A5023808247- Microbial Community Ecology and Physiology
- Photosynthetic Processes and Mechanisms
- Polyamine Metabolism and Applications
- Amino Acid Enzymes and Metabolism
- Enzyme Structure and Function
- Plant Water Relations and Carbon Dynamics
- Analytical Chemistry and Sensors
- Ecology and Vegetation Dynamics Studies
- Medical Image Segmentation Techniques
- Algal biology and biofuel production
- Electrochemical Analysis and Applications
- Marine and coastal ecosystems
- Biocrusts and Microbial Ecology
- Generative Adversarial Networks and Image Synthesis
- Advanced Chemical Sensor Technologies
- Hemoglobin structure and function
- Protist diversity and phylogeny
- Geochemistry and Geologic Mapping
- GABA and Rice Research
- Image and Signal Denoising Methods
- Tree-ring climate responses
Instituto de Bioquímica Vegetal y Fotosíntesis
2014-2019
Universidad de Sevilla
2014-2019
Institut Català de Ciències del Clima
2019
Institut de Ciències del Mar
2019
Consejo Superior de Investigaciones Científicas
2014
Centre for Research on Ecology and Forestry Applications
2009-2010
Universitat Autònoma de Barcelona
2009-2010
Significance The heterocyst-forming cyanobacteria represent a true multicellular system found in the bacterial world that adds unique features to biodiversity. They grow as chains of cells containing two metabolically interdependent cellular types, vegetative fix carbon dioxide performing oxygenic photosynthesis and dinitrogen-fixing heterocysts. Heterocysts accumulate cell inclusion, cyanophycin [multi-L-arginyl-poly (L-aspartic acid)], nitrogen reservoir. We have second enzyme catabolism,...
ABSTRACT Filamentous, heterocyst-forming cyanobacteria exchange nutrients and regulators between cells for diazotrophic growth. Two alternative modes of have been discussed involving transport either through the periplasm or septal junctions linking adjacent cells. Septal channels in peptidoglycan are likely filled with junction complexes. While possible proteinaceous factors involved formation, SepJ (FraG), FraC, FraD, identified, little is known about channel formation complex anchoring to...
ABSTRACT Heterocyst-forming cyanobacteria grow as chains of cells (known trichomes or filaments) that can be hundreds long. The filament consists individual surrounded by a cytoplasmic membrane and peptidoglycan layers. cells, however, share continuous outer membrane, septal proteins, such SepJ, are important for cell-cell contact formation. Here, we addressed possible role cell envelope components in filamentation, the process producing maintaining filaments, model cyanobacterium Anabaena...
Polyamines are primordial, small organic polycations present in almost all cells, but their roles bacteria poorly understood. sym-Homospermidine is the dominant polyamine filamentous, N2 -fixing, heterocyst-forming cyanobacterium Anabaena sp. PCC 7120. Synthesis of homospermidine was dependent on speA (encoding arginine decarboxylase), speB (agmatinase) and speY (deoxyhypusine synthase homologue), which an unprecedented pathway. Inactivation any these genes impaired diazotrophic growth....
Because of their limited length, xylem conduits need to connect each other maintain water transport from roots leaves. Conduit spatial distribution in a cross section plays an important role aiding this connectivity. While indices conduit already exist, they are not well defined statistically. •We used point pattern analysis derive new indices. One hundred and five cross-sectional images different species were transformed into binary images. The resulting patterns, based on the locations...
Summary Arginine participates widely in metabolic processes. The heterocyst‐forming cyanobacterium Anabaena catabolizes arginine to produce proline and glutamate, with concomitant release of ammonium, as major products. Analysis mutant strains showed that this catabolic pathway is the product two genes, agrE ( alr4995 ) putA alr0540 ). predicted PutA protein a conventional, bifunctional oxidase produces glutamate from proline. In contrast, AgrE hitherto unrecognized enzyme contains both an...
Biomass has been studied as biomarker to evaluate the effect of heavy metals on microbial communities. Nevertheless, most important methodological problem when working with natural and artificial mats is difficulty changes produced microorganism populations that are found in thicknesses just a few mm depth.Here, we applied for first time recently published new method based confocal laser scanning microscopy image-program analysis determine situ Pb Cu stress cyanobacterial populations.The...
Arginine decarboxylase produces agmatine, and arginase agmatinase are ureohydrolases that catalyze the production of ornithine putrescine from arginine respectively, releasing urea. In genome filamentous, heterocyst-forming cyanobacterium Anabaena sp. strain PCC 7120, ORF alr2310 putatively encodes an ureohydrolase. Cells supplemented with [(14) C]arginine took up catabolized this amino acid generating a set labeled acids included ornithine, proline, glutamate. deletion mutant, agmatine spot...