SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "LAR1:gu ;mspu:(researchreview);pers:(Spetea Cornelia 1968)"

Sökning: LAR1:gu > Forskningsöversikt > Spetea Cornelia 1968

  • Resultat 1-10 av 10
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  • Cheregi, Otilia, et al. (författare)
  • Microalgae biotechnology in Nordic countries - the potential of local strains.
  • 2019
  • Ingår i: Physiologia plantarum. - : Wiley. - 1399-3054 .- 0031-9317. ; 166:1, s. 438-450
  • Forskningsöversikt (refereegranskat)abstract
    • Climate change, energy use and food security are the main challenges that our society is facing nowadays. Biofuels and feedstock from microalgae can be part of the solution if high and continuous production is to be ensured. This could be attained in year-round, low cost, outdoor cultivation systems using strains that are not only champion producers of desired compounds but also have robust growth in a dynamic climate. Using microalgae strains adapted to the local conditions may be advantageous particularly in Nordic countries. Here, we review the current status of laboratory and outdoor-scale cultivation in Nordic conditions of local strains for biofuel, high-value compounds and water remediation. Strains suitable for biotechnological purposes were identified from the large and diverse pool represented by saline (NE Atlantic Ocean), brackish (Baltic Sea) and fresh water (lakes and rivers) sources. Energy-efficient annual rotation for cultivation of strains well adapted to Nordic climate has the potential to provide high biomass yields for biotechnological purposes.
  •  
2.
  • Khosravitabar, Fatemeh, et al. (författare)
  • Evaluating technical parameters for microalgae immobilization to optimize green hydrogen photoproduction: A comparative review
  • 2024
  • Ingår i: International journal of hydrogen energy. - 0360-3199.
  • Forskningsöversikt (refereegranskat)abstract
    • Microalgae are photosynthetic microorganisms that have been extensively studied for their ability to produce biofuels, including hydrogen (H2). While microalgae immobilization techniques have been extensively researched for wastewater treatment, their application for H2 photoproduction is a relatively new area of study. In this review, we evaluate microalgae immobilization as a promising technology to improve the commercial maturity of green H2 production by microalgae, as it offers multiple advantages over traditional suspended growth systems. It facilitates cell harvesting, reduces contamination risk, and improves control of cultivation conditions, biomass retention, and efficiency of H2 production. However, the effectiveness of immobilization largely depends on the technical parameters, including the type of immobilization method used, the choice of immobilization materials, and the operational conditions. Here we provide a comparative review on different parameters and conditions suggested in the literature for microalgae immobilization, and propose a protocol optimized to achieve an efficient H2 production.
  •  
3.
  • Marchand, Justine, et al. (författare)
  • Ion and metabolite transport in the chloroplast of algae: lessons from land plants.
  • 2018
  • Ingår i: Cellular and molecular life sciences : CMLS. - : Springer Science and Business Media LLC. - 1420-9071 .- 1420-682X. ; 75:12, s. 2153-2176
  • Forskningsöversikt (refereegranskat)abstract
    • Chloroplasts are endosymbiotic organelles and play crucial roles in energy supply and metabolism of eukaryotic photosynthetic organisms (algae and land plants). They harbor channels and transporters in the envelope and thylakoid membranes, mediating the exchange of ions and metabolites with the cytosol and the chloroplast stroma and between the different chloroplast subcompartments. In secondarily evolved algae, three or four envelope membranes surround the chloroplast, making more complex the exchange of ions and metabolites. Despite the importance of transport proteins for the optimal functioning of the chloroplast in algae, and that many land plant homologues have been predicted, experimental evidence and molecular characterization are missing in most cases. Here, we provide an overview of the current knowledge about ion and metabolite transport in the chloroplast from algae. The main aspects reviewed are localization and activity of the transport proteins from algae and/or of homologues from other organisms including land plants. Most chloroplast transporters were identified in the green alga Chlamydomonas reinhardtii, reside in the envelope and participate in carbon acquisition and metabolism. Only a few identified algal transporters are located in the thylakoid membrane and play role in ion transport. The presence of genes for putative transporters in green algae, red algae, diatoms, glaucophytes and cryptophytes is discussed, and roles in the chloroplast are suggested. A deep knowledge in this field is required because algae represent a potential source of biomass and valuable metabolites for industry, medicine and agriculture.
