Journal of Applied Phycology最新文献

{"title":"Bacterial disease in seaweed aquaculture: pathogen diversity and future solutions.","authors":"Shauna Corr, Chris Lowe, Michiel Vos","doi":"10.1007/s10811-026-03835-7","DOIUrl":"10.1007/s10811-026-03835-7","url":null,"abstract":"<p><p>In recent years, there has been a rapid expansion in seaweed aquaculture due to the increased demand for sustainable food, pharmaceuticals, and other industrial needs. This growth has been accompanied by a rise in disease prevalence, jeopardising the economic viability of seaweed farming and the livelihoods of millions reliant on the sector. Here, through focusing on the complex interactions between seaweed hosts and their microbial communities, we review current knowledge on bacterial seaweed pathogens. We discuss the challenges associated with pathogen identification, including the constraints of traditional approaches and the complexities arising from resident commensal bacteria. We then assess the use of probiotics, selective breeding, Integrated Multi-Trophic Aquaculture (IMTA), site selection, and the priming of early life stages as emerging disease management strategies, while highlighting the need for omics-based studies to identify disease biomarkers and commercially relevant disease-resistant strains. We conclude by underlining the importance of early detection systems and improved knowledge dissemination within the sector to enable a more proactive and sustainable approach to disease management.</p>","PeriodicalId":15086,"journal":{"name":"Journal of Applied Phycology","volume":"38 3","pages":"2143-2162"},"PeriodicalIF":3.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13263216/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148251784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mitochondrial phylogenomics of eucheumatoids (Solieriaceae, Rhodophyta) from the Indo-Pacific.","authors":"Ji Tan, Sze-Wan Poong, Janina Brakel, Eka Sunarwidhi Prasedya, Flower E Msuya, Claire Gachon, Michael Y Roleda, Richard V Dumilag, Paul Joanne, Fred Pascal, Juliet Brodie, Amelia S Buriyo, Sadock Rusekwa, Shuhadah Mustapha, Phaik-Eem Lim","doi":"10.1007/s10811-026-03784-1","DOIUrl":"10.1007/s10811-026-03784-1","url":null,"abstract":"<p><p>Eucheumatoid seaweeds are highly valued globally for their carrageenan. Members of this group are widely distributed and cultivated throughout the Indo-Pacific. Despite various molecular studies on this group, mitogenome research in eucheumatoids has only recently explored a limited number of species, leaving overall diversity largely unexplored. In this study, 26 complete mitogenomes of eucheumatoids from the Indo-Pacific were sequenced, including the first complete sequences for wild genotypes of <i>Eucheuma platycladum</i>, <i>Kappaphycus striatus</i>, <i>Kappaphycopsis cottonii,</i> and an unidentified species of <i>Kappaphycus</i> from Africa. The eucheumatoid mitogenomes range from 25.1 to 25.5 kb in size, containing 50 genes (24 protein-coding genes, 24 tRNA genes, two rRNA genes, and a single intron) bearing extensive gene synteny across species. Phylogenetic analyses using concatenated mitochondrial genes recovered strong clades for each group, with the exception of the genus <i>Eucheuma</i>. Apart from <i>atp</i>9, gene marker evaluations showed that all genes could be used for species identification. The utility of four genes, <i>atp</i>4, <i>nad</i>3, <i>nad</i>4, and <i>nad</i>6, was found to be effective for resolving intergeneric relationships. These findings provide a foundation for comparative analysis useful for resolving phylogenetic relationships and outstanding taxonomic issues, cultivar development, and conservation efforts. Expanding species coverage and incorporating plastome analyses would contribute to a more complete understanding of the genomic diversity and evolutionary history of this economically important group of seaweeds.</p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at 10.1007/s10811-026-03784-1.</p>","PeriodicalId":15086,"journal":{"name":"Journal of Applied Phycology","volume":"38 2","pages":"1771-1782"},"PeriodicalIF":3.6,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13156119/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147868271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"NaHCO3-driven poly-β-hydroxybutyrate biosynthesis in Synechocystis sp. PCC6803 under multi-stress conditions","authors":"Ximing Li, Guozhan Liang, Yaling Liang, Fantao Kong, Zhanyou Chi","doi":"10.1007/s10811-025-03696-6","DOIUrl":"https://doi.org/10.1007/s10811-025-03696-6","url":null,"abstract":"","PeriodicalId":15086,"journal":{"name":"Journal of Applied Phycology","volume":"37 6","pages":"3965-3978"},"PeriodicalIF":0.0,"publicationDate":"2025-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147880169","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}

{"title":"Optimizing microalgae cultivation for enhanced lutein production: screening of high-yield strains and cultivation strategy development","authors":"Yuelian Li, Han Sun, Yunlei Fu, Shufang Yang, Xue Lu","doi":"10.1007/s10811-025-03578-x","DOIUrl":"https://doi.org/10.1007/s10811-025-03578-x","url":null,"abstract":"","PeriodicalId":15086,"journal":{"name":"Journal of Applied Phycology","volume":"37 4","pages":"2281-2293"},"PeriodicalIF":0.0,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147877860","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}

