Aboal Sanjurjo, Marina

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Aboal Sanjurjo, Marina

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Aboal Sanjurjo, Marina

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Universidad de Murcia. Departamento de Biología Vegetal

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Open Access
The green microalga Coelastrella thermophila var. globulina (Scenedesmaceae, Chlorophyta) isolated from an Algerian hot spring as a potential source of fatty acids
(MDPI, 2022-04-08) Senoussi, Mohammed Mourad; González Silvera, Daniel; Boutarfa, Soumia; López Jiménez, José Ángel; Aboal Sanjurjo, Marina; Fisiología; Facultades de la UMU::Facultad de Biología
Screening microalgae from extreme environments, including hot springs, is an important research topic that has lately emerged. A thermophilic green alga was isolated from a north-eastern Algerian hot spring at a temperature of 63 °C, and its fatty acid (FA) profile was explored. The strain was cultivated in BBM medium at 35 °C in a 16:8 h light/dark cycle and 75 μM photons m−2 s−1. The morphological studies combined with phylogenetic analysis revealed that the isolate was Coelastrella thermophila var. globulina Q. Wang, H. Song, X. Liu, G. Liu and Z. Hu. The monounsaturated fatty acid (MUFA) content was 51.12%. The saturated fatty acid (SFA) and polyunsaturated fatty acid (PUFA) content, respectively, accounted for 27.01% and 21.87%. The main FA was oleic acid (18:1n–9), whose value was 35.95%, followed in decreasing order by palmitic acid (16:0) with 21.45%, linoleic acid (18:2n–6) with 14.38% and α-linolenic acid (18:3n–3) with 04.22%. The FA profile exhibited high total n–6 and n–3 PUFA values (15.80% and 5.76%, respectively). Coelastrella thermophila var. globulina is particularly interesting for producing n-6 and n-3 PUFA and is likely suitable for other biotechnological purposes. This is the first time that this taxon has been reported in hot springs. Other species can be expected to be reported, which emphasises the importance of the biodiversity of extreme habitats.
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Effects of living cyanobacteria, cyanobacterial extracts and pure microcystins on growth and ultrastructure of microalgae and bacteria
(Elsevier, 2006-12-02) Aboal Sanjurjo, Marina; Valdor Alonso, Rut; Bioquímica y Biología Molecular B e Inmunología
In this study, we demonstrate the inhibitory effect of both cyanobacterial extracts and pure microcystins on the growth of microalgae and bacteria. This inhibitory effect was more persistent in pure microcystins than in the extracts, which lost their properties eight days after exposure. In addition, the effects on bacteria were longerlasting than those on microalgae. The microalgae exposed to both extracts and cultures of microcystin producing species showed morphological and ultrastructural alterations, even in cases where there was no clear effect on growth. The implications for colonisation and benthic communities structure and development are discussed in the context of biomonitoring.
Open Access
Aportación al conocimiento de las algas del SE de España. 1. Caráceas (Characeae)
(Universidad de Murcia, Servicio de Publicaciones, 1985) Aboal Sanjurjo, Marina; Facultad de Biología
The checklist of Charophytes of southeastern Spain is reported. On the basis of some bibliographical referentes and a great number of personal observations, the species ecology and distribution in the zone is presented.
Open Access
Aportación al estudio algológico del sistema de sierras de Ponce y Quípar (N.O. de Murcia, S. E. de España)
(Universidad de Murcia, Servicio de Publicaciones, 1984) Llimona, Xavier; Aboal Sanjurjo, Marina; Facultad de Biología
The first data obteined in the study of the epicontinental waters of a mountain system in the central-west of Murcia are presented. 143 taxa are new records for Murcia and 19 are new for Spain.
Open Access
Algas aerofíticas epipélicas del Marjal de Pego-Oliva, este de la Península Ibérica
(2011) García Fernández, María Eugenia; Sánchez Lorencio, María Isabel; Aboal Sanjurjo, Marina; Biología Vegetal
Open Access
Hyalosynedra lanceolata sp. nov. and a extended description of Hyalosynedra (Bacillariophyta)
(Taylor & Francis, 2018) Belando, Mº Dolores; Jiménez, Juan Francisco; Marín, Arnaldo; Aboal Sanjurjo, Marina; Biología Vegetal
The araphid diatom genus Hyalosynedra is a very common component of marine benthic communities, occurring as an epiphyte or colonizing hard substrata, and has a worldwide distribution. The hyaline appearance of the valve and the high striation density, which is indiscernible under a light microscope, makes the identification of most species difficult and very few studies have investigated their morphology, phylogeny or ecology in detail. In an extensive study of diatom communities from the hypersaline Mar Menor coastal lagoon (SE Spain), several new taxa were found. Herein we propose Hyalosynedra lanceolata sp. nov. based on morphological observations (light and electron microscopy) and molecular data (phylogenetic and sequence divergence analyses). The species has distinctive morphological characters (radiate colony, biseriate striation, lanceolate sternum and two long laminar lobed chloroplasts) that are new for the genus and have been included in a proposal to extend the genus description. Our results also show that H. toxoneides does not belong to Hyalosynedra, but appears to be more closely related to Thalassionema and Thalassiothrix. However, further molecular and morphological research is needed to clarify its taxonomic position.
Open Access
