Article
Biotechnology & Applied Microbiology
Wenjia Gu, John M. Kavanagh, Dale D. McClure
Summary: A kinetic model for EPA-producing microalga Phaeodactylum tricornutum was developed and successfully validated, demonstrating its potential for large-scale EPA production.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Plant Sciences
Yi Cui, Skye R. Thomas-Hall, Elvis T. Chua, Peer M. Schenk
Summary: This study successfully achieved efficient large-scale cultivation of Phaeodactylum tricornutum by establishing a new culture medium and adjusting conditions such as nitrogen source and salinity levels.
JOURNAL OF PHYCOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Konstantin Frick, Yen-Cheng Yeh, Ulrike Schmid-Staiger, Guenter E. M. Tovar
Summary: In this study, the production of chrysolaminarin by using Phaeodactylum tricornutum in artificially illuminated scalable flat panel airlift photobioreactors was investigated. Among the three P. tricornutum strains tested, SAG 1090-1b showed the highest biomass productivity and chrysolaminarin content, making it the most suitable candidate for chrysolaminarin production in a two-stage process. Co-production of chrysolaminarin, eicosapentaenoic acid, and fucoxanthin is possible, but trade-offs between the compounds were observed during nitrogen depletion.
JOURNAL OF APPLIED PHYCOLOGY
(2022)
Article
Chemistry, Medicinal
Lena Stiefvatter, Konstantin Frick, Katja Lehnert, Walter Vetter, Alexander Montoya-Arroyo, Jan Frank, Ulrike Schmid-Staiger, Stephan C. Bischoff
Summary: Dietary supplements that promote healthy aging are necessary in an aging society. A randomized controlled trial showed that microalgae rich in eicosapentaenoic acid, carotenoids, vitamins, and beta-glucans have anti-inflammatory and potentially anti-oxidative effects, which may have positive effects on healthy elderly individuals.
Article
Engineering, Marine
Haowen Wang, Qingling Su, Yanmin Zhuang, Chengzong Wu, Shanying Tong, Bo Guan, Yancui Zhao, Hongjin Qiao
Summary: Iron is a key factor in controlling the biomass of ocean phytoplankton and the lipid production of microalgae. Understanding the effects of different iron valences on microalgae is important for their commercial production.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Biodiversity Conservation
Ting Hong, Nan Huang, Jiezhang Mo, Yuanhao Chen, Tangcheng Li, Hong Du
Summary: Diatoms are ecologically important phytoplankton that contribute significantly to marine primary production and biogeochemical cycles. This study investigated the transcriptomic and physiological responses of the diatom P. tricornutum to ocean warming, revealing significant changes in cell growth, photosynthesis, and energy metabolism.
ECOLOGICAL INDICATORS
(2023)
Article
Environmental Sciences
Zengyuan Wang, Xiaojie Sun, Shaoguo Ru, Jun Wang, Jiuqiang Xiong, Liqiang Yang, Liping Hao, Jie Zhang, Xiaona Zhang
Summary: The study revealed that triazine herbicides have synergistic toxicity on Phaeodactylum tricornutum, leading to reduced biomass, decreased levels of key cellular components, and impaired photosynthesis and fatty acid synthesis.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Biotechnology & Applied Microbiology
Arunjyothi Jawaji, Dina Zilberg, Inna Khozin-Goldberg
Summary: Residual material from commercial production of the marine diatom Phaeodactylum tricornutum was used to develop a cost-effective treatment against monogenean infection, specifically Gyrodactylus turnbulli affecting ornamental fish guppies (Poecilia reticulata). The most effective treatment was obtained through direct transesterification of the residue, inducing high parasite mortality in situ and in vivo. The total fatty acid content of the treatment was comparable to that of the original residue.
JOURNAL OF APPLIED PHYCOLOGY
(2023)
Article
Fisheries
Miaoping Dong, Yi Zhang, Qiuyan Yu, Qing Liu, Xiaojian Zhou, Cuili Jin
Summary: This study found that light quality has a significant impact on the growth and accumulation of bio-components in Phaeodactylum tricornutum, and different light qualities can be used to regulate the quality of algal products.
AQUACULTURE INTERNATIONAL
(2023)
Article
Biotechnology & Applied Microbiology
Xiao Jiang, Baohua Zhu, Changchao Tu, Yun Li, Yan Zhao, Guanpin Yang, Kehou Pan
Summary: Silencing of the 1,3-beta-glucan synthase gene (Ptbgs) in Phaeodactylum tricornutum resulted in significantly lower chrysolaminarin content and increased total lipid content. This study demonstrates that Ptbgs mainly affects carbon flow distribution, leading to changes in fatty acid composition and increased production of polyunsaturated fatty acids.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2022)
Article
Chemistry, Medicinal
Kaidian Zhang, Jiashun Li, Jie Cheng, Senjie Lin
Summary: This study investigates the effects of PhoD-type alkaline phosphatase (AP) mutation on lipid composition and metabolic regulation in the diatom Phaeodactylum tricornutum. The mutation leads to modified lipid composition, increased production of fatty acids, lysophosphatidylcholine, lysophosphatidylethanolamine, ceramide, phosphatidylinositol bisphosphate, and monogalactosylmonoacylglycerol, and upregulation of genes involved in fatty acid biosynthesis. The mutant also exhibits increased content of omega-3 long-chain polyunsaturated fatty acid (LC-PUFA)-bound phospholipids, suggesting that AP mutation could improve the bioavailability of LC-PUFAs.
