Algal Research-Biomass Biofuels and Bioproducts最新文献

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Elucidating the algicidal mechanisms and potential bioactive metabolites of Bacillus sp. WZU320 against Microcystis aeruginosa: A physiological and integrated multi-omics analysis 阐明芽孢杆菌sp. WZU320对铜绿微囊藻的杀藻机制和潜在的生物活性代谢物:生理和综合多组学分析
IF 5 2区 生物学
Algal Research-Biomass Biofuels and Bioproducts Pub Date : 2026-07-01 Epub Date: 2026-06-20 DOI: 10.1016/j.algal.2026.104796
He Zhang, Zhongliang Zhang, Wenwen Zhang, Bangyue Zhang, Qizhen Xiang, Xinyue Ren, Hailong Zou, Yao Cheng, Jun Zuo, Zeshuang Wang, Zengling Ma, Peng Xiao, Renhui Li
{"title":"Elucidating the algicidal mechanisms and potential bioactive metabolites of Bacillus sp. WZU320 against Microcystis aeruginosa: A physiological and integrated multi-omics analysis","authors":"He Zhang,&nbsp;Zhongliang Zhang,&nbsp;Wenwen Zhang,&nbsp;Bangyue Zhang,&nbsp;Qizhen Xiang,&nbsp;Xinyue Ren,&nbsp;Hailong Zou,&nbsp;Yao Cheng,&nbsp;Jun Zuo,&nbsp;Zeshuang Wang,&nbsp;Zengling Ma,&nbsp;Peng Xiao,&nbsp;Renhui Li","doi":"10.1016/j.algal.2026.104796","DOIUrl":"10.1016/j.algal.2026.104796","url":null,"abstract":"<div><div><em>M. aeruginosa</em> triggers global harmful cyanobacterial blooms (cyanoHABs), calling for eco-friend and low-cost bioremediation strategies urgently. In this study, a highly effective algicidal bacterial strain <em>Bacillus</em> sp. WZU320 (hereafter WZU320) was isolated and identified. After 3 days of co-culture, this strain removed 95.19% of lab-cultured <em>M. aeruginosa</em> and 85.98% of natural colonial <em>M. aeruginosa</em>, and lysed 88.0%–98.59% of other tested harmful cyanobacteria. Its algicidal activity was affected by multiple factors, including bacterial growth stage, inoculation ratio, light intensity and culture temperature. Additionally, the algicidal compounds exhibited excellent stability across a wide range of pH (3–11) and temperature (−80 °C to 75 °C) conditions. They could quickly damage the photosynthetic system of <em>M. aeruginosa</em>, induce severe oxidative stress and remarkably destroy cell structural integrity, and significantly downregulate key functional genes (e.g., <em>psaA</em>, <em>rbcL</em>, <em>ATP</em>, <em>sod</em>, <em>recA</em>, <em>grpE</em>). Furthermore, WZU320 treatment effectively suppressed the microcystin synthesis genes (e.g., <em>mcyA</em> and <em>mcyB</em>), and reduced toxin production and release. Inactivation of photosynthetic gene <em>psaL</em> in <em>Synechocystis</em> sp. PCC 6803 mitigated its algicidal activity, verifying the key role of photosynthetic apparatus in algicidal process with transgenic cyanobacterial strain. Untargeted metabolomics and back-validation assays identified ethylhydrocupreine and ramifenazone as potent algicidal metabolites associated with WZU320 filtrate. Overall, WZU320 is a novel broad-spectrum algicidal strain with great practical potential for cyanoHABs control.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"97 ","pages":"Article 104796"},"PeriodicalIF":5.0,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148554613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Review and research gaps in Laminaria morphological and mechanical characteristics: Considerations for aquaculture structural design and reliability 海带形态和力学特性的回顾与研究空白:水产养殖结构设计和可靠性的考虑
IF 5 2区 生物学
Algal Research-Biomass Biofuels and Bioproducts Pub Date : 2026-07-01 Epub Date: 2026-06-23 DOI: 10.1016/j.algal.2026.104809
Nazila Emamdoost, Franck Schoefs, Jean.C. Thomas, Justine Dumay, Krish Thiagarajan Sharman
