کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8392855 | 1544050 | 2018 | 55 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The Rainwater Rock-pool Dinoflagellate Nottbeckia ochracea gen. et comb. nov. (syn.: Hemidinium ochraceum) - A Fine-structural and Molecular Study with Emphasis on the Motile Stage
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم کشاورزی و بیولوژیک (عمومی)
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چکیده انگلیسی
The rarely recorded dinoflagellate Hemidinium ochraceum Levander was isolated from a rainwater rock-pool in Finland and the motile stage studied by light- and electron microscopy and molecular sequencing. The ultrastructure of the motile stage revealed several features not previously observed in other dinoflagellates, e.g. thecal plates with inwards 'knobs' and a peculiar corrugated left sulcal plate. The apparent lack of the R2 and R4 flagellar roots was also unusual. The typical plate tabulation was 4â², 2a, 8â³, cx, 4c,?s, 3â´, cy, 1p, 2â³â³, cx and cy being extra plates associated with the cingulum, but intraspecific variations were observed in shape and number of plates. Phylogenetic analyses of nuclear-encoded LSU rDNA and concatenation of LSU and SSU rDNA sequences showed that H. ochraceum was only distantly related to Hemidinium nasutum (the type species of Hemidinium). The immotile coccoid stage resembled Gloeodinium montanum and a weakly supported relationship between the two was only inferred in the analyses based on LSU rDNA. Hemidinium ochraceum showed some resemblance to Rufusiella insignis sensu Richards, but the true identity of this species and of genus Rufusiella is uncertain. A new genus, Nottbeckia, is erected to accommodate H. ochraceum, as Nottbeckia ochracea gen. et comb. nov.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Protist - Volume 169, Issue 2, April 2018, Pages 280-306
Journal: Protist - Volume 169, Issue 2, April 2018, Pages 280-306
نویسندگان
Gert Hansen, Niels Daugbjerg, Ãjvind Moestrup,