MODIFICATION OF SEA ANEMONE BEHAVIOR BY SYMBIOTIC ZOOXANTHELLAE: EXPANSION AND CONTRACTION
نویسندگان
چکیده
منابع مشابه
Molecular genetic identification of symbiotic dinoflagellates (zooxanthellae)
Zooxanthellae are phototrophic dinoflagellates that occur as endosymbionts in many marine invertebrates. Because traditional biological methods have not provided useful schemes for zooxanthella identification and classification, the natural history of zooxanthella symbioses is poorly known. We have apphed molecular genehc methods to zooxanthella taxonomy. Small ribosomal subunit RNA (ssRNA) gen...
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Zooxanthellae are unicellular algae that occur as endosymbionts in many hundreds of common marine invertebrates. The issue of zooxanthella diversity has been difficult to address. Most zooxanthellae have been placed in the dinoflagellate genus Symbiodinium as one or several species that are not easily distinguished. We compared Symbiodinium and nonsymbiotic dinoflagellates using small ribosomal...
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Endogenous circadian clocks are poorly understood within early-diverging animal lineages. We have characterized circadian behavioral patterns and identified potential components of the circadian clock in the starlet sea anemone, Nematostella vectensis: a model cnidarian which lacks algal symbionts. Using automatic video tracking we showed that Nematostella exhibits rhythmic circadian locomotor ...
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A latent virus-like agent, which we designated zooxanthella filamentous virus 1 (ZFV1), was isolated from Symbiodinium sp. strain CCMP 2465 and characterized. Transmission electron microscopy and analytical flow cytometry revealed the presence of a new group of distinctive filamentous virus-like particles after exposure of the zooxanthellae to UV light. Examination of thin sections of the zooxa...
متن کاملSlow Contraction and Its Relation to Spontaneous Activity in the Sea-anemone Metridium Senile (l.)
It has been known for some time that the most rapid reflex contractions of seaanemones show a characteristic relation to the stimulus. Thus in CalUactisparasitica a short series of adequate electric shocks, given at a frequency of about 1 per sec, is regularly followed by a facilitated contraction of the marginal sphincter (Pantin, 1935a, b). That is, each successive shock sets up a nervous imp...
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ژورنال
عنوان ژورنال: The Biological Bulletin
سال: 1974
ISSN: 0006-3185,1939-8697
DOI: 10.2307/1540747