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Lugata JK, Ndunguru SF, Reda GK, Ozsváth XE, Angyal E, Czeglédi L, Gulyás G, Knop R, Oláh J, Mészár Z, Varga R, Csernus B, Szabó C. Methionine sources and genotype affect embryonic intestinal development, antioxidants, tight junctions, and growth-related gene expression in chickens. Anim Nutr 2024; 16:218-230. [PMID: 38362512 PMCID: PMC10867599 DOI: 10.1016/j.aninu.2023.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 11/25/2023] [Accepted: 11/28/2023] [Indexed: 02/17/2024]
Abstract
Methionine (Met) is an essential and first limiting amino acid in the poultry diet that plays a significant role in chicken embryonic development and growth. The present study examined the effect of in ovo injection of DL-Met and L-Met sources and genotypes on chicken embryonic-intestinal development and health. Fertilized eggs of the two genotypes, TETRA-SL layer hybrid (TSL) - commercial layer hybrid and Hungarian Partridge colored hen breed (HPC) - a native genotype, were randomly distributed into four treatments for each genotype. The treatment groups include the following: 1) control non-injected eggs (NoIn); 2) saline-injected (SaIn); 3) DL-Met injected (DLM); and 4) L-Met injected (LM). The in ovo injection was carried out on 17.5 d of embryonic development; after hatching, eight chicks per group were sacrificed, and the jejunum was extracted for analysis. The results showed that both DLM and LM groups had enhanced intestinal development as evidenced by increased villus width, villus height, and villus area (P < 0.05) compared to the control. The DLM group had significantly reduced crypt depth, glutathione content (GSH), glutathione S-transferase 3 alpha (GST3), occludin (OCLN) gene expression and increased villus height to crypt depth ratio in the TSL genotype than the LM group (P < 0.05). The HPC genotype has overexpressed insulin-like growth factor 1 (IGF1) gene, tricellulin (MD2), occludin (OCLN), superoxide dismutase 1 (SOD1), and GST3 genes than the TSL genotype (P < 0.05). In conclusion, these findings showed that in ovo injection of Met enhanced intestinal development, and function, with genotypes responding differently under normal conditions. Genotypes also influenced the expression of intestinal antioxidants, tight junction, and growth-related genes.
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Affiliation(s)
- James K. Lugata
- Department of Animal Nutrition and Physiology, Faculty of Agriculture and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
- Faculty of Agriculture and Food Sciences and Environmental Management, Doctoral School of Animal Science, University of Debrecen, Debrecen, Hungary
| | - Sawadi F. Ndunguru
- Department of Animal Husbandry, Faculty of Agriculture and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
- Faculty of Agriculture and Food Sciences and Environmental Management, Doctoral School of Animal Science, University of Debrecen, Debrecen, Hungary
- Department of Evolutionary Zoology and Human Biology, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary
| | - Gebrehaweria K. Reda
- Department of Animal Husbandry, Faculty of Agriculture and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
- Faculty of Agriculture and Food Sciences and Environmental Management, Doctoral School of Animal Science, University of Debrecen, Debrecen, Hungary
- Department of Evolutionary Zoology and Human Biology, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary
| | - Xénia E. Ozsváth
- Department of Animal Husbandry, Faculty of Agriculture and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
| | - Eszter Angyal
- Department of Animal Husbandry, Faculty of Agriculture and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
| | - Levente Czeglédi
- Department of Animal Husbandry, Faculty of Agriculture and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
| | - Gabriella Gulyás
- Department of Animal Husbandry, Faculty of Agriculture and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
| | - Renáta Knop
- Department of Animal Husbandry, Faculty of Agriculture and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
| | - János Oláh
- Institutes for Agricultural Research and Educational Farm, University of Debrecen, Debrecen, Hungary
| | - Zoltán Mészár
- Department of Anatomy, Histology and Embryology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Rita Varga
