Phycological Research最新文献_第10页

Watanabea green microalgae (Trebouxiophyceae) inhabiting lichen holobiomes: Watanabea lichenicola sp. nova 居住在地衣群落中的Watanabea绿微藻(Trebouxiophyceae); Watanabea lichenicola sp. nova

IF 1.5 4区生物学

Phycological Research Pub Date : 2021-07-12 DOI: 10.1111/pre.12463

S. Chiva, C. Dumitru, C. Bordenave, E. Barreno

{"title":"Watanabea green microalgae (Trebouxiophyceae) inhabiting lichen holobiomes: Watanabea lichenicola sp. nova","authors":"S. Chiva, C. Dumitru, C. Bordenave, E. Barreno","doi":"10.1111/pre.12463","DOIUrl":"https://doi.org/10.1111/pre.12463","url":null,"abstract":"Microalgae of the genus Watanabea are widely distributed as free living in soil/subaerial and aquatic habitats. In this study, two Watanabea spp. were isolated from lichen thalli of Buellia zoharyi collected on biocrusts in the Iberian Peninsula and the Canary Islands. To ascertain their taxonomic position and phylogenetic relationships within the genus Watanabea, morphological observations were performed using light and confocal microscopy, combined with molecular analyses based on the phylogeny of small subunit ribosomal region (SSU) and internal transcribed spacer region (ITS) genes and the ITS2 secondary structure. One isolate matches Watanabea acidophila, and the other, which has not been previously reported, is described here as Watanabea lichenicola sp. nov. Both molecular phylogenetic analyses (SSU and ITS) suggest the division of the Watanabea spp. into two well‐supported clades: Watanabea group I and Watanabea group II, to which W. lichenicola and W. acidophila belong, respectively. Furthermore, an exclusive side loop in helix 3 of the ITS2 secondary structure of Watanabea group II reinforces the use of this analysis as a molecular hallmark for this genus. The integrative approaches carried out in this study suggest lichen thalli as a new ecological niche for this genus, either as associated (not primary symbiont), epiphyte and/or endophyte microalgae in Buellia zoharyi holobionts.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/pre.12463","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48854048","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: 5

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IF 1.5 4区生物学

Phycological Research Pub Date : 2021-07-01 DOI: 10.1111/pre.12428

引用次数: 0

Sexual processes and life cycle transitions of the tropical Pacific Alexandrium minutum (Dinophyceae) 热带太平洋微小亚历山大藻的性过程和生命周期转变

IF 1.5 4区生物学

Phycological Research Pub Date : 2021-07-01 DOI: 10.1111/pre.12460

G. Liow, W. Lau, Ing Kuo Law, H. Gu, C. Leaw, P. Lim

{"title":"Sexual processes and life cycle transitions of the tropical Pacific Alexandrium minutum (Dinophyceae)","authors":"G. Liow, W. Lau, Ing Kuo Law, H. Gu, C. Leaw, P. Lim","doi":"10.1111/pre.12460","DOIUrl":"https://doi.org/10.1111/pre.12460","url":null,"abstract":"Resting cysts of harmful marine dinoflagellates, including Alexandrium species, play an important role in their bloom dynamics, where massive cyst germination is regarded as the natural phenomenon that initiates blooms. The life cycle of Alexandrium minutum from the temperate region has been intensively studied, however, related studies on its tropical counterparts are scarce. In this study, sexual reproduction of a toxigenic A. minutum (tropical Pacific ribotype) was investigated in a laboratory setting. Gamete expression was observed in both compatible cross‐mating and self‐crossed cultures, but sexual induction was observed only in the compatible cross‐mating cultures, confirming the heterothallic nature of the species. Resting cysts were successfully produced in 41 out of 91 pairwise combinations of cross‐mating strains. The crossing matrix results showed that the mating system of the tropical Pacific A. minutum was complex, with at least four distinct mating groups observed. The resting cysts had a relatively shorter dormancy period (5–8 days). The rapid encystment‐excystment processes and a short cyst dormancy period in this tropical Pacific A. minutum are believed to play crucial roles in governing the bloom and its dynamics in the tropical coastal region.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/pre.12460","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42752870","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

Novelties in nomenclature and typification appearing in Phycological Research 69 (3) 《生理学研究》中出现的命名法和类型学的新奇之处69 (3)

IF 1.5 4区生物学

Phycological Research Pub Date : 2021-07-01 DOI: 10.1111/pre.12462

引用次数: 0

Characteristics of maltose transport system in the endosymbiont Chlorella variabilis of Paramecium bursaria 法氏草履虫内共生变异小球藻麦芽糖转运系统的特性

