MARCELO P. HERNANDO^1,2, IRENE R. SCHLOSS^3,4,5,*, FLORENCIA DE LA ROSA^6,7, MARLEEN DE TROCH⁸

BIOCELL, Vol.46, No.3, pp. 607-621, 2022, DOI:10.32604/biocell.2022.017309 - 18 November 2021

Abstract Under the present changing climate conditions and the observed temperature increase, it is of high importance to understand its effects on aquatic microbial life, and organisms’ adaptations at the biochemical level. To adjust to temperature or salinity stress and avoid cell damage, organisms alter their degree of fatty acids (FAs) saturation. Thus, temperature is expected to have strong effects on both the quantity and quality of FAs in aquatic microorganisms. Here we review some recent findings about FAs sensitivity to climate change in contrasting environments. Overall, heat waves may induce changes in the relative abundance… More >

JIA-FONG HONG¹, BAGHDAD OUDDANE², JIANG-SHIOU HWANG^3,4,5, HANS-UWE DAHMS^1,6,7,*

BIOCELL, Vol.45, No.1, pp. 65-77, 2021, DOI:10.32604/biocell.2021.014154 - 26 January 2021

Abstract Harmful algal blooms (HABs) that are formed by cyanobacteria have become a serious issue worldwide in recent years. Cyanobacteria can release a type of secondary metabolites called cyanotoxins into aquatic systems which may indirectly or directly provide health risks to the environment and humans. Cyanotoxins provide some of the most powerful natural poisons including potent neurotoxins, hepatotoxins, cytotoxins, and endotoxins that may result in environmental health risks, and long-term morbidity and mortality to animals and humans. In this research, we used the chemcomputational tool Molinspiration for molecular property predictions, Pred-hERG 4.2 web software for cardiac… More >

Mohammed Fadhil HADDAD^1,2,3, Tugba DAYIOGLU^1,2, Barbaros NALBANTOĞLU², Turgay CAKMAK^1,*

BIOCELL, Vol.43, No.4, pp. 327-333, 2019, DOI:10.32604/biocell.2019.08522

Abstract Cyanobacteria are considered as a sustainable feedstock for the production of biochemically active compounds such as phycobiliproteins (PBPs). In this study, the impact of nitrogen (N) and phosphorus (P) availability on PBP production of “N-free acclimated” Anabaena variabilis IMU8 was analyzed. Upon isolation and identification, the cyanobacterium has been maintained in N-free BG-11 medium for more than 20 months. For experimentation, the strain was incubated in N-replete, N-depleted, N-P-depleted BG-11 medium. Long-term diazotrophic cultivation of A. variabilis IMU8 resulted in elevated PBP productivity with a limited impact on growth. When compared to N-depleted ones, N supply stimulated More >

Marcelo HERNANDO¹, Christian HOUGHTON¹, Leda GIANNUZZI², Bernd KROCK³, Darío ANDRINOLO², Gabriela MALANGA^4,*

BIOCELL, Vol.40, No.1, pp. 23-26, 2016, DOI:10.32604/biocell.2016.40.023

Abstract Cyanobacteria are phototrophic organisms with great ecological and economical importance. Species of the genus Microcystis are known for their potential ability to synthesize toxins, notably microcystins. There is a growing interest in the evaluation of oxidative stress in relation to the impact of global climate change on natural ecosystems in different trophic levels. Several studies have focused on the analysis of organismal responses to mitigate the damage by controlling the generation of reactive oxygen species. Variations in environmental factors caused by climate change generate a situation of oxidative damage in Microcystis aeruginosa as a direct or indirect… More >

ISRAEL A. VEGA^*1,2, FEDERICO A. DELLAGNOLA¹, JORGE A. HURST³, MARTÍN S. GODOY¹ AND ALFREDO CASTRO-VAZQUEZ^1,2

BIOCELL, Vol.36, No.2, pp. 47-55, 2012, DOI:10.32604/biocell.2012.36.047

Abstract Pigments present in the brown-greenish C morph of an intracellular endosymbiont of Pomacea canaliculata were investigated. Acetone extracts of the endosymbiotic corpuscles showed an absorption spectrum similar to that of chlorophylls. Three fractions obtained from silica gel column chromatography of the acetone extracts (C_I , C_II and C_III ), were studied by positive ion fast atom bombardment-mass spectrometry (FAB–MS) and hydrogen-nuclear magnetic resonance (H-NMR). Results indicated the presence of (1) a sterol in the yellow colored C_I fraction; (2) a mixture of pheophorbides a and b in the major green fraction, C_II; and (3) a modified pheophorbide a in the More >