Article
Plant Sciences
Xiahui Hao, Wenchao Chen, Alberto Amato, Juliette Jouhet, Eric Marechal, Daniel Moog, Hanhua Hu, Hu Jin, Lingjie You, Fenghong Huang, Mark Moosburner, Andrew E. Allen, Yangmin Gong
Summary: This study utilized multiplexed CRISPR/Cas9 to generate gene knockout mutants with large fragment deletion, revealing the functions of LACS isozymes ptACSL3 and ptACSL5 in the oleaginous microalgae Phaeodactylum tricornutum and their impact on lipid synthesis.
Article
Microbiology
Hirono Suzuki, Alexandre Detain, Youngjin Park, Kiron Viswanath, Rene H. Wijffels, Nathalie Leborgne-Castel, Lenka Prochazkova, Chris J. Hulatt
Summary: Snow algae blooms in melting snowfields are poorly understood in terms of their biology, biogeography, and species diversity. This study investigated eight isolates from red snow in northern Norway using morphology and genetic markers. Six isolates were assigned to known species, while two isolates were potentially new species. Further experiments revealed differences in growth rate and fatty acid profiles among strains, as well as the accumulation of lipids under physiological stress. This study provides new insights into the biodiversity and biogeography of snow algae, as well as their physiological traits and ecological properties.
FEMS MICROBIOLOGY ECOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Mari Carmen Ruiz-Dominguez, Constanza Toledo, Daniel Ordenes, Carlos Vilchez, Paula Ardiles, Jenifer Palma, Pedro Cerezal
Summary: The study compared the effects of different direct transesterification methods on the omega-3/6 composition of extracts from Phaeodactylum tricornutum, finding that alkali-catalyst method improves the extraction efficiency of PUFA. Additionally, the relative content of fatty acids is influenced by pre-extracted lipids, and direct transesterification methods help to more accurately assess the application value of biomass in the food industry.
ACTA CHIMICA SLOVENICA
(2021)
Article
Food Science & Technology
Florina-Dorina Covaciu, Camelia Berghian-Grosan, Ariana Raluca Hategan, Dana Alina Magdas, Adriana Dehelean, Gabriela Cristea
Summary: This study aims to find a rapid and reliable method for identifying similarities and differences among food items from a fatty acid profile perspective. By using a GC-FID method and machine learning algorithms, a recognition model with high accuracy was developed to differentiate different product types.
Article
Nutrition & Dietetics
Aslaug Drotningsvik, Age Oterhals, Svein Are Mjos, Linn Anja Vikoren, Ola Flesland, Oddrun Anita Gudbrandsen
Summary: The study found that diets containing blue whiting protein can attenuate the increase in blood pressure in obese rats prone to hypertension and renal failure, possibly mediated through the renin-angiotensin system, without affecting markers of kidney function.
EUROPEAN JOURNAL OF NUTRITION
(2021)
Article
Microbiology
Julia E. Storesund, Anders Lanzen, Eva-Lena Nordmann, Hilde Rief Armo, Olga Maria Lage, Lise Ovreas
Article
Microbiology
Lucilla Giulietti, Egil Karlsbakk, Paolo Cipriani, Salome Daniel Shayo, Julia E. Storesund, Arne Levsen
Article
Optics
N. Prabavathy, R. Balasundaraprabhu, Arne S. Kristoffersen, G. Balaji, S. Prasanna, K. Sivakumaran, M. D. Kannan, Svein R. Erga, Dhayalan Velauthapillai
Summary: The study demonstrates the use of a co-sensitizer to prevent photodegradation of anthocyanins caused by photocatalytic activity, with an optimized co-sensitizer ratio maximizing the efficacy of astaxanthin. This leads to an improvement in the efficiency of dye-sensitized solar cells.
Correction
Microbiology
Julia E. Storesund, Lise Ovreas
Summary: The paper has been corrected and the revision can be found at the provided link.
ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY
(2021)
Article
Microbiology
Julia E. Storesund, Didrik H. Grevskott, Nachiket P. Marathe, Bjorn Tore Lunestad, Cecilie Smith Svanevik
Summary: Hafnia spp. possess the potential to cause opportunistic infections in humans and animals. This study presents the draft genome sequence of an H2S-positive Hafnia paralvei strain isolated as a presumptive Salmonella sp. from a frozen cod fillet.
