Phycological Research最新文献_第8页

Novelties in nomenclature and typification appearing in Phycological Research 70 (2) 生理学研究70(2)中出现的命名法和类型学的新奇之处

IF 1.5 4区生物学

Phycological Research Pub Date : 2022-04-01 DOI: 10.1111/pre.12484

引用次数: 0

New information about the toxicological profile of Prorocentrum panamense (Prorocentrales, Dinophyceae) and its global distribution 关于巴拿马原心菌(原心菌，恐龙科)毒理学特征及其全球分布的新资料

IF 1.5 4区生物学

Phycological Research Pub Date : 2022-04-01 DOI: 10.1111/pre.12479

G. Gaiani, M. Rey, À. Tudó, M. Rambla, J. Diogène, M. Campàs, C. Alcaraz

{"title":"New information about the toxicological profile of Prorocentrum panamense (Prorocentrales, Dinophyceae) and its global distribution","authors":"G. Gaiani, M. Rey, À. Tudó, M. Rambla, J. Diogène, M. Campàs, C. Alcaraz","doi":"10.1111/pre.12479","DOIUrl":"https://doi.org/10.1111/pre.12479","url":null,"abstract":"Dinoflagellates of the genera Prorocentrum and Dinophysis are known producers of toxic compounds belonging to the okadaic acid (OA) group. The ingestion of shellfish contaminated with these toxins causes a human disease named diarrheic shellfish poisoning (DSP). In this study, the first record of Prorocentrum panamense, a potential toxin‐producer species, was reported in the Canary Islands together with its toxicological characterization. Prorocentrum panamense cells were collected during April 2017 from natural pools located in the Northeastern part of Gran Canaria. This new record represents an expansion of P. panamense distribution area, previously restricted to the Pacific Ocean, Indian Ocean, Arabian Gulf and the Caribbean, and its introduction mechanisms are discussed. Laboratory cultures of P. panamense were settled and toxin production was assessed in both cell pellets and culture media at four different growth phases (latency, exponential, early stationary and late stationary) implementing LC‐MS/MS and neuro‐2a cell‐based assay (CBA). LC‐MS/MS allowed the identification of OA in the fraction corresponding to the late stationary phase, and tests performed on neuro‐2a cells showed, for most of the fractions, OA‐like activity observable by both cell morphology changes and cell mortality. This information is fundamental for a better understanding of the genus Prorocentrum global distribution, its ecology, and risks associated to toxic producing species.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44172645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 1

Application of chemostat culture to nutrient uptake rate measurements by the macroalgae Saccharina japonica var. religiosa (Phaeophyceae) and Ulva australis (Ulvophyceae) 恒化培养在大藻(褐藻科)和大藻(紫藻科)对营养物吸收率测定中的应用

IF 1.5 4区生物学

Phycological Research Pub Date : 2022-03-30 DOI: 10.1111/pre.12483

Ryosuke Okazaki, Narumi Teramoto, A. Carlson, Kiyoko Nakanishi, I. Kudo

{"title":"Application of chemostat culture to nutrient uptake rate measurements by the macroalgae Saccharina japonica var. religiosa (Phaeophyceae) and Ulva australis (Ulvophyceae)","authors":"Ryosuke Okazaki, Narumi Teramoto, A. Carlson, Kiyoko Nakanishi, I. Kudo","doi":"10.1111/pre.12483","DOIUrl":"https://doi.org/10.1111/pre.12483","url":null,"abstract":"In this study, we applied a chemostat culture method, for the first time, to measure the nutrient uptake rate of macroalgae. We examined two methods of measuring the nutrient uptake rate of two macroalgae, Saccharina japonica var. religiosa and Ulva australis, by comparing nutrient uptake kinetics between the chemostat culture and batch culture. In the chemostat culture, the nutrient concentration was kept constant by monitoring the change in nutrient concentration using an Auto Analyzer in real time and adding nutrients to compensate for the macroalgae's nutrient consumption. The nutrient uptake in the chemostat culture could be best fitted to the Michaelis–Menten saturation kinetics. In the batch culture, the nutrient concentration decreased with time, either constantly or exponentially due to a rapid uptake of nutrients by the macroalgae. The nutrient uptake rate in the batch culture generally showed a scattered relationship with nutrient concentration, with a weak fitting to the Michaelis–Menten saturation kinetics. This discrepancy seemed to be partly because the change in nutrient concentration was large between the sampling intervals in the batch culture. Determining an appropriate sampling interval for detectable concentration change is difficult unless the nutrient concentration is measured in real time. Therefore, the application of the chemostat culture method to the measurement of the uptake rate by macroalgae could greatly improve our understanding of nutrient uptake kinetics.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48712132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Revealing the species diversity of Neolyngbya (Cyanobacteria, Oscillatoriales) from subtropical coastal regions of Okinawa, Japan, with descriptions of Neolyngbya intertidalis sp. nov. and Neolyngbya latusa sp. nov. 以日本冲绳亚热带沿海地区neolyynbya intertidalis sp. 11和neolyynbya latusa sp. 11为例，揭示了neolyynbya的物种多样性。

