Journal of Phycology最新文献_第2页

A comprehensive review of Gracilaria vermiculophylla invasion along the east coast of the United States-Current knowledge and future directions. 美国东海岸黑棘尾草入侵的综合综述——目前的认识和未来的方向。

IF 3.4 3区生物学

Journal of Phycology Pub Date : 2026-04-24 DOI: 10.1111/jpy.70164

Leah M Nelson, Sophie J McCoy

{"title":"A comprehensive review of Gracilaria vermiculophylla invasion along the east coast of the United States-Current knowledge and future directions.","authors":"Leah M Nelson, Sophie J McCoy","doi":"10.1111/jpy.70164","DOIUrl":"https://doi.org/10.1111/jpy.70164","url":null,"abstract":"Gracilaria vermiculophylla, a red macroalga native to the Northwest Pacific, is now widespread in coastal estuarine ecosystems along the East Coast of the United States. Its broad environmental tolerance, high capacity for asexual reproduction via fragmentation, and ability to alter habitat structure have allowed it to persist and thrive, often outcompeting native macrophytes. This review synthesizes 48 studies on G. vermiculophylla from the East Coast of the United States, categorizing them into nine research areas: (1) Habitat Formation and Alteration; (2) Trophic Dynamics and Grazer Interactions; (3) Impacts on Nutrient Cycling and Biogeochemical Processes; (4) Microbial and Microalgal Interactions; (5) Responses to Climate Change; (6) Population Genetics; (7) Chemical Ecology; (8) Economic Impacts; and (9) Restoration and Management Implications. Although ecological and physiological studies dominate the literature, applied research on management, climate change impacts, and socio-economic outcomes remains limited. Addressing these knowledge gaps will require interdisciplinary approaches that link ecological, social, and economic dimensions to better develop effective management strategies. Effective management of G. vermiculophylla on the U.S. East Coast will require adaptive, context-dependent strategies that account for local habitat conditions, reproductive mode, and trade-offs between localized functions and the loss of native ecosystem services.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147774724","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 interaction between PII and NAGK regulates arginine biosynthesis in the green microalga Haematococcus pluvialis. PII和NAGK之间的相互作用调节了绿微藻雨红球菌的精氨酸生物合成。

IF 3.4 3区生物学

Journal of Phycology Pub Date : 2026-04-18 DOI: 10.1111/jpy.70165

Ruijuan Ma, Ziyue Chen, Junjie Liu, Xing Meng, Xinyi Tao, Yucheng Chen, Chunxiao Zhang, Ling Wang, Kangle Lu, Xueshan Li, Kai Song, Jianfeng Chen, Youping Xie

{"title":"The interaction between PII and NAGK regulates arginine biosynthesis in the green microalga Haematococcus pluvialis.","authors":"Ruijuan Ma, Ziyue Chen, Junjie Liu, Xing Meng, Xinyi Tao, Yucheng Chen, Chunxiao Zhang, Ling Wang, Kangle Lu, Xueshan Li, Kai Song, Jianfeng Chen, Youping Xie","doi":"10.1111/jpy.70165","DOIUrl":"https://doi.org/10.1111/jpy.70165","url":null,"abstract":"PII protein is widely acknowledged to regulate intracellular nitrogen and carbon metabolism by interacting with several crucial proteins. N-acetyl-L-glutamate kinase (NAGK), a rate-limiting enzyme for arginine biosynthesis, is regarded as a potential target of PII protein. Nevertheless, the regulatory function remains ambiguous in green algae and has not been investigated in Haematococcus pluvialis. In this study, the NAGK enzyme and PII protein of H. pluvialis (designated as HpNAGK and HpPII, respectively) and their interaction relationships were characterized. The results indicated that HpNAGK showed high similarity with the same enzyme in the green algae. A subcellular localization assay indicated that both HpPII and HpNAGK were located in the chloroplasts. Yeast two-hybrid, pull-down, and bimolecular fluorescence complementation assays distinctly verified the interaction between HpPII and HpNAGK, which occurs in the chloroplasts. The structure of the HpPII-HpNAGK complex was predicted through docking analysis. Moreover, the HpNAGK activity was significantly enhanced by HpPII in the presence of glutamine in vitro. Under nitrogen starvation, HpNAGK activity declined in vivo, concomitant with a reduction in arginine accumulation. The regulatory function of HpPII on HpNAGK activity aligned with that in Chlamydomonas reinhardtii but differed from that in Dunaliella salina, suggesting species specificity among green algae. These findings provide insights into the regulatory function of PII protein in green algae and help to unveil the response mechanisms of H. pluvialis to different nitrogen statuses.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147717068","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 unique sessile loricate euglenid, Lepocinclis loricata sp. nov. (Euglenophyta, Phacaceae), from South Africa: Evolutionary implications. 来自南非的一种独特的无柄裸藻，Lepocinclis loricata sp. nov.（裸藻科）：进化意义。

