Results 151 to 160 of about 2,363 (170)
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The rhabdomeric microvilli of several arthropod compound eyes kept in darkness
Zeitschrift f�r Zellforschung und Mikroskopische Anatomie, 1967Electron microscopical studies were made on the fine structure of the rhabdomeric microvilli of the compound eyes of seven species of arthropods (Procambarus, Neocaridina, Caridina, Potamon, Artemia, Diestrammena, Drosophila) raised in complete darkness for 1–8 months or for successive generations, using various fixation techniques.
H, Kabuta, Y, Tominaga, M, Kuwabara
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Rhabdomeric twist in bees ? Artefact or in vivo structure?
Journal of Comparative Physiology ? A, 1981It has recently been claimed (Ribi 1979, 1980) that “bee ommatidia show no twist” and that our earlier finding of rhabdom twist in bees (Wehner et al. 1975; forMyrmecia ants see Menzel and Blakers 1975) had been due toartefactual twisting of the rhabdoms.
R�diger Wehner, Eric Meyer
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Calmodulin associated with rhabdomeral photoreceptor microvilli of arthropods and squid
Cell and Tissue Research, 1986A monoclonal antibody against pea-leaf calmodulin was used to localise this calcium-binding protein on frozen sections of compound eyes of several arthropod species and on nitrocellulose replicas of electrophoretically separated peptides of isolated photoreceptor membrane from crayfish, fly, and squid.
H. G. de Couet +2 more
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Photoreceptor membrane breakdown in the spider Dinopis: The fate of rhabdomere products
Cell and Tissue Research, 1978Photoreceptor membrane breakdown at dawn in the posterior median eyes of the spider Dinopis is described. Coated and smooth vesicles are shed into the receptor cytoplasm and are assembled into multivesicular bodies of two kinds: (i) Coated vesicles form loosely-assembled multivesicular bodies (mvbs) whose bounding membranes are derived from endoplasmic
A D, Blest, L, Kao, K, Powell
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Ultrastructure and development of the rhabdomeric eyes in Lineus viridis (Heteronemertea, Nemertea)
Zoology, 2007Nemerteans are undoubtedly members of the Spiralia, although their phylogenetic relationships are still a matter of debate. The apparently acoelomate organization suggests a relationship with the platyhelminths, whereas the blood-vascular system has been interpreted as an equivalent to coelomic cavities of annelids, indicating a close relation between ...
Jörn, von Döhren, Thomas, Bartolomaeus
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Twisted rhabdomeres in the compound eye of a tipulid fly (Diptera)
Cell and Tissue Research, 1981The individual rhabdomeres of the outer retinular cells (R 1-6) in the tipulid fly, Ptilogyna, twist about their long axes. Proximally, the rhabdoms become partitioned off by processes from the retinular cells, so that the basal region of each rhabdomere is enclosed in a "pocket" formed by its own cell (Fig. 2). This organisation of the rhabdom enables
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Drosophila Crumbs is a positional cue in photoreceptor adherens junctions and rhabdomeres
Nature, 2002Drosophila Crumbs (Crb) is required for apical-basal polarity and is an apical determinant in embryonic epithelia. Here, we describe properties of Crb that control the position and integrity of the photoreceptor adherens junction and photosensitive organ, or rhabdomere.
Izaddoost, S +4 more
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Orthogonal microvillus pattern in the eighth rhabdomere of the rock crab Grapsus
Zeitschrift f�r Zellforschung und Mikroskopische Anatomie, 1973The eighth retinular cell (R 8) of Grapsus lacks cytoplasmic pigment granules and basically resembles those previously known in the ghost crab Ocypode and the mysid Praunus. Distally located, R 8 comprises four lobes inserted between the outer ends of the seven regular retinular cells (R 1–R 7). A thin cytoplasmic bridge connects these lobes.
E, Eguchi, T H, Waterman
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Rhabdomere turnover and rhodopsin cycle: maintenance of retinula cells inDrosophila melanogaster
Journal of Neurocytology, 1988Visual receptor maintenance in Drosophila involves turnover of membrane. Coated pits derived from rhabdomere and plasmalemma, coated vesicles and multivesicular bodies (MVBs) of about 0.5 micron diameter characterize the early autophagic steps. Smaller electron dense bodies (0.15 micron) merge with MVBs.
W S, Stark, R, Sapp, D, Schilly
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Metarhodopsin in Single Rhabdomeres of the Fly, Calliphora erythrocephala
1972Stable metarhodopsin is the photoproduct of illuminated rhodopsin in the eye of Calliphora. Rhodopsin is resynthesized in darkness, evidently by chemical means dependent on energy supplied by metabolism within the retina. The thermostability of the product makes it probable that a photoreisomerization may also occur.
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