Journal of Phycology最新文献

Abiotic stress destabilizes the bacterial community of sugar kelp, Saccharina latissima (Phaeophyceae). 非生物胁迫破坏了糖海带（糖藻科）细菌群落的稳定性。

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-05-28 DOI: 10.1111/jpy.70033

Siobhan Schenk, Connor Glen Wardrop, Laura Wegener Parfrey

{"title":"Abiotic stress destabilizes the bacterial community of sugar kelp, Saccharina latissima (Phaeophyceae).","authors":"Siobhan Schenk, Connor Glen Wardrop, Laura Wegener Parfrey","doi":"10.1111/jpy.70033","DOIUrl":"https://doi.org/10.1111/jpy.70033","url":null,"abstract":"As climate change progresses, the intensity and variability of freshwater outflow into the ocean are predicted to increase. The resulting increase in low-salinity events, paired with other abiotic stressors (including increasing temperatures), will be a source of stress for the kelp Saccharina latissima (Saccharina hereafter) and potentially Saccharina-associated bacteria. Bacteria influence host health and can facilitate or hinder host survival and acclimation to stressful abiotic conditions. Therefore, understanding how bacterial communities change under abiotic stress is critical for understanding how abiotic stress will affect kelp physiology. We investigated the effect of abiotic stress on Saccharina and associated bacteria by surveying the bacterial community associated with Saccharina across naturally occurring salinity and temperature gradients, coupled with salinity manipulation experiments. Overall, Saccharina harbored a stable core bacterial community, which decreased in relative abundance under abiotic stress. In the field, both salinity and temperature shaped the bacterial community, with temperature having higher explanatory power most of the time. In the lab, we confirmed that the patterns observed in the field could be replicated by manipulating salinity alone. Decreased relative abundance of core bacteria and increased community dissimilarity in low-salinity in the lab suggest that low-salinity alone can induce a stress response, detectable in the bacterial community of Saccharina.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144159680","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

The Great Barrier Reef, a center for Pelagophyceae (Heterokontophyta) diversity, including a new genus and seven new species. 大堡礁，远洋动物多样性中心，包括1个新属和7个新种。

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-05-28 DOI: 10.1111/jpy.70030

Richard Wetherbee, Allison van de Meene, Riyad Hossen, Robert A Andersen, Heroen Verbruggen

{"title":"The Great Barrier Reef, a center for Pelagophyceae (Heterokontophyta) diversity, including a new genus and seven new species.","authors":"Richard Wetherbee, Allison van de Meene, Riyad Hossen, Robert A Andersen, Heroen Verbruggen","doi":"10.1111/jpy.70030","DOIUrl":"https://doi.org/10.1111/jpy.70030","url":null,"abstract":"The pelagophytes are a morphologically diverse class of marine heterokont algae defined by deoxyribonucleic acid (DNA) gene sequences, the presence of a multilayered, perforated theca (PT), and the novel role of the Golgi apparatus in the formation and secretion of the PT, as well as materials for the synthesis of the outer extracellular layers (e.g., cell walls and mucilage). We established clonal cultures of sand-dwelling pelagophytes collected from intertidal and subtidal locations at Heron Island on the Great Barrier Reef (GBR), Australia, and established phylogenetic trees based on nuclear 18S rDNA and plastid rbcL, psaA, psaB, psbA, and psbC gene sequences that led to the discovery of seven new species and several interesting range extensions. The new genus and species, Revolvomonas australis, is sister to Pituiglomerulus and Chrysocystis in the Chrysocystaceae (Sarcinochrysidales, Pelagophyceae). Additional new species are Sarcinochrysis kraftii, Sa. guiryi, Arachnochrysis pilardiaziae, A. cassiotisii, Sungminbooa capricornica, and Su. tropica; also identified and cultured from the GBR were Sa. marina, Aureoumbra geitleri, Chrysoreinhardia giraudii, Chrysocystis fragilisi, and the planktonic Pelagomonas calceolata. Revolvomonas was studied in detail and has several unusual features for sand-dwelling pelagophytes. In just three short collecting trips to Heron Island, we were able to isolate and identify over 40% of the pelagophyte genera discovered to date. This study substantiates the diverse nature of pelagophytes and suggests tropical reef sand may be a center for pelagophyte diversity.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144159692","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

A systematic review of marine macroalgal degradation: Toward a better understanding of macroalgal carbon sequestration potential. 海洋大藻降解的系统综述：为了更好地了解大藻的碳固存潜力。

