scholarly journals Geographic parthenogenesis in the brown alga Scytosiphon lomentaria (Scytosiphonaceae): sexuals in warm waters and parthenogens in cold waters

2021 ◽  
Author(s):  
Masakazu Hoshino ◽  
Shimpei F. Hiruta ◽  
Maria Emilia Croce ◽  
Mitsunobu Kamiya ◽  
Takahiro Jomori ◽  
...  
Keyword(s):  
Brown Alga ◽  
Geographic Parthenogenesis ◽  
Scytosiphon Lomentaria

scholarly journals Geographic parthenogenesis in the brown alga Scytosiphon lomentaria (Scytosiphonaceae): sexuals in warm waters and parthenogens in cold waters

2021 ◽  
Author(s):  
Masakazu Hoshino ◽  
Shimpei Hiruta ◽  
Maria Croce ◽  
Mitsunobu Kamiya ◽  
Takahiro Jomori ◽  
...  
Keyword(s):  
Brown Alga ◽  
Phylogenetic Analyses ◽  
Ocean Current ◽  
Origin And Evolution ◽  
Male Gametes ◽  
Geographic Parthenogenesis ◽  
Genome Wide ◽  
Scytosiphon Lomentaria ◽  
Species Hybridization

Geographic parthenogenesis (GP), a phenomenon where parthenogens and their close sexual relatives inhabit distinct geographic areas, has been considered an interesting topic to understand the adaptation to marginal habitats and the role of hybridization in evolution. Reports of GP from land and freshwater are numerous, however, this occurrence has been rarely reported on from the sea. Brown algae are mostly marine and are thought to include numerous obligate parthenogens; still, little is known about the distribution, origin, and evolution of parthenogens in this group. Here we report a novel pattern of GP in the isogamous brown alga Scytosiphon lomentaria. Sex ratio investigation demonstrated that, in Japan, sexual populations grew in the coast along warm ocean currents, whereas female-dominant parthenogenetic populations grew mainly in the coast along a cold ocean current. In the two localities where sexual and parthenogenetic populations were parapatric, parthenogens grew in more wave-exposed areas than sexuals. Population genetic and phylogenetic analyses, including those based on genome-wide single nucleotide polymorphism data, suggested that: (1) parthenogens evolved at least twice in S. lomentaria, (2) parthenogens did not originate from inter-species hybridization, (3) new parthenogenetic lineages have arisen from hybridizations between parthenogens and sexuals, and (4) parthenogens have a wider distribution than sexuals. We also showed that the production of sex pheromones, which attract male gametes, has been independently suppressed/lost in two parthenogenetic lineages. This parallel suppression/loss of the sexual trait may represent the direct origin of parthenogens, or the regressive evolution of a useless trait under asexuality.

Destruction of maternal centrioles during fertilization of the brown alga,Scytosiphon lomentaria (Scytosiphonales, Phaeophyceae)

2004 ◽  
Vol 59 (2) ◽  
pp. 109-118 ◽  
Author(s):  
Chikako Nagasato ◽  
Taizo Motomura
Keyword(s):  
Brown Alga ◽  
Scytosiphon Lomentaria

A photoperiodic response mediated by blue light in the brown alga Scytosiphon lomentaria

Planta ◽  
1975 ◽  
Vol 125 (1) ◽  
pp. 25-32 ◽  
Author(s):  
M. J. Dring ◽  
K. L�ning
Keyword(s):  
Blue Light ◽  
Brown Alga ◽  
Photoperiodic Response ◽  
Scytosiphon Lomentaria

NEW PYRENOID FORMATION IN THE BROWN ALGA, SCYTOSIPHON LOMENTARIA (SCYTOSIPHONALES, PHAEOPHYCEAE) 1

2002 ◽  
Vol 38 (4) ◽  
pp. 800-806 ◽  
Author(s):  
Chikako Nagasato ◽  
Taizo Motomura
Keyword(s):  
Brown Alga ◽  
Scytosiphon Lomentaria

HETEROMORPHIC LIFE-HISTORY STRATEGIES IN THE BROWN ALGA SCYTOSIPHON LOMENTARIA (LYNGB.) LINK1

1983 ◽  
Vol 19 (4) ◽  
pp. 425-431 ◽  
Author(s):  
Mark M. Littler ◽  
Diane S. Littler
Keyword(s):  
Life History ◽  
Brown Alga ◽  
Life History Strategies ◽  
Scytosiphon Lomentaria

The Autofluorescent Substance in the Posterior Flagellum of Swarmers of the Brown Alga Scytosiphon lomentaria

1996 ◽  
Vol 51 (3-4) ◽  
pp. 155-159 ◽  
Author(s):  
Kimiaki Yamano ◽  
Hiroshi Saito ◽  
Yukie Ogasawara ◽  
Shoko Fujii ◽  
Hiroko Yamada ◽  
...  
Keyword(s):  
Natural Product ◽  
Brown Alga ◽  
Fluorescent Substance ◽  
Posterior Flagellum ◽  
Scytosiphon Lomentaria ◽  
First Time

Abstract The flagellar autofluorescent substance of the brown alga Scytosiphon lomentaria , which is probably involved in the photoreception of the phototaxis of flagellate cells, was investi­ gated. 4′,5′-Cyclic FMN (1) was isolated from the extract of whole mature plants for the first time as a natural product. Since the concentration of 4′,5′-cyclic FMN (1) was considerably low in vegetative plants, which do not contain fluorescent flagella, this substance is consid­ered to correspond to the flagellar fluorescent substance.

Identification of three proteins involved in fertilization and parthenogenetic development of a brown alga, Scytosiphon lomentaria

Planta ◽  
2014 ◽  
Vol 240 (6) ◽  
pp. 1253-1267 ◽  
Author(s):  
Jong Won Han ◽  
Tatyana A. Klochkova ◽  
Junbo Shim ◽  
Chikako Nagasato ◽  
Taizo Motomura ◽  
...  
Keyword(s):  
Brown Alga ◽  
Parthenogenetic Development ◽  
Scytosiphon Lomentaria

Inheritance of mitochondrial and chloroplast genomes in the isogamous brown alga Scytosiphon lomentaria (Phaeophyceae)

2006 ◽  
Vol 54 (1) ◽  
pp. 65-71 ◽  
Author(s):  
Yusuke Kato ◽  
Kazuhiro Kogame ◽  
Chikako Nagasato ◽  
Taizo Motomura
Keyword(s):  
Brown Alga ◽  
Chloroplast Genomes ◽  
Scytosiphon Lomentaria

scholarly journals The complete plastid genome of the brown alga Scytosiphon lomentaria (scytosiphonaceae, phaeophyceae)

2019 ◽  
Vol 4 (2) ◽  
pp. 2161-2162
Author(s):  
Kuipeng Xu ◽  
Bin Zhou ◽  
Yan Sun ◽  
Yu Zang
Keyword(s):  
Brown Alga ◽  
Plastid Genome ◽  
Scytosiphon Lomentaria
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