Comparative Animal Physiology

Prosser, C. Ladd; Brown, Frank A.

doi:10.1097/00000441-196206000-00017

Cited by 215 publications

(79 citation statements)

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“…That these are not identical for the three species examined may be related to their differing ecological habitats, e.g. the fact that lower NaCl concentrations support luminescence of the two symbionts than in the case of P. phosphoreum, isolated as a free-living species, is in accord with the recent observations of Prosser (1973) that the ambient NaCl concentration within fish light-organs is much lower than that of sea-water.…”

Section: Discussionsupporting

confidence: 59%

Salt, pH and Temperature Dependencies of Growth and Bioluminescence of Three Species of Luminous Bacteria Analysed on Gradient Plates

Waters

Lloyd

1985

Microbiology

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Two-dimensional diffusion gradients (of NaCl and H+ concentrations) were established in solid growth medium containing glycerol and yeast extract as major carbon sources. These were used to investigate conditions favourable for growth and bioluminescence of three species of luminous bacteria during incubation at different temperatures. Photobacterium leiognathi, Photobacterium phosphoreum and Vibriofischeri all grew over the entire salt range used [O-9-3 % (w/v) NaCl] and at pH values < 7 at the most favourable temperatures (20 "C, 20 "C and 15 "C respectively); upper and lower temperature limits for growth over a 72 h period were 30 and 10, 25 and 5, and 30 and 5 "C respectively. Bioluminescence was observed at all temperatures that supported growth; in P. leiognathi emission at 10 "C was hardly detectable even after 72 h, but at higher temperatures it occurred at all NaCl concentrations. Low pH values and high NaCl concentrations favoured luminescence in the other two organisms; after 48 h light emission decreased from the high pH and low NaCl regions of the gels. These results are discussed with reference to the symbiotic ( P . leiognathi, V.$sheri) or free-living ( P . phosphoreum) origins of the organisms studied.

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Section: Discussionsupporting

confidence: 59%

Salt, pH and Temperature Dependencies of Growth and Bioluminescence of Three Species of Luminous Bacteria Analysed on Gradient Plates

Waters

Lloyd

1985

Microbiology

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“…Other waste products are also excreted along with chlorophyll degradation compounds. It is well known that two purines are the main nitrogenous waste products in arthropods, namely uric acid in insects and guanine in spiders, and the lack of certain enzymes in spiders was offered as a possible reason to explain this difference (Prosser 1950;Boudreaux 1963;Anderson 1966). Both guanine and uric acid are insoluble and may be stored within Malpighian tubules as crystals prior to excretion (Evans 1992;Alberti et al 1999).…”

Section: Discussionmentioning

confidence: 99%

Chlorophyll and its degradation products in the two-spotted spider mite, Tetranychus urticae: observations using epifluorescence and confocal laser scanning microscopy

Occhipinti

Maffei

2013

Exp Appl Acarol

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This is the author's final version of the contribution published as:A. Occhipinti; M. Maffei. Chlorophyll and its degradation products in the two-spotted spider mite, Tetranychus urticae: observations using epifluorescence and confocal laser scanning microscopy. EXPERIMENTAL AND APPLIED ACAROLOGY. AbstractChlorophyll and chlorophyll degradation products were observed in the two-spotted spider mite (Tetranychus urticae) using epifluorescence microscopy (EFM) and confocal laser scanning microscopy (CLSM). A clear red fluorescence (EFM) and a fluorescence induced by a laser wavelength of 650 nm (CLSM) were observed. In the lateral caeca, in the ventriculus and in the excretory organ, a bright light blue fluorescence was observed in close association with chlorophyll by using EFM. The same material can be localized with CLSM by using a laser with a wavelength of 488 nm. By comparison with synthetic guanine, this bright fluorescence is supposed to be guanine. The presence of guanine fluorescence in the mite pellets confirms this hypothesis. A possible mechanism for guanine formation is discussed. KeywordsTetranychus urticae Epifluorescence microscopy Confocal laser scanning microscopy Chlorophyll Guanine

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“…The concentration of ions in the final fixative solution (including the contribution from the buffer) was approximately that which normally occurs in the body fluid of the animal (29).…”

Section: mentioning

confidence: 94%

ULTRASTRUCTURAL ORGANIZATION OF OBLIQUELY STRIATED MUSCLE FIBERS IN ASCARIS LUMBRICOIDES

Rosenbluth

1965

The Journal of Cell Biology

203

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The somatic musculature of the nematode, Ascaris, is currently thought to consist of smooth muscle fibers, which contain intracellular supporting fibrils arranged in a regular pattern. Electron microscopic examination shows that the muscle fibers are, in fact, comparable to the striated muscles of vertebrates in that they contain interdigitating arrays of thick and thin myofilaments which form H, A, and I bands. In the A bands each thick filament is surrounded by about l0 to 12 thin filaments. The earlier confusion about the classification of this muscle probably arose from the fact that in one longitudinal plane the myofilaments are markedly staggered and, as a result, the striations in that plane of section are not transverse but oblique, forming an angle of only about 6 ° with the filament axis. The apparent direction of the striations changes with the plane of the section and may vary all the way from radial to longitudinal. A three-dimensional model is proposed which accounts for the appearance of this muscle in various planes. Z lines as such are absent but are replaced by smaller, less orderly, counterpart "Z bundles" to which thin filaments attach. These bundles are closely associated with fibrillar dense bodies and with deep infoldings of the plasma membrane. The invaginations of the plasma membrane together with intracellular, flattened, membranous cisternae form dyads and triads. It is suggested that these complexes, which also occur at the cell surface, may constitute strategically located, low-impedance patches through which local currents are channeled selectively.

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Comparative Animal Physiology

Cited by 215 publications

References 0 publications

Salt, pH and Temperature Dependencies of Growth and Bioluminescence of Three Species of Luminous Bacteria Analysed on Gradient Plates

Salt, pH and Temperature Dependencies of Growth and Bioluminescence of Three Species of Luminous Bacteria Analysed on Gradient Plates

Chlorophyll and its degradation products in the two-spotted spider mite, Tetranychus urticae: observations using epifluorescence and confocal laser scanning microscopy

ULTRASTRUCTURAL ORGANIZATION OF OBLIQUELY STRIATED MUSCLE FIBERS IN ASCARIS LUMBRICOIDES

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