THE OCCURRENCE IN THE HOST PLANT OF PHYSIOLOGICALLY ACTIVE GUMS PRODUCED BY CORYNEBACTERIUM INSIDIOSUM AND CORYNEBACTERIUM SEPEDONICUM

1961 ◽  
Vol 7 (2) ◽  
pp. 185-188 ◽  
Author(s):  
J. F. T. Spencer ◽  
P. A. J. Gorin
Keyword(s):  
Host Plant ◽  
Bacterial Wilt ◽  
Land Plants ◽  
Corynebacterium Sepedonicum ◽  
Potato Plants ◽  
Ring Rot ◽  
Causative Agents ◽  
Potato Ring Rot

Corynebacterium insidiosum and Corynebacterium sepedonicum, the causative agents of bacterial wilt of alfalfa and of potato ring rot, produce viscous polysaccharide solutions when grown in shaken culture. These substances contain fucose, a sugar rarely found in polysaccharides of land plants. Hydrolyzates of polysaccharides extracted from alfalfa and potato plants infected with these organisms also contained fucose, while extracts of healthy plants did not. Alfalfa cuttings placed in dilute polysaccharide solutions wilted rapidly. These findings suggest that these polysaccharides are probably formed in the vascular systems of infected plants and that if such is the case they contribute to the development of the disease in these plants.

Bacterial wilt of potatoes. II. Serological relationship of two strains of Pseudomonas solanacearum and a culture of Corynebacterium sepedonicum

1961 ◽  
Vol 12 (5) ◽  
pp. 872 ◽  
Author(s):  
DE Harrison ◽  
H Freeman
Keyword(s):  
Bacterial Wilt ◽  
Pseudomonas Solanacearum ◽  
Serological Relationship ◽  
Corynebacterium Sepedonicum ◽  
Potential Value ◽  
Ring Rot ◽  
The Common ◽  
Relationship Of

Antisera were prepared to Victorian and Rhodesian strains of Pseudomonas solanacearum, and to a culture of the ring rot organism, Corynebacterium sepedonicum, from Canada. It was found that the two strains of Ps. Solanacearum were similar, though distinct serologically, and each quite different from C. sepedonicum, although there was some serological affinity between the three organisms. The common agglutinins were absorbed to produce specific absorbed serum for each organism, the potential value of which is briefly discussed.

ENDOPHYTIC BACTERIAL FLORA IN SOLANUM TUBEROSUM AND ITS SIGNIFICANCE IN BACTERIAL RING ROT DIAGNOSIS

1974 ◽  
Vol 54 (1) ◽  
pp. 115-122 ◽  
Author(s):  
S. H. DE BOER ◽  
R. J. COPEMAN
Keyword(s):  
Solanum Tuberosum ◽  
Bacterial Population ◽  
Bacterial Flora ◽  
Stem Tissue ◽  
Bacterial Ring Rot ◽  
Bacterial Populations ◽  
Corynebacterium Sepedonicum ◽  
Potato Plants ◽  
Ring Rot ◽  
Significant Difference

The aerobic endophytic bacterial population in "healthy" potato plants was found to vary from fewer than 1 × 103 to 4.2 × 107 cells/cm3 of stem tissue and from 0 to 1.6 × 104 cells/cm3 in tubers. No significant correlation was found between the bacterial population in stems and tubers of the same plant, nor was there a significant difference in the bacterial populations of virus-free plants when compared with PVX-infected plants. Strains of Micrococcus, Pseudomonas, Bacillus, Flavobacterium, Xanthomonas, Agrobacterium, and coryneforms were isolated in addition to several isolates that could not be identified. All isolates were nonpathogenic, including the coryneforms, some of which were morphologically indistinguishable from Corynebacterium sepedonicum but which were biochemically different.

scholarly journals Selenium Nanocomposites in Natural Matrices as Potato Recovery Agent

2021 ◽  
Vol 22 (9) ◽  
pp. 4576
Author(s):  
Alla I. Perfileva ◽  
Olga A. Nozhkina ◽  
Tatjana V. Ganenko ◽  
Irina A. Graskova ◽  
Boris G. Sukhov ◽  
...  
Keyword(s):  
Rhodococcus Erythropolis ◽  
Soil Bacterium ◽  
Cultivated Plants ◽  
Potato Plants ◽  
Ring Rot ◽  
Negative Effect ◽  
Environmentally Safe ◽  
Potato Ring Rot ◽  
Potato Plants In Vitro

