Resistance of genotypes and defence compounds against bacterial halo blight of coffee

2021 ◽  
Author(s):  
Stéfanny Araújo Martins ◽  
Mário Lúcio Vilela Resende ◽  
Ana Cristina Andrade Monteiro ◽  
Wilder Douglas Santiago ◽  
Victor Augusto Maia Vasconcelos ◽  
...  
Keyword(s):  
Halo Blight

Resistance to halo-blight in the Cambridge accessions V4604 and V4058 of Phaseolus beans

1984 ◽  
Vol 104 (2) ◽  
pp. 307-314 ◽  
Author(s):  
N. L. INNES ◽  
JANET CONWAY ◽  
J. D. TAYLOR
Keyword(s):  
Halo Blight

scholarly journals Chemical Composition, Production of Secondary Metabolites and Antioxidant Activity in Coffee Cultivars Susceptible and Partially Resistant to Bacterial Halo Blight

Plants ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 1915
Author(s):  
Joyce Alves Goulart da Silva ◽  
Mário Lúcio Vilela de Resende ◽  
Ingridy Simone Ribeiro ◽  
Adriene Ribeiro Lima ◽  
Luiz Roberto Marques Albuquerque ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Chemical Composition ◽  
Secondary Metabolites ◽  
Pseudomonas Syringae ◽  
Total Phenolic ◽  
Leaf Extracts ◽  
Defense Strategies ◽  
Halo Blight ◽  
Phenolic Profiles ◽  
Phenolic And Flavonoid

Coffee production is one of the main agricultural activities in Brazil, and several coffee cultivars with disease resistance have already been developed. The secondary metabolites produced by plants are closely associated with defense strategies, and the resistance of coffee cultivars to bacterial halo blight (BHB) can be related to these compounds. Therefore, this study aims to compare a partially resistant coffee cultivar (Iapar-59) and a susceptible cultivar (Mundo Novo 376/4) to BHB (Pseudomonas syringae pv. garcae) in relation to the chemical composition and antioxidant activity of the leaf extracts. In addition, this study determined the total phenolic and flavonoid contents and phenolic profiles of the Iapar-59 leaf extracts of plants inoculated with P. syringae pv. garcae. The Iapar-59 extract showed a higher content of phenolic compounds and flavonoids than the Mundo Novo 376/4 extract. Both cultivars contained gallic, chlorogenic and caffeic acids; however, the highest contents were quantified in the Iapar-59 cultivar. The leaf extracts from the Iapar-59 cultivar exhibited higher antioxidant activity. Higher concentrations of gallic, caffeic and chlorogenic acids and the presence of vanillin were detected in the extract of cultivar Iapar-59 inoculated with P. syringae pv. garcae.

scholarly journals Isolation and Characterization of the Gene Coding for the Amidinotransferase Involved in the Biosynthesis of Phaseolotoxin in Pseudomonas syringae pv. phaseolicola

2001 ◽  
Vol 14 (4) ◽  
pp. 545-554 ◽  
Author(s):  
Gustavo Hernández-Guzmán ◽  
Ariel Alvarez-Morales
Keyword(s):  
Aspartic Acid ◽  
Pseudomonas Syringae ◽  
Sequence Similarity ◽  
Insertion Mutant ◽  
Halo Blight ◽  
Streptomyces Spp ◽  
Isolation And Characterization ◽  
Gene Coding ◽  
Blight Disease

Pseudomonas syringae pv. phaseolicola is the causal agent of the “halo blight” disease of beans. A key component in the development of the disease is a nonhost-specific toxin, Nδ-(N'-sulphodiaminophosphinyl)-ornithyl-alanyl-homoarginine, known as phaseolotoxin. The homoarginine residue in this molecule has been suggested to be the product of Larginine:lysine amidinotransferase activity, previously detected in extracts of P. syringae pv. phaseolicola grown under conditions of phaseolotoxin production. We report the isolation and characterization of an amidinotransferase gene (amtA) from P. syringae pv. phaseolicola coding for a polypeptide of 362 residues (41.36 kDa) and showing approximately 40% sequence similarity to Larginine:inosamine-phosphate amidinotransferase from three species of Streptomyces spp. and 50.4% with an Larginine:glycine amidinotransferase from human mitochondria. The cysteine, histidine, and aspartic acid residues involved in substrate binding are conserved. Furthermore, expression of the amtA and argK genes and phaseolotoxin production occurs at 18°C but not at 28°C. An amidinotransferase insertion mutant was obtained that lost the capacity to synthesize homoarginine and phaseolotoxin. These results show that the amtA gene isolated is responsible for the amidinotransferase activity detected previously and that phaseolotoxin production depends upon the activity of this gene.

