Phycological Research最新文献_第9页

New species Micractinium kostikovii (Chlorellaceae, Trebouxiophyceae) from Russia 俄罗斯的新种小球藻Micractinium kostikovii（小球藻科、树叶藻科）

IF 1.5 4区生物学

Phycological Research Pub Date : 2021-10-17 DOI: 10.1111/pre.12469

E. Krivina, A. Temraleeva, M. Sinetova

引用次数: 6

Issue Information 问题信息

IF 1.5 4区生物学

Phycological Research Pub Date : 2021-10-01 DOI: 10.1111/pre.12429

引用次数: 0

Novelties in nomenclature and typification appearing in Phycological Research 69 (4) 命名法和典型化方面的创新出现在《生态学研究》69（4）

IF 1.5 4区生物学

Phycological Research Pub Date : 2021-10-01 DOI: 10.1111/pre.12468

引用次数: 0

First record of Neoporphyra haitanensis (T.J.Chang & B.F.Zheng) J.Brodie & L.‐E.Yang (Bangiales, Rhodophyta) from Shikinejima Island and Hachijojima Island of the Izu Islands, southern central Japan 日本中南部伊豆列岛岛和八重岛的坛新豚（T.J.Chang&B.F.Zheng）J.Brodie&L.‐E.Yang（Bangiales，Rhodophyta）的首次记录

IF 1.5 4区生物学

Phycological Research Pub Date : 2021-10-01 DOI: 10.1111/pre.12466

F. Sano, Airi Ikeura, A. Takasugi, K. Niwa

{"title":"First record of Neoporphyra haitanensis (T.J.Chang & B.F.Zheng) J.Brodie & L.‐E.Yang (Bangiales, Rhodophyta) from Shikinejima Island and Hachijojima Island of the Izu Islands, southern central Japan","authors":"F. Sano, Airi Ikeura, A. Takasugi, K. Niwa","doi":"10.1111/pre.12466","DOIUrl":"https://doi.org/10.1111/pre.12466","url":null,"abstract":"We conducted a morphological observation and molecular phylogenetic analyses on bladed Bangiales collected from natural populations on Shikinejima Island and Hachijojima Island of the Izu Islands, southern central Japan. The morphological features of the gametophytic blades such as the blade shape, blade margin and reproductive cell divisions were extremely similar to those parameters of Neoporphyra haitanensis, a species cultivated in southern China, and Neoporphyra dentata. However, the blades collected from the two islands were thicker than the blades of N. dentata; this feature was the same as that of N. haitanensis. The chloroplast RUBISCO spacer sequences of present samples were identical to the sequences of N. haitanensis from China. Moreover, phylogenetic positions of three conchocelis strains isolated from the blades on the two islands were examined based on concatenated sequences of the chloroplast rbcL gene and nuclear 18S rRNA. The results showed that the strains were resolved in a clade including N. haitanensis; however, the strains were separated from N. haitanensis in China. Therefore, the bladed Bangiales from the two islands were identified as N. haitanensis. The present study is the first record of N. haitanensis in natural populations in Japan.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/pre.12466","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45602678","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

Seasonal variation of carrageenan yield, gel strength and viscosity in Sarcopeltis (ex Gigartina) skottsbergii from Southern Chile 智利南部斯科茨贝氏Sarcopeltis (ex Gigartina)卡拉胶产率、凝胶强度和粘度的季节变化

IF 1.5 4区生物学

Phycological Research Pub Date : 2021-09-29 DOI: 10.1111/pre.12467

R. Westermeier, Carmen González, P. Murúa, J. Morales, David J. Patiño, Natacha Fabres, Jaime Zamorano, D. Müller

{"title":"Seasonal variation of carrageenan yield, gel strength and viscosity in Sarcopeltis (ex Gigartina) skottsbergii from Southern Chile","authors":"R. Westermeier, Carmen González, P. Murúa, J. Morales, David J. Patiño, Natacha Fabres, Jaime Zamorano, D. Müller","doi":"10.1111/pre.12467","DOIUrl":"https://doi.org/10.1111/pre.12467","url":null,"abstract":"Chile is one of the top carrageenan producers worldwide, and Sarcopeltis (ex Gigartina) skottsbergii one of the topmost exploited carrageenophytes from the wild in the world. Total yield, gel strength and viscosity from two contrasting environments Calbuco and Ancud (Inner and Outer Sea, Chile) were estimated monthly in approximately 2 years for this species. While carrageenan yields did not show differences between localities, gametophytes in spring–summer had 15% higher, compared to tetrasporophytes. Sizes (frond surface) normally did not affect carrageenan yields. Gametophytes showed clear differences in gel strength between seasons, but not between localities, with maximum peaks during winter–spring months in Calbuco and autumn‐winter months in Ancud. Seasonal variations in viscosity were also significant. While gametophyte viscosity did not exceed 120 cPs, tetrasporophytes reached 1400 cPs in Calbuco and 1000 cPs in Ancud. More remarkably, a positive correlation between viscosity and gel strength was found in S. skottsbergii gametophytes, which is significantly different between both localities. These results suggest that selective harvesting in spring–summer should be preferred to optimize cost–benefit of harvesting activities and subsequent carrageenan productivity.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48693815","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

The effect of drying on undervalued brown and red seaweed species: Bioactivity alterations 干燥对被低估的褐藻和红藻的影响:生物活性的改变

IF 1.5 4区生物学

Phycological Research Pub Date : 2021-07-26 DOI: 10.1111/pre.12465

D. Julião, C. Afonso, A. Gomes‐Bispo, N. Bandarra, C. Cardoso

{"title":"The effect of drying on undervalued brown and red seaweed species: Bioactivity alterations","authors":"D. Julião, C. Afonso, A. Gomes‐Bispo, N. Bandarra, C. Cardoso","doi":"10.1111/pre.12465","DOIUrl":"https://doi.org/10.1111/pre.12465","url":null,"abstract":"The effect of drying on two brown seaweed (Treptacantha abies‐marina and Cystoseira humilis) and two red seaweed species (Asparagopsis armata and Asparagopsis taxiformis) was evaluated based on the levels of biological activity, such as antioxidant and anti‐inflammatory properties. Moreover, the contents of some significant compound classes, such as polyphenols and beta‐glucans, were determined. Seaweeds C. humilis and T. abies‐marina showed high polyphenol levels (1.76–6.78 mg gallic acid equivalents g−1 dw), which clearly exceeded those determined in the Asparagopsis genus regardless of drying process. This was partially reflected in the antioxidant activity as measured by DPPH and FRAP methods, which showed that extracts from C. humilis and T. abies‐marina in most cases had stronger antioxidant activity than those from Asparagopsis species. The influence of the drying technique upon the antioxidant activity was relatively limited, since in many instances there was no effect. Concerning anti‐inflammatory activity, in the case of shade‐dried samples, C. humilis had a higher activity (>30% COX‐2 inhibition) than A. armata. However, this activity in C. humilis was not rendered available in the upper gastrointestinal (GI) tract. Indeed, only A. taxiformis displayed anti‐inflammatory activity in the fraction available in the upper GI tract, showing an upper GI tract availability in the 90–100% range. Therefore, though bioactivity levels were higher in C. humilis and T. abies‐marina, Asparagopsis species also had substantial levels of bioactive compound. Sun‐drying produced more negative effects than shade‐drying, but these effects were not very extensive.","PeriodicalId":20544,"journal":{"name":"Phycological Research","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/pre.12465","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43312007","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

Neoporphyra kitoi sp. nov. (Bangiales, Rhodophyta) from Japan, with new blades arising from rhizoidal cells 产自日本的Neoporphyra kitoi sp. 11 . (Bangiales, rhodophya)，具有由根状细胞产生的新叶片

IF 1.5 4区生物学

Phycological Research Pub Date : 2021-07-15 DOI: 10.1111/pre.12464

Mahiko Abe, N. Kikuchi, M. Tamaki, Tomoko Sato, N. Murase, Eiji Fujiyoshi, Masahiro Kobayashi

引用次数: 6

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":" ","pages":""},"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

Issue Information 问题信息

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":" ","pages":""},"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