IF 1.5 4区生物学

Phycological Research Pub Date : 2022-03-01 DOI: 10.1111/pre.12482

H. Nuryadi, S. Suda

{"title":"Revealing the species diversity of Neolyngbya (Cyanobacteria, Oscillatoriales) from subtropical coastal regions of Okinawa, Japan, with descriptions of Neolyngbya intertidalis sp. nov. and Neolyngbya latusa sp. nov.","authors":"H. Nuryadi, S. Suda","doi":"10.1111/pre.12482","DOIUrl":"https://doi.org/10.1111/pre.12482","url":null,"abstract":"Okinawan coasts are a rich source of biodiversity, including of filamentous cyanobacteria, owing to their habitat diversity created by coral reefs. Along the coastlines of Okinawa, several undescribed species, including those from Neolyngbya, remain unexplored. In this study, two undescribed cyanobacterial species with morphological resemblance to Neolyngbya were identified using a polyphasic approach. Both taxa had morphological features similar to known species of Neolyngbya; however, the cell size and thallus shape were different. Phylogenetic analyses of the 16S rRNA gene and the 16S‐23S rRNA internal transcribed spacer (ITS) region showed that the two new species formed a highly supported independent subclade within Neolyngbya. Accordingly, three informative domains of the ITS region (D1‐D1′, Box B and V3) also presented distinct secondary structures compared to previously described species of Neolyngbya, both in structure form and configuration. Overall, analyses of morphology and phylogeny of the 16S rRNA gene and the 16S‐23S rRNA ITS region, as well as the secondary structures of ITS region, supported the proposal of two new species within Neolyngbya. Herein, we propose N. intertidalis sp. nov. and N. latusa sp. nov. as new members of Neolyngbya under the provisions of the International Code of Nomenclature for Algae, Fungi and Plants (ICN).","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42096840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 2

The effects of desiccation and salinity gradients in the PSII photochemical efficiency of a subtidal brown alga, Saccharina japonica (Laminariales) from Hokkaido, Japan 干燥和盐度梯度对日本北海道潮下褐藻Saccharina japonica（Laminariales）PSII光化学效率的影响

IF 1.5 4区生物学

Phycological Research Pub Date : 2022-02-28 DOI: 10.1111/pre.12481

Aoi Shindo, Gregory N. Nishihara, I. A. Borlongan, Ryuta Terada

{"title":"The effects of desiccation and salinity gradients in the PSII photochemical efficiency of a subtidal brown alga, Saccharina japonica (Laminariales) from Hokkaido, Japan","authors":"Aoi Shindo, Gregory N. Nishihara, I. A. Borlongan, Ryuta Terada","doi":"10.1111/pre.12481","DOIUrl":"https://doi.org/10.1111/pre.12481","url":null,"abstract":"We determined the response of photochemical efficiency to desiccation and salinity in an edible brown alga, Saccharina japonica (var. japonica), using a pulse amplitude modulation chlorophyll fluorometer. Natural populations of this species in Muroran, Hokkaido, Japan are most of the time immersed in the subtidal zone; however, those at the uppermost part of the sublittoral are sometimes emersed during low tide. In the laboratory experiment, the alga under aerial exposure up to 8 h under dim light at 20°C and 50% humidity showed that the effective quantum yields (ΔF/Fm′) of Photosystem II quickly declined after more than 45 min of emersion; ΔF/Fm′ also failed to recover to the initial level even after 1 day of rehydration in seawater. Under emersion, the ΔF/Fm′ values were relatively stable and above 0.5 when the absolute water content (AWC, %) was greater than 50%; however, it declined as the AWC decreased. Once the algae were dehydrated to an AWC of less than 50%, their ΔF/Fm′ did not return to the initial level despite subsequent reimmersion in seawater, suggesting the low ability of photosynthetic recovery from dehydration. Results of in situ measurements in Muroran showed that the ΔF/Fm′ of S. japonica declined during the tidal exposure; however, it recovered after they were again immersed in seawater due to the rising tide. Furthermore, S. japonica showed a stenohaline photosynthetic response between 20 and 40 psu, as their ΔF/Fm′ values were found to be unchanged in these salinities after 5 days of laboratory culture; this suggests the seaweed’s photosynthetic tolerance and/or acclimation within such a relatively narrow range, which might be one of the traits that preclude its occurrence in the intertidal and brackish waters. Indeed, desiccation risk and fluctuating salinity are important limiting factors that influence the stability of kelp beds for sustainable utilization in the regional fishery including mariculture of this species.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48962806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 4

Wave exposure, shore level, and season of clearing modulate early algal abundance and succession in an intertidal zone 波浪暴露、海岸水平和清理季节调节潮间带早期藻类的丰度和演替