IF 1.5 4区生物学

Phycological Research Pub Date : 2021-06-02 DOI: 10.1111/pre.12461

Aika Shibata, F. Takahashi, N. Imamura, M. Kasahara

引用次数: 0

Corrigendum

IF 1.5 4区生物学

Phycological Research Pub Date : 2021-04-01 DOI: 10.1111/pre.12458

引用次数: 0

Paragymnodinium verecundum sp. nov. (Gymnodiniales, Dinophyceae), a new species of mixotrophic dinoflagellate from Japan verecundum Paraymnodinium sp.nov.（Gymnodinales，Dinophyceae），日本混合营养甲藻的一个新种

IF 1.5 4区生物学

Phycological Research Pub Date : 2021-04-01 DOI: 10.1111/pre.12452

K. Yokouchi, T. Horiguchi

{"title":"Paragymnodinium verecundum sp. nov. (Gymnodiniales, Dinophyceae), a new species of mixotrophic dinoflagellate from Japan","authors":"K. Yokouchi, T. Horiguchi","doi":"10.1111/pre.12452","DOIUrl":"https://doi.org/10.1111/pre.12452","url":null,"abstract":"Paragymnodinium verecundum Yokouchi & Horiguchi sp. nov. was isolated from sand samples collected at Kitsunezaki, Miyagi Prefecture, Japan, and described based on observations using light and scanning and transmission electron microscopy, together with molecular analysis. The cells were 9.4–17.1 μm long and 5.7–13.6 μm wide and showed a benthic lifestyle. They possessed a sulcal extension‐like furrow on the episome, an eyespot, nematocysts and multiple chloroplasts with separated thylakoids. They ingested prey cells by engulfment, indicating a mixotrophic nutrition. These characters are shared with a known species of the genus Paragymnodinium, P. stigmaticum. However, unlike P. stigmaticum, P. verecundum showed negative phototaxis and possessed a pusule. Additional differences in the ultrastructure of the nematocysts and the flagellar apparatus indicated that these two dinoflagellates are different species. A phylogenetic analysis based on concatenated 18S and 28S ribosomal DNA sequences recovered P. verecundum in a robust clade of species of Paragymnodinium within the clade Gymnodinium sensu stricto. The sister to P. verecundum was P. stigmaticum, but they were clearly separated. Therefore, this dinoflagellate was concluded to be a new species in the genus Paragymnodinium.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/pre.12452","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48888090","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

Novelties in nomenclature and typification appearing in Phycological Research 69 (2) 命名法和典型化方面的创新出现在《生态学研究》69（2）

IF 1.5 4区生物学

Phycological Research Pub Date : 2021-04-01 DOI: 10.1111/pre.12459

引用次数: 0

Taxonomic revisions based on genetic analysis of type specimens of Ulva conglobata, U. laetevirens, U. pertusa and U. spathulata (Ulvales, Chlorophyta) 基于遗传分析的石首乌、扁叶石首乌和匙形石首乌（Ulvales，Chlorophyta）模式标本分类订正

IF 1.5 4区生物学

Phycological Research Pub Date : 2021-04-01 DOI: 10.1111/pre.12450

Jeffery R. Hughey, P. Gabrielson, C. Maggs, F. Mineur, K. Miller

{"title":"Taxonomic revisions based on genetic analysis of type specimens of Ulva conglobata, U. laetevirens, U. pertusa and U. spathulata (Ulvales, Chlorophyta)","authors":"Jeffery R. Hughey, P. Gabrielson, C. Maggs, F. Mineur, K. Miller","doi":"10.1111/pre.12450","DOIUrl":"https://doi.org/10.1111/pre.12450","url":null,"abstract":"Genetic analysis of type material of various Ulva species has shown that many names have been misapplied. DNA sequences of two of the specimens on the lectotype sheet of U. australis from South Australia showed that U. australis is conspecific with specimens called U. pertusa from Japan. However, type material of U. pertusa has not been sequenced, nor have other type specimens with type localities in Japan and Australia, including U. conglobata f. conglobata and U. conglobata f. densa from the former, and U. laetevirens and U. spathulata from the latter. To determine if these names have been correctly applied, targeted DNA sequencing of the rbcL gene was performed on (i) the lectotype specimen of U. laetevirens, (ii) the lectotype and two syntype specimens of U. pertusa, (iii) the lectotype and two syntype specimens of U. congoblata f. conglobata and (iv) two specimens on the holotype sheet of U. conglobata f. densa. In addition, high‐throughput sequencing (HTS) analysis was carried out on an isotype specimen of U. spathulata. Phylogenetic analysis of the resulting rbcL gene sequences supports the taxonomic conclusions that U. laetevirens, U. pertusa and U. spathulata are synonyms of U. australis, and U. conglobata f. conglobata and U. conglobata f. densa represent a single separate and distinct species, U. conglobata. These genetic data contribute to the taxonomy of Ulva and further demonstrate that analyzing DNA from type material is the only currently known reliable method to correctly apply names in this genus.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/pre.12450","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45020486","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: 16

Issue Information 问题信息

IF 1.5 4区生物学

Phycological Research Pub Date : 2021-04-01 DOI: 10.1111/pre.12427

引用次数: 0