{"title":"Preparation of a novel cationic guar gum-Fe3O4 magnetic nanoparticles for effective harvesting of Microcystis aeruginosa","authors":"Wu Wang, Yufeng Zhu, Yangfan Fang, Fanglu Hu, Chuyin Liu, Xinyi Sun, Na Jiang, Yunfeng Xu","doi":"10.1007/s10811-025-03488-y","DOIUrl":"https://doi.org/10.1007/s10811-025-03488-y","url":null,"abstract":"","PeriodicalId":15086,"journal":{"name":"Journal of Applied Phycology","volume":"37 3","pages":"1823-1832"},"PeriodicalIF":0.0,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147330762","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}

{"title":"Global interfertility and heterosis in sugar kelp populations: a next step in sugar kelp breeding.","authors":"Job Cohen, Robert Twijnstra, Jessica Schiller, Gabriel Montecinos Arismendi, Brigit Reus, Karline Soetaert, Klaas Timmermans","doi":"10.1007/s10811-025-03447-7","DOIUrl":"https://doi.org/10.1007/s10811-025-03447-7","url":null,"abstract":"<p><p>The potential of seaweed aquaculture is restricted by high labor, production and processing costs, leading to low economic viability. Selective breeding can improve yields and cultivation efficiency, thereby decreasing production costs. Until now, genetic resources as input for <i>Saccharina latissima</i> breeding trials have been sourced strictly locally, due to concerns regarding outplanting genetically exogenous material in local waters. Here we study, for the first time, worldwide interregional fertility of the seaweed <i>S. latissima,</i> in order to assess the potential of including global <i>S. latissima</i> genetic resources for selective breeding with regard to heterosis. We quantified the yield (as an indicative aquacultural performance) and morphological traits of intra- and interregional <i>S. latissima</i> hybrids originating from a broad range of locations in a common garden experiment. Our results show that the practical application of worldwide <i>S. latissima</i> genetic resources in breeding programs is feasible based on global interfertility. We found a wide morphological diversity of hybrids and observed significant heterosis in interregional hybrids. The degree of heterosis could not be linked to geographic distance. These findings reveal that worldwide genetic resources can considerably contribute to <i>S. latissima</i> breeding programs and could offer a major next step in improving yields and quality traits.</p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at 10.1007/s10811-025-03447-7.</p>","PeriodicalId":15086,"journal":{"name":"Journal of Applied Phycology","volume":"37 2","pages":"1213-1226"},"PeriodicalIF":2.8,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12055653/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144002280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The influence of seeding method and water depth on the morphology and biomass yield of farmed sugar kelp (<i>Saccharina latissima</i>) at a small-scale cultivation site in the northeast Atlantic.","authors":"Catherine M Wilding, Kathryn E Smith, Carly L Daniels, Jessica Knoop, Dan A Smale","doi":"10.1007/s10811-024-03394-9","DOIUrl":"10.1007/s10811-024-03394-9","url":null,"abstract":"<p><p>Seaweed farming is a rapidly growing global industry, driven by increasing demand for biomass with a range of commercial applications. A major barrier limiting expansion of the industry is the need for cost-effective approaches to production. Established twine seeding methods are reliable, but recently developed binder methods offer potential scalability while minimising hatchery costs. Here, we compared growth of the farmed kelp <i>Saccharina latissima</i> using these two seeding methods. We also examined the influence of water depth on biomass production within a vertical cultivation system. Twine consistently achieved greater <i>S. latissima</i> biomass yield, with mean biomass almost four times higher than from binder seeding, and sporophytes reaching significantly greater density and total length. The biomass, length and density of <i>S. latissima</i> decreased with increasing water depth, a pattern which was more pronounced with twine seeding. We also observed morphological variability, with larger individuals on twine compared with binder treatments at all depths. Natural settlement of the non-target macroalga <i>Sacchoriza polyschides</i> was also recorded, at significantly greater biomass on binder treatments and at greater depths. Further work is needed to examine the predictability and extent of natural settlement of <i>S. polyschides</i>, and its potential as a commercially-viable species. Overall, twine seeding methods out-performed binder at a relatively dynamic, open coast, small-scale cultivation site. Moreover, while vertical cultivation systems can maximise yield relative to the spatial footprint of a seaweed farm, the marked reduction in cultivated biomass with increasing water depth should be considered within the local environmental context.