- Department of Anatomy, Histology and Embryology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Brigitta Csernus
- Department of Evolutionary Zoology and Human Biology, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary
| | - Csaba Szabó
- Department of Animal Nutrition and Physiology, Faculty of Agriculture and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
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Yuan PQ, Lin S, Peng JY, Li YX, Liu YH, Wang P, Zhong HJ, Yang XM, Che LQ, Feng B, Batonon-Alavo DI, Mercier Y, Zhang XL, Lin Y, Xu SY, Li J, Zhuo Y, Wu D, Fang ZF. Effects of dietary methionine supplementation from different sources on growth performance and meat quality of barrows and gilts. Animal 2023; 17:100986. [PMID: 37820406 DOI: 10.1016/j.animal.2023.100986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 08/29/2023] [Accepted: 09/07/2023] [Indexed: 10/13/2023] Open
Abstract
Methionine is indispensable for growth and meat formation in pigs. However, it is still unclear that increasing dietary sulphur-containing amino acid (SAA) levels using different methionine sources affects the growth performance and meat quality of barrows and gilts. To investigate this, 144 pigs (half barrows and half gilts) were fed the control (100% SAA, CON), DL-Methionine (125% SAA, DL-Met)-supplemented, or OH-Methionine (125% SAA, OH-Met)-supplemented diets during the 11-110 kg period. The results showed that plasma methionine levels varied among treatments during the experimental phase, with increased plasma methionine levels observed following increased SAA consumption during the 25-45 kg period. In contrast, pigs fed the DL-Met diet had lower plasma methionine levels than those fed the CON diet (95-110 kg). Additionally, gilts fed the DL-Met or OH-Met diets showed decreased drip loss in longissimus lumborum muscle (LM) compared to CON-fed gilts. OH-Met-fed gilts had higher pH45min values than those fed the CON or DL-Met diets, whereas OH-Met-fed barrows had higher L45min values than those fed the CON or DL-Met diets. Moreover, increased consumption of SAA, regardless of the methionine source, tended to decrease the shear force of the LM in pigs. In conclusion, this study indicates that increasing dietary levels of SAA (+25%) appeared to improve the meat quality of gilts by decreasing drip loss and increasing meat tenderness.
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Affiliation(s)
- P Q Yuan
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, People's Republic of China; Key Laboratory of Agricultural Product Processing and Nutrition Health (Co-construction by Ministry and Province), Ministry of Agriculture and Rural Affairsand, College of Food Science, Sichuan Agricultural University, Ya'an 625014, People's Republic of China
| | - S Lin
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, People's Republic of China; Key Laboratory of Urban Agriculture in South China, Sericultural & Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, People's Republic of China
| | - J Y Peng
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Y X Li
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Y H Liu
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - P Wang
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - H J Zhong
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - X M Yang
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - L Q Che
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - B Feng
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | | | - Y Mercier
- Adisseo France S.A.S, CERN, Commentry, France
| | - X L Zhang
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Y Lin
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - S Y Xu
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - J Li
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Y Zhuo
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - D Wu
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, People's Republic of China
| | - Z F Fang
- Key Laboratory for Animal Disease Resistance Nutrition of the Ministry of Education, Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, People's Republic of China; Key Laboratory of Agricultural Product Processing and Nutrition Health (Co-construction by Ministry and Province), Ministry of Agriculture and Rural Affairsand, College of Food Science, Sichuan Agricultural University, Ya'an 625014, People's Republic of China.