IF 3.4 3区生物学

Journal of Phycology Pub Date : 2026-04-15 DOI: 10.1111/jpy.70163

Bożena Zakryś, Sanet Janse van Vuuren, Aleksandra Kluczek, Maja Łukomska-Kowalczyk

{"title":"A unique sessile loricate euglenid, Lepocinclis loricata sp. nov. (Euglenophyta, Phacaceae), from South Africa: Evolutionary implications.","authors":"Bożena Zakryś, Sanet Janse van Vuuren, Aleksandra Kluczek, Maja Łukomska-Kowalczyk","doi":"10.1111/jpy.70163","DOIUrl":"https://doi.org/10.1111/jpy.70163","url":null,"abstract":"In this paper, we describe Lepocinclis loricata sp. nov. (Phacaceae), a sessile loricate euglenid that differs from all known loricate taxa by its unique combination of the presence of a lorica, monad morphology, sessile habit, and phylogenetic position within the Phacaceae. Populations of this species inhabit two turbid, silt-rich waterbodies, namely an artificial impoundment in the Western Cape Province and a natural, small river in the Free State Province, South Africa. The cylindrical, transparent loricae of L. loricata sp. nov. are attached to fine clay and silt particles suspended in the water column. Each lorica encloses a rigid, spindle-shaped monad containing numerous chloroplasts without pyrenoids and two large, rod-like paramylon grains. Phylogenetic analyses place L. loricata sp. nov. within the Lepocinclis clade, representing a loricate euglenid identified in the family Phacaceae. This discovery provides new insight into the diversification and adaptive evolution of photosynthetic euglenids and the independent emergence of sessility within the group.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":""},"PeriodicalIF":3.4,"publicationDate":"2026-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147690793","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

Contrasting patterns of population structure in two habitat-forming kelp species in southeastern Australia. 澳大利亚东南部两种生境形成型海带种群结构的对比模式。

IF 3.4 3区生物学

Journal of Phycology Pub Date : 2026-04-01 Epub Date: 2026-03-03 DOI: 10.1111/jpy.70140

Finn J Ryder, William S Pearman, Cayne Layton, Elahe Parvizi, Craig Johnson, Alecia Bellgrove, Ceridwen I Fraser

