A5074352546- Algal biology and biofuel production
- Photosynthetic Processes and Mechanisms
- Cholesterol and Lipid Metabolism
- Biodiesel Production and Applications
- Monoclonal and Polyclonal Antibodies Research
- Peroxisome Proliferator-Activated Receptors
- Marine and coastal ecosystems
- Fatty Acid Research and Health
- Antioxidant Activity and Oxidative Stress
- Aquatic Ecosystems and Phytoplankton Dynamics
- Microbial Community Ecology and Physiology
- Geochemistry and Elemental Analysis
- Plant Micronutrient Interactions and Effects
- Enzyme Catalysis and Immobilization
- Aquaculture Nutrition and Growth
- Plant Stress Responses and Tolerance
- Metabolomics and Mass Spectrometry Studies
- Protein purification and stability
- Blood groups and transfusion
- Genomics and Phylogenetic Studies
- Plant responses to elevated CO2
- RNA regulation and disease
- Biocrusts and Microbial Ecology
- Advanced Biosensing Techniques and Applications
- Microbial Metabolic Engineering and Bioproduction
Instituto de Bioquímica Vegetal y Fotosíntesis
2004-2025
Universidad de Sevilla
2012-2025
Consejo Superior de Investigaciones Científicas
2010-2024
Centro de Investigaciones Científicas Isla de la Cartuja
2004-2022
Universidad de Granada
1984-1992
Universidad Autónoma de Madrid
1987-1991
Hôpital Saint-Louis
1984-1985
Inserm
1984-1985
The effect of boron on heterocystous and nonheterocystous dinitrogen fixing Cyanobacteria was examined. absence in culture media inhibited growth nitrogenase activity Nodularia sp., Chlorogloeopsis Nostoc sp. cultures. Examinations boron-deficient cultures showed changes heterocyst morphology. However, Cyanobacteria, Gloeothece Plectonema grown the did not show any alteration or activity. These results suggest a requirement only by Cyanobacteria. A possible role for this element early...
The effects of boron deficiency on the ultrastructure and envelope composition heterocysts in filamentous cyanobacterium Anabaena PCC 7119 were studied. Microscopic examination boron-deficient cultures showed changes heterocyst morphology. When these cells isolated their glycolipid content determined, this specific component laminated layer was found to be lacking. evidence presented supports view that plays an essential role structure function envelope.
The characterization of the molecular mechanisms, such as high light irradiance resistance, that allowed plant terrestralization is a cornerstone in evolutionary studies since conquest land by plants played pivotal role life evolution on Earth. Viridiplantae or green lineage divided into two clades, Chlorophyta and Streptophyta, turn splits Embryophyta Charophyta. Charophyta are used they generally accepted extant algal species most closely related to current plants. In this study, we have...
Abstract Earth's tilted rotation and translation around the Sun produce pervasive rhythms on our planet, giving rise to photoperiodic changes in diel cycles. Although marine phytoplankton plays a key role ecosystems, multiomics analysis of its responses these periodic environmental signals remains largely unexplored. The picoalga Ostreococcus tauri was chosen as model organism due cellular genomic simplicity. subjected different light regimes investigate signals: long summer days, short...
Cells of Anabaena PCC 7119 and a mutant strain Nostoc muscorum unable to fix dinitrogen, grown at pH 8 under low CO(2) tension (air), showed reduced capacity for photosynthesis when cultured in the absence sodium, this inhibition being followed by symptoms photooxidation, such as chlorosis, oxygen consumption light, decrease superoxide dismutase activity. The impairment preceded that nitrogenase activity, indicating requirement sodium was independent its effects on nitrogen metabolism....
The effect of boron on nitrogenase activity has been studied. When cells were dependent N2 fixation, the lack inhibited activity. However, under anaerobic conditions or in presence Na-dithionite this was not observed. Nitrogenase synthesis affected by deficiency. Similarly, heterocyst number altered. Examination boron-deficient cultures showed, however, some dramatic changes morphology. increased those enzymes related to maintaining low intracellular level toxic oxygen species (superoxide...
This study evaluates the comprehensive valorization of byproducts derived from two-phase olive oil elaboration process [i.e., washing water (OWW), (OOWW), and mill solid waste (OMSW)] in a closed-loop process. Initially, microalga Raphidocelis subcapitata was grown using mixture OWW OOWW as culture medium, allowing phosphate, nitrate, sugars, soluble chemical oxygen demand removal. In second step, microalgal biomass waters used co-substrate together with OMSW for an anaerobic co-digestion...
Nitrogenase activity of Anabaena PCC 7119 is inhibited under conditions boron deficiency. To elucidate the mechanisms this inhibition, study examined how deficiency affected photosynthesis, photosynthetic pigments, enzymes oxidative pentose phosphate pathway, and respiration cultures. After 24 to 48 hours deficiency, reductions in O(2) evolution CO(2) fixation were observed. At same time, activities pathway increased significantly with No change was observed these processes when assays...
Rotifers, used in aquaculture as feed for early larval stages, are poor carotenoids compared with copepods, the natural most common prey item of marine fish larvae. A minimal sufficient level larvae may be essential a correct development. The freshwater microalga Muriellopsis sp. has been identified potential source carotenoid lutein possible application aquaculture. Lutein is potent antioxidant, potentially beneficial effects This study describes enrichment rotifer Brachionus when incubated...
Cytoplasmic membranes prepared from nitrate‐grown Anacystis nidulans cells exhibit a Mg 2+ ‐dependent protein kinase activity able to phosphorylate in vitro plasma membrane polypeptides with molecular masses of 98, 93, 83, 47, 44 and 31 kDa. The was inhibited cytoplasmic preparations which had been exposed ammonium for 5 min. Parallely, exposure also resulted more than two‐fold activation an alkaline phosphatase present the soluble fraction. These results are discussed relation well‐known...