Article
Biotechnology & Applied Microbiology
Megumu Takahashi, Koji Mikami
Summary: Phycobilisomes in cyanobacteria, red algae and glaucophyte algae can absorb various light wavelengths to optimize photosynthesis. Research on the red alga Pyropia yezoensis showed that changes in light wavelength, specifically blue and red light, can modify the composition of phycobilisomes, resulting in reversible color changes in the algae. This blue-red chromatic acclimation in Pyropia yezoensis provides new insights into regulatory mechanisms for adjusting photosynthetic pigment contents in phycobilisomes of photosynthetic organisms.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2021)
Article
Plant Sciences
Xinzi Yu, Lei Tang, Xianghai Tang, Yunxiang Mao
Summary: This study conducted a comprehensive analysis of the MYB gene family in Pyropia yezoensis, a type of red algae. The research identified several MYB gene members in Py. yezoensis and investigated their structural features and expression profiles. The study provides valuable insights into the functional divergence of MYB genes.
Article
Biochemistry & Molecular Biology
Hae-Bin Park, So-Jung Kim, Dhananjay Yadav, Eun-Koung An, Wei Zhang, Hee-Yun Eom, Minseok Kwak, Tatsuya Oda, Peter Chang-Whan Lee, Jun-O Jin
Summary: This study found that porphyran derived from Pyropia yezoensis has an inhibitory effect on dextran sodium sulfate (DSS)-induced colitis in mice. Oral or intraperitoneal administration of porphyran can inhibit the progression of colitis and prevent immune cell infiltration in the colon. Porphyran inhibits T cell activation by suppressing dendritic cells and macrophages and attenuates chronic colitis caused by long-term DSS administration.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Applied
Lihua Geng, Quanbin Zhang, Qishan Suo, Jing Wang, Yingxia Wang, Cong Wang, Ning Wu
Summary: The oligo-porphyran OP145, isolated from Pyropia yezoensis, shows potential in inhibiting SARS-CoV-2. Through experiments and simulations, it is found that OP145 can bind to Spike glycoprotein and prevent viral infection.
CARBOHYDRATE POLYMERS
(2023)
Article
Biotechnology & Applied Microbiology
Jihae Park, Hojun Lee, Soyeon Choi, Lalit K. Pandey, Stephen Depuydt, Jonas De Saeger, Joon-Tae Park, Taejun Han
Summary: This study investigated the depigmentation and anti-ageing properties of red seaweed extracts for skin care. The results showed that the extracts did not have cytotoxic effects and had inhibitory effects on melanogenesis and tyrosinase activity, as well as promoting collagen production.
JOURNAL OF APPLIED PHYCOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Yingchao Ma, Bangxiang He, Xulei Wang, Linwen He, Jianfeng Niu, Li Huan, Xiaoping Lu, Xiujun Xie, Guangce Wang
Summary: This study analyzed the proteome changes in the mutant strain E and initial strain NA of Pyropia yezoensis, showing that the mutant strain E had enhanced proteins related to photosynthesis, protein biosynthesis, and glycolysis, promoting its growth. It also exhibited increased stress resistance, while proteins related to methylation were decreased in mutant strain E. This research provides a theoretical foundation for molecular breeding of Py. yezoensis.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2021)
Article
Fisheries
Xiaoqing Wang, Jing Liu, Lihua Geng, Yue Yang, Ning Wu, Quanbin Zhang, Jing Wang
Summary: This study evaluated the supplemental effect of Pyropia yezoensis enzymatic hydrolysate (PYE) in fish diet using zebrafish as a model. The results showed that adding 1% PYE to the diet significantly improved the growth performance of zebrafish and increased the crude protein content of their bodies. Moreover, PYE supplementation enhanced the innate immune responses and activity of digestive enzymes in zebrafish, as well as regulating the intestinal flora. These findings suggest that PYE could potentially be used as an aquatic additive.