IF 1.5 4区生物学

Phycological Research Pub Date : 2022-02-16 DOI: 10.1111/pre.12480

J. Mayakun, A. Prathep, Jeong Ha Kim

{"title":"Wave exposure, shore level, and season of clearing modulate early algal abundance and succession in an intertidal zone","authors":"J. Mayakun, A. Prathep, Jeong Ha Kim","doi":"10.1111/pre.12480","DOIUrl":"https://doi.org/10.1111/pre.12480","url":null,"abstract":"Zonation patterns and the structure of intertidal communities are controlled by tidal conditions. Algal diversity, abundance and succession were experimentally tested under different degrees of wave exposure, shore level, and season of clearing at the intertidal zone, Phuket, Thailand. Dead coral patches colonized by algae (20 cm × 20 cm) were cleared at upper, middle, and lower shore levels on sheltered and semi‐exposed shores during both the dry and rainy seasons. Of 17 algal species, including eight Rhodophyta, eight Chlorophyta, and one Phaeophyceae that were recruited on the cleared plots, three species were dominant: Ulva paradoxa, Padina in the Vaughaniella stage, and Polysiphonia sphaerocarpa. Algal diversity on the semi‐exposed shore was higher than on the sheltered shore. In the successional process, U. paradoxa extensively recruited and persisted longer on plots cleared at the middle shore level on the semi‐exposed shores than at the other. It showed a greater abundance in the plots cleared in the rainy season than those cleared in the dry season. Ulva paradoxa persisted for around 5 to 6 months after clearing and was then replaced by the two later species, Padina in the Vaughaniella stage and P. sphaerocarpa. Ulva paradoxa settled more easily and persisted longer at the cleared plots than other algal species because of its opportunistic characteristics and a special physiological adaptation to long periods of emersion. From this study, degree of wave exposure, shore level, and season of clearing likely play important roles in algal recruitment, abundance, and succession patterns.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49395898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 new red alga from Japan, Dasya japonovillosa sp. nov. (Delesseriaceae, Ceramiales) 一种新的日本红藻，日本红藻Dasya japonovillosa sp.nov.（Delesseriaceae，Ceramiales）

IF 1.5 4区生物学

Phycological Research Pub Date : 2022-01-10 DOI: 10.1111/pre.12477

Y. Yamagishi, K. Kogame, M. Masuda

引用次数: 2

Novelties in nomenclature and typification appearing in Phycological Research 70 (1) 《植物生态学研究》70（1）

IF 1.5 4区生物学

Phycological Research Pub Date : 2022-01-01 DOI: 10.1111/pre.12474

引用次数: 0

Issue Information 问题信息

IF 1.5 4区生物学

Phycological Research Pub Date : 2022-01-01 DOI: 10.1111/pre.12475

引用次数: 0

Sterols of the ‘dinotom’ Durinskia baltica (Dinophyceae) are of dinoflagellate origin ' dinotom ' Durinskia baltica (Dinophyceae)的固醇是起源于鞭毛动物

IF 1.5 4区生物学

Phycological Research Pub Date : 2021-11-23 DOI: 10.1111/pre.12473

Jeffrey D. Leblond, Stephanie L. Vandergrift

{"title":"Sterols of the ‘dinotom’ Durinskia baltica (Dinophyceae) are of dinoflagellate origin","authors":"Jeffrey D. Leblond, Stephanie L. Vandergrift","doi":"10.1111/pre.12473","DOIUrl":"https://doi.org/10.1111/pre.12473","url":null,"abstract":"‘Dinotoms’ are a relatively small group of dinoflagellates with aberrant tertiary plastids of diatom origin, thus differing from the majority of photosynthetic dinoflagellates which possess the carotenoid pigment peridinin and have secondary plastids of red algal origin. As part of our laboratory's continuing efforts to examine such unusual dinoflagellates in the search for clues to the evolution of their lipid compositions, we have examined the sterol composition of the dinotom Durinskia baltica. As such, we here compared its sterols to those of the previously examined dinotom, Kryptoperidinium foliaceum, more broadly to other photosynthetic, peridinin‐containing dinoflagellates, and to the diatom genus Nitzschia, which is the presumed ancestor of the D. baltica dinotom plastid. Sterols are ringed lipids, common to eukaryotes, thought to reinforce phospholipid bilayers. Many peridinin‐containing dinoflagellates have sterol compositions which are enriched by the presence of cholesterol (cholest‐5‐en‐3β‐ol) and 4α‐methyl‐substituted sterols such as dinosterol (4α,23,24‐trimethyl‐5α‐cholest‐22E‐en‐3β‐ol); this has also been found to be true for K. foliaceum despite its aberrant plastid ancestry. Our objective was to determine if this is also true for D. baltica as only the second dinotom to have its sterols characterized in detail, and to determine if there is any indication of prominent sterols which are uncommon to dinoflagellates, possibly originating from the diatom endosymbiont, as has been demonstrated previously with K. foliaceum and D. baltica chloroplast‐associated galactolipids of clear diatom origin. Our results demonstrate that like K. foliaceum, the major sterols of D. baltica are cholesterol, dinosterol, and other 4α‐methyl‐substituted sterols common to dinoflagellates. Although there were a number of minor sterols, none were found with obvious origin from the diatom endosymbiont, indicating that most originated with the dinoflagellate host itself, most likely before acquisition of the diatom tertiary plastid.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44751097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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: 3