Algae最新文献 - Book学术

Antiviral effect of fucoxanthin obtained from Sargassum siliquastrum (Fucales, Phaeophyceae) against severe acute respiratory syndrome coronavirus 2 从马尾藻（鱼腥草科）中提取的岩藻黄素对严重急性呼吸系统综合征冠状病毒 2 的抗病毒作用

IF 3.2 3区生物学

Algae Pub Date : 2023-12-15 DOI: 10.4490/algae.2023.38.11.29

Nalae Kang, Seong-Yeong Heo, Eun-A Kim, Seon-Heui Cha, Bomi Ryu, Soo-Jin Heo

{"title":"Antiviral effect of fucoxanthin obtained from Sargassum siliquastrum (Fucales, Phaeophyceae) against severe acute respiratory syndrome coronavirus 2","authors":"Nalae Kang, Seong-Yeong Heo, Eun-A Kim, Seon-Heui Cha, Bomi Ryu, Soo-Jin Heo","doi":"10.4490/algae.2023.38.11.29","DOIUrl":"https://doi.org/10.4490/algae.2023.38.11.29","url":null,"abstract":"Human coronavirus diseases, particularly severe acute respiratory syndrome coronavirus 2, still remain a persistent public health issue, and many recent studies are focusing on the quest for new leads against coronaviruses. To contribute to this growing pool of knowledge and explore the available marine natural products against coronaviruses, this study investigated the antiviral effects of fucoxanthin isolated from Sargassum siliquastrum—a brown alga found on Jeju Island, South Korea. The antiviral effects of fucoxanthin were confirmed in severe acute respiratory syndrome coronavirus 2-infected Vero cells, and its structural characteristics were verified in silico using molecular docking and molecular dynamic simulations and in vitro colorimetric method. Fucoxanthin inhibited the infection in a concentration-dependent manner, without showing cytotoxicity. Molecular docking simulations revealed that fucoxanthin binds to the angiotensinconverting enzyme 2-spike protein (binding energy -318.306 kcal mol-1) and main protease (binding energy -205.118 kcal mol-1). Moreover, molecular dynamic simulations showed that fucoxanthin remains docked to angiotensin-converting enzyme 2-spike protein for 20 ns, whereas it breaks away from main protease after 3 ns. Also, the in silico prediction of the fucoxanthin was verified through the in vitro colorimetric method by inhibiting the binding between angiotensinconverting enzyme 2 and spike protein in a concentration-dependent manner. These results indicate that fucoxanthin exhibits antiviral effects against severe acute respiratory syndrome coronavirus 2 by blocking the entry of the virus. Therefore, fucoxanthin from S. siliquastrum can be a potential candidate for treating coronavirus infection.","PeriodicalId":7628,"journal":{"name":"Algae","volume":"27 3","pages":""},"PeriodicalIF":3.2,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138999186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Protists in hypoxic waters of Jinhae Bay and Masan Bay, Korea, based on metabarcoding analyses: emphasizing surviving dinoflagellates 基于代谢编码分析的韩国镇海湾和马山湾缺氧水域中的原生动物：强调幸存的甲藻

IF 3.2 3区生物学

Algae Pub Date : 2023-12-15 DOI: 10.4490/algae.2023.38.12.6

Jin Hee Ok, Hae Jin Jeong, Hee Chang Kang, Ji Hyun You, Sang Ah Park, Se Hee Eom, Jin Kyeong Kang, Y. Yoo