{"title":"Contrasting patterns of population structure in two habitat-forming kelp species in southeastern Australia.","authors":"Finn J Ryder, William S Pearman, Cayne Layton, Elahe Parvizi, Craig Johnson, Alecia Bellgrove, Ceridwen I Fraser","doi":"10.1111/jpy.70140","DOIUrl":"10.1111/jpy.70140","url":null,"abstract":"The distribution and connectivity of species around the globe are changing at a rapid pace. Increasing sea temperatures are a driving factor of changes in temperate macroalgal distributions. Southeast Australia is considered a global ocean-warming hotspot, where macroalgal populations are predicted to decline significantly by 2100. We used genotyping by sequencing and Lagrangian particle modeling to compare the genetic population structure and connectivity of two habitat-forming macroalgae, Macrocystis pyrifera and Durvillaea potatorum, in southeastern Australia. Both species showed regional population structures, although this was greatest in D. potatorum, as which populations showed greater dissimilarity than in M. pyrifera. Particle modeling suggested that self-recruitment and connectivity among populations were highest in northeast Tasmania for both species, with particles often stranding along the nearby coast. Intriguingly, the southernmost M. pyrifera population in Tasmania shared more recent ancestry with a mainland Australia population. Although uncommon, simulations indicated that it is possible for rafts of M. pyrifera from mainland Australia to reach far-southern Tasmania. Hindcast simulations indicated those rafts are likely to come from mainland Australia via the Zeehan Current and along the western Tasmanian coast; unsampled western Tasmanian populations might therefore also share close ancestry with western mainland populations. With genetically distinct populations and low connectivity among areas, southeastern Australian kelp populations are vulnerable to losses of genetic diversity. This study provides insights into contemporary population structure and connectivity processes in two kelp species that form important habitats for biodiversity and fisheries on the Great Southern Reef and which are both undergoing range contractions with rapid environmental change.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":"412-426"},"PeriodicalIF":3.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13103697/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147344483","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

Host, substrate, and vertical position variations in microalgal communities on mangrove pneumatophores. 红树林肺藻微藻群落的寄主、底物和垂直位置变化。

IF 3.4 3区生物学

Journal of Phycology Pub Date : 2026-04-01 Epub Date: 2026-03-19 DOI: 10.1111/jpy.70154

Kaze King-Yip Lai, Fenglan Li, Nora Fung-Yee Tam, Luzhen Chen, Steven Jing-Liang Xu, Haichao Zhou, Kit-Ling Lam, Emily Sze-Wan Wong, Fred Wang-Fat Lee

{"title":"Host, substrate, and vertical position variations in microalgal communities on mangrove pneumatophores.","authors":"Kaze King-Yip Lai, Fenglan Li, Nora Fung-Yee Tam, Luzhen Chen, Steven Jing-Liang Xu, Haichao Zhou, Kit-Ling Lam, Emily Sze-Wan Wong, Fred Wang-Fat Lee","doi":"10.1111/jpy.70154","DOIUrl":"10.1111/jpy.70154","url":null,"abstract":"Mangrove pneumatophores provide unique habitats for algal assemblages, but previous research has mainly focused on macroalgae rather than microalgae. The variations among plant species and substrates on pneumatophores have also seldom been studied. The present study aimed to compare epiphytic microalgal communities on two substrates (adhered soil and pneumatophore itself) and two vertical segments (upper and lower) of pneumatophores in three mangrove species. Epiphytic microalgae varied between substrates and segments, with higher abundances in adhered soil than on pneumatophore itself and higher species richness on the lower than on the upper segment along a pneumatophore. The distribution of microalgal species differed between segments, with Ankistrodesmus spiralis exclusively observed on the upper segment of pneumatophore itself, although Oscillatoria was generally the most abundant genus in all microhabitats. On both substrates and segments, the diversity of microalgae in Sonneratia caseolaris was higher than that in Avicennia marina and S. apetala, with enriched Nitzschia sigma in S. caseolaris but Hydrosera sp. in A. marina. Water content and salinity were the most critical physicochemical factors affecting the overall microalgal community in adhered soil and on pneumatophore itself, respectively. An increase in salinity in adhered soil enhanced microalgal diversity and favored the growth of Nitzschia in both substrates. These results reveal that pneumatophores provide diverse microhabitats for epiphytic microalgae to colonize, with significant variations in compositions between substrates, vertical positions, and mangrove plant species, whereas the key environmental factors shaping the microalgal community were substrate specific.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":"623-642"},"PeriodicalIF":3.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147481063","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

Increased prey choice is associated with higher kleptoplastidic reliance in Mesodinium ciliates. 增加的猎物选择与中观纤毛虫对眼睑增生的依赖有关。

