scholarly journals Antagonistic bacteria in the soil after cover crops cultivation

2014 ◽  
Vol 60 (No. 2) ◽  
pp. 69-73 ◽  
Author(s):  
E. Patkowska ◽  
M. Konopiński
Keyword(s):  
Cover Crops ◽  
Total Population ◽  
Dry Weight ◽  
Antagonistic Effect ◽  
Soil Samples ◽  
Quantitative Composition ◽  
Antagonistic Bacteria ◽  
Pseudomonas Spp ◽  
Bacillus Spp ◽  
Soil Borne Fungi

The purpose of the studies was to establish the quantitative composition of bacteria Bacillus spp. and Pseudomonas spp. and their antagonistic effect towards soil-borne fungi after the cultivation of oats, spring vetch and tansy phacelia as intercrop cover plants. The total population of bacteria in 1 g dry weight of the soil from the experimental combination where mulch of oats was used was larger than in the combination with spring vetch or tansy phacelia. Totally, approximately three times as much Bacillus spp. was obtained from soil samples as compared to Pseudomonas spp. Tests showed that the most isolates of antagonistic bacteria out of the enumerated genera occurred in the soil after oats cultivation, and the least in the soil after the cultivation of tansy phacelia. Antagonistic Bacillus spp. and Pseudomonas spp. inhibited the growth and development of Fusarium oxysporum, Haematonectria haematococca and Thanatephorus cucumeris in the most effective way. The greatest total antagonistic effect of Bacillus spp. and Pseudomonas spp. towards Altenaria alternata, F. culmorum, F. oxysporum, H. haematococca, P. irregulare and T. cucumeris was found out after managing the mulch of oats. The smallest total antagonistic effect of bacteria was observed after managing the mulch of tansy phacelia.

scholarly journals Antagonistic activity of selected bacteria occurring in the soil after root chicory cultivation

2014 ◽  
Vol 60 (No. 7) ◽  
pp. 320-324 ◽  
Author(s):  
E. Patkowska ◽  
M. Konopiński
Keyword(s):  
Cover Crops ◽  
Total Population ◽  
Fusarium Culmorum ◽  
Antagonistic Activity ◽  
Antagonistic Effect ◽  
Common Vetch ◽  
Mineral Salts ◽  
Pseudomonas Spp ◽  
Bacillus Spp ◽  
Positive Effect

Chicory (Cichorium intybus L.) is a rich source of polysaccharides (intibin and inulin), vitamins, acids and mineral salts. The present studies determined the antagonistic activity of selected bacteria of the soil environment of root chicory towards fungi pathogenic towards this plant: Alternaria alternata, Botrytis cinerea, Fusarium culmorum, F. oxysporum, Thanatephorus cucumeris and Sclerotinia sclerotiorum. Root chicory was cultivated with using cover crops (oats, tansy phacelia and common vetch). The use of cover crops, especially oats, in the cultivation of root chicory had a positive effect both on the total population of bacteria and the population of Bacillus spp. and Pseudomonas spp. in the soil. Antagonistic Bacillus spp. and Pseudomonas spp. displayed differentiated activity towards the studied fungi. The greatest antagonistic effect was found out after the mulch of oats. After common vetch, the antagonistic activity of bacteria was more than twice, and after phacelia three times as low as after oats. In the traditional cultivation of root chicory this activity was nearly twelve times lower.

scholarly journals Antagonistic activity of selected bacteria of the soil environment of carrot

2017 ◽  
Vol 63 (No. 6) ◽  
pp. 277-281
Author(s):  
Patkowska Elżbieta ◽  
Błażewicz-Woźniak Marzena ◽  
Wach Dariusz
Keyword(s):  
Cover Crops ◽  
Avena Sativa ◽  
Growth And Development ◽  
Laboratory Tests ◽  
Experimental Treatment ◽  
Antagonistic Activity ◽  
Antagonistic Effect ◽  
Soil Environment ◽  
Pseudomonas Spp ◽  
Bacillus Spp

The purpose of the present studies was to determine the antagonistic effect of bacteria Bacillus spp. and Pseudomonas spp. towards selected fungi from the soil environment of carrot. Oats (Avena sativa L.), tansy phacelia (Phacelia tanacetifolia Bentham) and vetch (Vicia satica L.) were used as cover crops in the cultivation of this plant. In the traditional cultivation of carrot the population of bacteria was the smallest, while after the application of oats it was the largest. Laboratory tests showed that cover crops promoted the development of antagonistic Bacillus spp. and Pseudomonas spp. Irrespective of the experimental treatment, those bacteria were the most effective in limiting the growth and development of Fusarium oxysporum and Thanatephorus cucumeris (syn. Rhizoctonia solani), while being less effective towards Altenaria dauci and Alternaria radicina, and the least towards Sclerotinia sclerotiorum. The best total antagonistic effect of Pseudomonas spp. and Bacillus spp. towards the tested fungi was found after using oats and vetch, while the worst – in the traditional cultivation of carrot.

