Role of carbon dioxide and ion transport in the formation of sub-embryonic fluid by the blastoderm of the Japanese quail

Latter, G.V.; Baggott, Glenn K.

doi:10.1080/00071660120109944

Cited by 21 publications

(24 citation statements)

References 46 publications

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“…The present study showed that the cell membrane of the yolk cell is apparently maintained in the oviposited egg. During the first 4 days of incubation in quails, fluid accumulates in the yolk cell with the movement from the egg white through the blastoderm (Babiker & Baggott 1995; Latter & Baggott 2002). Thus, the volume of the yolk cell doubled on day 4 of incubation.…”

Section: Discussionmentioning

confidence: 99%

Two‐step consumption of yolk granules during the development of quail embryos

et al. 2004

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The mechanism of yolk consumption was studied morphologically and biochemically in Japanese quail Coturnix japonica . The amount of yolk granules in the yolk (or 'yolk cell') decreased in two steps during embryonic development. In the first step, during days 0-4 of incubation, the yolk-granule weight decreased at a rate of 13 mg/day. This decrease was due to segregation by endodermal cells that were newly formed in the developing yolk sac. In the second step after day 6, the decrease was drastic at a rate of 29.8 mg/day during days 6-12 and very slow thereafter. The decrease at the second step was due to the enzymatic digestion of yolk granules by cathepsin D that coexisted in yolk spheres. This digesting reaction was triggered by the solubilization of the granules with high concentrations of salts that were supplied after disruption of the limiting membrane of yolk spheres. The 'yolk cell' seemed to die around day 5 of incubation. Thus the digestion products might be taken up together with yolk lipids by endocytosis into the endodermal cells and transported to blood vessels.

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Section: Discussionmentioning

confidence: 99%

Two‐step consumption of yolk granules during the development of quail embryos

et al. 2004

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“…The early liquefaction of the albumen also facilitates the movement of various nutrients from the albumen towards the embryo (Burley and Vadehra, 1989) and also reduces any physical barrier to O 2 diffusion to the embryo (Meuer and Baumann, 1988). Latter and Baggott (2002) have demonstrated in vitro using quail embryos that CO 2 has a role in the formation of the sub-embryonic fluid (SEF) during early incubation. Deeming (1989) reported that the formation of the SEF has a pivotal role in the survival of the embryo.…”

Section: Role Of Gaseous Exchange In Egg Storage and Incubation: O Omentioning

confidence: 99%

Gas exchange during storage and incubation of Avian eggs: effects on embryogenesis, hatchability, chick quality and post-hatch growth

Onagbesan

Bruggeman

Smit

et al. 2007

World's Poultry Science Journal

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Embryonic development is a dynamic process that requires a fine balance between several factors in order to achieve an optimum hatchability and chick quality. These factors include the background of the embryo, such as genetic line of the breeders, the age of the breeder, egg weight, and factors related to the environment in which the egg is stored and incubated, such as temperature, humidity, gas levels and altitude. Gas exchanges are of fundamental importance for embryonic development during incubation and may affect the livability of the embryo. This paper reviews the roles of the gaseous environment (i.e. O 2 and CO 2 ) around hatching eggs during storage and during incubation and the effect it might have on the survival of the developing embryos and the chicks that hatch. The state of the art on the different attempts to establish the optimum requirements of different gases that promote the optimal developmental trajectories at different periods during incubation is presented. The roles and consequences of different levels of O 2 and CO 2 during storage and incubation on hatchability, incubation duration, hatching process, embryo growth, embryo mortality, organ development and morphology, metabolism, blood acid-base balance, chick quality and chick post-hatch growth are reviewed.

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“…Then, the avascular chorion that develops later in the rear of the yolk sac comes into direct contact with the limiting membrane. Along with these processes, the water in the egg white moves into the yolk sac through the blastoderm (Babiker and Baggott, 1995;Latter and Baggott, 2002), doubling the volume of the yolk cell (Yoshizaki et al, 2004b) and pushing the chorion from the interior against the limiting membrane. Such a close apposition of the avascular chorion and the limiting membrane could maintain the highest concentration of secreted enzyme at the membrane and lead to effective digestion.…”

Section: Discussionmentioning

confidence: 99%

A possible role of chorion protease in shell membrane degradation during development of quail embryos

et al. 2009

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In the eggs of the quail Coturnix japonica, the limiting membrane demarcates the shell membrane at the interface with the albumen and decreases in width during the hatching process. This study was done to identify agents that affect the width of this limiting membrane. Zymography tests on extracts from extraembryonic tissues, yolk sacs, or chorioallantoic membranes, or all three, showed proteolytic activities during d 4 to 10 of incubation. Localization experiments on these activities, performed on d 5 eggs, indicated that they were located in an avascular chorion. Electron microscopic analysis showed there were secretory cells specifically located in the avascular chorion. After partial purification of d 5 avascular chorion extracts using QA52 and Sephadex G-200 column chromatography, the proteolytic activity of 20 kDa was isolated. The protease showed a high level of activity toward succinyl-Gly-Pro-Leu-Gly-Pro-4-methylcoumaryl-7-amide. It had an optimal pH of 9 and digested the limiting membrane. These enzymatic activities were inhibited moderately by EDTA and strongly by leupeptin and aprotinin. It was concluded that it is the 20-kDa protease, showing collagenase-like activity produced by the avascular chorion, that affects the limiting membrane.

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Role of carbon dioxide and ion transport in the formation of sub-embryonic fluid by the blastoderm of the Japanese quail

Cited by 21 publications

References 46 publications

Two‐step consumption of yolk granules during the development of quail embryos

Two‐step consumption of yolk granules during the development of quail embryos

Gas exchange during storage and incubation of Avian eggs: effects on embryogenesis, hatchability, chick quality and post-hatch growth

A possible role of chorion protease in shell membrane degradation during development of quail embryos

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