  •  
4.
  • Spetea, Cornelia, 1968, et al. (författare)
  • An update on the regulation of photosynthesis by thylakoid ion channels and transporters in Arabidopsis.
  • 2017
  • Ingår i: Physiologia plantarum. - : Wiley. - 1399-3054 .- 0031-9317. ; 161:1
  • Forskningsöversikt (refereegranskat)abstract
    • In natural variable environments, plants rapidly adjust photosynthesis for optimal balance between light absorption and utilization. There is increasing evidence suggesting that ion fluxes across the chloroplast thylakoid membrane play an important role in this regulation, by affecting the proton motive force, and consequently photosynthesis and thylakoid membrane ultrastructure. This minireview presents an update on the thylakoid ion channels and transporters characterized in Arabidopsis thaliana as being involved in these processes, as well as an outlook at the evolutionary conservation of their functions in other photosynthetic organisms. This is a contribution to shed light on the thylakoid network of ion fluxes and how they help plants to adjust photosynthesis in variable light environments.
  •  
5.
  • Spetea, Cornelia, 1968, et al. (författare)
  • Changing the light environment: chloroplast signalling and response mechanisms
  • 2014
  • Ingår i: Philosophical Transactions of the Royal Society of London. Biological Sciences. - : The Royal Society. - 0962-8436 .- 1471-2970. ; 369:1640
  • Forskningsöversikt (refereegranskat)abstract
    • Light is an essential environmental factor required for photosynthesis, but it also mediates signals to control plant development and growth and induces stress tolerance. The photosynthetic organelle (chloroplast) is a key component in the signalling and response network in plants. This theme issue of Philosophical Transactions of the Royal Society of London B: Biology provides updates, highlights and summaries of the most recent findings on chloroplast-initiated signalling cascades and responses to environmental changes, including light and biotic stress. Besides plant molecular cell biology and physiology, the theme issue includes aspects from the cross-disciplinary fields of environmental adaptation, ecology and agronomy.
  •  
6.
  • Spetea, Cornelia, 1968, et al. (författare)
  • Evidence for nucleotide-dependent processes in the thylakoid lumen of plant chloroplasts - an update.
  • 2012
  • Ingår i: FEBS Letters. - : Wiley. - 0014-5793. ; 586:18
  • Forskningsöversikt (refereegranskat)abstract
    • The thylakoid lumen is an aqueous chloroplast compartment enclosed by the thylakoid membrane network. Bioinformatic and proteomic studies indicated the existence of 80–90 thylakoid lumenal proteins in Arabidopsis thaliana, having photosynthetic, non-photosynthetic or unclassified functions. None of the identified lumenal proteins had canonical nucleotide-binding motifs. It was therefore suggested that, in contrast to the chloroplast stroma harboring nucleotide-dependent enzymes and other proteins, the thylakoid lumen is a nucleotide-free compartment. Based on recent findings, we provide here an updated view about the presence of nucleotides in the thylakoid lumen of plant chloroplasts, and their role in function and dynamics of photosynthetic complexes.
  •  
7.
  • Spetea, Cornelia, 1968, et al. (författare)
  • Phylogenetic analysis of the thylakoid ATP/ADP carrier reveals new insights into its function restricted to green plants
  • 2012
  • Ingår i: Frontiers in Plant Science. - : Frontiers Media SA. - 1664-462X. ; 2, s. 1-11 (article 110)
  • Forskningsöversikt (refereegranskat)abstract
    • ATP is the common energy currency of cellular metabolism in all living organisms. Most of them synthesize ATP in the cytosol or on the mitochondrial inner membrane, whereas land plants, algae, and cyanobacteria also produce it on the thylakoid membrane during the light-dependent reactions of photosynthesis. From the site of synthesis, ATP is transported to the site of utilization via intracellular membrane transporters. One major type of ATP transporters is represented by the mitochondrial ADP/ATP carrier family. Here we review a recently characterized member, namely the thylakoid ATP/ADP carrier from Arabidopsis thaliana (AtTAAC). Thus far, no orthologs of this carrier have been characterized in other organisms, although similar sequences can be recognized in many sequenced genomes. Protein Sequence database searches and phylogenetic analyses indicate the absence of TAAC in cyanobacteria and its appearance early in the evolution of photosynthetic eukaryotes. The TAAC clade is composed of carriers found in land plants and some green algae, but no proteins from other photosynthetic taxa, such as red algae, brown algae, and diatoms. This implies that TAAC-like sequences arose only once before the divergence of green algae and land plants. Based on these findings, it is proposed that TAAC may have evolved in response to the need of a new activity in higher photosynthetic eukaryotes. This activity may provide the energy to drive reactions during biogenesis and turnover of photosynthetic complexes, which are heterogeneously distributed in a thylakoid membrane system composed of appressed and non-appressed regions.
