Lethal Effect of Harmful Dinoflagellate Heterocapsa circularisquama on Molluscan Animals
نویسندگان
چکیده
منابع مشابه
Dozens of toxin-related genes are expressed in a nontoxic strain of the dinoflagellate Heterocapsa circularisquama.
The dinoflagellate Heterocapsa circularisquama is lethal to a variety of marine organisms, in particular, commercially important farmed bivalves. Unlike most dinoflagellate toxins, which are polyketides, the only described toxin from H. circularisquama (H2-a) is a porphyrin derivative that functions in light. It is unknown whether H2-a is produced specifically for its lytic properties. We searc...
متن کاملHigh Interaction Variability of the Bivalve-Killing Dinoflagellate Heterocapsa circularisquama Strains and Their Single-Stranded RNA Virus HcRNAV Isolates
HcRNAV is a single-stranded RNA (ssRNA) virus that specifically infects the bivalve-killing dinoflagellate, Heterocapsa circularisquama. HcRNAV strains are grouped into 2 types (UA and CY), based on intra-species host specificity and the amino acid sequence of the major capsid protein (MCP). In the present study, we report the isolation of novel HcRNAV clones (n=51) lytic to the H. circularisqu...
متن کاملComparison of hemolytic activities among strains of Heterocapsa circularisquama isolated in various localities in Japan.
Heterocapsa circularisquama (Dinophyceae), a red tide dinoflagellate, is toxic to bivalve molluscs such as the pearl oyster (Pinctada fucata), but no harmful effects of this alga on fish have been observed so far. We found that 7 strains of H. circularisquama showed hemolytic activities toward rabbit erythrocytes in a cell-density dependent manner, but to quite different extents. The strains wh...
متن کاملNuclear genome sequence survey of the Dinoflagellate Heterocapsa triquetra.
Dinoflagellates have among the largest nuclear genomes known, but we know little about their contents or organisation. Given the interest in dinoflagellate ecology, cell biology, and evolutionary biology, there are many reasons to thoroughly investigate the contents of dinoflagellate genomes, but because of their large size the only thorough samples to date have relied on expressed sequence tag...
متن کاملThree-dimensional reconstruction of Heterocapsa circularisquama RNA virus by electron cryo-microscopy.
Heterocapsa circularisquama RNA virus is a non-enveloped icosahedral ssRNA virus infectious to the harmful bloom-forming dinoflagellate, H. circularisquama, and which is assumed to be the major natural agent controlling the host population. The viral capsid is constructed from a single gene product. Electron cryo-microscopy revealed that the virus has a diameter of 34 nm and T = 3 symmetry. The...
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ژورنال
عنوان ژورنال: Fish Pathology
سال: 1999
ISSN: 0388-788X,1881-7335
DOI: 10.3147/jsfp.34.225