VIRUS-LIKE PARTICLES IN CELLS ASSOCIATED WITH SENSILLA IN HEAD APPENDAGES OF A DYTISCID BEETLE

Citation
Ry. Zacharuk et al., VIRUS-LIKE PARTICLES IN CELLS ASSOCIATED WITH SENSILLA IN HEAD APPENDAGES OF A DYTISCID BEETLE, Canadian journal of zoology, 70(1), 1992, pp. 67-70
Citations number
14
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Zoology
Journal title
ISSN journal
0008-4301
Volume
70
Issue
1
Year of publication
1992
Pages
67 - 70
Database
ISI
SICI code
0008-4301(1992)70:1<67:VPICAW>2.0.ZU;2-U
Abstract
Two types of viruslike particles (VLP) were noted in the cytoplasm of cells associated with sensilla on the antennae and labial palps of the diving beetle Graphoderus occidentalis Horn. The most common "hollow" particle was 30-32 nm in diameter with an electron-dense shell about 8 nm thick and, in some cases, a dense core granule about 5.6 nm in di ameter. These VLP were always tightly packed in orderly arrays in appa rently icosahedral clusters. Such clusters occurred in the perikarya o f multiterminal type II neurons and glial cells in the labial nerves, bipolar type I neurons and inner sheath cells of mechano- and chemo-se nsilla on both appendages, adjacent epidermal cells, and an axon from an antennal sensillum. A second type of VLP was dense-cored and about 22 nm in diameter. This type was scattered individually or in loose, u nordered clusters in a type I sensillar neuron. Both VLP types were cl osely associated with ribosomes. Some minor cytopathic changes in the contents of cells containing VLP, and the occurrence of VLP as manifes tations of physiological stress rather than as infective virions, are discussed.