scholarly journals Monoclonal antibodies that recognize symbiotic bacteria and hemocytes in the deep-sea vesicomyid clam Phreagena okutanii

2018 ◽  
Vol 26 (0) ◽  
pp. 75-83
Author(s):  
Kazue Ohishi ◽  
Yoshimitsu Nakamura ◽  
Chiho Kusaka ◽  
Yukiko Nagai ◽  
Masatoshi Nakazawa ◽  
...  
Keyword(s):  
Monoclonal Antibodies ◽  
Deep Sea ◽  
Symbiotic Bacteria ◽  
Vesicomyid Clam

The escal light gland of the deep-sea anglerfish Haplophryne mollis (Pisces: Ceratioidei) with observations on luminescence control

1994 ◽  
Vol 74 (4) ◽  
pp. 747-763 ◽  
Author(s):  
Peter J. Herring ◽  
Ole Munk
Keyword(s):  
Deep Sea ◽  
Light Emission ◽  
Light And Electron Microscopy ◽  
Symbiotic Bacteria ◽  
Uniform Structure ◽  
Basal Cells ◽  
Bacterial Luciferase ◽  
The Right

The escal light gland of three different-sized specimens of the deep-sea anglerfish Haplophryne mollis (family Linophrynidae) has been examined by light and electron microscopy. The light gland has a central cavity, with diverging branched ducts which ramify into numerous tightly-packed radial tubules. In the two largest specimens all glandular lumina contain symbiotic bacteria. Except for a thin-walled part of the typical radiating tubules, the epithelial walls of the light gland are of a uniform structure, consisting of flattened basal cells, situated next to the basal lamina, and tall cells extending to the lumen.In the smallest specimen examined the various parts of the light gland were not fully differentiated and only a very few symbiotic bacteria were present; its glandular epithelium differed from that of the two larger specimens by containing many goblet cells, the secretion of which may be important for the initial establishment of the right strain of symbiotic bacteriaObservations on the luminescence of live specimens have shown that the light emission can be rapidly modulated from within the esca. The in vivo flash kinetics are considerably slower than those of Dolopichthys longicornis, but similar to those of both the caruncle exudate of Ceratias holboelli and in vitro anglerfish bacterial luciferase.

scholarly journals Effects of Hemagglutination Activity in the Serum of a Deep-Sea Vent Endemic Crab, Shinkaia Crosnieri, on Non-Symbiotic and Symbiotic Bacteria

2015 ◽  
Vol 30 (3) ◽  
pp. 228-234 ◽  
Author(s):  
So Fujiyoshi ◽  
Hiroaki Tateno ◽  
Tomoo Watsuji ◽  
Hideyuki Yamaguchi ◽  
Daisuke Fukushima ◽  
...  
Keyword(s):  
Deep Sea ◽  
Symbiotic Bacteria ◽  
Hemagglutination Activity

Rhaptothyreus typicus Hope & Murphy, 1969 (Nematoda: Rhaptothyreidae): an anatomical study of an unusual deep-sea nematode

Nematology ◽  
2006 ◽  
Vol 8 (1) ◽  
pp. 1-20 ◽  
Author(s):  
Dmitry M. Miljutin ◽  
Alexei V. Tchesunov ◽  
Duane W. Hope
Keyword(s):  
Light Microscopy ◽  
Reproductive System ◽  
Deep Sea ◽  
Phylogenetic Relationships ◽  
Anatomical Study ◽  
Symbiotic Bacteria ◽  
Solid Mass ◽  
Oral Aperture ◽  
Anterior Circle

Abstract Descriptions are given for the males of Rhaptothyreus typicus, a morphologically unique and incompletely investigated deep-sea nematode, using light microscopy, TEM, and SEM. The cephalic sensilla are arranged in two circles: an anterior circle consisting of six pairs of papilliform sensilla and a posterior circle consisting of four papilliform sensilla. The fovea of the giant, oblong, amphid is covered with cuticle bearing minute perforations. The actual amphidial aperture, revealed only by TEM, is minute and slitlike. The apical oral aperture is reduced to a simple pore and the vestigial pharynx is devoid of an internal lumen and musculature. The mid-gut is a trophosome consisting of a solid mass of irregularly-shaped cells filled with rod-shaped structures that are assumed to be intracellular symbiotic bacteria. There is no evidence of even a vestige of a reproductive system except for the presence of the single spiculum. The phylogenetic relationships of Rhaptothyreus remain unknown.

