterial Proteins ; Plant Diseases ; Transcription Activator-Like Effectors ; Transcription Factors ; Xanthomonas
Chemical Substances	Bacterial Proteins ; Transcription Activator-Like Effectors ; Transcription Factors
Language	English
Publishing date	2019-08-06
Publishing country	United States
Document type	Journal Article ; Review
ZDB-ID	207934-3
ISSN	1545-2107 ; 0066-4286
ISSN (online)	1545-2107
ISSN	0066-4286
DOI	10.1146/annurev-phyto-082718-100026
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Article: Confirmation Report of Bacterial Leaf Streak Disease of Rice Caused by Xanthomonas oryzae pv. oryzicola in Senegal

Tall, Hamidou / Lachaux, Marlène / Diallo, Amadou / Wonni, Issa / Tékété, Cheick / Verdier, Valérie / Szurek, Boris / Hutin, Mathilde

Plant disease. 2022 Aug. 01, v. 106, no. 8

2022

Abstract: Xanthomonas oryzae pv. oryzicola (Xoc), the causal agent of bacterial leaf streak (BLS), is considered one of the most important emerging pathogens of rice in Africa. This disease is estimated to be responsible for 20 to 30% yield loss (Sileshi and ... ...

Abstract	Xanthomonas oryzae pv. oryzicola (Xoc), the causal agent of bacterial leaf streak (BLS), is considered one of the most important emerging pathogens of rice in Africa. This disease is estimated to be responsible for 20 to 30% yield loss (Sileshi and Gebeyehu 2021) and has been characterized in several west African countries, including Mali and Burkina Faso since 2003 and more recently in the Ivory Coast (Diallo et al. 2021; Wonni et al. 2014). The presence of BLS symptoms in Senegal was reported by Trinh (1980) but, to our knowledge, BLS occurrence has never been validated further and no strain of Xoc has ever been isolated from Senegalese rice fields. Xoc is transmitted by seeds, which contributes to its spread through the rice trade (Sileshi and Gebeyehu 2021). To confirm Trinh’s observations, we surveyed rice fields between 2014 and 2016 in eight different regions where rice is produced in Senegal. Typical disease symptoms characterized by yellow-brown to black translucent leaf streaks, sometimes along with exudates, were detected in fields of several regions and collected. Leaf pieces were successively sanitized in 1% sodium hypochlorite and 70% ethanol, rinsed in sterile water, and symptomatic fragments were ground using the Qiagen Tissue Lyser System (QIAGEN, Courtaboeuf, France). The leaf powder was diluted in 1.5 ml of sterile water and incubated for 30 min at room temperature. Ten microliters of the suspension was streaked on semiselective PSA medium (peptone 10 g, sucrose 10 g, glutamic acid 1 g, and agar 16 g per liter) and incubated at 28°C for 3 to 7 days. Characteristic round, convex, mucous, straw-yellow Xoc candidate colonies were purified from six individual leaf samples from two distinct sites in Ndiaye and one in Fanaye in the region of Saint Louis. To confirm their identity, isolated strains were tested for pathogenicity and molecular characterization. All isolates were subjected to the multiplex PCR developed for the identification of X. oryzae pathovars (Lang et al. 2010) and revealed the same PCR profile (two amplicons of 324 and 691 base pairs) similar to that of the Xoc reference strain BLS256. Leaves of 5-week-old plants of Oryza sativa cv. Kitaake were infiltrated with a needleless syringe containing a bacterial suspension adjusted to 10⁸ CFU/ml. After 7 days of incubation under greenhouse conditions (27 ± 1°C with a 12-h photoperiod), all infiltrated spots (two spots on three plants per isolate) developed water-soaked lesions similar to those caused by control strain BLS256, except when leaves were infiltrated with water. Symptomatic leaf tissues were ground and plated on PSA medium, producing colonies with typical Xanthomonas morphology that were diagnosed as Xoc by multiplex PCR typing, thus fulfilling Koch’s postulates. Finally, four of the isolates were subjected to gyrB sequencing upon PCR amplification using the universal primers XgyrB1F and XgyrB1R (Young et al. 2008). Analysis of 780 bp partial gyrB sequences of strains S18-3-4, S23-1-12, S52-1-4, and S52-1-10 highlighted 100% identity with the gyrB sequence of strain BLS256 (acc. no. CP003057). To our knowledge, this is the first report of BLS in Senegal that is supported by molecular characterization methods. This study validates the presence of BLS in Senegal and will serve as a basis for future rice breeding efforts for locally adapted resistance. More studies are needed to clarify the spatial distribution and prevalence of BLS in Senegal as rice cultivation is expanding rapidly in the country.
Keywords	Oryza sativa ; Xanthomonas oryzae pv. oryzicola ; agar ; ambient temperature ; bacterial leaf streak ; ethanol ; glutamic acid ; greenhouses ; leaves ; pathogenicity ; pathovars ; peptones ; polymerase chain reaction ; rice ; sodium hypochlorite ; sucrose ; syringes ; trade ; Burkina Faso ; Cote d'Ivoire ; Mali ; Senegal
Language	English
Dates of publication	2022-0801
Publishing place	The American Phytopathological Society
Document type	Article
ZDB-ID	754182-x
ISSN	0191-2917
ISSN	0191-2917
DOI	10.1094/PDIS-11-21-2481-PDN
Database	NAL-Catalogue (AGRICOLA)

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Article: Stop helping pathogens: engineering plant susceptibility genes for durable resistance

Garcia-Ruiz, Hernan / Szurek, Boris / Van den Ackerveken, Guido

Current opinion in biotechnology. 2021 Aug., v. 70

2021

Abstract	Alternatives to protect crops against diseases are desperately needed to secure world food production and make agriculture more sustainable. Genetic resistance to pathogens utilized so far is mostly based on single dominant resistance genes that mediate specific recognition of invaders and that is often rapidly broken by pathogen variants. Perturbation of plant susceptibility (S) genes offers an alternative providing plants with recessive resistance that is proposed to be more durable. S genes enable the establishment of plant disease, and their inactivation provides opportunities for resistance breeding of crops. However, loss of S gene function can have pleiotropic effects. Developments in genome editing technology promise to provide powerful methods to precisely interfere with crop S gene functions and reduce tradeoffs.
Keywords	biotechnology ; food production ; genetic resistance ; pathogens
Language	English
Dates of publication	2021-08
Size	p. 187-195.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	1052045-4
ISSN	1879-0429 ; 0958-1669
ISSN (online)	1879-0429
ISSN	0958-1669
DOI	10.1016/j.copbio.2021.05.005
Database	NAL-Catalogue (AGRICOLA)

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Article: Confirmation report of Bacterial Leaf Streak disease of rice caused by

Tall, Hamidou / Lachaux, Marlene / Diallo, Amadou / Wonni, Issa / Tekete, Cheick / Verdier, Valérie / Szurek, Boris / Hutin, Mathilde

Plant disease

2022

Abstract: Xanthomonas ... ...

Abstract	Xanthomonas oryzae
Language	English
Publishing date	2022-01-31
Publishing country	United States
Document type	Journal Article
ZDB-ID	754182-x
ISSN	0191-2917
ISSN	0191-2917
DOI	10.1094/PDIS-11-21-2481-PDN
Database	MEDical Literature Analysis and Retrieval System OnLINE

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