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-05-27 DOI: 10.1111/jpy.70031

Jessica R Kennedy, Caitlin O Blain

{"title":"A systematic review of marine macroalgal degradation: Toward a better understanding of macroalgal carbon sequestration potential.","authors":"Jessica R Kennedy, Caitlin O Blain","doi":"10.1111/jpy.70031","DOIUrl":"https://doi.org/10.1111/jpy.70031","url":null,"abstract":"Although macroalgae are gaining recognition for their potential role in marine carbon sequestration, critical knowledge gaps related to the fate of macroalgal carbon limit our capacity to quantify rates of macroalgal carbon sequestration. Understanding the degradation dynamics of macroalgal-derived biomaterials-including tissue/wrack, particulate organic matter/carbon (POM/POC), and dissolved organic carbon (DOC)-as well as the environmental drivers of decomposition are critical for assessing the longevity of macroalgal carbon and the potential storage capacity of macroalgae. Thus, a systematic literature review of macroalgal degradation studies was conducted to compile data, estimate the relative recalcitrance (i.e., relative stability) of macroalgal biomaterials, and elucidate key drivers of macroalgal decomposition dynamics. We found that macroalgal decay trajectories are highly variable and not always best described by the often-cited exponential decay models. Our analysis demonstrated that temperature was a notable driver of decomposition, with higher temperatures eliciting faster rates of decomposition. Furthermore, we found that brown algae had significantly higher proportions of recalcitrant biomaterials when compared to red algae. The impact of other factors, including biomaterial type, degradation environment, and tissue carbon and nitrogen content on macroalgal degradation, is variable across contexts, warranting further study. These results help to provide a foundation from which to plan and assess future studies on macroalgal degradation, which will improve our understanding of how macroalgae contribute to marine carbon cycles, trophic subsidies, and, potentially, marine carbon sequestration.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144150835","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

Monoicy, dioicy, and genetic structure in three species of Sheathia (Batrachospermales, Rhodophyta). 三种鞘属植物的单雌、雌雄蕊和遗传结构。

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-05-26 DOI: 10.1111/jpy.70032

Sarah J Shainker-Connelly, Solenn Stoeckel, Morgan L Vis, Stacy A Krueger-Hadfield

{"title":"Monoicy, dioicy, and genetic structure in three species of Sheathia (Batrachospermales, Rhodophyta).","authors":"Sarah J Shainker-Connelly, Solenn Stoeckel, Morgan L Vis, Stacy A Krueger-Hadfield","doi":"10.1111/jpy.70032","DOIUrl":"https://doi.org/10.1111/jpy.70032","url":null,"abstract":"Sexual systems (i.e., separate vs. combined sexes) vary widely among eukaryotes and influence the evolution of reproductive systems, which shape genetic structure and evolutionary trajectories. In diploid-dominant angiosperms, combined (i.e., hermaphroditism) and separate sexes are expected to correlate with selfing and outcrossing, respectively. When sex is determined in the haploid phase, selfing is possible even when there are separate sexes. The freshwater red macroalgal genus Sheathia (Batrachospermales) displays sexual system variation within and among populations, but no prior data exist on the reproductive systems of these populations. We developed 16 polymorphic microsatellite loci to characterize the reproductive system and genetic structure of three Sheathia species. We observed cross-amplification of loci across the three targeted species, suggesting these markers may be useful in other Sheathia spp. We observed variation in monoicy (i.e., hermaphroditism) versus dioicy (i.e., separate sexes) in each species, including S. americana, which was previously believed to be obligately dioicous. Our data suggest that S. americana and S. involuta display more variation in their prevailing reproductive modes as compared to S. grandis. Generally, dioicy resulted in greater diversity in contrast to monoicy. We observed strong population structure that is likely driven by uniparental reproduction and limited dispersal; however, there is limited population connectivity that may be facilitated by long-distance dispersal events. Overall, these data contribute to our knowledge of the relationship between the sexual system, reproductive system, and population genetic structure in haploid-diploid taxa, thereby informing a broader understanding of the evolution of sex.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144142831","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

Taxonomy of the genus Poterioochromonas (Chrysophyceae) based on morphological and molecular evidence. 基于形态学和分子证据的金菊属分类。

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-05-26 DOI: 10.1111/jpy.70028