scholarly journals Monoclonal antibodies to hemocytes of the deep-sea symbiotic mussel, Bathymodiolus japonicus

2016 ◽  
Vol 23 (0) ◽  
pp. 27-33 ◽  
Author(s):  
Daisuke Sekine ◽  
Kazue Ohishi ◽  
Yoshimitsu Nakamura ◽  
Chiho Kusaka ◽  
Akihiro Tame ◽  
...  
Keyword(s):  
Monoclonal Antibodies ◽  
Deep Sea

In situ spawning of a deep-sea vesicomyid clam: Evidence for an environmental cue

1998 ◽  
Vol 45 (11) ◽  
pp. 1881-1889 ◽  
Author(s):  
Yoshihiro Fujiwara ◽  
Junzo Tsukahara ◽  
Jun Hashimoto ◽  
Katsunori Fujikura
Keyword(s):  
Deep Sea ◽  
Environmental Cue ◽  
Vesicomyid Clam

Expression of genes involved in the uptake of inorganic carbon in the gill of a deep-sea vesicomyid clam harboring intracellular thioautotrophic bacteria

Gene ◽  
2016 ◽  
Vol 585 (2) ◽  
pp. 228-240 ◽  
Author(s):  
Yuki Hongo ◽  
Tetsuro Ikuta ◽  
Yoshihiro Takaki ◽  
Shigeru Shimamura ◽  
Shuji Shigenobu ◽  
...  
Keyword(s):  
Deep Sea ◽  
Inorganic Carbon ◽  
Expression Of Genes ◽  
Vesicomyid Clam

scholarly journals Differences in cofactor, oxygen and sulfur requirements influence niche adaptation in deep-sea vesicomyid clam symbioses

2020 ◽  
Author(s):  
Corinna Breusing ◽  
Maёva Perez ◽  
Roxanne A. Beinart ◽  
C. Robert Young
Keyword(s):  
Vertical Transmission ◽  
Deep Sea ◽  
Genetic Material ◽  
Niche Differentiation ◽  
Nitrate Respiration ◽  
Ecological Niches ◽  
Niche Adaptation ◽  
Bacterial Endosymbionts ◽  
Vesicomyid Clam

AbstractVertical transmission of bacterial endosymbionts is accompanied by virtually irreversible gene loss that can provide insights into adaptation to divergent ecological niches. While patterns of genome reduction have been well described in some terrestrial symbioses, they are less understood in marine systems where vertical transmission is relatively rare. The association between deep-sea vesicomyid clams and chemosynthetic Gammaproteobacteria is one example of maternally inherited symbioses in the ocean. Differences in nitrogen and sulfur physiology between the two dominant symbiont groups, Ca. Ruthia and Ca. Vesicomyosocius, have been hypothesized to influence niche exploitation, which likely affects gene content evolution in these symbionts. However, genomic data are currently limited to confirm this assumption. In the present study we sequenced and compared 11 vesicomyid symbiont genomes with existing assemblies for Ca. Vesicomyosocius okutanii and Ca. Ruthia magnifica. Our analyses indicate that the two vesicomyid symbiont groups have a common core genome related to chemosynthetic metabolism, but differ in their potential for nitrate respiration and flexibility to environmental sulfide concentrations. Moreover, Ca. Vesicomyosocius and Ca. Ruthia have different enzymatic requirements for cobalamin and nickel and show contrasting capacities to acquire foreign genetic material. Tests for site-specific positive selection in metabolic candidate genes imply that the observed physiological differences are adaptive and thus likely correspond to ecological niches available to each symbiont group. These findings highlight the role of niche differentiation in creating divergent paths of reductive genome evolution in vertically transmitted symbionts.

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