Biological Control of Flax Seedling Blight Disease

Ashour, A.; Afify, Aida; Kineber, M.

doi:10.21608/jpp.2004.238794

Cited by 2 publications

(2 citation statements)

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“…At the other side, cyanobacterial strain (N. favosum) was no effective or no antagonism, but the best antagonism showed with the mixture from strains (Table 1). Our data are in accordance with the reports in vitro , which reported that isolates of bacteria inhibited growth of pathogenic fungi Afify 1999 &Kaur 2014) by various compounds as antifungal. All strains of Nostoc consistently showed no antagonism in vitro between their filtrates.…”

Section: Antagonismsupporting

confidence: 93%

Using Cyanobacteria (Nostoc spp.) in the Biological Control of Damping off Disease in Cotton

Afify

Ashour

2023

Journal of Agricultural Chemistry and Biotechnology

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Cyanobacteria are one from the main classes of bacteria that promote growth of plants and in biocontrol of soil-borne fungi. In vitro and in vivo, this study investigated the effect of application Nostoc spp. filtrates (Nostoc lichenoides, Nostoc indistinguendun and Nostoc favosum) on the Fusarium oxysporum and Rhizoctonia solani that infects cotton (Gossypium barbadense L.) plant. Nostoc spp. strains were tested to antagonize both pathogenic fungi. Total phenolic compounds, polysaccharides contents and dry weight were determined of Nostoc spp. strains. In a greenhouse test in soil infested with F. oxysporum and R. solani isolates the three filtrates from cyanobacterial strains and their mixture were effective in increasing the dry weight and the surviving seedlings percentage; however, the filtrates of strains had no effect on seedling height. The strains showed that the highest efficiency to inhibit the post-damping off of F. oxysporum and R. solani when they were applied in a mixture. Under field conditions the three strains were consistently effective in increasing stand and yield of cotton plant in 2021 and 2022 growing seasons; however, their efficiency was much higher when they were applied in a mixture. Finally, from the obtained data we concluded that using biotic factors for controlling damping off of cotton plant pathogens such as F. oxysporum and R. solani were effective.

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Section: Antagonismsupporting

confidence: 93%

Using Cyanobacteria (Nostoc spp.) in the Biological Control of Damping off Disease in Cotton

Afify

Ashour

2023

Journal of Agricultural Chemistry and Biotechnology

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“…Bacillus as spore-forming bacteria were isolated from the soil by pasteurization soil suspension (15 min, 80ºC) (Ashour and Afify 1999) and the purified cultures were maintained on nutrient agar (NA) slants at 4-5ºC for used (Burcu and Bahri 2016). In vitro screening of Bacillus spp.…”

Section: Bacterial Isolatesmentioning

confidence: 99%

Antifungal Activity of Bacillus Species against Damping-off Fungi

Ashour,

Afify

2024

Journal of Agricultural Chemistry and Biotechnology

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The current paper discuss the isolation of bacterial Bacilli from the rhizosphere soil of some seedlings plants to suppress growth plant pathogenic fungi. The 15 bacterial colonies were isolated and screened for their ability to antagonize damping-off fungi, Rhizoctonia solani and Fusarium oxysporum. In vitro, among them, four isolates were the highest effect in reducing growth of both mycelia for each fungi. These bacterial isolates exhibited multiple antifungal substances for example as: hydrogen cyanide (HCN), ammonia (NH3), indole acetic acid (IAA), siderophore and hydrolytic enzymes (chitinase, cellulase, catalase). The most potent bacterial isolates based for morphological, biochemical and molecular characterizations. Four potent bacterial strains sporeforming were isolated on nutrient agar (NA) medium and identified as Bacillus subtilis, Bacillus sp., Bacillus sp. and Bacillus amyloliquefaciens, respectively. All strains were Gram-positive long rods, motile, spore forming bacteria. Strains B. subtilis-1 and B. amyloliquefaciens-14 were produced white pigment. Moreover, inhibition zone in vitro with strains B. subtilis -1 and B. amyloliquefaciens-14 higher than with strains B.sp.-4 and B.sp.-12. There were correlation between the Bacillus spp. strains against R. solani and F.oxysporum and its results of antifungal substances production. Finally, Bacillus spp. isolates have antagonistic activity for R. solani and F.oxysporum also, potenial to be used as a biocontrol agent. It is suggested that antifungal substances secreted by Bacillus spp. isolates should be involved in the suppression of the phytopathogenic fungal growth.

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Biological Control of Flax Seedling Blight Disease

Cited by 2 publications

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Using Cyanobacteria (Nostoc spp.) in the Biological Control of Damping off Disease in Cotton

Using Cyanobacteria (Nostoc spp.) in the Biological Control of Damping off Disease in Cotton

Antifungal Activity of Bacillus Species against Damping-off Fungi

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