{"title":"Protists in hypoxic waters of Jinhae Bay and Masan Bay, Korea, based on metabarcoding analyses: emphasizing surviving dinoflagellates","authors":"Jin Hee Ok, Hae Jin Jeong, Hee Chang Kang, Ji Hyun You, Sang Ah Park, Se Hee Eom, Jin Kyeong Kang, Y. Yoo","doi":"10.4490/algae.2023.38.12.6","DOIUrl":"https://doi.org/10.4490/algae.2023.38.12.6","url":null,"abstract":"Hypoxia can indeed impact the survival of protists, which play a crucial role in marine ecosystems. To better understand the protistan community structure and species that can thrive in hypoxic waters, we collected samples from both the surface and bottom waters during the hypoxic period in Jinhae and Masan Bays and the non-hypoxic period in Jinhae Bay. Subsequently, we utilized metabarcoding techniques to identify the protistan species. During hypoxia, with dissolved oxygen concentrations of 0.8 mg L-1 in Jinhae Bay and 1.8 mg L-1 in Masan Bay within the bottom waters, the phylum Dinoflagellata exhibited the highest amplicon sequence variants richness among the identified protist phyla. Following the Dinoflagellata, Ochrophyta and Ciliophora also displayed notable presence. In hypoxic waters of Jinhae and Masan Bays, we identified a total of 36 dinoflagellate species that exhibited various trophic modes. These included one autotrophic species, 14 mixotrophic species, 9 phototrophic species with undetermined trophic modes (either autotrophic or mixotrophic), 2 kleptoplastidic species, and 10 heterotrophic species. Furthermore, the hypoxic bottom water exhibited a greater number of heterotrophic dinoflagellate species compared to the non-hypoxic surface water within the same water column or the non-hypoxic bottom water. Therefore, feeding by mixotrophic and heterotrophic dinoflagellates may be partially responsible for their dominance in terms of the number of species surviving in hypoxic waters. This study not only introduces the initial documentation of 26 dinoflagellate species surviving in hypoxic conditions but also establishes a foundation for a more comprehensive understanding of the ecophysiology of dinoflagellates in hypoxic marine environments.","PeriodicalId":7628,"journal":{"name":"Algae","volume":"24 26","pages":""},"PeriodicalIF":3.2,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139000814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Morphology and phylogenetic relationships of two Antarctic strains within the genera Carolibrandtia and Chlorella (Chlorellaceae, Trebouxiophyceae) 小球藻属（Chlorellaceae，Trebouxiophyceae）中两个南极菌株的形态和系统发育关系

IF 3.2 3区生物学

Algae Pub Date : 2023-12-15 DOI: 10.4490/algae.2023.38.11.30

Hyunsik Chae, Eun Jae Kim, Han Soon Kim, Han-Gu Choi, Sanghee Kim, Ji Hee Kim

{"title":"Morphology and phylogenetic relationships of two Antarctic strains within the genera Carolibrandtia and Chlorella (Chlorellaceae, Trebouxiophyceae)","authors":"Hyunsik Chae, Eun Jae Kim, Han Soon Kim, Han-Gu Choi, Sanghee Kim, Ji Hee Kim","doi":"10.4490/algae.2023.38.11.30","DOIUrl":"https://doi.org/10.4490/algae.2023.38.11.30","url":null,"abstract":"The genera Carolibrandtia and Chlorella have been described as small green algae with spherical cell shapes that inhabit various environments. Species of these genera are often difficult to identify because of their simple morphology and high phenotypic plasticity. We investigated two small coccoid strains from Antarctica based on morphology, molecular phylogeny by two alignment methods which have been applied to previous phylogenetic studies of the genus Chlorella, and comparison of the secondary structures of nuclear small subunit (SSU) and internal transcribed spacer (ITS) rDNA sequences. Light microscopy of two strains revealed spherical cells containing chloroplasts with pyrenoids, and the morphological characteristics of the strains were nearly identical to those of other Chlorella species. However, based on the phylogenetic analyses of nuclear SSU and ITS rDNA sequences, it was determined that the Antarctic microalgal strains belonged to two genera, as the Chlorella and Carolibrandtia. In addition, the secondary structures of the SSU and ITS2 sequences were analyzed to detect compensatory base changes (CBCs) that were used to identify and describe the two strains. A unique CBC in the SSU rDNA gene was decisive for distinguishing strain CCAP 211/45. The ITS2 rDNA sequences for each strain were compared to those obtained previously from other closely related species. Following the comparison of morphological and molecular characteristics, we propose KSF0092 as a new species, Chlorella terrestris sp. nov., and the reassignment of the strain Chlorella antarctica CCAP 211/45 into Carolibrandtia antarctica comb. nov.","PeriodicalId":7628,"journal":{"name":"Algae","volume":"50 7","pages":""},"PeriodicalIF":3.2,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138999945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Novel rearrangements in the mitochondrial genomes of the Ceramiales (Rhodophyta) and evolutionary implications Ceramiales (Rhodophyta) 线粒体基因组的新重排及其对进化的影响

