scholarly journals Pectobacterium atrosepticum and Pectobacterium carotovorum Harbor Distinct, Independently Acquired Integrative and Conjugative Elements Encoding Coronafacic Acid that Enhance Virulence on Potato Stems

2016 ◽  
Vol 7 ◽  
Author(s):  
Preetinanda Panda ◽  
Bhanupratap R. Vanga ◽  
Ashley Lu ◽  
Mark Fiers ◽  
Peter C. Fineran ◽  
...  
Keyword(s):  
Pectobacterium Carotovorum ◽  
Pectobacterium Atrosepticum ◽  
Integrative And Conjugative Elements ◽  
Coronafacic Acid

scholarly journals Antagonistic activity of endophytic actinobacteria from native potatoes (Solanum tuberosum subsp. tuberosum L.) against Pectobacterium carotovorum subsp. carotovorum and Pectobacterium atrosepticum

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Natalia Padilla-Gálvez ◽  
Paola Luengo-Uribe ◽  
Sandra Mancilla ◽  
Amandine Maurin ◽  
Claudia Torres ◽  
...  
Keyword(s):  
Solanum Tuberosum ◽  
Plant Root ◽  
Soft Rot ◽  
Quorum Quenching ◽  
Antagonistic Activity ◽  
Pectobacterium Carotovorum ◽  
Double Labeling ◽  
Pectobacterium Atrosepticum ◽  
Tissue Maceration ◽  
Endophytic Actinobacteria

Abstract Background The native potatoes (Solanum tuberosum subsp. tuberosum L.) grown in Chile (Chiloé) represent a new, unexplored source of endophytes to find potential biological control agents for the prevention of bacterial diseases, like blackleg and soft rot, in potato crops. Result The objective of this study was the selection of endophytic actinobacteria from native potatoes for antagonistic activity against Pectobacterium carotovorum subsp. carotovorum and Pectobacterium atrosepticum, and their potential to suppress tissue maceration symptoms in potato tubers. This potential was determined through the quorum quenching activity using a Chromobacterium violaceaum ATCC 12472 Wild type (WT) bioassay and its colonization behavior of the potato plant root system (S. tuberosum) by means of the Double labeling of oligonucleotide probes for fluorescence in situ hybridization (DOPE-FISH) targeting technique. The results showed that although Streptomyces sp. TP199 and Streptomyces sp. A2R31 were able to inhibit the growth of the pathogens, only the Streptomyces sp. TP199 isolate inhibited Pectobacterium sp. growth and diminished tissue maceration in tubers (p ≤ 0.05). Streptomyces sp. TP199 had metal-dependent acyl homoserine lactones (AHL) quorum quenching activity in vitro and was able to colonize the root endosphere 10 days after inoculation. Conclusions We concluded that native potatoes from southern Chile possess endophyte actinobacteria that are potential agents for the disease management of soft rot and blackleg.

scholarly journals Sunflower Stalk Diseases Initiated Through Leaf Infections

2018 ◽  
Vol 19 (1) ◽  
pp. 82-91 ◽  
Author(s):  
Robert Harveson ◽  
Febina Mathew ◽  
Thomas Gulya ◽  
Samuel Markell ◽  
Charles Block ◽  
...  
Keyword(s):  
Disease Management ◽  
Stem Canker ◽  
Fungal Diseases ◽  
Pectobacterium Carotovorum ◽  
Pectobacterium Atrosepticum ◽  
Stalk Rot ◽  
Carotovorum Subsp ◽  
Management Techniques ◽  
Rot Disease ◽  
Phoma Macdonaldii

This article describes three distinct sunflower stalk diseases that are caused by pathogens that primarily begin as foliar infections. Included are two similar fungal diseases: Phoma black stem and Phomopsis stem canker, caused by Phoma macdonaldii and two species of Diaporthe (helianthi and gulyae), respectively. The bacterial stalk rot disease caused by Pectobacterium carotovorum subsp. carotovorum and Pectobacterium atrosepticum is also included for comparison. We provide information on how to identify the diseases and distinguish them from each other with signs, symptoms, and biological characteristics of the pathogens. It is important to learn to recognize and differentiate these three diseases, because only one (Phomopsis stem canker) is considered to be economically damaging. Misidentification could result in utilizing unneeded disease management techniques.

scholarly journals Physicochemical Basis for the Inhibitory Effects of Organic and Inorganic Salts on the Growth of Pectobacterium carotovorum subsp. carotovorum and Pectobacterium atrosepticum

2008 ◽  
Vol 75 (5) ◽  
pp. 1465-1469 ◽  
Author(s):  
Elian-Simplice Yaganza ◽  
Russell J. Tweddell ◽  
Joseph Arul
Keyword(s):  
Liquid Medium ◽  
Bacterial Growth ◽  
Inhibitory Action ◽  
Inorganic Salts ◽  
Pectobacterium Carotovorum ◽  
Strong Inhibition ◽  
Inhibitory Effects ◽  
Pectobacterium Atrosepticum ◽  
Physicochemical Basis ◽  
Carotovorum Subsp

ABSTRACT Twenty-one salts were tested for their effects on the growth of Pectobacterium carotovorum subsp. carotovorum and Pectobacterium atrosepticum. In liquid medium, 11 salts (0.2 M) exhibited strong inhibition of bacterial growth. The inhibitory action of salts relates to the water-ionizing capacity and the lipophilicity of their constituent ions.

scholarly journals Isolation and efficacy of two bacterial strains antagonists of Erwinia amylovora and Pectobacterium carotovorum

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
M’hamed BENADA ◽  
Boualem BOUMAAZA ◽  
Sofiane BOUDALIA ◽  
Omar KHALADI
Keyword(s):  
Fire Blight ◽  
Erwinia Amylovora ◽  
Bacterial Species ◽  
Crop Protection ◽  
Soft Rot ◽  
Causal Agent ◽  
Plant Diseases ◽  
Ecological Niches ◽  
Pectobacterium Carotovorum ◽  
Bacterial Strains

Abstract Background The development of ecofriendly tools against plant diseases is an important issue in crop protection. Screening and selection process of bacterial strains antagonists of 2 pathogenic bacterial species that limit very important crops, Erwinia amylovora, the causal agent of the fire blight disease, and Pectobacterium carotovorum, the causal agent of bacterial potato soft rot, were reported. Bacterial colonies were isolated from different ecological niches, where both pathogens were found: rhizosphere of potato tubers and fruits and leaves of pear trees from the northwest region of Algeria. Direct and indirect confrontation tests against strains of E. amylovora and P. carotovorum were performed. Results Results showed a significant antagonistic activity against both phytopathogenic species, using direct confrontation method and supernatants of cultures (p<0.005). In vitro assays showed growth inhibitions of both phytopathogenic species. Furthermore, results revealed that the strains of S. plymuthica had a better inhibitory effect than the strains of P. fluorescens against both pathogens. In vivo results on immature pear fruits showed a significant decrease in the progression of the fire blight symptoms, with a variation in the infection index from one antagonistic strain to another between 31.3 and 50%, and slice of potato showed total inhibition of the pathogen (P. carotovorum) by the antagonistic strains of Serratia plymuthica (p<0.005). Conclusion This study highlighted that the effective bacteria did not show any infection signs towards plant tissue, and considered as a potential strategy to limit the fire blight and soft rot diseases.

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