Minseok Jeong, Jong Im Kim, Woongghi Shin

{"title":"Taxonomy of the genus Poterioochromonas (Chrysophyceae) based on morphological and molecular evidence.","authors":"Minseok Jeong, Jong Im Kim, Woongghi Shin","doi":"10.1111/jpy.70028","DOIUrl":"https://doi.org/10.1111/jpy.70028","url":null,"abstract":"The genus Poterioochromonas is characterized by spherical cells having two unequal flagella, a greenish, yellow-brown plastid, and a hemispherical cup-shaped lorica with a long, narrow stalk and a foot anchoring to the substrate. In this genus, the only three mixotrophic species having plastids have been reported up to date: P. malhamensis, P. nutans, and P. stipitata. However, we observed heterotrophic Poterioochromonas species that had lost their plastids, and we successfully cultured them. To understand the taxonomy of Poterioochromonas species, we performed a molecular phylogenetic analysis and observed their morphological features using light and scanning electron microscopes. For the phylogenetic analysis, we used a combined dataset from five gene sequences: the nuclear small subunit (SSU) rRNA gene, the large subunit (LSU) rRNA gene, the internal transcribed spacer region (ITS rRNA region 1-5.8S-ITS2), the plastid LSU rRNA gene, and the rbcL gene. The molecular phylogeny of the genus Poterioochromonas was divided into two major clades: mixotrophic and heterotrophic lineages. The mixotrophic clade comprised three species including two new species-P. andersenii sp. nov. and P. longicaulis sp. nov.-characterized by a colonial lifestyle and the long stalk of the lorica. The heterotrophic clade included the four new species-P. amplexa sp. nov., P. communis sp. nov., P. similis sp. nov., and P. sinechrysos sp. nov.-that had lost their plastids. The species P. amplexa produced a very distinctive stomatocyst, which features a true complex collar. Here, we report six new species of Poterioochromonas that exhibit mixotrophy and heterotrophy, showing that the phylogenetic tree is distinctly divided according to nutritional modes.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144142833","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

Green gold rush in the Baltic Sea: Investigating sea lettuce's performance by distribution mapping of valuable compounds in a fluctuating environment. 波罗的海的绿色淘金热：通过在波动的环境中绘制有价值化合物的分布图来研究海莴苣的性能。

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-05-21 DOI: 10.1111/jpy.70021

Sophie Steinhagen, Elena Schrofner-Brunner, Benedikt Schrofner-Brunner, Karin Larsson, Ingrid Undeland

{"title":"Green gold rush in the Baltic Sea: Investigating sea lettuce's performance by distribution mapping of valuable compounds in a fluctuating environment.","authors":"Sophie Steinhagen, Elena Schrofner-Brunner, Benedikt Schrofner-Brunner, Karin Larsson, Ingrid Undeland","doi":"10.1111/jpy.70021","DOIUrl":"https://doi.org/10.1111/jpy.70021","url":null,"abstract":"The growing prominence of Ulva in aquaculture is driven by its adaptability, rapid growth, nutritional advantages, and diverse biochemical composition. These green macroalgae have gained increasing attention for cultivation in lower salinity areas, expanding aquaculture beyond traditional euhaline environments. Our study investigated the distribution of economically valuable compounds in the most prominent Ulva crop species of the wider Baltic Sea region. We included 249 populations across the full Atlantic-Baltic Sea transect (>3000 km) and took into account prevailing fluctuating abiotic factors like salinity and nutrient regimes during the vegetation peak season. We revealed an overall trend of increasing crude protein content with increasing salinity in species with occurrence along the whole Atlantic-Baltic Sea transect (U. intestinalis: slope = 0.29; U. linza: slope = 0.09) and those only present in higher salinity regions (U. compressa: slope = 0.36; U. fenestrata: slope = 0.18) and confirmed an increase of pigments with increasing nitrogen tissue levels for most species (U. compressa: rpigments = 0.43; U. fenestrata: rpigments = 0.01; U. intestinalis: rpigments = 0.13; U. linza: rpigments = 0.21). With this mapping of the resource availability of valuable compounds in natural Ulva biomass of the Baltic Sea region, we have contributed to the understanding of the potential of Ulva species as key players in sustainable aquaculture practices evolving in the Baltic Sea region. Further, we have underscored the necessity of habitat-dependent crop selection and the importance of horticulture methodology for establishing Ulva as a viable future crop in the wider Baltic Sea.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144111120","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