Fatty acids profile of Mastigocladus laminosus Cohn ex Kichner isolated from Algerian hot springs as a biofuel feedstock
(Elsevier, 2022-05-15) Senoussi, Mohammed Mourad; González Silvera, Daniel; Boutarfa, Soumia; López Jiménez, José Ángel; Aboal Sanjurjo, Marina; Fisiología; Facultades de la UMU::Facultad de Biología
Cyanobacterial lipids are considered the feedstock of future sustainable biodiesel production, and extremophiles are usually preferred for biotechnological purposes to ease the cultivation problems. However, thermal springs have been scarcely investigated from a biotechnological perspective. Three strains of Mastigocladus laminosus Cohn ex Kichner were isolated from hot springs in Algeria, and their fatty acid profiles were studied. The content of saturated fatty acids ranged from 55.91% to 59.37%, while monounsaturated fatty acids and polyunsaturated fatty acids ranged from 38.39% to 43.54% and 0.57%–2.25%, respectively. The main fatty acid was palmitic acid (16:0), with values within the 51.41–53.16% range, followed by oleic acid (18:1n-9) with 24.47–36.60%, and minimal quantities of α-linolenic acid (18:3n-3, below 1%) and longchain fatty acids (>C18, below 0.5%). The potential biodiesel fuel properties matched the European biodiesel standards EN 14214 (European Norms) and the American standard ASTM D6751 (American Society for Testing and Materials), and were relatively better than other studied cyanobacteria and vegetable oils. The presented data show the interest of Mastigocladus and probably other thermophilic strains in different biotechnology fields, especially biofuel production.
Open Access
Cellular responses to electromagnetic fields and ultraviolet radiation: an in vitro study on microalgae and fish cell lines
(Elsevier, 2026) Ortiz García, María; Terrer Marcilla de Teruel Moctezuma, José María; García Gamuz, José Antonio; Esteban Abad, María de los Ángeles; Aboal Sanjurjo, Marina; Biología Celular e Histología; María Ángeles Esteban Abad; Facultades de la UMU::Facultad de Biología
Background The molecular effects involved in the cellular response to non-ioninzing electromagnetic radiation on marine and freshwater microalgae and fish cell lines are incompletely understood. Objectives The direct impact of non-ionizing electromagnetic radiation on marine and freshwater microalgae and fish cell lines was investigated. Methods Six microalgae species from different taxonomic groups were exposed to extremely low-frequency electromagnetic fields (ELF-EMF) for five days. Four fish cell lines (SAF-1, DLB-1, DLEC, and Fugu eye) were exposed to ultraviolet (UV) radiation, with SAF-1 demonstrating the highest sensitivity. In addition, three commercial antioxidants (2101, 3600, and 4004) were tested for their possible radioprotective effects. Results Although no statistically significant differences in cell density were observed, certain taxa (Chlorotylium sp., Mayamea sp., and Scenedesmus sp.) exhibited a declining trend compared to the controls, suggesting species-specific sensitivity to ELF-EMF. Principal component analysis revealed significant differences in physiological responses, particularly in photosynthetic variables such as electron transport rate and dissolved carbon. The total antioxidant capacity did not differ significantly between the control and exposed microalgae, and Chlorotylium sp. showed the highest basal levels. The photosystem II productivity index remained largely unaffected by ELF-EMF exposure, except for an increase in irradiated Scenedesmus sp. Low antioxidant concentrations (≤125 µg/ml) and short incubation times (6 h) of 2101 and 3600 induced proliferation or increased cell viability, particularly under irradiation. However, prolonged incubation time (24 h) or high antioxidant concentrations (≥250 µg/ml) resulted in significant cytotoxicity in all cell lines.
Open Access
Bacillariophyceae, 1. Teil. Naviculaceae. Subwasserflora von mitteleuropa 211. Kramer, K. & Lange-Bertalot, H. 1986. Gustav Fisher Verlag, Jena. 870 pp.: Reseña bibliográfica
(Murcia: Universidad de Murcia, Servicio de Publicaciones, 1987) Aboal Sanjurjo, Marina; Facultad de Biología
Open Access
Cyanobacteria and Macroinvertebrate Relationships in Freshwater Benthic Communities beyond Cytotoxicity
(MDPI, 2024-04-15) Ubero Pascal, Nicolás; Aboal Sanjurjo, Marina; Zoología y Antropología Física
Cyanobacteria are harmful algae that are monitored worldwide to prevent the effects of the toxins that they can produce. Most research efforts have focused on direct or indirect effects on human populations, with a view to gain easy accurate detection and quantification methods, mainly in planktic communities, but with increasing interest shown in benthos. However, cyanobacteria have played a fundamental role from the very beginning in both the development of our planet’s biodiversity and the construction of new habitats. These organisms have colonized almost every possible planktic or benthic environment on earth, including the most extreme ones, and display a vast number of adaptations. All this explains why they are the most important or the only phototrophs in some habitats. The negative effects of cyanotoxins on macroinvertebrates have been demonstrated, but usually under conditions that are far from natural, and on forms of exposure, toxin concentration, or composition. The cohabitation of cyanobacteria with most invertebrate groups is long-standing and has probably contributed to the development of detoxification means, which would explain the survival of some species inside cyanobacteria colonies. This review focuses on benthic cyanobacteria, their capacity to produce several types of toxins, and their relationships with benthic macroinvertebrates beyond toxicity.