Dietary calcium deficiency in laying ducks impairs eggshell quality by suppressing shell biomineralization
文献类型: 外文期刊
第一作者: Chen, Wei
作者: Chen, Wei;Zhao, Fei;Tian, Zhi Mei;Zhang, Han Xing;Ruan, Dong;Li, Yan;Wang, Shuang;Zheng, Chun Tian;Lin, Ying Cai;Chen, Wei;Zhao, Fei;Tian, Zhi Mei;Zhang, Han Xing;Ruan, Dong;Li, Yan;Wang, Shuang;Zheng, Chun Tian;Lin, Ying Cai;Chen, Wei;Zhao, Fei;Tian, Zhi Mei;Zhang, Han Xing;Ruan, Dong;Li, Yan;Wang, Shuang;Zheng, Chun Tian;Lin, Ying Cai;Chen, Wei;Zhao, Fei;Tian, Zhi Mei;Zhang, Han Xing;Ruan, Dong;Li, Yan;Wang, Shuang;Zheng, Chun Tian;Lin, Ying Cai;Chen, Wei;Zhao, Fei;Tian, Zhi Mei;Zhang, Han Xing;Ruan, Dong;Li, Yan;Wang, Shuang;Zheng, Chun Tian;Lin, Ying Cai
作者机构:
关键词: Calcium;Laying ducks;Eggshell microarchitecture;Eggshell biomineralization
期刊名称:JOURNAL OF EXPERIMENTAL BIOLOGY ( 影响因子:3.312; 五年影响因子:3.828 )
ISSN:
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收录情况: SCI
摘要: The objective of this study was to determine the effects of dietary calcium deficiency on the process of shell formation. Four hundred and fifty female ducks (Anas platyrhynchos) at 22 weeks were randomly assigned to three groups. Ducks were fed one of two calcium-deficient diets (containing 1.8% or 0.38% calcium, respectively) or a calcium-adequate control diet (containing 3.6% calcium) for 67 days (depletion period) and then all ducks were fed a calcium-adequate diet for an additional 67 days (repletion period). Compared with the calcium-adequate control, the average shell thickness, egg shell weight, breaking strength, mammillae density and mammillary knob thickness of shell from ducks that consumed the diet with 0.38% calcium were significantly decreased (P<0.05) during the depletion period, accompanied by reduced tibia quality. The mRNA expression of both secreted phosphoprotein 1 (SPP1) and carbonic anhydrase 2 (CA2) in the uterus was decreased after feeding calcium-deficient diets (1.8% or 0.38% calcium). mRNA transcripts of calbindin 1 (CALB1), an important protein responsible for calcium transport, and the matrix protein genes ovocalyxin-32 (OCX-32) and ovocleidin-116 (OC-116) were reduced in ducks fed 0.38% calcium but not 1.8% calcium. Plasma estradiol concentration was decreased by both of the calcium-deficient diets (P<0.05). The impaired shell quality and suppressed functional proteins involved in shell formation could be reversed by repletion of dietary calcium. The results of the present study suggest that dietary calcium deficiency negatively affects eggshell quality and microarchitecture, probably by suppressing shell biomineralization.
分类号: Q-33
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