{"title":"Review and research gaps in Laminaria morphological and mechanical characteristics: Considerations for aquaculture structural design and reliability","authors":"Nazila Emamdoost,&nbsp;Franck Schoefs,&nbsp;Jean.C. Thomas,&nbsp;Justine Dumay,&nbsp;Krish Thiagarajan Sharman","doi":"10.1016/j.algal.2026.104809","DOIUrl":"10.1016/j.algal.2026.104809","url":null,"abstract":"<div><div>Recent advances in marine structural design, monitoring, and inspection for aquaculture and renewable energy have increased the need to better understand biofouling and its impact on structural performance, reliability, and associated operation and maintenance costs. Biofouling is generally classified into macro and microfouling based on the length scale and geometry of the colonization. On the topic of macrofouling, there is a lack of research on soft fouling, particularly for <em>Laminaria digitata</em>, a prominent species in shallow water regions of the North Atlantic Ocean.</div><div>This paper reviews the key characteristics of seaweed as a form of soft biofouling that commonly colonizes marine structures, including morphological, physiological, growth, and biomechanical aspects, with emphasis on their influence on hydrodynamic behavior and structural loading. Environmental conditions such as light intensity, temperature, hydrodynamic loading, and seasonal variations are considered due to their impact on seaweed behavior. Existing studies are examined to assess geometrical and mechanical properties; however, variability in experimental methods and the lack of standardized procedures for sample collection, storage, specimen preparation, mechanical testing, and post-processing introduce uncertainties in reported results.</div><div>While past results can be used as benchmarks for artificial seaweed, such as kelp model validation, this study highlights the lack of studies on the characterization of <em>Laminaria digitata</em> and the uncertainties in existing mechanical testing methods. It further emphasizes the importance of optimal material selection for artificial algae modeling in offshore applications, with a focus on structural reliability and in-service performance of both fixed and floating aquaculture systems.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"97 ","pages":"Article 104809"},"PeriodicalIF":5.0,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148554861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Integrated biorefinery approaches for the valorization of drift brown seaweed Sargassum sp. biomass: A comprehensive review 海洋褐藻生物量增值的综合生物精炼方法综述
IF 5 2区 生物学
Algal Research-Biomass Biofuels and Bioproducts Pub Date : 2026-07-01 Epub Date: 2026-06-18 DOI: 10.1016/j.algal.2026.104808
Dillirani Nagarajan, Kavinilavu Rajendran, Chiu-Wen Chen, Jo-Shu Chang, Cheng-Di Dong
{"title":"Integrated biorefinery approaches for the valorization of drift brown seaweed Sargassum sp. biomass: A comprehensive review","authors":"Dillirani Nagarajan,&nbsp;Kavinilavu Rajendran,&nbsp;Chiu-Wen Chen,&nbsp;Jo-Shu Chang,&nbsp;Cheng-Di Dong","doi":"10.1016/j.algal.2026.104808","DOIUrl":"10.1016/j.algal.2026.104808","url":null,"abstract":"<div><div>Drifting brown seaweeds, particularly <em>Sargassum</em> sp., are being increasingly recognized as a potential biomass resource instead of an environmental challenge. The Great Atlantic Sargassum belt, <em>Sargassum</em> overgrowth on European coasts, and golden tides of the China seas, encompassing over 20 million tons of biomass, have created a pressing need for sustainable valorization strategies. This review critically examines the unique characteristics and biochemical composition of drift brown seaweeds, with a focus on <em>Sargassum</em> sp.. High-value product recovery, such as alginate, laminarin, and fucoidan for applications in the food, pharmaceutical, and nutraceutical industries, is emphasized. Simultaneously, pathways for bioenergy production, including bioethanol, biogas, and biodiesel, are assessed, alongside low-value applications like compost and fertilizers. An integrated biorefinery framework is proposed as a sustainable mitigation and resource recovery strategy to manage drift <em>Sargassum</em> pollution, which incorporates high-value and low-value products in a green extraction cascade. Key challenges and research gaps, including seasonal and inter-annual variability, supply chain logistics, and regulatory barriers, are identified, and future research prospects are presented. Drift seaweed biomass valorization also promotes sustainable development goals such as climate action (SDG 13), affordable and clean energy (SDG 7), and responsible consumption and production (SDG 12). By identifying knowledge gaps and summarizing current advances, this review proposes that the valorization and upcycling of drift brown seaweed can be a viable strategy for efficiently converting environmental waste into a sustainable industrial sector.