scholarly journals Antagonistic bacteria in the soil after Daucus carota L. cultivation

2018 ◽  
Vol 64 (No. 3) ◽  
pp. 120-125
Author(s):  
Patkowska Elżbieta
Keyword(s):  
Sclerotinia Sclerotiorum ◽  
Daucus Carota ◽  
Pathogenic Fungi ◽  
Antagonistic Activity ◽  
Antagonistic Effect ◽  
Antagonistic Bacteria ◽  
White Mustard ◽  
Daucus Carota L ◽  
Pseudomonas Spp ◽  
Bacillus Spp

The studies determined the effect of bacteria Bacillus spp. and Pseudomonas spp. isolated from the soil after carrot cultivation on pathogenic fungi Altenaria dauci, A. radicina, Fusarium oxysporum, F. solani, Rhizoctonia solani and Sclerotinia sclerotiorum. A field experiment on carrot cultivation considered different intercrop plants (rye, buckwheat, white mustard, sunflower). Rye and buckwheat were the most conducive to the growth of Bacillus spp. and Pseudomonas spp. Those bacteria were the most effective in inhibiting the growth of F. solani, F. oxysporum and R. solani. The antagonistic effect of soil-borne Bacillus spp. and Pseudomonas spp. towards the tested fungi was the largest after the application of rye and white mustard as intercrop plants in the cultivation of carrot. Buckwheat and sunflower showed a slightly smaller influence on the antagonistic activity of the studied bacteria. Bacillus ssp. had a significantly lesser antagonistic effect than Pseudomonas ssp.

scholarly journals Antagonistic activity of selected fungi of the soil environment of carrot

2018 ◽  
Vol 64 (No. 2) ◽  
pp. 58-63 ◽  
Author(s):  
Patkowska Elżbieta ◽  
Jamiołkowska Agnieszka ◽  
Błażewicz-Woźniak Marzena
Keyword(s):  
Sclerotinia Sclerotiorum ◽  
Cover Crops ◽  
Cover Crop ◽  
Experimental Treatment ◽  
Dry Weight ◽  
Antagonistic Activity ◽  
Antagonistic Effect ◽  
Soil Environment ◽  
Trichoderma Spp ◽  
Penicillium Spp

The present studies aim at determining the antagonistic effect of selected fungi species occurring in the soil under carrot cultivation towards Altenaria dauci (J.G. Kühn) J.W. Groves & Skolko, Alternaria radicina Meier, Drechsler & E.D. Eddy, Fusarium oxysporum E.F. Sm & Swingle, Rhizoctonia solani J.G. Kühn and Sclerotinia sclerotiorum (Lib.) de Bary. The field experiment considered cover crops (oats, tansy phacelia and vetch). The control consisted of traditional carrot cultivation (without cover crops). Statistically, the smallest population of fungi was found in 1 g of soil dry weight after the application of oats, and a slightly bigger – after tansy phacelia and vetch. The largest population of fungi was obtained in the traditional cultivation of carrot. Cover crops contributed to the increase of the population of antagonistic Clonostachys spp., Myrothecium spp., Penicillium spp. and Trichoderma spp. in the soil. Regardless of the experimental treatment, those antagonistic fungi were the most effective in limiting the growth of S. sclerotiorum, A. dauci and A. radicina. The effect of those fungi was a little smaller towards F. oxysporum and R. solani. Oats as a cover crop had the best effect on the antagonistic activity of the studied fungi occurring in the soil environment of carrot.

scholarly journals SOIL-BORNE MICROORGANISMS THREATENING CARROT CULTIVATED WITH THE USE OF COVER CROPS

2020 ◽  
Vol 19 (4) ◽  
pp. 71-86 ◽  
Author(s):  
Elżbieta Patkowska
Keyword(s):  
Cover Crops ◽  
Soil Microorganisms ◽  
Pathogenic Fungi ◽  
Trichoderma Spp ◽  
Saprotrophic Fungi ◽  
Daucus Carota L ◽  
Alternaria Dauci ◽  
Bacillus Spp ◽  
Positive Effect ◽  
Soil Borne Fungi

