scholarly journals Loss of chloroplast-localized protein phosphatase 2Cs in Arabidopsis thaliana leads to enhancement of plant immunity and resistance to Xanthomonas campestris pv. campestris infection

2017 ◽  
Vol 19 (5) ◽  
pp. 1184-1195 ◽  
Author(s):  
Chiharu Akimoto-Tomiyama ◽  
Shigeru Tanabe ◽  
Hideyuki Kajiwara ◽  
Eiichi Minami ◽  
Hirokazu Ochiai
Keyword(s):  
Arabidopsis Thaliana ◽  
Protein Phosphatase ◽  
Xanthomonas Campestris ◽  
Plant Immunity ◽  
Xanthomonas Campestris Pv Campestris

Identification of a gene in Arabidopsis thaliana that controls resistance to Xanthomonas campestris pv. campestris

1991 ◽  
Vol 38 (1) ◽  
pp. 57-65 ◽  
Author(s):  
Jun Tsuji ◽  
Shauna C. Somerville ◽  
Raymond Hammerschmidt
Keyword(s):  
Arabidopsis Thaliana ◽  
Xanthomonas Campestris ◽  
Xanthomonas Campestris Pv Campestris

scholarly journals Entry of Xanthomonas campestris pv. campestris into Hydathodes of Arabidopsis thaliana Leaves: A System for Studying Early Infection Events in Bacterial Pathogenesis

1998 ◽  
Vol 11 (6) ◽  
pp. 537-543 ◽  
Author(s):  
Véronique Hugouvieux ◽  
Christine E. Barber ◽  
Michael J. Daniels
Keyword(s):  
Arabidopsis Thaliana ◽  
Xanthomonas Campestris ◽  
Histochemical Staining ◽  
Bacterial Suspension ◽  
Surface Sterilization ◽  
Rapid Induction ◽  
Detached Leaves ◽  
Viable Bacteria ◽  
Portal Of Entry ◽  
Xanthomonas Campestris Pv Campestris

Xanthomonas campestris pv. campestris (Xcc) is a vascular pathogen of cruciferous plants that normally gains entry to plants via hydathodes. In order to study the basis of the preference for this portal of entry we have developed an Arabidopsis thaliana model with attached or detached leaves partially immersed in a bacterial suspension. Entry of bacteria into leaves, assessed by resistance to surface sterilization, could be detected after 1 h. Dissection of leaves and histochemical staining for β-glucuronidase produced by the bacteria indicated that they were located in hydathodes. In contrast, similar experiments with the leaf-spotting pathogen X. campestris pv. armoraciae gave patterns of localized staining dispersed over the leaf area, indicative of entry through stomata. A survey of 41 A. thaliana accessions showed that they fell into three classes distinguishable by total numbers of Xcc that entered under standard conditions and by preference for hydathode colonization. Previously isolated Xcc mutants affected in pathogenicity were tested for hydathode colonization: an hrp mutant behaved indistinguishably from the wild type, and rpf regulatory mutants gave 10-fold reduced colonization, whereas with rfaX mutants with altered lipopolysaccharide, few if any viable bacteria were recoverable from hydathodes. This fact, together with the rapid induction of superoxide dismutase in the bacteria located in hydathodes, suggests that an early defense reaction is mounted in the hydathode.

scholarly journals Natural variability in Arabidopsis thaliana germplasm response to Xanthomonas campestris pv. campestris

2007 ◽  
Vol 32 (2) ◽  
pp. 97-103 ◽  
Author(s):  
Lílian S.T. Carmo ◽  
Elizabete S. Cândido ◽  
Pollyanna F. Campos ◽  
Alice Maria Quezado-Duval ◽  
Eduardo Leonardecz ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Xanthomonas Campestris ◽  
High Titer ◽  
Continuous Light ◽  
Brazilian Isolate ◽  
Similar Reduction ◽  
Disease Symptoms ◽  
Model Plant Arabidopsis Thaliana ◽  
Xanthomonas Campestris Pv Campestris ◽  
Plant Arabidopsis Thaliana

This work aimed to study the interaction between the model plant Arabidopsis thaliana and Xanthomonas campestris pv. campestris (Xcc), the pathogen responsible for black rot of crucifers. The response of 32 accessions of A. thaliana to the Brazilian isolate of Xcc CNPH 17 was evaluated. No immunity-like response was observed. "CS1308", "CS1566" and "CS1643" grown in continuous light were among the accessions that showed strongest resistance when inoculated with 5 x 10(6) CFU/mL. In contrast, "CS1194" and "CS1492" were among the most susceptible accessions. Similar results were obtained when plants were grown under short-day conditions. To quantify the differences in disease symptoms, total chlorophyll was extracted from contrasting accessions at different time points after inoculation. Chlorophyll levels from controls and Xcc inoculated plants showed a similar reduction in resistant accessions, whereas Xcc-inoculated susceptible accessions showed a greater reduction compared to controls. To test the specificity of resistance, accessions CS1308, CS1566, CS1643 and CS1438 (which showed partial resistance to CNPH 17), were inoculated with a more aggressive isolate of Xcc (CNPH 77) and Ralstonia solanacearum. Among the accessions tested, "CS1566" was the most resistant to Xcc CNPH 77 and also displayed resistance to R. solanacearum. Accessions CS1308, CS1566 and CS1643 were also inoculated with a high titer of Xcc CNPH 17 (5 x 10(8) CFU/mL). No collapse of tissue was observed up to 48 h after inoculation, indicating that a hypersensitive response is not involved in the resistance displayed by these accessions.

BIOCHEMICAL IDENTIFICATION OF PATOVARS OF THE PATHOGEN OF VASCULAR BACTERIOSIS OF THE CRUCIFEROUS XANTHOMONAS CAMPESTRIS PV. CAMPESTRIS

2020 ◽  
Vol 15 (1) ◽  
pp. 82-88
Author(s):  
Mikhail Kuznetsov ◽  
◽  
Anatoly Scherbakov ◽  
Elena Gorelnikova ◽  
Nadezhda Chervyakova ◽  
...  
Keyword(s):  
Xanthomonas Campestris ◽  
Biochemical Identification ◽  
Xanthomonas Campestris Pv Campestris

Survival of Xanthomonas campestris pv. campestris in the phyllosphere and rhizosphere of crops

2021 ◽  
Author(s):  
João César da Silva ◽  
Tadeu Antônio Fernandes da Silva Júnior ◽  
José Marcelo Soman ◽  
Daniele Maria do Nascimento ◽  
Luana Laurindo de Melo ◽  
...  
Keyword(s):  
Xanthomonas Campestris ◽  
Xanthomonas Campestris Pv Campestris
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