IF 3.2 3区生物学

Algae Pub Date : 2023-12-15 DOI: 10.4490/algae.2023.38.12.2

Min Ho Seo, Shin Chan Kang, K. Kim, Min Seok Kwak, Jihoon Jo, Han-Gu Choi, G. Boo, Hwan Su Yoon

{"title":"Novel rearrangements in the mitochondrial genomes of the Ceramiales (Rhodophyta) and evolutionary implications","authors":"Min Ho Seo, Shin Chan Kang, K. Kim, Min Seok Kwak, Jihoon Jo, Han-Gu Choi, G. Boo, Hwan Su Yoon","doi":"10.4490/algae.2023.38.12.2","DOIUrl":"https://doi.org/10.4490/algae.2023.38.12.2","url":null,"abstract":"The Ceramiales is the most diverse and species-rich group (2,669 spp.) of red algae, and it is widely distributed from tropical to polar oceans. Mitochondrial genomes (mitogenomes) and other genes have contributed to our knowledge regarding the classification and phylogeny of this diverse red algal group; however, the mitogenome architecture remains understudied. Here, we compared 42 mitogenomes, including 19 newly generated in this study, to expand our knowledge. The number of genes in mitogenome varied from 43 to 68 due to gene duplication. The mitogenome architecture was also variable, categorized into four types (A–D): type A = ancestral type with a basic composition; type B = those with inverse transpositions; type C = those with inverted duplications; and type D = those with both inversion and duplication. The palindromic and inverted repeats were consistently found in flanking regions of the rearrangement, especially near the cob and nad6 genes. The three rearranged mitogenome architectures (types B, C, D) are the first report of these in red algae. Phylogenetic analyses of 23 protein-coding genes supported the current familial classification of the Ceramiales, implying that the diversity of mitogenome architecture preceded the phylogenetic relationships. Our study suggests that palindromic and inverted repeats may drive mitogenome architectural variation.","PeriodicalId":7628,"journal":{"name":"Algae","volume":"73 3","pages":""},"PeriodicalIF":3.2,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139000590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Oomycete pathogens, red algal defense mechanisms and control measures 卵菌病原体、红藻防御机制和控制措施