Assessment of the spatial distribution of Chondria tumulosa, a nuisance macroalga at Manawai in Papahānaumokuākea Marine National Monument using high-resolution satellite imagery. 利用高分辨率卫星图像评估Papahānaumokuākea海洋国家保护区马纳威的一种令人讨厌的巨藻——软骨藻的空间分布。

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-05-12 DOI: 10.1111/jpy.70025

Leiana Beyer, Tomoaki Miura, Kaʻuaʻoa Fraiola, Heather L Spalding, Taylor M Williams, Jonathan Martinez, Randall K Kosaki, Keolohilani H Lopes

{"title":"Assessment of the spatial distribution of Chondria tumulosa, a nuisance macroalga at Manawai in Papahānaumokuākea Marine National Monument using high-resolution satellite imagery.","authors":"Leiana Beyer, Tomoaki Miura, Kaʻuaʻoa Fraiola, Heather L Spalding, Taylor M Williams, Jonathan Martinez, Randall K Kosaki, Keolohilani H Lopes","doi":"10.1111/jpy.70025","DOIUrl":"https://doi.org/10.1111/jpy.70025","url":null,"abstract":"In 2019, a red macroalgal species, Chondria tumulosa, was discovered overgrowing native coral and algal species and changing the benthic communities of Manawai (Pearl and Hermes Atoll) in Papahānaumokuākea Marine National Monument (PMNM). The main objective of this study was to assess the spatial distribution of C. tumulosa across the forereef and backreef of Manawai using satellite remote sensing. WorldView-2 and -3 commercial high-resolution satellite images were obtained for a 12-year period from 2010 to 2021, from which, time-series animations were created. Previous studies reported that C. tumulosa appeared as distinctively dark features in satellite imagery with the first evidence of C. tumulosa in 2015. Thus, the animations were visually inspected to identify dark patches that became visible around the time of discovery and persisted in subsequent years. Field survey data of C. tumulosa cover collected in 2019-2021 were used to gain confidence in the identification of dark patches. Using those dark features as a reference and a support vector machine, the latest high-resolution satellite images from the 12-year period were classified into a map of distinctive dark patches suspected to be C. tumulosa with an average overall accuracy of 78%. Accuracy assessments of the classification results of C. tumulosa based on field survey data collected in 2019-2021 resulted in an overall accuracy of 79%. This study leverages the use of remote sensing to map a newly discovered alga in a remote area in the hopes of providing managers with a methodology to further monitor the species for long-term management.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144031547","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

Selecting functional traits that capture trade-offs for intertidal macroalgae provides a roadmap for future studies. 选择能够捕获潮间带大型藻类权衡的功能特征为未来的研究提供了路线图。

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-05-12 DOI: 10.1111/jpy.70027

Lauren L Smith, Shalanda R Grier, Peggy Fong

{"title":"Selecting functional traits that capture trade-offs for intertidal macroalgae provides a roadmap for future studies.","authors":"Lauren L Smith, Shalanda R Grier, Peggy Fong","doi":"10.1111/jpy.70027","DOIUrl":"https://doi.org/10.1111/jpy.70027","url":null,"abstract":"Increased impacts from anthropogenic stressors are motivating the search for novel tools and approaches to understand ecosystem shifts and community change. Although trait-based approaches have provided powerful tools for many taxa, the functional ecology of marine macroalgae remains rooted in functional group models from the 1980s. Thus, we sought a core set of macroalgal traits to capture the diversity of ecological strategies that maintain ecological functions in a changing ocean. We first measured and analyzed a large number of functional traits to capture ecological strategies, and then used quantitative methods and examined the literature to select six core traits that captured the same strategies. We chose rocky intertidal sites, as they compress large shifts in environmental drivers into a small spatial scale, and chose seven morphologically diverse species collected across habitats and seasons. Permutational multivariate analyses of variance that included either 16 or six traits both determined significant differences across traits among species, with nearly equal explanatory power. In both data sets (16 vs. six traits), we discovered a resource acquisition trade-off along an axis of variation that maximizes either thallus height to facilitate resource acquisition by preemptive capture or relative surface area to increase uptake efficiency when lower resource supplies are available. Being taller, however, requires strength to resist disturbance (drag), whereas individuals with more surface area are shorter and weaker. Thus, we posit only six core traits are needed to capture ecological strategies for intertidal macroalgae in this rocky intertidal system, streamlining future research. Our results provide a roadmap for selecting traits that can rapidly advance exploration of trait-based ecology in other macroalgal-dominated ecosystems, providing a strong foundation to continue developing trait-based ecology for macroalgae across systems.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143970425","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