Cover crops are used in the cultivation of various plants. They properly modify the composition of soil microorganisms and can protect of plants from phytopathogens. The purpose of the field and laboratory studies was to determine the quantitative and qualitative composition of microorganisms in the soil under carrot cultivated with the use of oats, tansy phacelia and spring vetch as cover crops. The paper presents also studies on soil-borne fungi threatening the healthiness of carrot roots. In the conventional cultivation of carrot the population of bacteria (including Pseudomonas spp. and Bacillus spp.) was the smallest, while after the application of oats it was the largest. Oats and spring vetch were most effective in limiting the occurrence of soil-borne fungi. Those plants and tansy phacelia caused an increase of the population of saprotrophic fungi (Albifimbria spp., Clonostachys spp. and Trichoderma spp.) in the soil. Intercrop plants had a positive effect on the healthiness of carrot seedlings and roots. Alternaria dauci, A. alternata, A. radicina, Fusarium oxysporum, Globisporangium irregulare, Neocosmospora solani, Phytophthora sp., Rhizoctonia solani and Sclerotinia sclerotiorum proved to be the most harmful towards the studied underground parts of carrot. Oats proved to be the most effective in inhibiting the occurrence of the pathogenic fungi for Daucus carota L.

scholarly journals COVER CROPS AND SOIL-BORNE FUNGI DANGEROUS TOWARDS THE CULTIVATION OF Daucus carota L.

2021 ◽  
Vol 20 (2) ◽  
pp. 3-12
Author(s):  
Elżbieta Patkowska
Keyword(s):  
Cover Crops ◽  
Daucus Carota ◽  
Experimental Treatment ◽  
Soil Tillage ◽  
Quantitative Composition ◽  
White Mustard ◽  
Cultivation System ◽  
Daucus Carota L ◽  
Horticultural Practice ◽  
Soil Borne Fungi

The principles of good agricultural and horticultural practice, which considers both environmental protection and high yielding of plants, require modern methods of cultivation. Cover crops are used in the cultivation of various plants, including root vegetables such as carrot. The purpose of field and laboratory studies was to determine the effect of selected cover crops on the healthiness of carrot (Daucus carota L.). The field experiment took into consideration cover crops such as spring rye, white mustard, buckwheat, fodder sunflower and two systems of soil tillage, i.e.: tillage before winter (ploughing) + spring tillage (a combined cultivator) and only spring tillage (a combined cultivator). In each experimental treatment, the number and healthiness of carrot seedlings were determined. A laboratory mycological analysis made it possible to determine the qualitative and quantitative composition of fungi infecting the underground parts of carrot. Good emergencies and the healthiness of carrot plants were observed in the objects with rye and white mustard as cover crops. The cultivation system had no significant effect on the proportion of diseased seedlings of carrot. Rye and white mustard were more effective than buckwheat and sunflower in limiting  the occurrence of fungi pathogenic towards carrot. Diseased seedlings and roots after harvest of carrot were most frequently colonized by Altenaria alternata, A. chartarum, A. dauci, A. radicina, Sclerotinia sclerotiorum, Rhizoctonia solani and Fusarium spp.

scholarly journals Occurrence of antagonistic fungi in the soil after cover crops cultivation

2014 ◽  
Vol 60 (No. 5) ◽  
pp. 204-209 ◽  
Author(s):  
E. Patkowska ◽  
M. Konopiński
Keyword(s):  
Cover Crops ◽  
Growth And Development ◽  
Plant Pathogens ◽  
Total Population ◽  
Fusarium Culmorum ◽  
Antagonistic Activity ◽  
Antagonistic Effect ◽  
Fusarium Spp ◽  
Pythium Irregulare ◽  
Antagonistic Fungi

The purpose of the studies was to determine the species composition of fungi and their antagonistic effect towards soil-borne plant pathogens after the cultivation of oats, spring vetch and tansy phacelia as intercrop cover plants. The total population of fungi in the soil after the cultivation of oats was twice as low as after the cultivation of tansy phacelia. A little smaller fungi population was obtained as a result of mulching the soil with spring vetch in comparison to that after the cultivation of tansy phacelia. The proportion of Fusarium spp., Alternaria alternata, Pythium irregulare and Thanatephorus cucumeris isolated from the soil after the cultivation of oats was the lowest one, while being a little higher after the cultivation of spring vetch, and the highest after tansy phacelia. The greatest number of antagonistic fungi occurred in the soil after ploughing in the mulch of oats. Antagonistic fungi isolated from the soil mulched with oats were the most effective in limiting the growth and development of A. alternata, Fusarium culmorum, F. oxysporum, Haematonectria haematococca, P. irregulare and T. cucumeris since the value of their antagonistic effect was the largest. The lowest antagonistic activity of fungi was found out after using tancy phacelia.

