Enzymatic patterns in the embryonic development of the cricket,Acheta domesticus L.

Rudolf K. Achazi; Franz Duspiva

doi:10.1007/bf00634063

WATER ABSORPTION BY THE EGGS OF CRICKETS

Canadian Journal of Zoology ◽

10.1139/z59-046 ◽

1959 ◽

Vol 37 (4) ◽

pp. 391-399 ◽

Cited By ~ 20

Author(s):

J. E. McFarlane ◽

A. S. K. Ghouri ◽

C. P. Kennard

Keyword(s):

Embryonic Development ◽

Water Absorption ◽

Acheta Domesticus ◽

Early Embryonic Development ◽

Embryonic Stage ◽

Distilled Water ◽

Rapid Loss ◽

Incubation Periods ◽

Maximal Absorption ◽

Gryllodes Sigillatus

Absorption of water by the eggs of Acheta configuratus, Gryllodes sigillatus, and a Canadian and a Pakistani strain of Acheta domesticus takes place during early embryonic development. The amount of water absorbed varies from about 60 to 120% of the weight of newly laid eggs, depending on the species or strain. The time of absorption is generally earlier the more rapid is embryonic development, indicating that the embryonic stage during which water is absorbed is similar in all forms. Absorption is more rapid at 33 than at 28 °C. In all forms, a small but rapid loss in water occurs just after maximal absorption; this loss takes place also when the eggs are immersed in distilled water. The incubation periods of the four forms at various temperatures (28–38 °C) are presented.

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FURTHER OBSERVATIONS ON WATER ABSORPTION BY THE EGGS OF ACHETA DOMESTICUS (L.)

Canadian Journal of Zoology ◽

10.1139/z60-008 ◽

1960 ◽

Vol 38 (1) ◽

pp. 77-85 ◽

Cited By ~ 14

Author(s):

J. E. McFarlane ◽

C. P. Kennard

Keyword(s):

Embryonic Development ◽

Water Absorption ◽

Water Loss ◽

Acheta Domesticus ◽

Entire Surface ◽

Maximal Absorption

Eggs of Acheta domesticus (L.) absorb water during the stage of embryonic development in which the serosa surrounds the embryo and yolk. Water is absorbed over the entire surface of the shell. The egg membranes are more permeable to water, as shown by water loss in an unsaturated atmosphere, during the period of water absorption than either before or after; they are also permeable to dyes during the period of water absorption. The mechanism of water absorption is discussed. A possible explanation is presented for water loss after maximal absorption has occurred.

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PERMEABILITY OF THE EGG SHELL OF ACHETA DOMESTICUS (L.), AND THE FATE OF THE VITELLINE MEMBRANE

Canadian Journal of Zoology ◽

10.1139/z60-107 ◽

1960 ◽

Vol 38 (6) ◽

pp. 1037-1039 ◽

Cited By ~ 8

Author(s):

J. E. McFarlane

Keyword(s):

Embryonic Development ◽

Water Absorption ◽

Acheta Domesticus ◽

Vitelline Membrane ◽

Egg Shell

The egg shell of Acheta domesticus (L.) is permeable to dyes in the interval between the fragmentation of the endochorion and the secretion of the lipoid layer of the serosal cuticle, i.e. at the beginning of the water absorption period. The vitelline membrane persists throughout the whole of embryonic development, lying between the aforementioned layers from the beginning of water absorption.

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Electron investigations of rhabdovirus-like particles in mexican bean beetles and crickets

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100082753 ◽

1978 ◽

Vol 36 (2) ◽

pp. 378-379

Author(s):

J. R. Adams ◽

G. J Tompkins ◽

A. M. Heimpel ◽

E. Dougherty

Keyword(s):

Biological Control ◽

Integrated Pest Management ◽

Pest Management ◽

Developmental Stages ◽

Management Program ◽

Acheta Domesticus ◽

Epilachna Varivestis ◽

House Cricket ◽

Similar Morphology ◽

Bean Beetle

As part of a continual search for potential pathogens of insects for use in biological control or on an integrated pest management program, two bacilliform virus-like particles (VLP) of similar morphology have been found in the Mexican bean beetle Epilachna varivestis Mulsant and the house cricket, Acheta domesticus (L. ).Tissues of diseased larvae and adults of E. varivestis and all developmental stages of A. domesticus were fixed according to procedures previously described. While the bean beetles displayed no external symptoms, the diseased crickets displayed a twitching and shaking of the metathoracic legs and a lowered rate of activity.Examinations of larvae and adult Mexican bean beetles collected in the field in 1976 and 1977 in Maryland and field collected specimens brought into the lab in the fall and reared through several generations revealed that specimens from each collection contained vesicles in the cytoplasm of the midgut filled with hundreds of these VLP's which were enveloped and measured approximately 16-25 nm x 55-110 nm, the shorter VLP's generally having the greater width (Fig. 1).

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Live Confocal Analysis of Fertilization and Early Development

Microscopy and Microanalysis ◽

10.1017/s1431927600031135 ◽

2001 ◽

Vol 7 (S2) ◽

pp. 1012-1013

Author(s):

Uyen Tram ◽

William Sullivan

Keyword(s):

Drosophila Melanogaster ◽

Embryonic Development ◽

Real Time ◽

Early Development ◽

Fluorescent Probes ◽

Primary Defect ◽

Fluorescent Analysis ◽

Dynamic Event ◽

Enormous Amount ◽

Fluorescent Studies

Embryonic development is a dynamic event and is best studied in live animals in real time. Much of our knowledge of the early events of embryogenesis, however, comes from immunofluourescent analysis of fixed embryos. While these studies provide an enormous amount of information about the organization of different structures during development, they can give only a static glimpse of a very dynamic event. More recently real-time fluorescent studies of living embryos have become much more routine and have given new insights to how different structures and organelles (chromosomes, centrosomes, cytoskeleton, etc.) are coordinately regulated. This is in large part due to the development of commercially available fluorescent probes, GFP technology, and newly developed sensitive fluorescent microscopes. For example, live confocal fluorescent analysis proved essential in determining the primary defect in mutations that disrupt early nuclear divisions in Drosophila melanogaster. For organisms in which GPF transgenics is not available, fluorescent probes that label DNA, microtubules, and actin are available for microinjection.

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