IF 3.4 3区生物学

Journal of Phycology Pub Date : 2026-04-01 Epub Date: 2026-03-31 DOI: 10.1111/jpy.70161

Amelie L'Etoile-Goga, Holly V Moeller

{"title":"Increased prey choice is associated with higher kleptoplastidic reliance in Mesodinium ciliates.","authors":"Amelie L'Etoile-Goga, Holly V Moeller","doi":"10.1111/jpy.70161","DOIUrl":"10.1111/jpy.70161","url":null,"abstract":"Kleptoplastidic organisms display varying levels of reliance on stolen plastids, with some lineages evolving complex strategies for plastid (and other organelle) integration into metabolism. More complex methods of plastid integration typically coincide with greater prey specialization, but it remains unclear whether or how kleptoplastidic lineages preferentially obtain organelles from compatible prey types. Here, we used the Mesodinium genus of ciliates, which span a gradient of reliance on kleptoplasty, to test for prey specialization during ingestion. We used two Mesodinum species: a highly kleptoplastidic species, M. rubrum, and a more mixotrophic species, M. chamaeleon. We conducted a series of experiments offering Mesodinium two different cryptophyte prey species simultaneously. Mesodinium and cryptophyte prey populations were measured across six different prey combinations. We observed that M. rubrum showed greater prey selectivity than M. chamaeleon at the time of ingestion. Despite this greater selectivity, M. rubrum was still unable to completely select for compatible prey types during feeding. Growth of M. rubrum was not affected by prey type over the course of this study, while limited effects on the growth of M. chamaeleon were seen. Preferential feeding by M. rubrum suggests the presence of a prey identification system that is not present in M. chamaeleon, consistent with our hypothesis that prey selectivity increases with increased reliance on kleptoplasty.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":"703-714"},"PeriodicalIF":3.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13103709/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147581522","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

Narrow thermal range restricts fertilization and early growth in the habitat-forming seaweed Durvillaea potatorum (Phaeophyceae)-Implications for aquaculture and climate resilience. 狭窄的热范围限制了生境形成海藻的受精和早期生长——对水产养殖和气候适应能力的影响。

IF 3.4 3区生物学

Journal of Phycology Pub Date : 2026-04-01 Epub Date: 2026-03-03 DOI: 10.1111/jpy.70147

Vincent H S Yap, Wouter Visch, Catriona L Hurd, Jeffrey T Wright

{"title":"Narrow thermal range restricts fertilization and early growth in the habitat-forming seaweed Durvillaea potatorum (Phaeophyceae)-Implications for aquaculture and climate resilience.","authors":"Vincent H S Yap, Wouter Visch, Catriona L Hurd, Jeffrey T Wright","doi":"10.1111/jpy.70147","DOIUrl":"10.1111/jpy.70147","url":null,"abstract":"The southern bull kelp Durvillaea potatorum is a key habitat-forming macroalga in southeastern Australia and has been identified as a species of interest for sustainable seaweed aquaculture. However, the species is threatened by rising ocean temperatures and other anthropogenic factors. Assessing the thermal limits across different life stages of D. potatorum is therefore crucial for understanding its response to warming and optimizing future aquaculture practices. Using a full two-factorial design, we tested the effects of a wide range of temperatures (~3.5-30.0°C) and two light regimes (zero/low light: 0/~40, and high light: ~120 μmol photons · m-2 · s-1) on the reproductive and early life stages of D. potatorum from Eaglehawk Neck, Tasmania. Gamete release, fertilization, and early growth after 15 min, 24 h, and 7 days, respectively, were assessed. Thermal performance curves revealed that fertilization was the most thermally sensitive stage, exhibiting the lowest thermal optimum (Topt = ~12.85°C), and narrowest thermal breadth (Tbr = ~2.5°C) independent of light conditions. Temperature and light had little to no effects on egg and sperm release, whereas early germling growth exhibited thermal optima of 16.33 and 14.50°C under low and high light treatments, respectively. These results indicate that fertilization conditions need to be closely monitored during the hatchery phase of aquaculture. In addition, natural D. potatorum populations may become increasingly susceptible to ocean warming due to impaired fertilization, potentially leading to demographic shifts and range contractions toward cooler waters.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":"556-567"},"PeriodicalIF":3.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13103692/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147344491","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