scholarly journals Effect of Plant Growth Promoting Bacillus spp. on Germination and Seedling Growth of Soybean

2022 ◽  
Author(s):  
D. Miljaković ◽  
J. Marinković ◽  
G. Tamindžić ◽  
V. Đorđević ◽  
M. Ignjatov ◽  
...  
Keyword(s):  
Plant Growth ◽  
Dry Weight ◽  
Macrophomina Phaseolina ◽  
Phytopathogenic Fungi ◽  
Antagonistic Effect ◽  
Vegetable Crops ◽  
Bacterial Isolates ◽  
Shoot Dry Weight ◽  
Bacillus Spp ◽  
Plant Growth Promoting

Background: Bacillus spp., known to promote growth and reduce disease of various field and vegetable crops, are frequently found in soils. The objective of the study was to select effective Bacillus spp. isolates with multiple plant growth properties and antifungal activities and to examine their effect on germination of soybean. Methods: Bacterial isolates were screened for production of indole-3-acetic acid (IAA) and siderophores and solubilization of phosphate. The ability of bacterial isolates to inhibit the growth of seven phytopathogenic fungi affecting soybean was determined using a dual plate assay. Bacillus spp. were further selected and examined in a seed germination test. Result: All Bacillus spp. isolates were positive for IAA production, while siderophore production and P-solubilization were observed in 80% and 20% bacterial isolates, respectively. Bacillus spp. exhibited the highest antifungal activity against Diaporthe caulivora, followed by Diaporthe sojae, Diaporthe eres, Diaporthe longicolla and Macrophomina phaseolina and the least antagonistic effect toward Fusarium graminearum and Fusarium subglutinans. Selected isolates of B. subtilis significantly affected final germination, shoot length, root length, shoot dry weight and root dry weight of two soybean cultivars. The most effective Bacillus spp. isolates could be used as potential inoculants for improving soybean productivity.

Screening of Antagonistic Bacterium to Control Konjac Soft Rot

2013 ◽  
Vol 726-731 ◽  
pp. 4427-4430
Author(s):  
Guo Hua Chen
Keyword(s):  
Bacterial Strain ◽  
Bacterial Pathogen ◽  
Erwinia Carotovora ◽  
Soft Rot ◽  
Field Trials ◽  
Antagonistic Effect ◽  
Soil Samples ◽  
Plate Method ◽  
Antagonistic Bacterium

Konjac soft rot is a bottleneck limiting konjac yield caused by bacterial strain of Erwinia carotovora var. carotovora. In order to control konjac soft rot, soil samples were collected, and each sample was spread on surface of a plate seeded with E. carotovora var. carotovora in advance. Strains expressing antagonistic activities were selected and then isolated with streak plate method. One bacterial strain (named Z10) was obtained from soil by this method. In field trials, strain Z10 still showed antagonistic effect against the bacterial pathogen.

scholarly journals Bacillus-based biological control of cotton seedling disease complex

2014 ◽  
Vol 54 (4) ◽  
pp. 340-348
Author(s):  
Mohammad Ahmed Khiyami ◽  
Moawad Ragab Omar ◽  
Kamel Ahmed Abd-Elsalam ◽  
Aly Abd El-Hady Aly
Keyword(s):  
Dry Weight ◽  
Damping Off ◽  
Single Strain ◽  
Seedling Disease ◽  
Cotton Seedling ◽  
Disease Complex ◽  
Fungal Isolates ◽  
Greenhouse Evaluation ◽  
Bacillus Spp ◽  
Bacillus Strains

Abstract To formulate an efficient and eco-friendly strategy for the management of cotton seedling disease complex, pot experiments were conducted and the efficiency of eight Bacillus strains against seven fungi involved in the disease were determined. A greenhouse evaluation of the interaction between fungal isolates and Bacillus strains was carried out. The evaluation revealed a very highly significant Bacillus strains x fungal isolates interaction for all the following parameters: preemergence damping-off, postemergence damping-off, survival, plant height, and dry weight. This interaction implies that a single strain of the Bacillus sp. can be highly effective against a fungal isolate, but may have only minimal effects on other fungal isolates. The results of the present study demonstrated that Bacillus circulans and B. coagulans were the most effective strains in controlling cotton seedling disease. Therefore, strains of Bacillus spp. should be tested against as many fungal isolates as possible. The testing will improve the chance of identifying Bacillus strains effective against several fungal isolates.

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