Journal of Phycology最新文献_第2页

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

Strong genetic differentiation and low genetic diversity in a habitat-forming fucoid seaweed (Cystophora racemosa) across 850 km of its range. 一种生长于850公里范围内形成栖息地的岩藻（Cystophora racemosa）遗传分化强，遗传多样性低。

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-05-03 DOI: 10.1111/jpy.70023

Jane M Edgeloe, Samuel Starko, Albert Pessarrodona, Melinda A Coleman, Jacqueline Batley, Thomas Wernberg, Georgina V Wood

{"title":"Strong genetic differentiation and low genetic diversity in a habitat-forming fucoid seaweed (Cystophora racemosa) across 850 km of its range.","authors":"Jane M Edgeloe, Samuel Starko, Albert Pessarrodona, Melinda A Coleman, Jacqueline Batley, Thomas Wernberg, Georgina V Wood","doi":"10.1111/jpy.70023","DOIUrl":"https://doi.org/10.1111/jpy.70023","url":null,"abstract":"Temperate seaweed forests are among the most productive and widespread habitats in coastal waters. However, they are under threat from climate change and other anthropogenic stressors. To effectively conserve and manage these ecosystems under these rising pressures, an understanding of the genetic diversity and structure of habitat-forming seaweeds will be necessary. Australia's Great Southern Reef, a global hotspot of endemic diversity, is home to one of the world's most speciose habitat-forming seaweed genera, Cystophora (order Fucales). Despite severe declines in some species, genomic data on this genus remain limited. We used a reduced representation genomic approach (DaRTSeq) to investigate the genetic diversity and structure of Cystophora racemosa, a dominant canopy-forming species, across ~850 km of its range. Our sequencing captured 4741 high-quality single nucleotide polymorphisms (SNPs), and we distinguished neutral loci from those under natural selection (i.e., outlier loci). We identified strong population structure and high genetic differentiation for both neutral (mean FST = 0.404) and outlier loci (mean FST = 0.901). Across populations, genetic diversity was low (neutral: mean HE = 0.046; outlier: HE = 0.042), with high inferred inbreeding (neutral loci mean FIS = 0.531) and no evidence of isolation-by-distance. Several SNPs (n = 70) were observed to be putatively adaptive, with most (97%) correlated with annual maximum sea surface temperature (SST, °C), indicating local adaptation to this key ocean variable. Our results show that C. racemosa populations have low genetic diversity and high differentiation, both of which may increase the vulnerability of this important foundation species to global change.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144023438","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

What is Fragilaria koensabbei and does it matter what it is called? (Meta)barcoding and the science of taxonomy. 什么是香菜？它叫什么名字有关系吗？（元）条形码与分类学。

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-05-03 DOI: 10.1111/jpy.70020

David M Williams

引用次数: 0

Restoring coastal resilience: The role of macroalgal forests in oxygen production and pH regulation 恢复沿海恢复力：大藻林在氧气生产和pH调节中的作用

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-05-01 DOI: 10.1111/jpy.70019

Jérémy Carlot

引用次数: 0

Intraspecific diversity in Raphidiopsis raciborskii: A key to its invasive success Raphidiopsis raciborskii种内多样性：其入侵成功的关键

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-05-01 DOI: 10.1111/jpy.70011

Anusuya Willis

引用次数: 0

The role of microbiota in kelp gametophyte development and resilience to thermal stress. 微生物群在海带配子体发育和热应激恢复中的作用。

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-04-29 DOI: 10.1111/jpy.70018

Reina J Veenhof, Alexander H McGrath, Curtis Champion, Symon A Dworjanyn, Ezequiel M Marzinelli, Melinda A Coleman

{"title":"The role of microbiota in kelp gametophyte development and resilience to thermal stress.","authors":"Reina J Veenhof, Alexander H McGrath, Curtis Champion, Symon A Dworjanyn, Ezequiel M Marzinelli, Melinda A Coleman","doi":"10.1111/jpy.70018","DOIUrl":"https://doi.org/10.1111/jpy.70018","url":null,"abstract":"Ocean warming is driving profound changes in the ecology of marine habitat formers such as kelps, with negative implications for the biodiversity and ecosystem services they support. Thermal stress can disturb associated microbiota that are essential to the healthy functioning of kelp, but little is known about how this process influences early-life stages. Because kelps have a biphasic life cycle, thermal stress dynamics of adult sporophyte microbiota may not reflect those of the free-living haploid gametophyte. We investigated the role of microbial disruption under thermal stress on gametophytes of the kelp Ecklonia radiata and compared sporophyte and gametophyte microbiota. The microbiota of gametophytes changed significantly when the microbiome was disrupted and under increased temperature (26°C), in which putative generalist bacterial taxa proliferated and bacterial families associated with nitrogen fixation decreased. Concurrently, the survival of gametophytes decreased to <10%, and surviving gametophytes did not become fertile when the microbiome was disrupted. The length of gametophytes decreased under both microbial disruption and thermal stress. Taken together, this suggests that the associated microbiota of Ecklonia gametophytes is important for their survival, fertility, and response to warming. Gametophyte and parental sporophyte microbiota were also distinct from the water column but not each other, suggesting vertical transmission of microbiota from one life stage to the next. This study furthers our understanding of the role of microbiota in gametophyte stress tolerance as well as the acquisition of microbiota, which may prove vital in protecting and increasing the stress resilience of these foundation species.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144023453","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