MICROBIOLOGY RESOURCE ANNOUNCEMENTS
(2021)
Article
Fisheries
Julia E. Storesund, Caroline da Silva Nylund, Egil Karlsbakk, Lucilla Giulietti, Miguel Bao, Paolo Cipriani, Arne Levsen
JOURNAL OF FISH DISEASES
(2022)
Article
Parasitology
Lucilla Giulietti, Heidi Johansen Nedberg, Egil Karlsbakk, Nachiket P. Marathe, Julia E. Storesund, Stig Maehle, Ingrid Uglenes Fiksdal, Dawit Berhe Ghebretnsae, Arne Levsen
Summary: This study examined the distribution of K. thyrsites in various organs of NEA mackerel and found that the parasite has the highest density in the musculature. The study also revealed a weak positive correlation between the parasite density in the muscle and the extent of myoliquefaction. Histological examinations showed an association between the dispersion of free myxospores and the level of muscle myoliquefaction.
PARASITOLOGY RESEARCH
(2022)
Article
Microbiology
Stefan Thiele, Julia E. Storesund, Mar Fernandez-Mendez, Philipp Assmy, Lise Ovreas
Summary: The Arctic is warming at a rate 2-3 times faster than the global average, leading to changes in Arctic sea ice and impacting ice-associated ecosystems. Sea-ice algal blooms play a crucial role in driving the succession of bacterial and archaeal communities in Arctic sea ice.
Article
Parasitology
Arne Levsen, Paolo Cipriani, Marialetizia Palomba, Lucilla Giulietti, Julia E. Storesund, Miguel Bao
Summary: This study aimed to investigate the presence and distribution of parasitic nematodes in Northeast Arctic cod, saithe, and haddock. The most prevalent and abundant species found was Anisakis simplex (s.s.), with high infection levels in the viscera and flesh of cod and saithe. Contracaecum osculatum (s.l.) larvae showed moderate-to-high prevalence in saithe, haddock, and cod, while Pseudoterranova spp. larvae occurred at low-to-moderate prevalence and abundance in the viscera and flesh of cod and saithe. Body length of the fish species was found to be the most important factor influencing overall abundance of anisakid larvae. The spatial distribution of Anisakis larvae showed higher abundance in the belly flaps compared to the dorsal fillet parts. Removing the belly flaps significantly reduced larval presence in the fillets of these fish species.
Article
Multidisciplinary Sciences
Miguel Bao, Kaja M. Olsen, Arne Levsen, Paolo Cipriani, Lucilla Giulietti, Julia E. Storesund, Eva Garcia-Seoane, Egil Karlsbakk
Summary: This study describes for the first time the larvae of the parasite Pseudoterranova found in meso/bathypelagic fishes near Macaronesia. The larvae were identified as Pseudoterranova ceticola, which infects kogiid whales. The study also found morphological and genetic differences between Pseudoterranova from cetaceans and those from pinnipeds.
SCIENTIFIC REPORTS
(2022)
Article
Environmental Sciences
Svein Rune Erga, Mikal Heldal, Siv Prestegard, Svein Norland, Tatiana Tsagaraki, Julia E. Storesund
Summary: Comprehensive fjord-systems play a crucial role in transferring materials from land to ocean, but the effects of climate changes on the ecosystem and biogeochemical cycling remain poorly understood. This study presents novel data on spatiotemporal variations of seston multielement stoichiometry in the Sognefjord and highlights the importance of considering microbiota and environmental conditions. The findings have implications for evaluating environmental impact, pollution risk analysis, and monitoring guidelines.
Article
Chemistry, Multidisciplinary
Milan N. N. Chhaganlal, Jarl Underhaug, Svein A. A. Mjos
Summary: Four different NMR predictors were evaluated for their ability to predict 600-MHz H-1 spectra of free fatty acids and fatty acid methyl esters. The predictors were evaluated on their accuracy in directly predicting the spectra and their ability to reveal trends or predict changes. The absolute accuracy for fatty acids was good, but the predictors had outliers and failed to reproduce trends or predict minor changes in molecular structure. The reliance on data from different sources may limit the relative accuracy of the predictors.
MAGNETIC RESONANCE IN CHEMISTRY
(2023)
Article
Parasitology
Paolo Cipriani, Lucilla Giulietti, Salome Daniel Shayo, Julia E. Storesund, Miguel Bao, Marialetizia Palomba, Simonetta Mattiucci, Arne Levsen
Summary: Nematode parasites of the genus Anisakis are considered important biological hazards in seafood worldwide. This study investigated the infection sites and genetic diversity of A. typica in commercial fishes from the South-West Indian Ocean. The study found two distinct phylogenetic lineages within A. typica, suggesting the presence of two sister species. The presence of these parasites in fish muscle raises health concerns for consumers.
FOOD AND WATERBORNE PARASITOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
Sung-Yeoul Kim, Vikash Chandra Roy, Jin-Seok Park, Byung-Soo Chun
Summary: This study aims to extract functional substances from Undaria pinnatiida sporophyll using supercritical carbon dioxide (SC-CO2) and subcritical water extraction (SWE). The results showed that the consecutive green extraction method can yield extracts rich in fucoxanthin and beta-carotene, and the sporophyll of Undaria pinnatiida contains health-beneficial fatty acids. Additionally, SWE can extract substances with antioxidant, antibacterial, and antihypertensive activities.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2024)