IF 3.2 3区生物学

Algae Pub Date : 2023-12-15 DOI: 10.4490/algae.2023.38.12.13

Xianying Wen, G. Zuccarello, T. Klochkova, Gwang Hoon Kim

{"title":"Oomycete pathogens, red algal defense mechanisms and control measures","authors":"Xianying Wen, G. Zuccarello, T. Klochkova, Gwang Hoon Kim","doi":"10.4490/algae.2023.38.12.13","DOIUrl":"https://doi.org/10.4490/algae.2023.38.12.13","url":null,"abstract":"Oomycete pathogens are one of the most serious threats to the rapidly growing global algae aquaculture industry but research into how they spread and how algae respond to infection is unresolved, let alone a proper classification of the pathogens. Even the taxonomy of the genera Pythium and Olpidiopsis, which contain the most economically damaging pathogens in red algal aquaculture, and are among the best studied, needs urgent clarification, as existing morphological classifications and molecular evidence are often inconsistent. Recent studies have reported a number of genes involved in defense responses against oomycete pathogens in red algae, including pattern-triggered immunity and effectortriggered immunity. Accumulating evidence also suggests that calcium-mediated reactive oxygen species signaling plays an important role in the response of red algae to oomycete pathogens. Current management strategies to control oomycete pathogens in aquaculture are based on the high resistance of red algae to abiotic stress, these have environmental consequences and are not fully effective. Here, we compile a revised list of oomycete pathogens known to infect marine red algae and outline the current taxonomic situation. We also review recent research on the molecular and cellular responses of red algae to oomycete infection that has only recently begun, and outline the methods currently used to control disease in the field.","PeriodicalId":7628,"journal":{"name":"Algae","volume":"69 1","pages":""},"PeriodicalIF":3.2,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138998075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Functions and values of sulfated polysaccharides from seaweed 海藻硫酸化多糖的功能和价值

IF 3.2 3区生物学

Algae Pub Date : 2023-12-15 DOI: 10.4490/algae.2023.38.12.1

D. P. Nagahawatta, N. M. Liyanage, T. Jayawardena, Fengqi Yang, H. H. A. C. K. Jayawardena, M. Kurera, Fahe Wang, Xiaoting Fu, You-Jin Jeon

{"title":"Functions and values of sulfated polysaccharides from seaweed","authors":"D. P. Nagahawatta, N. M. Liyanage, T. Jayawardena, Fengqi Yang, H. H. A. C. K. Jayawardena, M. Kurera, Fahe Wang, Xiaoting Fu, You-Jin Jeon","doi":"10.4490/algae.2023.38.12.1","DOIUrl":"https://doi.org/10.4490/algae.2023.38.12.1","url":null,"abstract":"Sulfated polysaccharides (SPs) isolated from seaweed have emerged as remarkable bioactive compounds with a wide spectrum of biological activities and have substantial value in the scientific and industrial domains. The current study explores the diverse biological activities of SPs and their relationship with their structures. This aids in an in-depth examination of the multifaceted biological activities of SPs, including anticoagulant, anti-inflammatory, antiviral, antioxidant, and immunomodulatory properties, which underpin their potential health benefits. Furthermore, the current study explores the complicated properties of SPs, with their extraction methodologies and techniques for precise characterization. Elucidation of the commercial significance of SPs derived from brown, red, and green seaweed by highlighting their potential applications has emphasized their importance in human well-being. Further, this review emphasizes the challenges needed to overcome research and industrial innovations for SPs. Collaboration among researchers, industry stakeholders, and regulatory authorities can overcome these challenges and elevate the potential of SPs to revolutionize industries such as pharmaceuticals, cosmeceuticals, food, and biotechnology.","PeriodicalId":7628,"journal":{"name":"Algae","volume":"32 7","pages":""},"PeriodicalIF":3.2,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138995961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transcriptome analysis revealed regulatory mechanisms of light and culture density on free-living sporangial filaments of Neopyropia yezoensis (Rhodophyta) 转录组分析揭示了光照和培养密度对酵母新葡京娱乐平台（Rhodophyta）自由生活孢子囊丝状体的调控机制

