New sources of partial resistance to bacterial spot race T2 in processing tomatoes

Berrueta, María Cecilia; Giménez, Gustavo; Galván, Guillermo A.; Borges, Alejandra

doi:10.1590/s0102-05362016003004

Cited by 7 publications

(3 citation statements)

References 17 publications

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“…The increase in accuracy and precision of visual estimates, particularly those performed by inexperienced raters, has already been reported for different SADs developed for the evaluation of bacterial spot in several crops (Braido et al, 2015;Duan, Zhao, Wang, & Yang, 2015;Nuñez et al, 2017). These diagrams have been used directly in breeding programs, aiding in disease resistance and genotype selection evaluations (Berrueta, Gimenez, Galvan, & Borges, 2016;Varago, Citadin, Sachet, Penso, & Raseira, 2017). It has also indirectly helped out these researches, subsidizing studies on the efficiency of control methods for diseases caused by Xanthomonas (Itako, Tolentino Jr., Silva Jr., Soman, & Maringoni, 2015;Rodrigues, Bueno, & Tebaldi, 2016).…”

Section: Introductionmentioning

confidence: 99%

Standard Area Diagram Set for Bacterial Spot Quantification in Entire-Margined Leaves of Sour Passion Fruit

Costa¹,

Peixoto²,

Blum³

et al. 2019

JAS

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This study developed and validated a standard area diagram set (SADs) to aid in the estimation of bacterial spot (Xanthomonas axonopodis pv. passiflorae) severity in entire-margined leaves of sour passion fruit (Passiflora edulis Sims). The SADs consisted of eight severity levels (3; 6; 12; 25; 50; 77, and 88%). For its validation, 20 raters, who initially estimated the disease severity without the aid of the SADs, were divided into groups (G1 and G3, inexperienced; G2 and G4, experienced). Subsequently, G1 and G2 performed the second evaluation without the SADs, and G3 and G4 completed the second evaluation using the proposed SADs. The accuracy and precision of the assessments were determined by simple linear regression and by the Lin’s concordance correlation coefficient. The increase in accuracy was confirmed by the 80% constant error-free estimates (G3 and G4) and 100% (G3) and 80% (G4) systematic error-free estimates when the SADs was used. Precision increased with the increase in the coefficient of determination, the reduction in absolute errors, and the increase in the reproducibility of the estimates between pairs of raters. Inexperienced raters benefited the most from the use of the SADs. The increase in the accuracy and precision in the non-aided groups, when present, was less pronounced than those increments observed in the SADs-aided groups. The Lin’s concordance correlation coefficient confirmed the increased accuracy and precision detected by the linear regression analysis and indicated increased agreement between the estimated and actual values of disease severity in the SADs-aided groups.

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Section: Introductionmentioning

confidence: 99%

Standard Area Diagram Set for Bacterial Spot Quantification in Entire-Margined Leaves of Sour Passion Fruit

Costa¹,

Peixoto²,

Blum³

et al. 2019

JAS

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“…X. vesicatoria and X. euvesicatoria were historically considered the predominant bacterial spot lineages worldwide, although X. perforans and X. gardneri are increasingly isolated from areas in America, Africa, the Middle East, and the Indian Ocean ( Vancheva et al, 2021 ). However, the disease caused by X. vesicatoria continues to be a worldwide problem due to the seedborne nature of this pathogen ( Kebede et al, 2014 ; Potnis et al, 2015 ; Berrueta et al, 2016 ; Roach et al, 2018 ; Osdaghi et al, 2021 ; Potnis, 2021 ; Ahmad and Ahmad, 2022 ).…”

Section: Discussionmentioning

confidence: 99%

Genomic and phenotypic insight into Xanthomonas vesicatoria strains with different aggressiveness on tomato

Bianco,

Ponso,

Garita-Cambronero

et al. 2023

Front. Microbiol.

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Xanthomonas vesicatoria is one of the causal agents of bacterial spot, a disease that seriously affects the production of tomato (Solanum lycopersicum) and pepper (Capsicum annum) worldwide. In Argentina, bacterial spot is found in all tomato producing areas, with X. vesicatoria being one of the main species detected in the fields. Previously, we isolated three X. vesicatoria strains BNM 208, BNM 214, and BNM 216 from tomato plants with bacterial spot, and found they differed in their ability to form biofilm and in their degree of aggressiveness. Here, the likely causes of those differences were explored through genotypic and phenotypic studies. The genomes of the three strains were sequenced and assembled, and then compared with each other and also with 12 other publicly available X. vesicatoria genomes. Phenotypic characteristics (mainly linked to biofilm formation and virulence) were studied in vitro. Our results show that the differences observed earlier between BNM 208, BNM 214, and BNM 216 may be related to the structural characteristics of the xanthan gum produced by each strain, their repertoire of type III effectors (T3Es), the presence of certain genes associated with c-di-GMP metabolism and type IV pili (T4P). These findings on the pathogenicity mechanisms of X. vesicatoria could be useful for developing bacterial spot control strategies aimed at interfering with the infection processes.

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“…In Uruguay, where tomatoes are affected by the race Т2 X. vesicatoria, were identified varieties Hawaii 7981, Loica and Ohio 8245, which can be used as new natural sources of resistance to the pathogen X. vesicatoria of the T2 race (Berrueta et al, 2016). Now in the world market there are no varieties of tomatoes that would be resistant against C. michiganensis subsp.…”

Section: Antibiotics As Means Of Protection Of Vegetable Crops Against Bacterial Diseases Pathogensmentioning

confidence: 99%

Biotechnological Control Methods Against Phytopathogenic Bacteria in Tomatoes

Kolomiiets¹,

Grygoryuk²,

Butsenko³

et al. 2019

Appl. Ecol. Env. Res.

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Due to the lack of control over the spread of pathogens and effective pesticides with antibacterial activity bacterial diseases cause significant economic losses in vegetable production including tomatoes. Therefore, the search for ways of biocontrol of bacterial diseases pathogens in vegetable crops is an extremely urgent problem. The literature review presents a systematic analysis of modern measures of agrotechnical, chemical and biotechnological control of bacterial diseases in tomatoes, and increasing the resistance degree of these crops against phytopathogenic bacteria using traditional methods, cell selection and the involvement of genetic engineering approaches. It is shown that agrotechnical measures are preventive in nature, while using chemicals and antibiotics has side effects, in particular phytotoxicity and the appearance of resistant strains of pathogens. Effective and economically viable is the use of biotechnological preparations and the cultivation of the varieties resistant to pathogens of bacterial diseases in vegetable crops. Selection of varieties resistant to phytopathogenic bacteria is based on the use of wild species as resistance sources. The creation of genetically modified plants containing avr-genes, resistance genes against bacterial phytotoxins, PR-proteins and AMP is promising.

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New sources of partial resistance to bacterial spot race T2 in processing tomatoes

Cited by 7 publications

References 17 publications

Standard Area Diagram Set for Bacterial Spot Quantification in Entire-Margined Leaves of Sour Passion Fruit

Standard Area Diagram Set for Bacterial Spot Quantification in Entire-Margined Leaves of Sour Passion Fruit

Genomic and phenotypic insight into Xanthomonas vesicatoria strains with different aggressiveness on tomato

Biotechnological Control Methods Against Phytopathogenic Bacteria in Tomatoes

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