Influence of prey concentration, light intensity, and temperature on the growth and ingestion of the mixotrophic dinoflagellate Pyrophacus horologium, a predator of the harmful species Heterocapsa niei. 猎物浓度、光照强度和温度对混合营养型双鞭毛藻（一种有害物种）的生长和摄食的影响。

IF 3.4 3区生物学

Journal of Phycology Pub Date : 2026-04-01 Epub Date: 2026-03-16 DOI: 10.1111/jpy.70150

Min-Jun Seong, Kun-Woo Yun, Hwa-Seong Son, Seung-Min Lee, Mu-Chan Kim

{"title":"Influence of prey concentration, light intensity, and temperature on the growth and ingestion of the mixotrophic dinoflagellate Pyrophacus horologium, a predator of the harmful species Heterocapsa niei.","authors":"Min-Jun Seong, Kun-Woo Yun, Hwa-Seong Son, Seung-Min Lee, Mu-Chan Kim","doi":"10.1111/jpy.70150","DOIUrl":"10.1111/jpy.70150","url":null,"abstract":"Pyrophacus horologium belongs to the family Pyrocystaceae and was recently identified as a mixotrophic dinoflagellate capable of feeding on other dinoflagellates. In this study, the growth and feeding responses of P. horologium were investigated under various environmental conditions by providing Heterocapsa niei, its preferred prey. The mixotrophic growth rate was measured in a feed concentration range of approximately 350 to 35,000 cells · mL-1, reaching saturation at approximately 8343 cells · mL-1. In the temperature experiment conducted under mixotrophic conditions (10-35°C at 90 μmol photons · m-2 · s-1), positive growth was observed between 15 and 32°C, with the maximum mixotrophic growth rate of 0.48 · day-1 recorded at 30°C (at 90 μmol photons · m-2 · s-1). In the light intensity experiment conducted under mixotrophic conditions (0-348 μmol photons · m-2 · s-1 at 30°C), positive growth was observed between 24 and 170 μmol photons · m-2 · s-1, with the maximum mixotrophic growth rate of 0.38 · day-1 at 120 μmol photons · m-2 · s-1 (at 30°C). The maximum ingestion rates observed were 30.2 cells · predator-1 · day-1 (at 28°C and 90 μmol photons · m-2 · s-1) and 28.5 cells · predator-1 · day-1 (at 30°C and 120 μmol photons · m-2 · s-1). The result indicate that growth rates were significantly affected by temperature and light intensity. Collectively, these results provide insights into the environmental adaptability of P. horologium and its potential ecological implications, enhancing our understanding of mixotrophic dinoflagellates that graze on the harmful species H. niei.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":"606-622"},"PeriodicalIF":3.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13103703/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147468468","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

DNA sequencing of type material of Polyopes constrictus and Dermocorynus occidentalis (Halymeniales, Rhodophyta) supports Polyopes capensis sp. nov. and Polyopes occidentalis (Hollenberg) comb. nov. 缢蛏（Polyopes constrictus）和西皮冠蝇（Dermocorynus occidentalis）的类型材料的DNA测序支持Polyopes capensis sp. 11和Polyopes occidentalis (Hollenberg) comb.。11月。

IF 3.4 3区生物学

Journal of Phycology Pub Date : 2026-04-01 Epub Date: 2026-03-20 DOI: 10.1111/jpy.70153

