Influence of dietary osteolathyrogens on the ultrastructure of shell and membranes of eggs from laying hens.

1. Laying hens were fed osteolathyrogens, either semicarbazide hydrochloride at 0.3 g/kg or beta-aminopropionitrile fumarate at 0.6 g/kg, to examine their effects upon the ultrastructure of shell and shell membranes by scanning electron microscopy. 2. Effects of the 2 lathyrogens were similar. Compared with the highly-branched network of fine fibres in normal membranes, there is widespread lack of separation of fibres in lathyritic specimens and hence, uneven distribution of nucleation sites. Pores are also uneven in size and distribution, which can account for increased permeability. 3. Establishment between shell and membranes is reduced. Within the cone layer both type A and type B mammillary bodies occur. Large interstitial spaces and late fusion of the palisade layer indicate reduced resistance to fracture.

[1]  J. Örberg.  Relationship between the shell membrane‐shell bond and shell deformation in hens’ eggs , 1990 .

[2]  S. Chowdhury,et al.  Comparison of the effects of two lathyrogens on the reproductive system of the laying hen , 1989, The Veterinary Record.

[3]  S. Chowdhury,et al.  Lathyrism in laying hens and increases in egg weight , 1988, The Veterinary Record.

[4]  S. D. Chowdhury.  Lathyrism in poultry—a review , 1988 .

[5]  R. Leach,et al.  The effect of manganese deficiency upon the ultrastructure of the eggshell. , 1983, Poultry science.

[6]  G. Combs,et al.  Role of Ultrastructure in Determining Eggshell Strength , 1982 .

[7]  R. Rucker,et al.  Egg shell membrane protein: a nonelastin desmosine/isodesmosine-containing protein. , 1981, Archives of biochemistry and biophysics.

[8]  R. Leach,et al.  Copper deficiency in the laying hen. , 1978, The Journal of nutrition.

[9]  S. Fujii.  Further Morphological Studies on the Formation and Structure of Hen's Eggshell by Scanning Electron Microscopy , 1974 .

[10]  S. Fujii,et al.  Scanning Electron Microscopy of Shell Formation in Hen's Eggs , 1970 .

[11]  G. Martin,et al.  The cross-linking of collagen and elastin: enzymatic conversion of lysine in peptide linkage to alpha-aminoadipic-delta-semialdehyde (allysine) by an extract from bone. , 1968, Proceedings of the National Academy of Sciences of the United States of America.

[12]  B. D. Barnett,et al.  Effect of Beta-Aminopropionitrile on Reproduction of Chickens.∗ , 1957, Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine.

[13]  S. Solomon.  Egg and Eggshell Quality , 1997 .

[14]  Sachchidananda D Chodhury.  Effects of feeding semicarbazide to laying hens , 1991 .

[15]  Sachchidananda D Chowdhuryc.  Effects of low and high dietary levels of beta‐aminopropionitrile (BAPN) on the performance of laying chickens , 1990 .

[16]  P. Simons.  Ultrastructure of the hen eggshell and its physiological interpretation , 1971 .

[17]  D. Bannister,et al.  Some effects of feeding lathyrogens to laying fowls. , 1971, British poultry science.