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Manipulation of ion/electron carrier genes in the model diatom enables its growth under lethal acidic stress.
iScience
August 2024
Ocean College, Zhejiang University, Zhoushan, Zhejiang 316021, China.
A major obstacle to exploiting industrial flue gas for microalgae cultivation is the unfavorable acidic environment. We previously identified three upregulated genes in the low-pH-adapted model diatom : ferredoxin (PtFDX), cation/proton antiporter (PtCPA), and HCO transporter (PtSCL4-2). Here, we individually overexpressed these genes in to investigate their respective roles in resisting acidic stress (pH 5.
View Article and Find Full Text PDFAcyl-CoA: lysophosphatidylcholine acyltransferase from diatom P. Tricornutum efficiently remodels phosphatidylcholine containing polyunsaturated fatty acids.
Sci Rep
December 2024
Intercollegiate Faculty of Biotechnology, University of Gdansk and Medical University of Gdansk, Gdansk, 80-307, Poland.
This study presents characterisation of diatom's PtLPCAT1 (acyl-CoA: lysophosphatidylcholine acyltransferase) activity in phospholipid remodelling. In this research microsomal fractions of yeast Δale1 mutant overexpressing PtLPCAT1 were used as a source of the tested enzyme. In the assays evaluating remodelling of different phospholipids by PtLPCAT1 not modified microsomal fractions of the tested yeast were used.
View Article and Find Full Text PDFCellular and genetic responses of Phaeodactylum tricornutum to seawater acidification and copper exposure.
Mar Environ Res
December 2024
Shenzhen Key Laboratory of Marine Microbiome Engineering Institute for Advanced Study, Shenzhen University, Shenzhen, China. Electronic address:
The ongoing decline in seawater pH, driven by the absorption of excess atmospheric CO, represents a major environmental issue. This reduction in pH can interact with metal pollution, resulting in complex effects on marine phytoplankton. In this study, we examined the combined impacts of seawater acidification and copper (Cu) exposure on the marine diatom Phaeodactylum tricornutum.
View Article and Find Full Text PDFIntegration of spectroscopic techniques and machine learning for optimizing Phaeodactylum tricornutum cell and fucoxanthin productivity.
Bioresour Technol
December 2024
iBET, Instituto de Biologia Experimental e Tecnológica, 2781-901 Oeiras, Portugal; Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, 2780-157, Oeiras, Portugal.
The development of sustainable and controlled microalgae bioprocesses relies on robust and rapid monitoring tools that facilitate continuous process optimization, ensuring high productivity and minimizing response times. In this work, we analyse the influence of medium formulation on the growth and productivity of axenic Phaeodactylum tricornutumcultures and use the resulting data to develop machine learning (ML) models based on spectroscopy. Our culture assays produced a comprehensive dataset of 255 observations, enabling us to train 55 (24+31) robust models that predict cells or fucoxanthin directly from either absorbance or 2D-fluorescence spectroscopy.
View Article and Find Full Text PDFBinding Strength and Transport Kinetics of Organic Dyes into Different Live Diatoms Using Second Harmonic Scattering Spectroscopy.
ACS Appl Bio Mater
December 2024
Department of Civil and Environmental Engineering, Utah State University, Logan, Utah 84322, United States.
Dye-contaminated wastewater poses serious environmental risks to ecosystems and human health. Diatoms, algae with nanoporous frustules (cell walls), offer promising potential for wastewater remediation due to their high surface area and adsorption properties. While dead diatom biomass is well-studied for biosorption, research on living diatoms' bioaccumulation and biotransformation potential is limited, with gaps in kinetic and equilibrium modeling of dye adsorption.
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