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"97 ","pages":"Article 104808"},"PeriodicalIF":5.0,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148554873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Microalgae–bacteria symbiosis drives ecological selection of Sandaracinobacter linking wastewater remediation to plant growth 微藻-细菌共生驱动Sandaracinobacter的生态选择,将废水修复与植物生长联系起来
IF 5 2区 生物学
Algal Research-Biomass Biofuels and Bioproducts Pub Date : 2026-07-01 Epub Date: 2026-06-14 DOI: 10.1016/j.algal.2026.104793
Ying Tan, Yikai Chen, Xiaoqing Huang, Gongmin Yu, Yougui Peng, Dongping Li, Lianfu Tian
{"title":"Microalgae–bacteria symbiosis drives ecological selection of Sandaracinobacter linking wastewater remediation to plant growth","authors":"Ying Tan,&nbsp;Yikai Chen,&nbsp;Xiaoqing Huang,&nbsp;Gongmin Yu,&nbsp;Yougui Peng,&nbsp;Dongping Li,&nbsp;Lianfu Tian","doi":"10.1016/j.algal.2026.104793","DOIUrl":"10.1016/j.algal.2026.104793","url":null,"abstract":"<div><div>Microalgae–bacteria symbiosis (MBS) systems are increasingly recognized as efficient platforms for wastewater remediation, yet their role as ecological selection environments for functional bacteria remains poorly understood. Here, a <em>Chlorella sorokiniana</em> T003–based MBS established in swine wastewater was used to investigate microbial community restructuring and the enrichment of bacteria with potential metabolic interaction traits. Community profiling revealed a pronounced shift toward taxa associated with nutrient turnover and indole-related metabolism, particularly members of the Sphingomonadaceae.</div><div>Multiple indole-3-acetic acid (IAA)-producing bacteria were isolated from the MBS system. Among them, strain T42 was identified as a novel species, <em>Sandaracinobacter alcalinohabitum</em> sp. nov. Genomic and metabolomic analyses suggested the potential organic compound transformation, nutrient-associated metabolism, vitamin biosynthesis, and indole-derived compound production. Co-cultivation assays showed that T42 enhanced ammonium and organic carbon removal and promoted the growth of <em>C. sorokiniana</em> under wastewater conditions, suggesting metabolically complementary interactions within the MBS system.</div><div>As functional validation of its ecological traits, T42 also stimulated rice growth under hydroponic and nutrient-limited soil conditions. Together, these findings indicate that MBS systems function as ecological filters that enrich bacteria with ecologically relevant metabolic traits and highlight the phycosphere as a source of functionally relevant microorganisms with potential applications in environmental biotechnology and sustainable agriculture.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"97 ","pages":"Article 104793"},"PeriodicalIF":5.0,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148567537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Synergistic effects of Spirulina-loaded chitosan nanoparticles on the growth performance and nutritional profile of intensively cultured Red Tilapia (Oreochromis sp.) 螺旋藻负载壳聚糖纳米颗粒对集约养殖红罗非鱼生长性能和营养特性的协同效应
IF 5 2区 生物学
Algal Research-Biomass Biofuels and Bioproducts Pub Date : 2026-07-01 Epub Date: 2026-06-19 DOI: 10.1016/j.algal.2026.104802
Heba S. El-Sayed, Hussein Oraby, Khaled A. Fadel, Khouloud M. Barakat, Ghada E. Hegazy