Jeffery R Hughey, Frederik Leliaert, Olivier De Clerck, Paul W Gabrielson

{"title":"DNA sequencing of type material of Polyopes constrictus and Dermocorynus occidentalis (Halymeniales, Rhodophyta) supports Polyopes capensis sp. nov. and Polyopes occidentalis (Hollenberg) comb. nov.","authors":"Jeffery R Hughey, Frederik Leliaert, Olivier De Clerck, Paul W Gabrielson","doi":"10.1111/jpy.70153","DOIUrl":"10.1111/jpy.70153","url":null,"abstract":"Characterized by its expansive crust, short upright blades, and reproductive structures characteristic of Halymeniaceae, the northeast Pacific species Dermocorynus occidentalis was originally classified in that genus with the morphologically similar generitype, D. montagnei. To determine if the generic placement of D. occidentalis was correct, four short rbcL gene amplicons from one of two syntype specimens of D. occidentalis, Hollenberg #650, were sequenced yielding 722 base pairs. The sequenced specimen is herein designated as the lectotype of D. occidentalis. A phylogenetic analysis of this and other rbcL gene sequences of selected Halymeniales, which included the generitype species of Dermocorynus, D. montagnei, fully resolved D. occidentalis in a clade with nine Polyopes spp. This clade included a complete rbcL gene sequence obtained from one of the specimens on the lectotype sheet of Fucus constrictus, the basionym of P. constrictus, the generitype of Polyopes from Australia. We also present the complete mitochondrial and plastid genomes obtained from the P. constrictus lectotype. These results support the transfer of D. occidentalis to Polyopes as P. occidentalis (Hollenberg) comb. nov. In addition, specimens identified as P. constrictus from South Africa were resolved in a clade well separated from the Australian P. constrictus. Consequently, we describe the South African specimens as Polyopes capensis sp. nov.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":"732-744"},"PeriodicalIF":3.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147490804","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

Bioluminescence of the heterotrophic dinoflagellate Polykrikos kofoidii Chatton 1914 (Dinophyceae). 异养甲藻Polykrikos kofoidii Chatton 1914（甲藻科）的生物发光。

IF 3.4 3区生物学

Journal of Phycology Pub Date : 2026-04-01 Epub Date: 2026-03-31 DOI: 10.1111/jpy.70157

Michael I Latz, Dimitri D Deheyn, Brittany N Sprecher

{"title":"Bioluminescence of the heterotrophic dinoflagellate Polykrikos kofoidii Chatton 1914 (Dinophyceae).","authors":"Michael I Latz, Dimitri D Deheyn, Brittany N Sprecher","doi":"10.1111/jpy.70157","DOIUrl":"10.1111/jpy.70157","url":null,"abstract":"Heterotrophic dinoflagellates are important predators of phytoplankton, and many species produce bioluminescence, which is thought to serve as an antipredator function. The present study investigated the bioluminescence of the heterotrophic dinoflagellate Polykrikos kofoidii, an important predator of toxic and bloom-forming dinoflagellates. Its flashes were slow and dim compared to those of other dinoflagellates but with a similar spectral emission. Based on hyperspectral and laser confocal microscopy, autofluorescence consistent with that of luciferin was distributed throughout the cell, with only a few punctate sources typical of scintillons from other luminescent dinoflagellates. Polykrikos kofoidii consumed whole prey, which initially remained intact with measurable autofluorescence of chlorophyll, if plastid-containing, and luciferin, if luminescent. Polykrikos kofoidii encoded a luciferase gene with three conserved catalytic domains with an N-terminal region that appeared to contain a luciferin-binding protein-like motif. In three of the nine publicly available P. kofoidii transcriptomes, a luciferin-binding protein with homology to Noctiluca scintillans hybrid luciferase-luciferin binding domain was detected. The slow and dim flashes of P. kofoidii resulted in a bioluminescence signature that was distinct from other luminescent dinoflagellates, whereas the diffuse cellular distribution of luciferin fluorescence was unlike the punctate scintillon emission observed in previously studied luminescent dinoflagellates. This suggests that the cellular regulation of luciferin in P. kofoidii may differ from that of other dinoflagellates.","PeriodicalId":16831,"journal":{"name":"Journal of Phycology","volume":" ","pages":"666-688"},"PeriodicalIF":3.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13103706/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147581571","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