INHIBITION OF PLANT PATHOGENIC BACTERIA IN VITRO BY ANTIBIOTICS AND QUATERNARY AMMONIUM COMPOUNDS

1951 ◽  
Vol 29 (3) ◽  
pp. 270-278 ◽  
Author(s):  
H. Katznelson ◽  
M. D. Sutton
Keyword(s):  
Quaternary Ammonium ◽  
Pathogenic Bacteria ◽  
Relative Sensitivity ◽  
Quaternary Ammonium Compounds ◽  
Halo Blight ◽  
Corynebacterium Species ◽  
Xanthomonas Species ◽  
Series Of Experiments ◽  
Ammonium Compounds

The bacteriostatic effect of certain antibiotics and quaternary ammonium compounds on representative genera and species of phytopathogenic bacteria has been studied. For Xanthomonas species aureomycin was the most potent agent with terramycin and polymyxin next; 0.1 to 0.05 p.p.m. aureomycin completely inhibited growth of most of the cultures at 24 hr. Terramycin was the most effective compound against Pseudomonas species followed by streptomycin and qureomycin; 0.2 to 0.1 p.p.m. terramycin inhibited growth of every culture tested with one exception. For Corynebacterium species aureomycin was most effective with neomycin and terramycin next, the activity of aureomycin varying from 0.4 to 0.05 p.p.m. Chloromycetin was the least effective of the antibiotics tested in the series of experiments. A comparision of the relative sensitivity of the three genera to a given antibiotic revealed that aureomycin and polymyxin were most effective on Xanithomonas, terramycin and streptomycin on Pseudomonas, and neomycin and chloromycetin on Corynecarotovora to polymyxin. the latter organism was generally more resistant to the antibiotics than the former. A number of other antibiotics and quaternaries: streptothricin, clavacin, gliotoxin, aspergillic acid, tyrothricin, penicillin, Roccal, Hyamine 1622, and compound L4-669 were also tested against strains of X. phaseoli and P> phaseolicola (agents of common and halo blight respectively of beans). None of these was as effective as aureomycin, polymyxin, streptomycin, or terramycin, the activity of the quaternaries being similar on the whole to that of chloromycetin.

The incidence of bacterial blights of French bean (Phaseolus vulgaris) in East Gippsland, Victoria

1978 ◽  
Vol 18 (91) ◽  
pp. 318
Author(s):  
DLS Wimalajeewa ◽  
RJ Nancarrow
Keyword(s):  
Phaseolus Vulgaris ◽  
Severe Disease ◽  
French Bean ◽  
Brown Spot ◽  
French Beans ◽  
Halo Blight ◽  
Growing Seasons ◽  
Relationship Of ◽  
The Relationship

The incidence of common blight, halo blight and brown spot on French beans was surveyed in the Bairnsdale-Lindenow and Orbost areas in East Gippsland during the 1975-76 and 1976-77 growing seasons. Common blight and halo blight were severe only during late January to March, and occurred largely on mature crops. Common blight was the more severe disease in the Orbost area whereas halo blight was more severe in the Bairnsdale-Lindenow area. Brown spot occurred throughout the season on crops of all ages in both areas but was more severe in the Bairnsdale-Lindenow area. The relationship of weather to the incidence of bacterial blights in the two areas is discussed. It is inferred that losses due to common blight and halo blight could be considerably minimized by timing the planting of crops to harvest them by mid-February.

Survival in soil of bacteria causing common and halo blights of French bean in Victoria

1980 ◽  
Vol 20 (102) ◽  
pp. 102 ◽  
Author(s):  
DLS Wimalajeewa ◽  
RJ Nancarrow
Keyword(s):  
Soil Surface ◽  
Growing Season ◽  
French Bean ◽  
Infected Leaf ◽  
Halo Blight ◽  
Field Situation ◽  
Pseudomonas Phaseolicola

Survival of Pseudomonas phaseolicola and Xanthomonas phaseoli in soil between successive bean crops was studied in a field situation at Bairnsdale. P. phaseolicola and X. phaseoli survived on nylon netting for maximum periods of 6 and 3 weeks, respectively, on the soil surface, and for 6 and 2 weeks when buried. On infected leaf, stem and pod tissue P. phaseolicola survived for 20 weeks on the soil surface and for 11 weeks when buried; X. phaseoli survived up to 11 weeks on the soil surface and for 3 weeks when buried. In heavily infected bean plots neither pathogen was carried over from one growing season to the next. It is concluded that infected bean debris in the soil from the previous growing season is not a source of common and halo blight infection in East Gippsland.

Aggressiveness of Strains and Inoculation Methods for Resistance Assessment to Bacterial Halo Blight on Coffee Seedlings

2016 ◽  
Vol 165 (2) ◽  
pp. 105-114 ◽  
Author(s):  
Lucas M. R. Rodrigues ◽  
Irene M. G. Almeida ◽  
Flávia R. A. Patrício ◽  
Luís O. S. Beriam ◽  
Karen W. Maciel ◽  
...  
Keyword(s):  
Inoculation Methods ◽  
Halo Blight ◽  
Resistance Assessment
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