The paper presents a study of the effect of chemically synthesized selenium nanocomposites (Se NCs) in natural polymer matrices arabinogalactan (AG) and starch (ST) on the viability of the potato ring rot pathogen Clavibacter sepedonicus (Cms), potato plants in vitro, and the soil bacterium Rhodococcus erythropolis. It was found that the studied Se NCs have an antibacterial effect against the phytopathogenic Cms, reducing its growth rate and ability to form biofilms. It was revealed that Se NC based on AG (Se/AG NC) stimulated the growth and development of potato plants in vitro as well as their root formation. At the same time, Se did not accumulate in potato tissues after the treatment of plants with Se NCs. The safety of the Se NCs was also confirmed by the absence of a negative effect on the growth and biofilm formation of the soil bacterium R. erythropolis. The obtained results indicate that Se NCs are promising environmentally safe agents for the protection and recovery of cultivated plants from phytopathogenic bacteria.

Sur la nutrition aminée de Corynebacterium sepedonicum (Spieck. et Kott.) Skapt. et Burkh. et la résistance de la pomme de terre au flétrissement bactérien

1970 ◽  
Vol 16 (8) ◽  
pp. 719-726 ◽  
Author(s):  
Roger Paquin ◽  
Robert A. Lachance
Keyword(s):  
Amino Acids ◽  
Bacterial Growth ◽  
Slow Growth ◽  
Casein Hydrolysate ◽  
Aminobutyric Acid ◽  
Corynebacterium Sepedonicum ◽  
Ring Rot ◽  
Pomme De Terre ◽  
Potato Ring Rot ◽  
Host Tissues

Corynebacterium sepedonicum can grow in a medium containing only two amino acids: asparagine and methionine as sources of nitrogen. In the presence of cystine, γ-aminobutyric acid, β-alanine, glycine, and ethanolamine, the growth of the organism was inhibited or retarded. Even in the presence of casein hydrolysate, cystine inhibits the bacterial growth. The presence of cystine and certain other amino acids in the tissues of potatoes could, in part, explain the slow growth of the organism in the host tissues, the late appearance of the potato ring rot symptoms, and the resistance of certain potato varieties to ring rot.

Positive effect of preparations with antiviral properties on potato productivity

2020 ◽  
Author(s):  
M.S. Kolychikhina ◽  
Keyword(s):  
Acid Ethyl Ester ◽  
Comparative Assessment ◽  
Marketable Yield ◽  
Potato Plants ◽  
Russian State ◽  
Causative Agents ◽  
Small Plot ◽  
Positive Effect ◽  
Production Conditions ◽  
Chitosan Lactate

In the small-plot experiment of the Russian State Agrarian University - Moscow Timiryazev Agricultural Academy against potato viruses in 2014-2019 were tested some kinds of preparations with antiviral activity: Pharmayod, GS (100 g/l of iodine); Immunocytophyte, TAB (20 g/kg arachidonic acid ethyl ester); Ecogel, WS (30 g/l of chitosan lactate); Amulet, TAB (composition of linear polyaminosaccharides (chitosan) in succinic acid solution); Zerox, WS (3000 mg /l colloidal silver); Viron, WS (biostimulant based on urea and citric acid with the addition of essential oils). According to the results of the studies, it was found that, in addition to the effect on the causative agents of viral diseases of potatoes, all tested preparations had a stable tendency to maintain or increase the yield of tubers of infected plants. The increase in the yield of tubers ranged from 0.5 to 1.3 kg/m2. In 2016 under the production conditions of Astrakhan region on the potato variety Impala infected with the PVM + PVS and PVM + PVS + PVY virus complexes a comparative assessment of the effect of Pharmayod and Immunocytophyte revealed a significant increase in the gross and marketable yield of potato plants in the areas with the use of these preparations compared to with control.

Effect of Selenium-containing Biocomposites from Medicinal Mushrooms on the Potato Ring Rot Causative Agent

2018 ◽  
Vol 479 (1) ◽  
pp. 67-69
Author(s):  
A. I. Perfileva ◽  
O. M. Tsivileva ◽  
Ya. B. Drevko ◽  
D. N. Ibragimova ◽  
O. V. Koftin
Keyword(s):  
Causative Agent ◽  
Medicinal Mushrooms ◽  
Ring Rot ◽  
Potato Ring Rot
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