IF 3.2 3区生物学

Algae Pub Date : 2023-12-15 DOI: 10.4490/algae.2023.38.12.12

Bangxiang He, Zhenbing Zheng, J. Niu, Xiujun Xie, Guangce Wang

{"title":"Transcriptome analysis revealed regulatory mechanisms of light and culture density on free-living sporangial filaments of Neopyropia yezoensis (Rhodophyta)","authors":"Bangxiang He, Zhenbing Zheng, J. Niu, Xiujun Xie, Guangce Wang","doi":"10.4490/algae.2023.38.12.12","DOIUrl":"https://doi.org/10.4490/algae.2023.38.12.12","url":null,"abstract":"Previous research indicated that free-living sporangial filament keep hollow morph under high-culture density and form bipartite cells under low-culture density, while the following conchospore release was inhibited by high light. Here, we further explored the molecular bases of these affects caused by light and culture density using a transcriptome analysis. Many differentially expressed genes (DEGs) related to carbon dioxide concentration and fixation, photosynthesis, chlorophyll synthesis and nitrogen absorption were upregulated under high-light conditions compared with low-light conditions, indicating the molecular basis of rapid vegetative growth under the former. The stress response- and ion transport-related DEGs, as well as the gene encoding the vacuole formation–brefeldin A-inhibited guanine nucleotide exchange protein (BIG, py05721), were highly expressed under high-density conditions, indicating the molecular basis of the hollow morph of free-living sporangial filaments under high-culture density conditions. Additionally, the brefeldin A treatment indicated that the hollow morph was directly influenced by vacuole formation-related vesicle traffic. Others DEGs related to cell wall components, zinc-finger proteins, ASPO1527, cell cycle and cytoskeleton were highly expressed in the low density with low-light group, which might be related to the formation and release of conchospores. These results provide a deeper understanding of sporangial filaments in Neopyropia yezoensis and related species.","PeriodicalId":7628,"journal":{"name":"Algae","volume":"334 11","pages":""},"PeriodicalIF":3.2,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138996648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fissipedicella orientalis gen. et sp. nov. (Ralfsiales, Phaeophyceae), a new crustose brown alga from Korea based on molecular and morphological analyses Fissipedicella orientalis gen. et sp. 11 (Ralfsiales, Phaeophyceae):一种新的朝鲜褐藻

3区生物学

Algae Pub Date : 2023-09-15 DOI: 10.4490/algae.2023.38.9.9

Antony Otinga Oteng’o, Boo Yeon Won, Tae Oh Cho

{"title":"Fissipedicella orientalis gen. et sp. nov. (Ralfsiales, Phaeophyceae), a new crustose brown alga from Korea based on molecular and morphological analyses","authors":"Antony Otinga Oteng’o, Boo Yeon Won, Tae Oh Cho","doi":"10.4490/algae.2023.38.9.9","DOIUrl":"https://doi.org/10.4490/algae.2023.38.9.9","url":null,"abstract":"The crustose brown algal family Ralfsiaceae comprises four genera: Analipus, Endoplura, Heteroralfsia, and Ralfsia. This study provides a detailed description of Fissipedicella orientalis gen. et sp. nov. based on molecular and morphological analyses. Our phylogenetic analyses from rbcL and concatenated dataset (rbcL + 5′ region of cytochrome c oxidase subunit I [COI-5P]) reveal that specimens collected in Korea are nested in a distinct new clade within Ralfsiaceae with robust bootstrap support and Bayesian posterior probabilities. The sequence divergences for rbcL and COI-5P between F. orientalis and other genera within Ralfsiaceae are 7.4–10.1 and 17.5–21.2%, respectively. Fissipedicella orientalis is characterized by crustose thalli with a hypothallial basal layer and erect perithallial filaments, tufts of hairs in pits, a single chloroplast per cell, plurangia with 1–3 sterile cells, and unangia on stalks composed of 1–6 vertically or obliquely cleaved cells. We propose that F. orientalis can be recognized as a new genus-level taxon within Ralfsiaceae, even though a single species represents it. Our new genus, Fissipedicella, is distinguished from the other members within the Ralfsiaceae by the type of thallus, the number of chloroplasts and tufts of hairs in pits, and the development of unangia.","PeriodicalId":7628,"journal":{"name":"Algae","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135485669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Isolation and cultivation of freshwater diatom Nitzschia palea HY1 for increasing biomass and fucoxanthin production 淡水硅藻nizschia palea HY1的分离和培养提高生物量和岩藻黄素产量