  •  
8.
  • Spetea, Cornelia, 1968 (författare)
  • Role of Chloroplast Thylakoid Lumen in Photosynthetic Regulation and Plant Cell Signaling
  • 2012
  • Ingår i: Progress in Botany. - Berlin, Heidelberg : Springer Berlin Heidelberg. - 0340-4773. ; 73:Part 3, s. 207-230
  • Forskningsöversikt (refereegranskat)abstract
    • The aqueous lumen enclosed by the thylakoid membrane network of the chloroplast is the compartment where molecular oxygen is produced from water during photosynthetic light-dependent reactions. The thylakoid lumen has been thought for a long time to contain mainly plastocyanin and oxygen-evolvingcomplex-associated proteins, playing important roles during these reactions. In the last decade, the functional characterization of thylakoid lumenal proteins from Arabidopsis thaliana has brought insights into the complex role of this subcellular compartment. The aim of this chapter is to provide an updated view of the protein composition of the thylakoid lumen and its emerging roles in photosynthetic regulation and plant cell signaling. Recent research has uncovered redox signaling and a new paradigm about the role of nucleotides in the thylakoid lumen.
  •  
9.
  • Szabò, Ildikò, et al. (författare)
  • Impact of the ion transportome of chloroplasts on the optimization of photosynthesis.
  • 2017
  • Ingår i: Journal of experimental botany. - : Oxford University Press (OUP). - 1460-2431 .- 0022-0957. ; 68:12
  • Forskningsöversikt (refereegranskat)abstract
    • Ions play fundamental roles in all living cells, and their gradients are often essential to fuel transport, regulate enzyme activities, and transduce energy within cells. Regulation of their homeostasis is essential for cell metabolism. Recent results indicate that modulation of ion fluxes might also represent a useful strategy to regulate one of the most important physiological processes taking place in chloroplasts, photosynthesis. Photosynthesis is highly regulated, due to its unique role as a cellular engine for growth in the light. Controlling the balance between ATP and NADPH synthesis is a critical task, and availability of these molecules can limit the overall photosynthetic yield. Photosynthetic organisms optimize photosynthesis in low light, where excitation energy limits CO2 fixation, and minimize photo-oxidative damage in high light by dissipating excess photons. Despite extensive studies of these phenomena, the mechanism governing light utilization in plants is still poorly understood. In this review, we provide an update of the recently identified chloroplast-located ion channels and transporters whose function impacts photosynthetic efficiency in plants.
  •  
10.
  • Villanova, Valeria, et al. (författare)
  • Mixotrophy in diatoms: Molecular mechanism and industrial potential.
  • 2021
  • Ingår i: Physiologia plantarum. - : Wiley. - 1399-3054 .- 0031-9317. ; 173:2, s. 603-611
  • Forskningsöversikt (refereegranskat)abstract
    • Diatoms are microalgae well known for their high variability and high primary productivity, being responsible for about 20% of the annual global carbon fixation. Moreover, they are interesting as potential feedstocks for the production of biofuels and high-value lipids and carotenoids. Diatoms exhibit trophic flexibility and, under certain conditions, they can grow mixotrophically by combing photosynthesis and respiration. So far, only a few species of diatoms have been tested for their mixotrophic metabolism; in some cases, they produced more biomass and with higher lipid content when grown under this condition. Phaeodactylum tricornutum is the most studied diatom species for its mixotrophic metabolism due to available genome sequence and molecular tools. However, studies in additional species are needed to better understand the conservation of this process in diatoms and its potential in industrial applications. Here, we describe the photosynthetic and respiratory pathways involved in mixotrophy and provide an overview of the trophic variability in diatoms. This review also highlights promising areas of industrial applications for diatoms when cultivated under mixotrophy.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 1-10 av 10

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy