Biecheleria donggangensis sp. nov . (Suessiaceae, Dinophyceae), a new marine woloszynskioid species germinated from coastal sediment of the Yellow Sea, China

IF 1.5 4区 生物学 Q3 MARINE & FRESHWATER BIOLOGY Phycologia Pub Date : 2023-09-03 DOI:10.1080/00318884.2023.2273655
Yuyang Liu, Zhangxi Hu, Haifeng Gu, Zhe Tao, Yunyan Deng, Lixia Shang, Zhaoyang Chai, Ying Zhong Tang
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Abstract

ABSTRACTA new marine woloszynskioid dinoflagellate, Biecheleria donggangensis sp. nov., germinated from the sediments of Rizhao coastal area, China, was examined by light and scanning electron microscopy. Its phylogenetic position was inferred from nuclear rDNA (partial LSU, SSU and ITS1–5.8S–ITS2) sequences. Cells were spherical to ellipsoidal (8.5‒19.2 μm long and 5.9‒11.5 μm wide) with numerous small and discoid chloroplasts, and a centrally located nucleus. Scanning electron microscopy showed an apical furrow area consisting of a single elongated apical vesicle (EAV) with 20 to 34 small globular knobs at the top of the epicone, and 13–15 latitudinal series of amphiesmal vesicles (AVs). Biecheleria donggangensis can be distinguished from other congeneric species by the configuration of the AVs bordering the EAV, the number of latitudinal AVs, and the trichocyst pore (TP) structures around the EAV. Thick-walled and spherical (or oval) cysts were 16.1‒23.5 μm in diameter and decorated with needle-like processes, each with a distal swelling. Molecular phylogenies using maximum likelihood (ML) were examined by three statistical methods (bootstrap, approximate Bayes and the Shimodaira-Hasegawa-like approximate likelihood-ratio test), which clearly demonstrated that the isolate belonged to the genus Biecheleria but formed a clade distinct from all previously described species. Genetic distance analyses justified describing the isolate as a new species rather than a new ribotype of B. cincta.KEYWORDS: Amphiesmal vesicle (AV)DinoflagellatesGenetic distanceNucleus-encoded rDNAPhylogeny DISCLOSURE STATEMENTNo potential conflict of interest was reported by the authors.Supplementary InformationSupplemental data for this article can be accessed online at https://doi.org/10.1080/00318884.2023.2273655Additional informationFundingThis work was financially supported by the National Science Foundation of China (No. 42106199), the Science & Technology Basic Resources Investigation Program of China (2018FY100204) and the Science and Technology Innovation Project of Laoshan Laboratory (LSKJ202203700).
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东港双梯队在黄海沿岸沉积物中萌发的一种新的海生woloszynskioid (Suessiaceae, Dinophyceae)
摘要利用光镜和扫描电镜对日照沿海沉积物中萌发的新海生woloszynskioid dinoflagellate Biecheleria donggangensis sp. nov.进行了研究。根据核rDNA(部分LSU、SSU和ITS1-5.8S-ITS2)序列推断其系统发育位置。细胞呈球形至椭球状(长8.5 ~ 19.2 μm,宽5.9 ~ 11.5 μm),叶绿体呈小圆盘状,细胞核位于中心。扫描电镜显示,根尖沟区由一个细长的根尖囊泡(EAV)组成,在根尖顶部有20 ~ 34个小球状突起,以及13 ~ 15个纬向的两角状囊泡(AVs)。东港比echeleria Biecheleria donggangensis可以通过与EAV相邻的av配置、av的纬向数量以及EAV周围的毛囊孔(TP)结构与其他同属物种进行区分。厚壁球形(或椭圆形)囊肿直径16.1 ~ 23.5 μm,表面有针状突起,远端肿胀。采用bootstrap、近似贝叶斯和shimodaira - hasegawa样近似似然比检验等三种统计方法对分子系统发育进行了检验,结果表明该分离物属于Biecheleria属,但形成了一个与所有先前描述的物种不同的分支。遗传距离分析证明了将分离物描述为新种而不是新核型的合理性。关键词:两角状囊泡(AV)鞭毛藻;遗传距离;细胞核编码;基金资助:国家自然科学基金(No. 4266199)、国家科技基础资源调查计划(No. 2018FY100204)和崂山实验室科技创新项目(LSKJ202203700)。
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来源期刊
Phycologia
Phycologia 生物-海洋与淡水生物学
CiteScore
3.10
自引率
18.80%
发文量
54
审稿时长
3 months
期刊介绍: Phycologia is published bimonthly by the International Phycological Society and serves as a publishing medium for information about any aspect of phycology. Membership in the Society is not necessary for publication. Submitted manuscripts cannot be previously published or submitted elsewhere. Copyright ownership of all accepted papers is held by the International Phycological Society.
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