FISH & SHELLFISH IMMUNOLOGY
(2022)
Article
Agriculture, Multidisciplinary
Dan He, Qifang Wu, Chenying Lu, Jinlan Wu, Peichao Chen, Mingjiang Wu, Jong-Il Choi, Haibin Tong
Summary: The study found that PYP can improve metabolic abnormalities caused by high sucrose by modulating gut microbiota. PYP reduced the relative abundance of bacteria causing metabolic abnormalities and increased the relative abundance of beneficial bacteria. However, PYP had no effect on triglyceride and circulating sugar contents in larvae fed with high sucrose after gut microbiota removal by antibiotics.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2022)
Article
Chemistry, Medicinal
Dan He, Liping Yan, Yingxia Hu, Qifang Wu, Mingjiang Wu, Jong-il Choi, Haibin Tong
Summary: Macroalgae polysaccharides, such as Pyropia yezoensis porphyran (PYP), have been optimized for extraction in this study. The extracted PPYP has lipid-lowering effects in both HepG2 cells and Drosophila melanogaster larvae, indicating its potential as a marine lipid-lowering drug.
Article
Biotechnology & Applied Microbiology
Chao-Feng Teng, Da -Hai Gao, Hong -Chang Ding, Xing -Hong Yan
Summary: In this study, the regulation of reactive oxygen species (ROS) on the processes of formation, release, and germination of archeospores of Pyropia yezoensis was investigated using in situ ROS fluorescence detection. The results showed that ROS fluorescence was observed in the marginal cells during the release of archeospores, and intensive ROS fluorescence was present in the released archeospores. Once adhered to a glass substrate, the ROS fluorescence faded and round cell shape and cell wall formation occurred. ROS fluorescence disappeared during the first germination and division, and no ROS fluorescence was observed in germlings with two or more cells. Culturing somatic cells from the blades revealed that ROS fluorescence could be detected from single cells to cell-masses, with higher intensity in cell-masses with more cells. Addition of diphenyleneiodonium (DPI), which inhibits ROS production, affected cell division and reduced ROS fluorescent intensity. These results demonstrate the regulatory roles of ROS in the formation, release, and early germination of archeospores of Pyropia yezoensis.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2023)
Article
Biotechnology & Applied Microbiology
Dachun Yu, Jiao Yin, Yehua Wang, Aiming Lu, Yuan He, Songdong Shen
Summary: Nitrate promotes the growth and photosynthetic pigment content of Pyropia yezoensis, but under sufficient nitrate conditions, the nitrogen utilization efficiency of the thalli decreases.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2022)
Article
Plant Sciences
Zehao Zhang, Huijuan Qian, Zhongshi Wang, Ying Pang, Xiaowei Guan, Ansgar Poetsch, Dongmei Wang
Summary: Histone acetylation is an important epigenetic mechanism that plays a role in the regulation of various genes controlling growth, development, and response to environmental stresses in eukaryotes. However, the association of histone acetylation with dehydration stress and the genes involved in histone acetylation and deacetylation in red algae remain largely unknown. In this study, in silico analysis identified several histone acetyltransferase (HAT) and histone deacetylase (HDAC) genes in the red seaweed Pyropia yezoensis. The expression of these genes was found to be upregulated during dehydration, suggesting their potential roles in modulating gene expression under stress conditions. Experimental inhibition of HAT and HDAC activities confirmed their involvement in dehydration adaptation. This study provides insights into the regulation and function of HAT/HDAC during stress adaptation in red algae.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Plant Sciences
Tian-Yu Gui, Da-Hai Gao, Hong-Chang Ding, Xing-Hong Yan
Summary: This study characterized the Rboh genes in Pyropia yezoensis and investigated their role in the formation of archeospores. The results showed that RBOH played an important role in archeospore formation, and the expression of PyRbohJ and PyRbohK genes correlated positively with the amount of archeospores. These findings provide insights into the molecular mechanism of archeospore formation in P. yezoensis.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Biotechnology & Applied Microbiology
Jimin Hyun, Hye-Won Yang, Jun-Geon Je, Hyo-Geun Lee, Gwang Hoon Kim, You-Jin Jeon
Summary: Increased oceanic temperature is affecting the production of Pyropia yezoensis in South Korea, leading to a decrease in its global supply. This study explores the antioxidant properties of a newly developed heat-resistant P. yezoensis and its enzymatically hydrolyzed fractions, showing potential as a nutraceutical antioxidant. The hydrolysate containing the highest protein content displayed significant protection against oxidative stress in cells and embryos.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2023)
Article
Biotechnology & Applied Microbiology
Ryuta Terada, Gregory N. Nishihara, Kaname Arimura, Yuki Watanabe, Takayuki Mine, Tarou Morikawa
Summary: The response to dehydration and recovery ability differ between different life-history stages of the red alga, with the microscopic sporophyte showing greater sensitivity to dehydration stress than the macroscopic gametophyte.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2021)
