UV irradiation-promoting effect on the antibacterial activity of cyanobacterial extracts against plant pathogens: a first record
Abstract Background Cyanobacteria possess a wide array of bioactive compounds including those with antimicrobial activities. The target was to investigate the UV effect on antimicrobial activity of cyanobacterial extracts. Several cyanobacterial strains were isolated from Eastern region of KSA as we...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2020-10-01
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| Series: | Egyptian Journal of Biological Pest Control |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s41938-020-00320-2 |
| _version_ | 1818281059985391616 |
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| author | Munirah Aldayel Nermin El Semary |
| author_facet | Munirah Aldayel Nermin El Semary |
| author_sort | Munirah Aldayel |
| collection | DOAJ |
| description | Abstract Background Cyanobacteria possess a wide array of bioactive compounds including those with antimicrobial activities. The target was to investigate the UV effect on antimicrobial activity of cyanobacterial extracts. Several cyanobacterial strains were isolated from Eastern region of KSA as well as three plant pathogenic bacterial strains. Four cyanobacterial strains were used. Two strains were isolated from Al Uquair region, Arabian Gulf, and identified as Synechococcus sp. and Oscillatoria sp. The two other strains were collected from brackish stream of underground water and were characterized as Synechocystis sp. and Phormidium sp. The antimicrobial bioassay was then performed using cyanobacterial aqueous extracts. The antimicrobial effect was estimated by measuring the inhibition zone compared to that of control. The extract was divided into 2 parts: part was not exposed to UV and the other was exposed to UV-B irradiation for 10 min. The antimicrobial bioassay was performed for both parts of the extract, using plant pathogenic bacteria, namely, Erwinia sp., Pseudomonas sp., and Bacillus sp. Main body The antimicrobial profile was examined and results showed that the extracts showed non-antimicrobial effect before UV irradiation, and antimicrobial effect after UV exposure. Also, those that were active against pathogenic bacteria were more active after UV exposure. This is mostly attributed to a high optical energy of UV irradiation that subsequently had a significant impact on the electron transitions in the molecules of the extract rendering some of them more effective in their antibacterial action. Conclusion This short communication was the first report where the UV can alter the antimicrobial profile of cyanobacterial extracts. This is a novel approach in enhancing antibacterial activity. Future molecular investigations will be conducted to further characterize the isolate whose extract showed the highest response to UV treatment. |
| first_indexed | 2024-12-12T23:59:06Z |
| format | Article |
| id | doaj.art-35e0a4e05a3d4fe68b2bc76157cc48ed |
| institution | Directory Open Access Journal |
| issn | 2536-9342 |
| language | English |
| last_indexed | 2024-12-12T23:59:06Z |
| publishDate | 2020-10-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Egyptian Journal of Biological Pest Control |
| spelling | doaj.art-35e0a4e05a3d4fe68b2bc76157cc48ed2022-12-22T00:06:28ZengSpringerOpenEgyptian Journal of Biological Pest Control2536-93422020-10-013011410.1186/s41938-020-00320-2UV irradiation-promoting effect on the antibacterial activity of cyanobacterial extracts against plant pathogens: a first recordMunirah Aldayel0Nermin El Semary1Biological Sciences Department, College of Science, King Faisal UniversityBiological Sciences Department, College of Science, King Faisal UniversityAbstract Background Cyanobacteria possess a wide array of bioactive compounds including those with antimicrobial activities. The target was to investigate the UV effect on antimicrobial activity of cyanobacterial extracts. Several cyanobacterial strains were isolated from Eastern region of KSA as well as three plant pathogenic bacterial strains. Four cyanobacterial strains were used. Two strains were isolated from Al Uquair region, Arabian Gulf, and identified as Synechococcus sp. and Oscillatoria sp. The two other strains were collected from brackish stream of underground water and were characterized as Synechocystis sp. and Phormidium sp. The antimicrobial bioassay was then performed using cyanobacterial aqueous extracts. The antimicrobial effect was estimated by measuring the inhibition zone compared to that of control. The extract was divided into 2 parts: part was not exposed to UV and the other was exposed to UV-B irradiation for 10 min. The antimicrobial bioassay was performed for both parts of the extract, using plant pathogenic bacteria, namely, Erwinia sp., Pseudomonas sp., and Bacillus sp. Main body The antimicrobial profile was examined and results showed that the extracts showed non-antimicrobial effect before UV irradiation, and antimicrobial effect after UV exposure. Also, those that were active against pathogenic bacteria were more active after UV exposure. This is mostly attributed to a high optical energy of UV irradiation that subsequently had a significant impact on the electron transitions in the molecules of the extract rendering some of them more effective in their antibacterial action. Conclusion This short communication was the first report where the UV can alter the antimicrobial profile of cyanobacterial extracts. This is a novel approach in enhancing antibacterial activity. Future molecular investigations will be conducted to further characterize the isolate whose extract showed the highest response to UV treatment.http://link.springer.com/article/10.1186/s41938-020-00320-2AntimicrobialAqueous extractCyanobacteriaUV irradiation |
| spellingShingle | Munirah Aldayel Nermin El Semary UV irradiation-promoting effect on the antibacterial activity of cyanobacterial extracts against plant pathogens: a first record Egyptian Journal of Biological Pest Control Antimicrobial Aqueous extract Cyanobacteria UV irradiation |
| title | UV irradiation-promoting effect on the antibacterial activity of cyanobacterial extracts against plant pathogens: a first record |
| title_full | UV irradiation-promoting effect on the antibacterial activity of cyanobacterial extracts against plant pathogens: a first record |
| title_fullStr | UV irradiation-promoting effect on the antibacterial activity of cyanobacterial extracts against plant pathogens: a first record |
| title_full_unstemmed | UV irradiation-promoting effect on the antibacterial activity of cyanobacterial extracts against plant pathogens: a first record |
| title_short | UV irradiation-promoting effect on the antibacterial activity of cyanobacterial extracts against plant pathogens: a first record |
| title_sort | uv irradiation promoting effect on the antibacterial activity of cyanobacterial extracts against plant pathogens a first record |
| topic | Antimicrobial Aqueous extract Cyanobacteria UV irradiation |
| url | http://link.springer.com/article/10.1186/s41938-020-00320-2 |
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