Article
Plant Sciences
Tifeng Shan, Yuqian Li, Shaojun Pang
Summary: In this study, a sex-determining region was identified in the kelp Undaria pinnatifida using a genetic linkage map and resequencing data. A potential male sex-determining gene was also discovered within this region. These findings lay the foundation for understanding the sex-determining mechanism of U. pinnatifida.
JOURNAL OF PHYCOLOGY
(2023)
Article
Engineering, Marine
Loredana Stabili, Maria Immacolata Acquaviva, Ester Cecere, Carmela Gerardi, Antonella Petrocelli, Francesco Paolo Fanizzi, Federica Angile, Lucia Rizzo
Summary: The lipidic extract from Undaria pinnatifida, a highly invasive species, was found to possess antibacterial and antioxidant activity, with the highest efficacy in the blade portion. The chemical characterization revealed the presence of various fatty acids, particularly omega-3 and omega-6 polyunsaturated fatty acids, highlighting its potential in the food industry. This extract could be used as a source of therapeutic agents for fish and shellfish diseases caused by Vibrio species, as well as natural antioxidants for human health.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2023)
Article
Biotechnology & Applied Microbiology
Yoichi Sato, Hikari Nagoe, Gregory N. Nishihara, Ryuta Terada
Summary: The study investigated the effects of photosynthetically active radiation (PAR) and temperature on the photosynthesis of Undaria pinnatifida. It was found that the optimum temperature for photosynthesis was 18 degrees Celsius, and there were differences in high temperature and irradiance tolerance between mature sporophytes and juvenile sporophytes.
JOURNAL OF APPLIED PHYCOLOGY
(2021)
Article
Ecology
Shinnosuke Kaga, Shigeho Kakehi, Kimiaki Naiki, Takuya Kodama, Taku Wagawa, Satoshi Segawa, Shiho Watanabe, Tatsuya Musashi, Hiroshi Kuroda, Shin-ichi Ito
Summary: An intensive aquaculture industry in Sanriku coastal waters produces a significant amount of Japan's wakame seaweed. This study examined nutrient fluctuations and found that the Tsugaru Warm Current plays a crucial role in nutrient supply to the wakame farms.
REGIONAL STUDIES IN MARINE SCIENCE
(2022)
Article
Agricultural Engineering
J. Queffelec, N. Florez-Fernandez, H. Dominguez, M. D. Torres
Summary: Microwave hydrothermal processing was used to extract valuable components from U. pinnatifida, with different processing conditions impacting antioxidant properties and content of minerals, proteins, and oligosaccharides. The most suitable temperature for extracting alginates was found to be 160 degrees C, showing potential for non-food applications after incorporation into alginate matrices. Selected extracts exhibited promising biological activities against human cancer cell lines after an intensification stage, with high cellular inhibition percentages observed.
BIORESOURCE TECHNOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Diana Paula Quezada, Maria Lujan Flores, Osvaldo Leon Cordoba
Summary: The alga Undaria pinnatifida from Golfo San Jorge region was studied for its chemical profile and biological activity. The results showed it synthesized various bioactive metabolites, with differences according to the season. The alga exhibited potential as a source of bioactive molecules, and seasonal studies were important for determining the best collection season based on the metabolites to be studied.
JOURNAL OF APPLIED PHYCOLOGY
(2023)
Article
Food Science & Technology
Bernardo Pedro, Laura Guedes, Rebeca Andre, Helena Gaspar, Pedro Vaz, Lia Ascensao, Ricardo Melo, Maria Luisa Serralheiro
Summary: The study found that a soup prepared from this seaweed may contain bioactive compounds, such as phlorotannins and small peptides, that could promote gastrointestinal motility and reduce cholesterol biosynthesis.
JOURNAL OF FUNCTIONAL FOODS
(2021)
Article
Plant Sciences
Jose Avila-Peltroche, Boo Yeon Won, Tae Oh Cho
Summary: This study investigates the effects of different light spectra on protoplast regeneration in Undaria pinnatifida gametophytes. The results show that red, blue, and red-blue spectra have positive effects on the division and regeneration of both female and male protoplasts. The optimal light intensity for regeneration varies between female and male gametophytes.
