Abstract
Double-barreled O2 microelectrodes were used to study O2 diffusion and consumption in the superfused drone (Apis mellifera) retina in darkness at 22 degrees C. Po2 was measured at different sites in the bath and retinas. It was found that diffusion was essentially in one dimension and that the rate of O2 consumption (Q) was practically constant (on the macroscale) down to Po2 s less than 20 mm Hg, a situation that greatly simplified the analysis. The value obtained for Q was 18 +/- 0.7 (SEM) microliter O2/cm3 tissue . min (n = 10), and Krogh's permeation coefficient (alpha D) was 3.24 +/- 0.18 (SEM) X 10(-5) ml O1/min . atm . cm (n = 10). Calculations indicate that only a small fraction of this Q in darkness is necessary for the energy requirements of the sodium pump. the diffusion coefficient (D) in the retina was measured by abruptly cutting off diffusion from the bath and analyzing the time-course of the fall in Po2 at the surface of the tissue. The mean value of D was 1.03 +/- 0.08 (SEM) X 10(-5) cm2/s (n = 10). From alpha D and D, the solubility coefficient alpha was calculated to be 54 +/- 4.0 (SEM) microliter O2 STP/cm3 . atm (n = 10), approximately 1.8 times that for water.
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- Battino R., Evans F. D., Danforth W. F. The solubilities of seven gases in olive oil with reference to theories of transport through the cell membrane. J Am Oil Chem Soc. 1968 Dec;45(12):830–833. doi: 10.1007/BF02540163. [DOI] [PubMed] [Google Scholar]
- Baumann F., Mauro A. Effect of hypoxia on the change in membrane conductance evoked by illumination in arthropod photoreceptors. Nat New Biol. 1973 Aug 1;244(135):146–148. doi: 10.1038/newbio244146b0. [DOI] [PubMed] [Google Scholar]
- Baumann F. Slow and spike potentials recorded from retinula cells of the honeybee drone in response to light. J Gen Physiol. 1968 Dec;52(6):855–875. doi: 10.1085/jgp.52.6.855. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Burnel M., Mahler H. R., Moore W. J. Protein synthesis in visual cells of Limulus. J Neurochem. 1970 Oct;17(10):1493–1499. doi: 10.1111/j.1471-4159.1970.tb00516.x. [DOI] [PubMed] [Google Scholar]
- Coles J. A., Tsacopoulos M. Potassium activity in photoreceptors, glial cells and extracellular space in the drone retina: changes during photostimulation. J Physiol. 1979 May;290(2):525–549. doi: 10.1113/jphysiol.1979.sp012788. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Evans N. T., Constable T. B. A method for measuring oxygen uptake rate distributions over the surface zone of excised tissues using a 91-cathode electrode. Adv Exp Med Biol. 1976;75:25–32. doi: 10.1007/978-1-4684-3273-2_4. [DOI] [PubMed] [Google Scholar]
- Ganfield R. A., Nair P., Whalen W. J. Mass transfer, storage, and utilization of O2 in cat cerebral cortex. Am J Physiol. 1970 Sep;219(3):814–821. doi: 10.1152/ajplegacy.1970.219.3.814. [DOI] [PubMed] [Google Scholar]
- Gore R. W., Whalen W. J. Relations among tissue PO2, QO2, and resting heat production of frog sartorius muscle. Am J Physiol. 1968 Feb;214(2):277–286. doi: 10.1152/ajplegacy.1968.214.2.277. [DOI] [PubMed] [Google Scholar]
- Harris S. I., Balaban R. S., Mandel L. J. Oxygen consumption and cellular ion transport: evidence for adenosine triphosphate to O2 ratio near 6 in intact cell. Science. 1980 Jun 6;208(4448):1148–1150. doi: 10.1126/science.6246581. [DOI] [PubMed] [Google Scholar]
