Use of Cyanobacteria for Controlling Flax Seedling Blight

Afify, Aida; Ashour, A.

doi:10.21608/jacb.2018.36313

Cited by 6 publications

(7 citation statements)

References 10 publications

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“…Arthrospira platensis extract contains phenolics resulting in antifungal activity [ 22 ]. Anabaena , when applied to seeds, resulted in the protection of root diseases from fungal pathogens such as Fusarium [ 23 ] through different mechanisms such as phosphate solubilization and indole-3-acetic acid (IAA), ammonia, hydrogen cyanide (HCN), and enzyme production [ 24 ]. Today, the risk of fungal plant disease is one of the most urgent issues [ 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Cyanobacteria-Mediated Immune Responses in Pepper Plants against Fusarium Wilt

Abdelaziz

Attia

Salem

et al. 2022

Plants

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Research in plant pathology has increasingly focused on developing environmentally friendly, effective strategies for controlling plant diseases. Cyanobacteria, including Desmonostoc muscorum, Anabaena oryzae, and Arthrospiraplatensis, were applied to Capsicum annuum L. to induce immunity against Fusarium wilt. Soil irrigation and foliar shoots (FS) application were used in this investigation. The disease symptoms, disease index, osmotic contents, total phenol, Malondialdehyde (MDA), hydrogen peroxide (H2O2), antioxidant enzymes (activity and isozymes), endogenous hormone content, and response to stimulation of defense resistance in infected plants were assessed. Results demonstrated that using all cyanobacterial aqueous extracts significantly reduced the risk of infection with Fusarium oxysporum. One of the most effective ways to combat the disease was through foliar spraying with Arthrospira platensis, Desmonostoc muscorum, and Anabaena oryzae (which provided 95, 90, and 69% protection percent, respectively). All metabolic resistance indices increased significantly following the application of the cyanobacterial aqueous extracts. Growth, metabolic characteristics, and phenols increased due to the application of cyanobacteria. Polyphenol oxidase (PPO) and peroxidase (POD) expressions improved in response to cyanobacteria application. Furthermore, treatment by cyanobacteria enhanced salicylic acid (SA) and Indole-3-Acetic Acid (IAA) in the infected plants while decreasing Abscisic acid (ABA). The infected pepper plant recovered from Fusarium wilt because cyanobacterial extract contained many biologically active compounds. The application of cyanobacteria through foliar spraying seems to be an effective approach to relieve the toxic influences of F. oxysporum on infected pepper plants as green and alternative therapeutic nutrients of chemical fungicides.

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Section: Introductionmentioning

confidence: 99%

Cyanobacteria-Mediated Immune Responses in Pepper Plants against Fusarium Wilt

Abdelaziz

Attia

Salem

et al. 2022

Plants

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“…Additionally, previous studies reported that the chitinase enzyme produced by Volvox carteri appeared to play a defensive role in protecting the plants from pathogenic fungi [78,79]. Moreover, cyanobacterial strains effectively protected flax from infection by soil-borne fungi due to chitinase and catalase enzymes [80]. Cyanobacteria can synthesize and release enzymes that directly attack the cell walls of pathogens.…”

Section: Discussionmentioning

confidence: 98%

Biochemical Analyses of Ten Cyanobacterial and Microalgal Strains Isolated from Egyptian Habitats, and Screening for Their Potential against Some Selected Phytopathogenic Fungal Strains

et al. 2022

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Microalgae and cyanobacteria are rich sources of numerous phytochemical compounds with intrinsic antifungal potential. This research aimed to screen the phytochemical compounds and contents, as well as the antioxidant profiles, in eight cyanobacterial and two microalgal strains isolated from soil and brackish water habitats in Egypt. Our study also evaluated their antifungal activities against three phytopathogenic fungi—namely, Pythium ultimum, Fusarium solani, and Botryodiplodia theobromae, which are known to cause severe plant loss. The biochemical compounds were obtained from the cyanobacterial and algal methanolic extracts, and were identified through comparative phytochemical analyses related to the inhibition of the fungal pathogens. Comparative qualitative analyses of alkaloids, steroids, glycosides, and saponins were also carried out. The quantitative phytochemical screening of the cyanobacterial and algal strains investigated revealed the presence of xylanase, glucanase, and chitinase enzymes, along with some bioactive compounds, such as phenolics, flavonoids, proteins, neutral sugars, and carotenoids, which were species-dependent and detected in variable amounts in the extracts. The unicellular green microalgal strain Dunaliella sp. HSSASE13 displayed the highest level of antioxidant activity. However, the highest antifungal activities were shown by the heterocystous cyanobacterial strain Anabaena sp. HSSASE11 (83.94%), followed by Dunaliella sp. HSSASE13 (81.94%) and the non-heterocystous cyanobacterial strain Oscillatoria nigro-viridis HSSASE 15 (63.42%), against the three fungal pathogens B. theobromae, F. solani, and P. ultimum, respectively. Our results indicate that the highest significant and positive correlations of flavonoids (r = 0.854), phenolics (r = 0.785), DPPH scavenging activity (r = 0.876), total proteins (r = 0.808), xylanase activity (r = 0.876), glucanase activity (r = 0.746), and total neutral sugars (r = 0.764), in terms of their antifungal activities, were recorded against F. solani. Conclusively, the cyanobacterial and algal strains tested in the present study can be useful agents for the management and biocontrol of plant-infecting fungal pathogens.

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“…Bacterial strains may protect plants from phytopathogens by production some materials such as ammonia, hydrogen cyanide and catalase (Kremer andSouissi 2001 &Khan et al 2018). All of the products improved plant growth by the production growth regulators substances like IAA (Hameeda et al 2008 &Ashour 2018). Among the four strains of Bacillus spp.…”

Section: Detection Of Antagonistic Substances By Bacterial Isolatesmentioning

confidence: 99%

“…Additionally, some bacteria produce hydrolytic cellulases synergistic action by endoglucanase, exoglucanase or cellobiohydrolase and ß-glucosidase (Lynd, 2002). In addition, the bioagents materials showed that all bacterial strains produced ammonia and catalase enzyme (Afify and Ashour 2024).…”

Section: Detection Of Antagonistic Substances By 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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Use of Cyanobacteria for Controlling Flax Seedling Blight

Cited by 6 publications

References 10 publications

Cyanobacteria-Mediated Immune Responses in Pepper Plants against Fusarium Wilt

Cyanobacteria-Mediated Immune Responses in Pepper Plants against Fusarium Wilt

Biochemical Analyses of Ten Cyanobacterial and Microalgal Strains Isolated from Egyptian Habitats, and Screening for Their Potential against Some Selected Phytopathogenic Fungal Strains

Antifungal Activity of Bacillus Species against Damping-off Fungi

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