Prasinococcus capsulatus gen. et sp. nov., a new marine coccoid prasinophyte.

Miyashita, Hideaki; Ikemoto, Hisato; Kurano, Norihide; Miyachi, Sigetoh; Chihara, Mitsuo

doi:10.2323/jgam.39.571

Cited by 36 publications

(46 citation statements)

References 15 publications

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“…These were most closely related to Bathycoccus prasinos, a prasinophyte. Prasinophytes are found in the surface waters of many oceanic environments, including the Antarctic (Stoecker et al 1998), the Pacific near Japan (Miyashita, et al 1993), and the Gulf of Mexico. B. prasinos was first descnbed in the Gulf of Naples, Italy (Eikrem & Throndsen 1990).…”

Section: Fig 2 Is a Neighbor Joining Tree Of Deduced Rbclmentioning

confidence: 99%

Micro- and macrodiversity in rbcL sequences in ambient phytoplankton populations from the southeastern Gulf of Mexico

Paul¹,

Alfreider²,

Wawrik³

2000

Mar. Ecol. Prog. Ser.

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Ribulose-l,5-diphosphate carboxylase/oxygenase (RuBisCO) large subunit genes (rbcL) were obtained by amplification and cloning of 554 or 614 bp sequences of indigenous phytoplankton populations at 2 stations in the southeastern Gulf of Mexico. One station (Stn 4) was located in a low saiinity, high chlorophyii plume (the 'Green River') which has previously been shown to contain elevated levels of Form IA rbcL mRNA while the other (Stn 7) was in oligotrophic, oceanic water. A diversity of rbcL sequences was obtained, spanning 3 of the 4 evolutionary clades of Form I RuBisCOs. Six nucleotide sequences obtained from Stn 4 were closely related (92 to 96% simiiar) to the Form iAcontaining Prochlorococcus GP2. Flow cytometry and pigment analysis indicated that Prochlorococcus was abundant at this site. Other sequences found included a Form IB rbcL closely related to prasinophytes, and Form ID sequences related to prymnesiophytes, diatoms, and pelagophytes. One sequence was nearly identical to the pelagophyte, Pelagomonas calceolata. At Stn 7, sequences were obtained that were more deeply rooted, and less similar to rbcLs in existing databases (77 to 83 % simiiar), and no Form 1A rbcLs were detected. HPLC pigment signatures and flow cytometry data were consistent with the forms obtained by cloning. The similarity of the 6 Prochlorococcus GP2-like sequences (93 to 98 %) is consistent with the phenomenon of molecular rnicrodiversity as found at other loci in manne (and other environmental) microorganisms.

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Section: Fig 2 Is a Neighbor Joining Tree Of Deduced Rbclmentioning

confidence: 99%

Micro- and macrodiversity in rbcL sequences in ambient phytoplankton populations from the southeastern Gulf of Mexico

Paul¹,

Alfreider²,

Wawrik³

2000

Mar. Ecol. Prog. Ser.

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“…In contrast, the eukaryotic picophytoplankton is much more diverse and apparently composed of organisms that belong to several algal divisions, including the Heterokonta, Chlorophyta, Prasinophyta, and Haptophyta (Thomsen 1986. Within these algal lineages, many new taxa, at the genus, order, or even class level, have been described from picoplankton in the past 10 years (Booth and Marchant 1987, Eikrem and Throndsen 1990, Guillard et al 1991, Miyashita et al 1993, Hasegawa et al 1996. For example, Andersen et al (1993) erected a new algal class, the Pelagophyceae Andersen and Saunders (Heterokonta), on the basis of a new picoplanktonic species, Pelagomonas calceolata Andersen et Saunders.…”

mentioning

confidence: 99%

BOLIDOMONAS: A NEW GENUS WITH TWO SPECIES BELONGING TO A NEW ALGAL CLASS, THE BOLIDOPHYCEAE (HETEROKONTA)