3区生物学

Algae Pub Date : 2023-09-15 DOI: 10.4490/algae.2023.38.9.3

Hyunji Won, Eunmi Ro, Seungbeom Seo, Baik-Ho Kim, EonSeon Jin

{"title":"Isolation and cultivation of freshwater diatom Nitzschia palea HY1 for increasing biomass and fucoxanthin production","authors":"Hyunji Won, Eunmi Ro, Seungbeom Seo, Baik-Ho Kim, EonSeon Jin","doi":"10.4490/algae.2023.38.9.3","DOIUrl":"https://doi.org/10.4490/algae.2023.38.9.3","url":null,"abstract":"Diatoms, a type of microalgae distributed worldwide, have been identified as potential sources of biomass, lipids, and high-value compounds. While marine diatoms have been extensively studied, the potential of freshwater diatoms still needs to be explored. In this study, a novel strain of freshwater diatom was isolated from the Jungnangcheon stream located in Seoul, Republic of Korea (37°33'08.0\" N, 127°02'40.0\" E). This newly isolated strain was classified through phylogenetic analysis, and its morphology was investigated using light and electron microscopy; it was named Nitzschia palea HY1. N. palea HY1 grown in freshwater media (FDM) produced higher biomass (0.68 g L<sup>-1</sup>) and fucoxanthin production (9.19 mg L<sup>-1</sup>) than in conventional diatom media. Furthermore, increasing the bicarbonate concentration from 2 to 10 mM enhanced the maximum biomass and fucoxanthin production in FDM by 2.7 fold and 1.5 fold, respectively. Remarkably, the introduction of aeration to the modified FDM (MFDM) led to a substantial increase in the maximum biomass and fucoxanthin production of N. palea HY1, exhibiting 3.8-fold and 4.1-fold enhancement, respectively, compared to FDM alone. These findings suggest that optimizing the cultivation of N. palea HY1 using MFDM could provide an alternative to marine sources for fucoxanthin production.","PeriodicalId":7628,"journal":{"name":"Algae","volume":"851 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135485670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synchronous nuclear division and the role of the cytoskeleton in the multinucleate red alga Griffithsia monilis 多核红藻同步核分裂及细胞骨架的作用

3区生物学

Algae Pub Date : 2023-09-15 DOI: 10.4490/algae.2023.38.9.6

Chan Young Hong, Ji Ho Yun, Minseok Kwak, Jong Seok Moon, Gwang Hoon Kim

{"title":"Synchronous nuclear division and the role of the cytoskeleton in the multinucleate red alga Griffithsia monilis","authors":"Chan Young Hong, Ji Ho Yun, Minseok Kwak, Jong Seok Moon, Gwang Hoon Kim","doi":"10.4490/algae.2023.38.9.6","DOIUrl":"https://doi.org/10.4490/algae.2023.38.9.6","url":null,"abstract":"Most taxonomic groups of organisms harbor temporarily or permanently multinucleate cells in all or parts of their bodies. Each nucleus in the same cytoplasm responds almost identically to environmental cues, but little is known about the signals that mediate their coordinated division. In this study, we used Griffithsia monilis, a multinucleated giant cell, to investigate how its nuclear division occurs and the role of cytoskeleton in this process. Our results show that nuclear division is exquisitely coordinated and synchronized, but that nuclear division and chloroplast division are not coupled to each other. Microtubules are known to play an important role in synchronized nuclear division in some large multinucleate green algae, and microtubule arrangement is involved in shaping the cytoplasmic domains of each nucleus. However, we found no evidence for the involvement of the cytoskeleton in the synchronized nuclear division or regular nuclear arrangement in G. monilis. Although the nuclei were arranged at very regular intervals, these intervals became irregular during nuclear division, and there was no regular arrangement of actin or microtubules to maintain the spacing between the nuclei. Neither cortical microtubules nor spindle microtubules were physically connected to other neighboring nuclei during nuclear division, suggesting that microtubules are not involved in the coordination of nuclear division in G. monilis.","PeriodicalId":7628,"journal":{"name":"Algae","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135485672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0