Fluvioralfsia iberica gen. et sp. nov., Fluvioralfsiaceae fam. nov.: The first freshwater member of the Ralfsiales (Phaeophyceae), collected from streams in Spain. 伊比利亚飞虱属，11月，飞虱科。十一月：第一个淡水成员的Ralfsiales (Phaeophyceae)，从西班牙的溪流收集。

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-04-29 DOI: 10.1111/jpy.70022

Andrés Mellado-Díaz, José Luis Moreno, María Verdugo-Althöfer, John D Wehr, Gary W Saunders

{"title":"Fluvioralfsia iberica gen. et sp. nov., Fluvioralfsiaceae fam. nov.: The first freshwater member of the Ralfsiales (Phaeophyceae), collected from streams in Spain.","authors":"Andrés Mellado-Díaz, José Luis Moreno, María Verdugo-Althöfer, John D Wehr, Gary W Saunders","doi":"10.1111/jpy.70022","DOIUrl":"https://doi.org/10.1111/jpy.70022","url":null,"abstract":"A novel brown alga inhabiting freshwater streams in Spain is described herein as Fluvioralfsia iberica gen. et sp. nov. Phylogenetic analyses establish it as a novel lineage within the Ralfsiales, Fluvioralfsiaceae fam. nov. It is an epilithic crust, typically orbicular with a radial growth pattern, formed by dichotomous fan-like branching of filaments. Crusts show a bilateral symmetry with horizontal medial filaments that bend upward and downward to form circular or semilunar protrusions in concentric bands that overlap at different levels. Older crusts are easily seen with the naked eye, becoming greater than 50 cm in diameter and 1 cm thickness and can cover a high percentage of the stream bottom in optimal habitats. Differentiating characters from other families of Ralfsiales include the absence of phaeophycean hairs and plurangia and, most notably, the unangia originating intercalarily from lower cells of paraphyses. Most populations were located in first- to third-order calcareous streams and rivers, at altitudes of 14-870 m.a.s.l., in the mountainous Cantabrian coast, northern Spain, and one river in southeast Spain. Sites were entirely nonmarine, 2-118 km from the sea, with median conductance of 219 μS · cm-1 (range 112-859) in well-oxygenated, oligo-mesotrophic waters and moderate to high current velocities. As freshwater brown algae are a species-poor group, Fluvioralfsia iberica represents an important addition to the global freshwater algal flora and raises additional questions about the origins of phaeophytes in fresh waters.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144031257","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 simple and effective protocol for cryopreservation of germplasm of the bull kelp, Nereocystis luetkeana (Phaeophyceae). 牛海带（褐海带科）种质的一种简单有效的低温保存方法。

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-04-26 DOI: 10.1111/jpy.70013

Liam J M Coleman, Silven Read, Amnit K Sokhey, Sherryl Bisgrove

{"title":"A simple and effective protocol for cryopreservation of germplasm of the bull kelp, Nereocystis luetkeana (Phaeophyceae).","authors":"Liam J M Coleman, Silven Read, Amnit K Sokhey, Sherryl Bisgrove","doi":"10.1111/jpy.70013","DOIUrl":"https://doi.org/10.1111/jpy.70013","url":null,"abstract":"Kelps are large brown seaweeds that can form three-dimensional underwater forests that provide food and habitat for a wide diversity of marine organisms. They also provide a wealth of ecosystem services to humans and may be able to help combat climate change through blue carbon. However, kelps are currently in decline in many parts of the world, most likely due to rising ocean temperatures, and conservation action is needed quickly to preserve kelp biodiversity. One kelp conservation strategy that needs further development is biobanking, the storage of biological material. In particular, the development of cryopreservation protocols would permit easier storage of large quantities of kelp germplasm under stable conditions. In this paper, we compare the effectiveness of different cryoprotective agents-chemicals that mitigate the damaging effects of freezing on living tissue-for use in cryopreservation of gametophyte tissue of the bull kelp, Nereocystis luetkeana. We observed that when cryopreserved in a solution of 10% ethylene glycol + 9% sorbitol, Nereocystis gametophytes of both sexes showed excellent survivorship 6 weeks after removal from cryogenic conditions. Although kelp cryopreservation protocols still need to be further researched, we believe that these methods have great potential to improve and expand kelp biobanking, and we would encourage the development of protocols for more kelp species as well as more widespread adoption of cryopreservation by existing kelp biobanking efforts.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144024349","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

