Influence of UV-B radiation on the fitness and toxin expression of the cyanobacterium Cylindrospermopsis raciborskii
| العنوان: | Influence of UV-B radiation on the fitness and toxin expression of the cyanobacterium Cylindrospermopsis raciborskii |
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| المؤلفون: | Guadalupe Beamud, Signe Haakonsson, Claudia Piccini, Gabriela Martínez de la Escalera, Beatriz M. Brena, Macarena Pírez, Paula Vico, Sylvia Bonilla |
| المصدر: | Hydrobiologia. 763:161-172 |
| بيانات النشر: | Springer Science and Business Media LLC, 2015. |
| سنة النشر: | 2015 |
| مصطلحات موضوعية: | 0106 biological sciences, 0301 basic medicine, Cyanobacteria, Saxitoxin, Phenotypic plasticity, biology, Strain (chemistry), Toxin, 010604 marine biology & hydrobiology, Aquatic Science, biology.organism_classification, medicine.disease_cause, 01 natural sciences, Planktothrix, Microbiology, Cylindrospermopsis raciborskii, 03 medical and health sciences, chemistry.chemical_compound, 030104 developmental biology, chemistry, Microcystis, Botany, medicine |
| الوصف: | The harmful bloom-forming cyanobacterium Cylindrospermopsis raciborskii grows in freshwaters over a wide range of light conditions. This species has increased its global distribution recently. The influence of ultraviolet radiation (UVR) on the fitness and toxin production of C. raciborskii has not previously been explored. We performed short-term experiments with three C. raciborskii strains (MVCC19, LB2897, and CYP011 K), and we compared their responses with other bloom-forming species (Microcystis sp.1 and Plankthotrix agardhii) to determine the impact of UV-B radiation on pigments, biomass, and morphological traits. In addition, we analyzed the effect of UV-B on the saxitoxin content and sxtU gene expression in the strain MVCC19. C. raciborskii strains were stressed differentially by UV-B exposure as evidenced by changes in growth, morphology, and heterocytes number. A significant increase in saxitoxin concentration and sxtU gene expression under UV-B suggests that toxin production in C. raciborskii can be a response to UV-B stress. In comparison, Microcystis sp.1 was more tolerant, while P. agardhii was severely impacted by UV-B, indicating also different sensitivities among cyanobacteria to UVR. Our results underscore the influence of UVR on C. raciborskii and the differences between strains which showed phenotypic plasticity, which potentially could affect its distribution in freshwaters. |
| تدمد: | 1573-5117 0018-8158 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::5b42a8278d70103326a95ed7b63d59e1 https://doi.org/10.1007/s10750-015-2370-6 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........5b42a8278d70103326a95ed7b63d59e1 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 15735117 00188158 |
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