</p>","PeriodicalId":15086,"journal":{"name":"Journal of Applied Phycology","volume":"37 1","pages":"459-470"},"PeriodicalIF":2.8,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11897108/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143624763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimizing nursery conditions of the commercial kelp <i>Alaria esculenta</i>.","authors":"Reina J Veenhof, Rob Grisenthwaite, Alison Mair, Elaine Mitchell, Michele S Stanley, Puja Kumari","doi":"10.1007/s10811-025-03665-z","DOIUrl":"10.1007/s10811-025-03665-z","url":null,"abstract":"<p><p>A global rise in kelp aquaculture has resulted in an increased demand for high quality and quantity kelp seedstock, yet many bottlenecks remain to sustainable scale-up solutions. One such bottleneck is increasing biomass quickly and efficiently in the nursery phase of the kelp cultivation cycle. The microscopic gametophyte is leveraged during this phase, using red light to stimulate vegetative growth and delay onset of gametophyte fertility until deployment. However, red light may make the gametophyte less photosynthetically efficient and thus slow growth. A solution may be growing gametophytes in blue light, which can increase production, while changing the nutrient composition of the media to repress fertility. Here we test the efficacy of light source (blue and red), two common media types (PES and f/2) and iron supplementation on the growth, fertility and photosynthetic parameters of <i>Alaria esculenta</i> gametophytes, a commercial kelp species. We found the highest biomass was achieved under blue light with iron-free f/2. Similarly, pigment concentration was higher in blue light and iron-free f/2, while gametophytes were found to have more shade-adapted pigment characteristics under red light. Red light strongly supressed formation of sporophytes and while withholding iron did not supress fertility in blue light, it did result in less malformed sporophytes. Based on this research, we recommend growing <i>A. esculenta</i> gametophytes in iron-free f/2. Failure of iron-free media to supress fertility in blue light may be due to iron retention of gametophytes or trace levels of iron in seawater, which warrants further research.</p><p><strong>Supplementary information: </strong>The online version contains supplementary material available at 10.1007/s10811-025-03665-z.</p>","PeriodicalId":15086,"journal":{"name":"Journal of Applied Phycology","volume":"37 5","pages":"3031-3042"},"PeriodicalIF":3.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12672681/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145677676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Plant seedling growth and soil respiration responses to seasonal United Kingdom seaweed wrack extracts.","authors":"Jose G Gutierrez Higa, Adetunji Alex Adekanmbi, Samantha Kehoe, Tom Sizmur, Aaron Brown, Jessica M M Adams","doi":"10.1007/s10811-025-03664-0","DOIUrl":"10.1007/s10811-025-03664-0","url":null,"abstract":"<p><p>Macroalgal extracts offer an alternative option to increase crop yields and plant performance whilst reducing reliance on inorganic chemical fertilisers. Macroalgae have high concentrations of bioactive compounds capable of enhancing crop growth, stress tolerance and pest resistance. This study investigated whether seasonal variation in the chemical composition of three brown seaweeds <i>Ascophyllum nodosum</i>, <i>Fucus serratus</i> and <i>Fucus vesiculosus</i> affected plant growth in <i>Arabidopsis thaliana</i>, <i>Beta vulgaris</i> and <i>Lactuca sativa</i> through different extract concentrations. Crops were treated with 1:20, 1:50 and 1:100 dilutions from macroalgal extracts and compared to controls tap water, deionised water and one commercial macroalgae-based fertiliser made from <i>A. nodosum</i>. Dry weight assessment results revealed that moderately diluted dosages had better effects on plant growth than concentrated dosages, showing that the most suitable concentrations of all macroalgae extracts are 1:50 for <i>Arabidopsis</i>; no trend was detected in <i>B. vulgaris</i> or <i>L. sativa</i> growth. Overall, there were peaks of increased plant growth when treated with extracts harvested in June and August, which correlates with fertility peaks in commercial brown macroalgae in the wild. These results suggest that the optimal harvest for <i>A. nodosum</i>, <i>F. serratus</i> and <i>F. vesiculosus</i> for plant stimulant products should occur between May and August at sustainable harvest levels. Soil respirometry trials using the extracts showed no differences in CO₂ fluxes between the macroalgal species, different harvesting seasons, or correlation with plant biomass. It is therefore likely that macroalgal extracts impact the plant directly and produce minor impact on soil microbiota. Thus, these results support the use of macroalgal fertilizers as a low-cost and environmentally friendly alternative to chemical fertilisers.</p>","PeriodicalId":15086,"journal":{"name":"Journal of Applied Phycology","volume":"37 6","pages":"4669-4685"},"PeriodicalIF":3.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12764646/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145906012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication and characterizations of biodegradable films based on polysaccharide from Pyropia yezoensis waste with antioxidant and antibacterial activities","authors":"Qiang Xi, Yuling Song, Jianfeng Niu, Wenhui Gu, Xulei Wang, Songcui Wu, Yuhong Zhang, Lijun Wang, Guangce Wang","doi":"10.1007/s10811-024-03369-w","DOIUrl":"https://doi.org/10.1007/s10811-024-03369-w","url":null,"abstract":"","PeriodicalId":15086,"journal":{"name":"Journal of Applied Phycology","volume":"37 1","pages":"553-566"},"PeriodicalIF":0.0,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147918430","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}