An SEM Examination of Sagitta tenuis Conant (Chaetognatha), Utilizing a Special Sedation and Handling Procedure

Spero, Howard J.; Hagan, Denise E.; Vastano, Andrew

doi:10.2307/3225951

Cited by 5 publications

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“…For scanning EM, the fixed, intact 0. unizvrsa symbiotic association was dehydrated in a graded ethanol series, placed in Reichert flow-through tissue-processing capsules (American Optical Co.) (Spero et al 1979) and critical-point dried. Dried specimens were transferred to an aluminum stub and attached with a layer of double-back tape.…”

Section: Methodsmentioning

confidence: 99%

SYMBIOSIS IN THE PLANKTONIC FORAMINIFER, ORBULINA UNIVERSA, AND THE ISOLATION OF ITS SYMBIOTIC DINOFLAGELLATE, GYMNODINIUM BÉII SP. NOV.¹

Spero

1987

Journal of Phycology

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The symbiotic association of the spinose planktonic foraminifer, Orbulina universa, with the dinoflagellate, Gymnodinium béii sp. nov., was examined with light and electron microscopy, and the symbiont was isolated into unialgal culture. The intact association is characterized by a diurnal movement of the symbionts from the distal regions of the spines during the day, to perialgal vacuoles within the host cytoplasm at night. This diurnal migration involves a daily endo‐ exocytotic cycle. Gymnodinium béii is non‐motile and spindle‐shaped within the host, whereas it is motile and gymnodinoid in shape when in culture. Ultrastructural examination revealed two or more stalked pyrenoids penetrated by lamellae, a typical dinokaryon nucleus and no trichocysts. A distinct ‘flange’projects over the sulcus from the hypocone. The swimming behavior of this dinoflagellate was characterized by intermittent darting events. Swimming speeds during a dart reached velocities of 770 μm. s−1 as compared to a mean, non‐darting swimming velocity of 126 μm. s−1. Gymnodinium béii is eurythermal and division rates ranged between 0.16 and 0.65 divisions day−1 for culture temperatures between 6.5 and 25° C respectively.

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Section: Methodsmentioning

confidence: 99%

SYMBIOSIS IN THE PLANKTONIC FORAMINIFER, ORBULINA UNIVERSA, AND THE ISOLATION OF ITS SYMBIOTIC DINOFLAGELLATE, GYMNODINIUM BÉII SP. NOV.¹

Spero

1987

Journal of Phycology

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Chaetognatha

Ahnelt

1984

Biology of the Integument

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Ultrastructural examination of chamber morphogenesis and biomineralization in the planktonic foraminiferOrbulina universa

1988

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An SEM Examination of Sagitta tenuis Conant (Chaetognatha), Utilizing a Special Sedation and Handling Procedure

Cited by 5 publications

References 0 publications

SYMBIOSIS IN THE PLANKTONIC FORAMINIFER, ORBULINA UNIVERSA, AND THE ISOLATION OF ITS SYMBIOTIC DINOFLAGELLATE, GYMNODINIUM BÉII SP. NOV.¹

SYMBIOSIS IN THE PLANKTONIC FORAMINIFER, ORBULINA UNIVERSA, AND THE ISOLATION OF ITS SYMBIOTIC DINOFLAGELLATE, GYMNODINIUM BÉII SP. NOV.¹

Chaetognatha

Ultrastructural examination of chamber morphogenesis and biomineralization in the planktonic foraminiferOrbulina universa

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An SEM Examination of Sagitta tenuis Conant (Chaetognatha), Utilizing a Special Sedation and Handling Procedure

Cited by 5 publications

References 0 publications

SYMBIOSIS IN THE PLANKTONIC FORAMINIFER, ORBULINA UNIVERSA, AND THE ISOLATION OF ITS SYMBIOTIC DINOFLAGELLATE, GYMNODINIUM BÉII SP. NOV.1

SYMBIOSIS IN THE PLANKTONIC FORAMINIFER, ORBULINA UNIVERSA, AND THE ISOLATION OF ITS SYMBIOTIC DINOFLAGELLATE, GYMNODINIUM BÉII SP. NOV.1

Chaetognatha

Ultrastructural examination of chamber morphogenesis and biomineralization in the planktonic foraminiferOrbulina universa

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Product

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SYMBIOSIS IN THE PLANKTONIC FORAMINIFER, ORBULINA UNIVERSA, AND THE ISOLATION OF ITS SYMBIOTIC DINOFLAGELLATE, GYMNODINIUM BÉII SP. NOV.¹

SYMBIOSIS IN THE PLANKTONIC FORAMINIFER, ORBULINA UNIVERSA, AND THE ISOLATION OF ITS SYMBIOTIC DINOFLAGELLATE, GYMNODINIUM BÉII SP. NOV.¹