{"title":"Synergistic effects of Spirulina-loaded chitosan nanoparticles on the growth performance and nutritional profile of intensively cultured Red Tilapia (Oreochromis sp.)","authors":"Heba S. El-Sayed,&nbsp;Hussein Oraby,&nbsp;Khaled A. Fadel,&nbsp;Khouloud M. Barakat,&nbsp;Ghada E. Hegazy","doi":"10.1016/j.algal.2026.104802","DOIUrl":"10.1016/j.algal.2026.104802","url":null,"abstract":"<div><div>This study investigated the effects of dietary chitosan nanoparticles (CsNPs) and <em>Spirulina</em>-loaded chitosan nanoparticles (SpCsNPs) on the growth performance and body composition of Red Tilapia (<em>Oreochromis</em> sp.). SpCsNPs were synthesized and subsequently loaded with <em>Spirulina platensis</em> biomass followed by physicochemical characterization. FT-IR spectrum revealed the absence of new absorption bands in the SpCsNPs spectra indicating that the physical interaction is the main mechanism by which <em>Spirulina</em> was incorporated into the chitosan nanoparticles. XRD confirmed analyses showed the composite with a discernible decrease in peak intensity along with a small peak broadening indicates a drop in the degree of crystallinity. Using SEM, the incorporated <em>Spirulina</em> biomass produced a more uniform integrated morphology within the chitosan matrix which is indicative of successful loading to improve its stability and dispersion into fish diets. EDS analysis showed that successfully <em>Spirulina</em> biomass incorporation without changing the polymer's basic elemental structure. A 30-day feeding trial was conducted using four experimental diets: commercial diet (control), commercial feed baseline, diet supplemented with CsNPs, and diet supplemented with SpCsNPs. Fish fed the SpCsNPs-supplemented diet exhibited significantly an improved feed conversion ratio 1.065. High survival rates indicate that both CsNPs and SpCsNPs were well tolerated by fish with no adverse effects. In addition, fish receiving the SpCsNPs diet showed significantly higher body protein and lipid contents. In conclusion, this study is among the few reports evaluating SpCsNPs as a dietary supplement for enhancing growth performance and feed efficiency in Red Tilapia. This approach offers a promising, practical feed additive for improving aquaculture productivity and nutritional quality.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"97 ","pages":"Article 104802"},"PeriodicalIF":5.0,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148554910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Spatial compartmentalization of the metabolome and epiphytic microbiome in farmed Undaria pinnatifida: Implications for tissue-specific holobiont function 养殖裙带菜代谢组和附生微生物组的空间区隔:对组织特异性全息功能的影响
IF 5 2区 生物学
Algal Research-Biomass Biofuels and Bioproducts Pub Date : 2026-07-01 Epub Date: 2026-06-27 DOI: 10.1016/j.algal.2026.104813
Ruibin Sun, Yining Chen, Jing Zhang, Xiaodong Li, Xu Gao
{"title":"Spatial compartmentalization of the metabolome and epiphytic microbiome in farmed Undaria pinnatifida: Implications for tissue-specific holobiont function","authors":"Ruibin Sun,&nbsp;Yining Chen,&nbsp;Jing Zhang,&nbsp;Xiaodong Li,&nbsp;Xu Gao","doi":"10.1016/j.algal.2026.104813","DOIUrl":"10.1016/j.algal.2026.104813","url":null,"abstract":"<div><div>Thallus tissues of <em>Undaria pinnatifida</em> differ in form and function and are expected to structure epiphytic microbiomes and surface metabolite profiles. We combined 16S rRNA/ITS amplicon sequencing with untargeted LC-MS to compare apex, intercalary meristem, and sporophyll of farmed <em>U. pinnatifida</em>. LC-MS detected 1043 metabolite features. PCA/OPLS-DA separated tissues: the meristem and sporophyll were more similar to each other than to the apex, and between-tissue differences were significant by PERMANOVA (<em>P</em> = 0.001). Annotated metabolites were dominated by lipids and secondary metabolites (e.g., fatty acyls, sterol lipids, prenol/isoprenoid derivatives). Pairwise contrasts (VIP &gt; 1, <em>P</em> &lt; 0.05) identified 484, 385, and 222 differential metabolites in meristem vs