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
Selvakumari Ulagesan, Taek-Jeong Nam, Youn-Hee Choi
Summary: In this study, phycoerythrin was extracted and purified from Pyropia yezoensis, showing significant antioxidant activity and cytotoxicity against HepG2 cells. The pigment had a typical spectrum of R-phycoerythrin and a molecular mass of 17.97 kDa, with a 100% sequence similarity with the R-phycoerythrin alpha subunit of Pyropia yezoensis.
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)
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
Plant Sciences
Narae Han, Jiwoong Wi, Sungoh Im, Ka-Min Lim, Hun-Dong Lee, Won-Joong Jeong, Geun-Joong Kim, Chan Song Kim, Eun-Jeong Park, Mi Sook Hwang, Dong-Woog Choi
Summary: An increase in seawater temperature due to global warming is expected to limit the growth of marine algae, including the commercially valuable red alga Pyropia yezoensis. Through transcriptome sequencing, a novel heat-tolerant gene PyHRG1 was identified in Pyropia yezoensis, which encodes a red algae-specific protein and plays a role in heat tolerance.
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
Biotechnology & Applied Microbiology
Harune Endo, Hiroyuki Mizuta, Toshiki Uji
Summary: This study investigated the effects of ethylene biosynthesis inhibitors on sexual reproduction in the red alga Pyropia yezoensis. Results showed that AIB, a structural analog of ACC, induced sexual reproduction in a manner similar to ACC, indicating a role for ACC independent from ethylene in the regulation of sexual reproduction in plants.
JOURNAL OF APPLIED PHYCOLOGY
(2021)
Article
Plant Sciences
Soon Jeong Lee, Sang-Rae Lee
Summary: This study developed a species-specific molecular marker for distinguishing between two red rot disease pathogens. Without sequencing, the polymerase chain reaction restriction fragment length polymorphism method was used to classify Pythium species at the species level. The developed molecular markers are effective for long-term monitoring of infection and distribution patterns in Pyropia aquaculture farms.
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
Sayaka Kominami, Hiroyuki Mizuta, Toshiki Uji
Summary: This study investigated the daily changes in gene expression of Neopyropia yezoensis, a major cultivated seaweed, during light/dark treatments. The results showed that genes associated with carbon-nitrogen assimilations, fatty acid synthesis, and starch synthesis were highly expressed in the morning, while a subset of genes related to the pentose phosphate pathway, cell cycle, and DNA replication were upregulated in the evening. Additionally, genes involved in asparagine catabolism and tricarboxylic acid cycle were highly expressed at dusk, suggesting their role in nitrogen and carbon supply during the dark. Furthermore, genes encoding cryptochrome/photolyase family and histone modification proteins were identified as potential regulators of diurnal rhythmic genes.
MARINE BIOTECHNOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
Lin-bin Huang, Ling-na Peng, Xing-hong Yan
Summary: The study revealed that intertidal red algae Pyropia haitanensis blades respond to multiple stresses by participating in various metabolic pathways, such as glyoxylate and dicarboxylate metabolism and carbon fixation in photosynthetic organisms. Correlated DEGs/DAMs of glyoxylate and dicarboxylate metabolism were significantly enriched under stressful conditions, highlighting the importance of these pathways in stress response.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2021)
Article
Clinical Neurology
Sanjiban Chakrabarty, Periyasamy Govindaraj, Bindu Parayil Sankaran, Madhu Nagappa, Shama Prasada Kabekkodu, Pradyumna Jayaram, Sandeep Mallya, Sekar Deepha, J. N. Jessiena Ponmalar, Hanumanthapura R. Arivinda, Angamuthu Kanikannan Meena, Rajan Kumar Jha, Sanjib Sinha, Narayanappa Gayathri, Arun B. Taly, Kumarasamy Thangaraj, Kapaettu Satyamoorthy
Summary: The study conducted comprehensive clinical, pathological, biochemical, and genetic analysis on 11 patients with MELAS syndrome, revealing the classical pathogenic mutation m.3243A > G and mutations in nuclear genes associated with MELAS clinical manifestations.
JOURNAL OF NEUROLOGY
(2021)
Article
Plant Sciences
Ji-Hyeok Lee, Ginne Ahn, Ju-Young Ko, Nalae Kang, Kyungsook Jung, Eui-Jeong Han, Gwang-Hoon Kim, Hee Jeong Kim, Cheol Soo Choi, You-Jin Jeon
Summary: The hepatoprotective effect of PYLP against alcohol-induced liver injury was demonstrated in mice, showing significant reduction in liver damage, increased antioxidant enzyme activity, and modulation of anti-apoptotic signaling pathway to minimize alcohol-induced tissue damage. The results suggest that PYLP, rich in polyunsaturated fatty acids, extracted from the red alga P. yezoensis, may be a potential liver protectant in the hangover industry.
Article
Parasitology
Huiying Chen, Haowei Dong, Hao Yuan, Wenqi Shan, Qiuming Zhou, Xiangyu Li, Heng Peng, Yajun Ma
Summary: The accurate identification of sandfly species is crucial due to their role in transmitting medically significant diseases. However, conventional identification methods are time consuming and require experienced staff. This study investigates the use of DNA barcodes to identify common sandfly species in China and finds that mitochondrial DNA markers are effective in distinguishing these species.