Recruitment of intertidal kelps Hedophyllum sessile and Alaria marginata (Laminariales) to articulated and crustose coralline algal species. 潮间带海带无柄海带和边缘海带（叠层海带）对关节和甲壳珊瑚藻类的补充。

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-05-06 DOI: 10.1111/jpy.70024

Ruby Burns, Brenton A Twist, Patrick T Martone

{"title":"Recruitment of intertidal kelps Hedophyllum sessile and Alaria marginata (Laminariales) to articulated and crustose coralline algal species.","authors":"Ruby Burns, Brenton A Twist, Patrick T Martone","doi":"10.1111/jpy.70024","DOIUrl":"https://doi.org/10.1111/jpy.70024","url":null,"abstract":"Kelps and coralline algae are important primary producers and habitat-builders in rocky intertidal ecosystems. On wave-exposed shores along the west coast of North America, Hedophyllum sessile and Alaria marginata are two dominant kelp species with juveniles that often occur at a higher density on articulated corallines than other available substrates. Little is known of the mechanisms underlying this interaction. One hypothesized mechanism is that articulated coralline algae enhance kelp spore settlement and germination. This study tested this hypothesis by releasing spores from H. sessile and A. marginata onto multiple genetically identified articulated and crustose coralline species, as well as bare rock, then observing subsequent sporophyte densities. Kelp recruitment was generally higher on articulated corallines than on crustose corallines, although there was variation across coralline species. There was no significant difference between recruitment on bare rock and on articulated corallines, and recruitment was higher on bleached Corallina vancouveriensis than on live C. vancouveriensis, suggesting that this articulated coralline actively inhibits rather than promotes intertidal kelp settlement. Thus, other mechanisms, such as protection from herbivory or wave action, likely explain observed distributions of kelp recruits. This research contributes to understanding how the fine-scale distribution of kelps is linked to that of corallines.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144041200","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 characterization of a spore development mutant in Pyropia yezoensis (Rhodophyta) induced via insertional mutagenesis. 插入诱变诱导的yezoensis （Rhodophyta）孢子发育突变体的分离和鉴定。

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-05-05 DOI: 10.1111/jpy.70026

Hikari Izumi, Yuji Nakai, Toshiki Uji, Kaz Nagaosa, Satoru Fukuda, Hiroyuki Mizuta, Naotsune Saga

{"title":"Isolation and characterization of a spore development mutant in Pyropia yezoensis (Rhodophyta) induced via insertional mutagenesis.","authors":"Hikari Izumi, Yuji Nakai, Toshiki Uji, Kaz Nagaosa, Satoru Fukuda, Hiroyuki Mizuta, Naotsune Saga","doi":"10.1111/jpy.70026","DOIUrl":"https://doi.org/10.1111/jpy.70026","url":null,"abstract":"Mechanistic elucidation of spore development is essential for understanding reproductive strategies and improving seaweed cultivation. In this study, we isolated a mutant with spore development defects in Pyropia yezoensis (Rhodophyta) from among genetic transformants generated via insertional mutagenesis. We characterized the mutant phenotype and identified the genomic region containing the mutation. The mutant produced spores (archeospores, zygotospores, and conchospores) at every relevant stage of the life history. No evident differences were observed in the appearance of the released spores at any stage under light microscopy between the wild-type and mutant strains; however, the mutant exhibited a trend of reduced spore release compared with the wild-type. Additionally, the archeospores released by the mutant remained round after being released from the sporangium, failed to adhere to the substratum, did not germinate, and showed no cell wall development after 4 days of standard culture, in contrast to the wild-type. Similar results were observed for the zygotospores and conchospores. These findings indicate that the main characteristic of this mutant was poor spore release, and the released spores failed to germinate. Whole-genome sequencing revealed the introduction of exogenous DNA into the nuclear genome of the mutant and suggested the presence of duplications, deletion, and inversion in the mutant genome. Notably, a deletion of approximately 13 kb was detected in the mutant genome flanking the insertion, and this region contained a plant homeodomain, suggesting that homeodomain-containing proteins may regulate spore development in P. yezoensis.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144023436","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