Lu Ming-Yuan, Xu Li, Qi Guang-Hai, Zhang Hai-Jun, Qiu Kai, Wang Jing, Wu Shu-Geng
Laboratory of Quality & Safety Risk Assessment for Animal Products on Feed Hazards (Beijing) of the Ministry of Agriculture & Rural Affairs, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China; College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150030, China.
Poult Sci. 2021 Aug;100(8):101273. doi: 10.1016/j.psj.2021.101273. Epub 2021 May 21.
Eggshell color is an important shell quality trait that influences consumer preference. It is also of particular importance with respect to sexual signaling and the physiological and mechanical properties of shell pigment. Pigments include protoporphyrin IX, biliverdin, and traces of biliverdin zinc chelates, with brown eggs being notably rich in protoporphyrin IX, the synthesis of which has a marked effect on the intensity of brown eggshell color. This pigment is initially synthesized in the eggshell gland within the oviduct of laying hens and is subsequently deposited throughout the cuticular and calcareous layers of brown eggshell. In this review, we describe the factors affecting brown eggshell color and potential targets for the regulation of pigment synthesis. Protoporphyrin IX synthesis might be compromised by synthetase-mediated pigment synthesis, the redox status of the female birds, and regulation of the nuclear transcription factors associated with δ-aminolevulinic acid synthetase1. We believe that this review will provide a valuable reference for those engaged in studying eggshell depigmentation.
蛋壳颜色是影响消费者偏好的重要蛋壳品质性状。它在性信号以及蛋壳色素的生理和机械性能方面也尤为重要。色素包括原卟啉IX、胆绿素和痕量的胆绿素锌螯合物，其中褐壳蛋富含原卟啉IX，其合成对褐壳蛋颜色的深浅有显著影响。这种色素最初在产蛋母鸡输卵管内的蛋壳腺中合成，随后沉积在褐壳蛋的角质层和钙质层中。在这篇综述中，我们描述了影响褐壳蛋颜色的因素以及色素合成调控的潜在靶点。原卟啉IX的合成可能会受到合成酶介导的色素合成、雌鸟的氧化还原状态以及与δ-氨基乙酰丙酸合成酶1相关的核转录因子调控的影响。我们相信，这篇综述将为从事蛋壳色素脱失研究的人员提供有价值的参考。