Corrigendum to “Floridanema gen. nov. (Aerosakkonemataceae, Aerosakkonematales ord. nov., Cyanobacteria) from benthic tropical and subtropical fresh waters, with the description of four new species” “热带和亚热带底栖淡水中的Floridanema gen. 11 . （Aerosakkonemataceae, Aerosakkonematales ord. nov.，蓝藻门），附四个新种的描述”的勘误表

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-04-23 DOI: 10.1111/jpy.70016

{"title":"Corrigendum to “Floridanema gen. nov. (Aerosakkonemataceae, Aerosakkonematales ord. nov., Cyanobacteria) from benthic tropical and subtropical fresh waters, with the description of four new species”","authors":"","doi":"10.1111/jpy.70016","DOIUrl":"https://doi.org/10.1111/jpy.70016","url":null,"abstract":"Moretto J. A., Berthold D. E., Lefler F. W., Huang I. S., & Laughinghouse H. D. 4th. (2025). Floridanema gen. nov. (Aerosakkonemataceae, Aerosakkonematales ord. nov., Cyanobacteria) from benthic tropical and subtropical fresh waters, with the description of four new species. Journal of Phycology, 61, 91–107. https://doi.org/10.1111/jpy.13533.In the Taxonomic description on page 6, the text “Holotype: US227747 (dried material in a metabolically inactive state of reference strain BLCC-F50), deposited in US” was incorrect. This should have read “Holotype: US227829 (dried material in a metabolically inactive state of reference strain BLCC-F50), deposited in US”.In the Taxonomic description on page 8, the text “Holotype: US227747 (dried material in a metabolically inactive state of reference strain BLCC-F167), deposited in US” was incorrect. This should have read “Holotype: US227856 (dried material in a metabolically inactive state of reference strain BLCC-F167), deposited in US”.Following the ICN (Shenzhen Code, Turland et al., 2018), these errors do not invalidate the type, thus Floridanema flaviceps and F. evergladense are valid from the original date of publication (Moretto et al., 2025).We also updated this information in Table S1.We thank Dr. Seán Turner for bringing the matter to our attention and apologize for this error.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":"61 2","pages":"393"},"PeriodicalIF":2.8,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jpy.70016","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892845","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}

引用次数: 0

A historical review of giant kelp harvesting in Tasmania. 塔斯马尼亚岛巨型海带收获的历史回顾。

IF 2.8 3区生物学

Journal of Phycology Pub Date : 2025-04-18 DOI: 10.1111/jpy.70015

Hunter Forbes, Wouter Visch, Scott Bennett, J Craig Sanderson, Jeffrey T Wright, Cayne Layton

{"title":"A historical review of giant kelp harvesting in Tasmania.","authors":"Hunter Forbes, Wouter Visch, Scott Bennett, J Craig Sanderson, Jeffrey T Wright, Cayne Layton","doi":"10.1111/jpy.70015","DOIUrl":"https://doi.org/10.1111/jpy.70015","url":null,"abstract":"Kelps have a long history of human use and exploitation. Knowledge of past harvesting practices offers insights into environmental baselines and the contemporary management and conservation of these critically important ecosystems. In Tasmania, Australia, giant kelp (Macrocystis pyrifera) was commercially harvested for alginate production from 1964 to 1973, but those forests have since undergone precipitous declines due primarily to climate change. We reviewed a collection of archival data and sources to describe the history, methods, and scale of this understudied and largely forgotten industry. We calculated that >65,000 tonnes (wet weight) of Macrocystis were harvested from eastern Tasmania over a decade (mean annual harvest = 6531 t), making it one of the largest wild harvest industries to ever exist in the region. However, the industry had challenges finding sufficient biomass to sustain operations, ultimately driving its closure in less than a decade. Feasibility surveys prior to harvesting suggested much greater kelp availability than was ultimately realized, perhaps motivating overexpansion. Against a backdrop of climate change in this ocean warming hotspot, harvest efforts grew wider and more intensive, and during summer months when stocks were lowest, almost all exploitable biomass was harvested. It remains unclear whether harvesting contributed to the decline of Tasmanian Macrocystis forests, but it may have reduced their resilience and exacerbated other stressors, particularly in heavily harvested areas. This historical review provides a rare opportunity to examine the past scale and use of now-endangered Macrocystis forests and also to help inform the contemporary management and conservation of seaweed resources.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143998230","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