Article
Environmental Sciences
M. Nomura, H. Okamura, Y. Horie, C. K. Yap, C. Emmanouil, S. Uwai, H. Kawai
Summary: This study aimed to develop a new phytotoxicity test using the gametophytes of Undaria pinnatifida to evaluate the effects of commonly used antifouling chemicals on seaweeds. The toxicity of Cybutryne, Diuron, Cu2+, and Zn2+ to the gametophytes was assessed by measuring the relative growth rate at the logarithmic growth phase. The test method showed high sensitivity and reproducibility, making it a valuable addition to routine toxicity evaluation of hazardous chemicals.
Article
Biochemistry & Molecular Biology
Fengzhi Qiao, Xiaoting Yu, Shanshan Tie, Yannan Chen, Shuai Hou, Mingqian Tan
Summary: Food-borne nanoparticles from Undaria pinnatifida (UPFNs) were successfully utilized as nanocarriers for zinc delivery, showing high solubility and safety with the ability to rescue zinc-deficient cells.
Article
Environmental Sciences
Yuqian Li, Tifeng Shan, Shaojun Pang
Summary: Based on historical documents, China's native Undaria pinnatifida populations in Zhejiang and Fujian provinces have declined and are now only found on small islands. This decline is likely due to anthropogenic threats. Genetic analysis revealed high diversity and shallow genetic structure among populations, indicating the potential for adaptation to future environmental changes. Further field surveys are needed to estimate population size and protect this important alga.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Food Science & Technology
Shan Jiang, Meiqi Yu, Yingzhen Wang, Wei Yin, Pengfei Jiang, Bixiang Qiu, Hang Qi
Summary: This study evaluated the effects of traditional cooking methods on the color, texture, and bioactive nutrients of Undaria pinnatifida and found that blanching and boiling were the more suitable methods.
Article
Fisheries
Xinghua Lin, Jiru Tan, Yijun Shen, Binlan Yang, Yulei Zhang, Yu Liao, Beibei Wang, Dayan Zhou, Guangli Li, Changxu Tian
Summary: In this study, a high-density genetic linkage map of Hong Kong catfish (Clarias fuscus) was generated using high-throughput sequencing. Sex-linked SNP loci and a sex-determining interval were identified, providing important tools and methodological guidance for sex control technology in breeding C. fuscus.
Article
Chemistry, Medicinal
Catarina Lourenco-Lopes, Aurora Silva, Paula Garcia-Oliveira, Anton Soria-Lopez, Javier Echave, Clara Grosso, Lucia Cassani, Maria Fatima Barroso, Jesus Simal-Gandara, Maria Fraga-Corral, Miguel A. Prieto
Summary: This study investigated the kinetic behavior of Fucoxanthin (Fx) and optimized the time, temperature, and ethanol concentration variables for the best Fx yield from Undaria pinnatifida using conventional heat extraction. The content, extraction yield, and purity of Fx were determined and the optimal conditions for each were identified. The results provide valuable information for potential applications in various industries and can help reduce energy and solvent consumption while maximizing extraction yields.
Article
Fisheries
Malene Fosse Nordvi, Signe Dille Lovmo, Ingeborg Hollekim Bringslid, Paul Whatmore, Henrik Sundh, Kjell Inge Reitan, Finn Lillelund Aachmann, Rolf Erik Olsen
Summary: Using functional feed ingredients, such as fucoidans from marine macroalgae, can enhance the intestinal health and immune regulation of Atlantic salmon (Salmo salar). In this trial, Atlantic salmon post-smolts were fed diets with different levels of fucoidan to alleviate low-level intestinal inflammation caused by a soya diet. The addition of fucoidan improved intestinal integrity and reduced inflammation in the hind intestine of the fish.