- Hill D. K. Oxygen tension and the respiration of resting frog's muscle. J Physiol. 1948 Sep 30;107(4):479–495. doi: 10.1113/jphysiol.1948.sp004293. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Lantz R. C., Mauro A. Alteration of sensitivity and time scale in invertebrate photoreceptors exposed to anoxia, dinitrophenol, and carbon dioxide. J Gen Physiol. 1978 Aug;72(2):219–231. doi: 10.1085/jgp.72.2.219. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Mahler M. Diffusion and consumption of oxygen in the resting frog sartorius muscle. J Gen Physiol. 1978 May;71(5):533–557. doi: 10.1085/jgp.71.5.533. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Mahler M. Kinetics of oxygen consumption after a single isometric tetanus of frog sartorius muscle at 20 degrees C. J Gen Physiol. 1978 May;71(5):559–580. doi: 10.1085/jgp.71.5.559. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Pepe I. M., Baumann F. Incorporation of 3 H-labelled leucine into the protein fraction in the retina of the honeybee drone. J Neurochem. 1972 Feb;19(2):507–512. doi: 10.1111/j.1471-4159.1972.tb01360.x. [DOI] [PubMed] [Google Scholar]
- Perrelet A. Protein synthesis in the visual cells of the honeybee drone as studied with electron microscope radioautography. J Cell Biol. 1972 Dec;55(3):595–605. doi: 10.1083/jcb.55.3.595. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Perrelet A. The fine structure of the retina of the honey bee drone. An electron microscopical study. Z Zellforsch Mikrosk Anat. 1970;108(4):530–562. doi: 10.1007/BF00339658. [DOI] [PubMed] [Google Scholar]
- Rang H. P., Ritchie J. M. The dependence on external cations of the oxygen consumption of mammalian non-myelinated fibres at rest and during activity. J Physiol. 1968 May;196(1):163–181. doi: 10.1113/jphysiol.1968.sp008501. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Schneiderman G., Goldstick T. K. Oxygen fields induced by recessed and needle oxygen microelectrodes in homogeneous media. Adv Exp Med Biol. 1976;75:9–16. doi: 10.1007/978-1-4684-3273-2_2. [DOI] [PubMed] [Google Scholar]
- Stein P. J., Brammer J. D., Ostroy S. E. Renewal of opsin in the photoreceptor cells of the mosquito. J Gen Physiol. 1979 Nov;74(5):565–582. doi: 10.1085/jgp.74.5.565. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Takahashi G. H., Fatt I., Goldstick T. K. Oxygen consumption rate of tissue measured by a micropolarographic method. J Gen Physiol. 1966 Nov;50(2):317–335. doi: 10.1085/jgp.50.2.317. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Tsacopoulos M., Lehmenkühler A. A double-barrelled Pt-microelectrode for simultaneous measurement of PO2 and bioelectrical activity in excitable tissues. Experientia. 1977 Oct 15;33(10):1337–1338. doi: 10.1007/BF01920167. [DOI] [PubMed] [Google Scholar]
- Whalen W. J., Riley J., Nair P. A microelectrode for measuring intracellular PO2. J Appl Physiol. 1967 Nov;23(5):798–801. doi: 10.1152/jappl.1967.23.5.798. [DOI] [PubMed] [Google Scholar]
- Wiernsperger N., Kunke S., Gygax P. Technical note about simultaneous recording of oxygen partial pressure and neuronal activity in cat cortex. Experientia. 1976 May 15;32(5):671–673. doi: 10.1007/BF01990227. [DOI] [PubMed] [Google Scholar]
- Wong F., Wu C. F., Mauro A., Pak W. L. Persistence of prolonged light-induced conductance change in arthropod photoreceptors on recovery from anoxia. Nature. 1976 Dec 16;264(5587):661–664. doi: 10.1038/264661a0. [DOI] [PubMed] [Google Scholar]
- Wyman J. Facilitated diffusion and the possible role of myoglobin as a transport mechanism. J Biol Chem. 1966 Jan 10;241(1):115–121. [PubMed] [Google Scholar]
- Zander R. Cellular oxygen concentration. Adv Exp Med Biol. 1976;75:463–467. doi: 10.1007/978-1-4684-3273-2_54. [DOI] [PubMed] [Google Scholar]