apex, sporophyll vs apex, and meristem vs sporophyll, respectively. The enriched pathway signals included glycerophospholipid and glycerolipid metabolism, and glycine/serine/threonine metabolism depending on the contrast. Epiphytic communities were also tissue-associated: bacterial composition differed significantly among tissues (<em>P</em> = 0.001), whereas fungal communities showed weaker, non-significant separation (<em>P</em> = 0.088). Representative genera enriched in the meristem were <em>Cocleimonas</em> (bacteria) and <em>Saccharomycopsis</em> (fungi), whereas <em>Rubritalea</em> and genus-unclassified fungi (incertae sedis) were higher in the sporophyll. Correlation analysis (|r| &gt; 0.6, <em>P</em> &lt; 0.01) indicated tissue-specific associations, with meristem-enriched taxa co-varying with amino-acid and oxylipin-related features, and sporophyll-enriched taxa co-varying with nucleotide-and nitrogen-related features. These associations are correlative rather than causal, but they generate testable hypotheses. Tissue-specific epiphytic microbiomes and metabolomes are consistent with the functional differentiation of tissues under cultivation and provide a basis for microbiome-informed management and targeted functional follow-ups in <em>U. pinnatifida</em>.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"97 ","pages":"Article 104813"},"PeriodicalIF":5.0,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148554906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Comparative genomics reveals the ecological adaptation of Paralia guyana to both planktonic and benthic habitats 比较基因组学揭示了圭亚那Paralia对浮游生物和底栖生物栖息地的生态适应
IF 5 2区 生物学
Algal Research-Biomass Biofuels and Bioproducts Pub Date : 2026-07-01 Epub Date: 2026-06-30 DOI: 10.1016/j.algal.2026.104825
Yuhang Luo, Kaiyue Yang, Weikang Deng, Eva C. Sonnenschein, Yuhang Li, Shuqi Wang, Jianbo Jian
{"title":"Comparative genomics reveals the ecological adaptation of Paralia guyana to both planktonic and benthic habitats","authors":"Yuhang Luo,&nbsp;Kaiyue Yang,&nbsp;Weikang Deng,&nbsp;Eva C. Sonnenschein,&nbsp;Yuhang Li,&nbsp;Shuqi Wang,&nbsp;Jianbo Jian","doi":"10.1016/j.algal.2026.104825","DOIUrl":"10.1016/j.algal.2026.104825","url":null,"abstract":"<div><div>As one of the early-diverging diatoms compared with sequenced genome lineages, <em>Paralia guyana</em> is capable of surviving in both planktonic and benthic habitats. It is one of the significant species contributing to harmful algal blooms. The underlying mechanism remains poorly understood and requires further investigation, particularly at the genomic level. With a high-quality reference genome, the phylogenetic status of <em>P. guyana</em> was confirmed and its divergence time was calculated. A total of 759 expanded gene families and 1168 contracted gene families were identified in <em>P. guyana</em> when compared to the other 13 diatom species and <em>Aureococcus anophagefferens</em>. A large number of specific genes containing functional domains show significantly higher abundance across various algal species. Expanded and highly abundant genes were linked to DNA replication, repair, and mismatch repair, indicating enhanced cellular capacity to handle increased DNA replication demands and potential damage. Approximately 2.74% of the total 27,121 genes were identified as putative originating from HGT. HGT genes were functional related with oxidation-reduction process, proteolysis, oxidoreductase activity and metabolic processes. These HGT-acquired genes, along with adaptive genes, enhanced the genomic plasticity and evolutionary potential of <em>P. guyana</em>, playing a crucial role in its ecological success.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"97 ","pages":"Article 104825"},"PeriodicalIF":5.0,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148554907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Zonarol, a sesquiterpene from the brown algae Dictyopteris undulata, alleviates rotenone-induced Parkinson's disease via modulation of the Keap1/Nrf2 signaling pathway Zonarol是一种来自褐藻Dictyopteris undulata的倍半萜,通过调节Keap1/Nrf2信号通路减轻鱼藤酮诱导的帕金森病