Guillou

Chrétiennot‐Dinet

Medlin

et al. 1999

Journal of Phycology

213

185

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A new algal class, the Bolidophyceae (Heterokonta), is described from one genus, Bolidomonas, gen. nov., and two species, Bolidomonas pacifica, sp. nov and Bolidomonas mediterranea, sp. nov., isolated from the equatorial Pacific Ocean and the Mediterranean Sea, respectively. Both species are approximately 1.2 m in diameter and have two unequal flagella; the longer flagellum bears tubular hairs, whereas the shorter is smooth. The flagellar basal apparatus is restricted to two basal bodies, and there is no transitional helix. Cells are naked, devoid of walls or siliceous structures. The internal cellular organization is simple with a single plastid containing a ring genophore and a girdle lamella, one mitochondrion with tubular cristae, and one Golgi apparatus close to the basal bodies. The Mediterranean and the Pacific species differ in the insertion angle between their flagella and their pattern of swimming, these differences possibly being linked to each other. Analyses of the SSU rDNA gene place the two strains as a sister group to the diatoms. Moreover, pigment analyses confirm this position, as fucoxanthin is found as the major carotenoid in both lineages. These data strongly suggest that the ancestral heterokont that gave rise to the diatom lineage was probably a biflagellated unicell.

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“…5.2b, c ), have small (2-4 μm), yellow-green, thick-walled (multilayered) and afl agellate cells, without basal bodies or scales. A branch of the mitochondrion invades the pyrenoid and the pigment complement includes micromonol (Miyashita et al 1993 ;Jouenne et al 2011 ). Division is unequal and by budding, with only the smaller of the daughter cells escaping the parent cell wall before forming its own (Miyashita et al 1993 ;Hasegawa et al 1996 ).…”

Section: Order Prasinococcales (Clade Vi)mentioning

confidence: 99%

“…A branch of the mitochondrion invades the pyrenoid and the pigment complement includes micromonol (Miyashita et al 1993 ;Jouenne et al 2011 ). Division is unequal and by budding, with only the smaller of the daughter cells escaping the parent cell wall before forming its own (Miyashita et al 1993 ;Hasegawa et al 1996 ). Prasinococcus is monospecifi c ( P. capsulatus Miyashita et Chihara 1993;Miyashita et al 1993 ) and differs from Prasinoderma by having a gelatinous envelope secreted though holes in a collared rim of the cell wall (Miyashita et al 1993 ).…”

Section: Order Prasinococcales (Clade Vi)mentioning

confidence: 99%

“…Division is unequal and by budding, with only the smaller of the daughter cells escaping the parent cell wall before forming its own (Miyashita et al 1993 ;Hasegawa et al 1996 ). Prasinococcus is monospecifi c ( P. capsulatus Miyashita et Chihara 1993;Miyashita et al 1993 ) and differs from Prasinoderma by having a gelatinous envelope secreted though holes in a collared rim of the cell wall (Miyashita et al 1993 ). Prasinoderma has two species, P. coloniale Hasegawa et Chihara 1996and P. singularis Jouenne 2011(Hasegawa et al 1996.…”

Section: Order Prasinococcales (Clade Vi)mentioning

confidence: 99%

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Basal Lineages of Green Algae – Their Diversity and Phylogeny

Sym

2015

Marine Protists

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The basal lineages of the green algae (Chlorophyta) were historically merged in a single class of usually scaly green algal members, the Prasinophyceae. While ultrastructural data were more or less supportive of this idea, modern molecular phylogenetics is showing that a single class is untenable and members are currently accommodated in up to fi ve new classes, (the Chlorodendrophyceae, Mamiellophyceae, Mesostigmatophyceae, Nephroselmidophyceae and Pedinophyceae), with more still to come. This chapter considers the characteristics of, and phylogenetic relationships between, these new classes and other related groups, as well as their representatives and, briefl y, their ecology.

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Prasinococcus capsulatus gen. et sp. nov., a new marine coccoid prasinophyte.

Cited by 36 publications

References 15 publications

Micro- and macrodiversity in rbcL sequences in ambient phytoplankton populations from the southeastern Gulf of Mexico

Micro- and macrodiversity in rbcL sequences in ambient phytoplankton populations from the southeastern Gulf of Mexico

BOLIDOMONAS: A NEW GENUS WITH TWO SPECIES BELONGING TO A NEW ALGAL CLASS, THE BOLIDOPHYCEAE (HETEROKONTA)

Basal Lineages of Green Algae – Their Diversity and Phylogeny

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