IF 5 2区 生物学
Algal Research-Biomass Biofuels and Bioproducts Pub Date : 2026-07-01 Epub Date: 2026-06-18 DOI: 10.1016/j.algal.2026.104799
Xinxin Liu, Ruiqi Zhang, Yi Liu, Jia Han, Sohsuke Yamada, Tomoyuki Koyama
{"title":"Zonarol, a sesquiterpene from the brown algae Dictyopteris undulata, alleviates rotenone-induced Parkinson's disease via modulation of the Keap1/Nrf2 signaling pathway","authors":"Xinxin Liu,&nbsp;Ruiqi Zhang,&nbsp;Yi Liu,&nbsp;Jia Han,&nbsp;Sohsuke Yamada,&nbsp;Tomoyuki Koyama","doi":"10.1016/j.algal.2026.104799","DOIUrl":"10.1016/j.algal.2026.104799","url":null,"abstract":"<div><div>Parkinson's disease (PD) is one of the most prevalent neurodegenerative diseases worldwide. Zonarol (ZO), a sesquiterpene hydroquinone isolated from the brown alga <em>Dictyopteris undulata</em>, has been reported to exhibit high blood–brain barrier permeability and potential neuroprotective properties. In this study, we investigated the neuroprotective effects of ZO in a rotenone-induced PD mouse model and explored the underlying mechanisms. Mice (male ICR, 8 weeks old, <em>n</em> = 36) were randomly assigned to four groups: control, rotenone (Rot), Rot+ZO (25 mg/kg), and Rot+ZO (50 mg/kg). Mice received subcutaneous injections of rotenone (2.5 mg/kg every 2 days) and administered ZO orally for 41 days. Immunohistochemistry was conducted in the substantia nigra and striatum, whereas biochemical and Western blot analyses used whole-brain homogenates. ZO partially improved motor function, as evidenced by decreased descent latency in the pole test and increased locomotor activity in the open field test. Moreover, TH immunohistochemical staining and biochemical analyses revealed that ZO attenuated rotenone-induced reduction of TH-positive signals in the substantia nigra and striatum with increased TH activity and dopamine levels. ZO markedly suppressed oxidative stress in the brain and modulated the Nrf2 signaling pathway, upregulating heme oxygenase-1 and NAD(<em>P</em>)H quinone oxidoreductase 1 without altering Keap1 expression. Moreover, we demonstrated in vitro that ZO undergoes metal-catalyzed oxidation to zonarone, reacting with the thiol groups of reduced glutathione and recombinant human Keap1. Thus, ZO protects dopaminergic neurons against rotenone-induced neurotoxicity by attenuating oxidative stress, likely via Keap1 modification and Nrf2 signaling modulation, suggesting its therapeutic potential for PD.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"97 ","pages":"Article 104799"},"PeriodicalIF":5.0,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148554974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Drivers of variability in published microalgae fatty acid profiles: Taxonomic distinctions are limited 微藻脂肪酸谱变异的驱动因素:分类区分是有限的
IF 5 2区 生物学
Algal Research-Biomass Biofuels and Bioproducts Pub Date : 2026-07-01 Epub Date: 2026-06-19 DOI: 10.1016/j.algal.2026.104807
Tamás Pálmai, Daniel L. Roelke, Karl Kaiser
{"title":"Drivers of variability in published microalgae fatty acid profiles: Taxonomic distinctions are limited","authors":"Tamás Pálmai,&nbsp;Daniel L. Roelke,&nbsp;Karl Kaiser","doi":"10.1016/j.algal.2026.104807","DOIUrl":"10.1016/j.algal.2026.104807","url":null,"abstract":"<div><div>Microalgae are key nutrient sources in aquatic ecosystems and aquaculture, widely used as feed due to their valuable biochemical composition, including proteins, lipids, and carbohydrates. Among these components, fatty acid (FA) composition is particularly important. Previous studies have reported highly species-specific FA profiles in many microalgal species relevant to aquaculture. In this study, we analyzed 430 FA profile observations across seven genera (<em>Chaetoceros</em>, <em>Isochrysis</em>, <em>Nannochloropsis</em>, <em>Pavlova</em>, <em>Phaeodactylum</em>, <em>Rhodomonas</em>, and <em>Tetraselmis</em>) to identify the main drivers of variability in FA composition. We observed a mean within-species similarity of 68.7%, indicating substantial variability within species, while the mean between-species similarity was 49.3%, supporting the presence of species-specific FA signatures. Permutational multivariate analysis of variance (PERMANOVA) identified four variables with significant effects on FA profiles. Study-specific effects were the strongest (R<sup>2</sup> = 0.123, <em>p</em> &lt; 0.0005), followed by species identity (R<sup>2</sup> = 0.031, p &lt; 0.0005), culture medium (R<sup>2</sup> = 0.022, p &lt; 0.0005), and the FA standard applied (R<sup>2</sup> = 0.0098, p &lt; 0.0005). Variation partitioning further revealed substantial shared effects among these factors. The interaction between study and species explained 20% of the total variance in FA composition, while the combined effect of study, species, and culture medium accounted for 10%. Additional shared effects were observed for study-medium (8%) and species-FA standard (6%). Overall, our results demonstrate a strong study-specific influence on reported FA profiles, emphasizing the need for caution when using literature-derived FA data to formulate optimized aquaculture diets.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"97 ","pages":"Article 104807"},"PeriodicalIF":5.0,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148554909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A comprehensive review of immobilized microorganism-based antibiotic removal technology: Applications from bacteria, microalgae, and hybrid systems 基于固定化微生物的抗生素去除技术综述:从细菌、微藻和杂交系统的应用
IF 5 2区 生物学
Algal Research-Biomass Biofuels and Bioproducts Pub Date : 2026-07-01 Epub Date: 2026-06-27 DOI: 10.1016/j.algal.2026.104814
Jiayi Shi, Ziyi Zhang, Ping Zhang, Tianwei Hao, Shan Chen
{"title":"A comprehensive review of immobilized microorganism-based antibiotic removal technology: Applications from bacteria, microalgae, and hybrid systems","authors":"Jiayi Shi,&nbsp;Ziyi Zhang,&nbsp;Ping Zhang,&nbsp;Tianwei Hao,&nbsp;Shan Chen","doi":"10.1016/j.algal.2026.104814","DOIUrl":"10.1016/j.algal.2026.104814","url":null,"abstract":"<div><div>Immobilized microorganisms represent a transformative strategy for addressing global sustainability challenges, as they retain biological activity and offer reusability. This review provides a comprehensive overview of state-of-the-art immobilization technologies applied in biological wastewater treatment, with a particular emphasis on the removal of antibiotics using various combinations of immobilized microalgae and/or bacteria. A critical evaluation is conducted on the performance of current common immobilization technologies, including crosslinking, adsorption, entrapment, and multi-type immobilization methods, in treating synthetic and real wastewater contaminated with antibiotics. The underlying mechanisms of antibiotic removal by immobilized microorganisms are elucidated. Special attention is given to summarizing the influence of immobilization carrier selection, mass transfer limitation, environmental factor influence, and other key factors on the efficiency of this wastewater treatment strategy. The review further provides detailed application scenarios of immobilized microorganisms for antibiotic removal, including their use in bioreactors, advanced oxidation processes, and co-immobilized systems of microalgae and bacteria, with valorization pathways of these green biotechnologies. Finally, the review highlights the significance of immobilized microorganism-based technologies and outlines future research directions across multiple fields.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"97 ","pages":"Article 104814"},"PeriodicalIF":5.0,"publicationDate":"2026-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148554908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
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