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Zhang Y, Zhuang Z, Mahmood T, Mercier Y, Jin Y, Huang X, Li K, Wang S, Xia W, Wang S, Yu M, Chen W, Zheng C. Dietary supplementation with 2-hydroxy-4-methyl(thio) butanoic acid and DL-methionine improves productive performance, egg quality and redox status of commercial laying ducks. Anim Nutr 2023; 14:101-110. [PMID: 37388162 PMCID: PMC10300065 DOI: 10.1016/j.aninu.2023.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 03/09/2023] [Accepted: 04/13/2023] [Indexed: 07/01/2023]
Abstract
This experiment aimed to study the effects of supplemental methionine sources, 2-hydroxy-4 methyl(thio) butanoic acid (HMTBa) and DL-Methionine (DL-Met), on productive performance, egg quality, and redox status of laying ducks. A total of 792 healthy 25-wk-old Longyan laying ducks with similar body weights were randomly allotted to 11 treatment groups. Each treatment group had 6 replicates of 12 ducks. The trial lasted for 16 wk. Ducks were fed a basal deficient diet (Met: 0.24%; Met + Cys: 0.51%) or supplemented with DL-Met or HMTBa at 0.05%, 0.12%, 0.19%, 0.26%, and 0.33% of diet, respectively. Compared with the basal diet, supplementation with either DL-Met or HMTBa increased the average egg weight, egg mass, and decreased feed to egg ratio during the whole trial period (P < 0.05). Albumen weight and its ratio to total egg weight were increased, but yolk and shell ratio, albumen height, Haugh unit and shell breaking strength were decreased (P < 0.05). Dietary DL-Met or HMTBa supplementation increased taurine, methionine, leucine, tryptophan and arginine content, and decreased serine and lysine content in plasma (P < 0.05). The redox status of laying ducks was improved by enhancing the glutathione peroxidase and catalase activities, glutathione content and its ratio relative to glutathione (oxidized) content and decreasing malondialdehyde content and increasing mRNA expression of superoxide dismutase-1, glutathione peroxidase-1, hemeoxygenase-1 and nuclear factor-like 2 in liver and ileum with the supplementation of DL-Met or HMTBa (P < 0.05). Liver health status measured by average area proportion lipid droplet was improved with supplementation of DL-Met or HMTBa (P < 0.05). Villus height and villus height to crypt depth ratio in the ileum and the ileal gene expression of tight junction protein and occludin were increased with DL-Met or HMTBa supplementation (P < 0.05). Taken together, these results suggested that the efficacy of dietary supplementation of HMTBa was similar to DL-Met, and it ranged from 98% to 100% for productive performance and egg albumen ratio in laying ducks (25 to 41 wk).
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Affiliation(s)
- Yanan Zhang
- Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Key Laboratory of Animal Nutrition and Feed Science (South China) of Ministry of Agriculture, State Key Laboratory of Livestock and Poultry Breeding, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, 510640, Guangzhou, China
| | - Zhiwei Zhuang
- Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Key Laboratory of Animal Nutrition and Feed Science (South China) of Ministry of Agriculture, State Key Laboratory of Livestock and Poultry Breeding, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, 510640, Guangzhou, China
- Institute of Life Science and Engineering, Foshan University, 528200, Foshan, China
| | - Tahir Mahmood
- Adisseo France S.A.S. Centre of Excellence and Research in Nutrition, Commentry, France
| | - Yves Mercier
- Adisseo France S.A.S. Centre of Excellence and Research in Nutrition, Commentry, France
| | - Yongyan Jin
- Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Key Laboratory of Animal Nutrition and Feed Science (South China) of Ministry of Agriculture, State Key Laboratory of Livestock and Poultry Breeding, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, 510640, Guangzhou, China
| | - Xuebing Huang
- Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Key Laboratory of Animal Nutrition and Feed Science (South China) of Ministry of Agriculture, State Key Laboratory of Livestock and Poultry Breeding, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, 510640, Guangzhou, China
| | - Kaichao Li
- Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Key Laboratory of Animal Nutrition and Feed Science (South China) of Ministry of Agriculture, State Key Laboratory of Livestock and Poultry Breeding, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, 510640, Guangzhou, China
| | - Shuang Wang
- Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Key Laboratory of Animal Nutrition and Feed Science (South China) of Ministry of Agriculture, State Key Laboratory of Livestock and Poultry Breeding, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, 510640, Guangzhou, China
| | - Weiguang Xia
- Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Key Laboratory of Animal Nutrition and Feed Science (South China) of Ministry of Agriculture, State Key Laboratory of Livestock and Poultry Breeding, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, 510640, Guangzhou, China
| | - Shenglin Wang
- Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Key Laboratory of Animal Nutrition and Feed Science (South China) of Ministry of Agriculture, State Key Laboratory of Livestock and Poultry Breeding, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, 510640, Guangzhou, China
| | - Miao Yu
- Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Key Laboratory of Animal Nutrition and Feed Science (South China) of Ministry of Agriculture, State Key Laboratory of Livestock and Poultry Breeding, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, 510640, Guangzhou, China
| | - Wei Chen
- Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Key Laboratory of Animal Nutrition and Feed Science (South China) of Ministry of Agriculture, State Key Laboratory of Livestock and Poultry Breeding, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, 510640, Guangzhou, China
| | - Chuntian Zheng
- Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Key Laboratory of Animal Nutrition and Feed Science (South China) of Ministry of Agriculture, State Key Laboratory of Livestock and Poultry Breeding, Guangdong Public Laboratory of Animal Breeding and Nutrition, Guangdong Key Laboratory of Animal Breeding and Nutrition, 510640, Guangzhou, China
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Lv H, An J, Li F, Zhang Y. DL-Methionine-Mediated Reversible Deactivation Radical Polymerization of Styrene and Methyl Methacrylate. Macromol Rapid Commun 2023:e2300028. [PMID: 37014235 DOI: 10.1002/marc.202300028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 03/23/2023] [Indexed: 04/05/2023]
Abstract
Reversible deactivation radical polymerization (RDRP) is a facile and highly efficient technique for the synthesis of well-defined polymer with precise structure. DL-Methionine (Met) as a RDRP control agent is described and assessed for RDRP of styrene (St) and methyl methacrylate (MMA) with AIBN as radical initiator at 75 °C, which enables for excellcent control of this polymerization. The addition of DL- Methionine significantly decreased the dispersity (Đ) of the polymers for both monomers and first-order linear kinetic plots of PMMA are observed in DMSO. Considering the heat resistance of DL-Methionine, kinetic studies indicate that polymerization develops at a faster rate at higher reaction temperature (100 °C) with the same DL-Methionine content. Well-defined PMMA-block-PSt was successfully achieved by the chain extension reaction which demonstrates the high end fidelities of this polymerization approach. The system allows the use of DL-Methionine, a rich source and easily synthesized agent, to mediate RDRP strategy. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Hanyu Lv
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, China
| | - Jiaqi An
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, China
| | - Fanfan Li
- School of Chemical and Printing-Dyeing Engineering, Henan University of Engineering, Zhengzhou, China
| | - Yanwu Zhang
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, China
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Becquet P, Vazquez-Anon M, Mercier Y, Batonon-Alavo DI, Yan F, Wedekind K, Mahmood T. Absorption of methionine sources in animals-is there more to know? Anim Nutr 2023; 12:159-70. [PMID: 36712403 DOI: 10.1016/j.aninu.2022.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 07/18/2022] [Accepted: 09/21/2022] [Indexed: 02/01/2023]
Abstract
This literature review evaluates the absorption of methionine (Met) sources such as 2-hydroxy-4-methylthiobutyric acid (HMTBa), its calcium salts (HMTBa-Ca), and DL-methionine (DL-Met) by focusing on the state of knowledge regarding the absorption mechanism, experimental methodology, and factors affecting their absorption. The 2 Met sources differ in mechanism and site of absorption due to differences in their chemical characteristics and enzymatic conversion. This review addresses diffusion- and transport-mediated absorption systems for amino acids and carboxylic compounds, best elucidated by in vitro, ex vivo, and in vivo experimental models. Opportunities and limitations in the use of radioisotopes to depict absorption sites as well as host and microbial metabolism are described. Physiological and environmental conditions that lead to changes in gut absorptive capacity and the impact of Met source absorption are also evaluated. This review concludes that any comparison between HMTBa and DL-Met should consider their different behaviors during the absorption phase. Hence, the chemical characteristics of these 2 molecules entail different absorption sites and mechanisms, from passive absorption in the case of HMTBa and HMTBa-Ca to active transporters for DL-Met, HMTBa, and HMTBa-Ca. In addition, the different conversion modes of these 2 molecules further differentiate their absorption modes. Considering these important differences, it is easier to understand the apparent divergence between the conclusions of existing publications. When comparing these 2 molecules, it is recommended to properly adapt to the conditions under which the absorption of Met sources is evaluated.
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Albrecht A, Herbert U, Miskel D, Heinemann C, Braun C, Dohlen S, Zeitz JO, Eder K, Saremi B, Kreyenschmidt J. Effect of methionine supplementation in chicken feed on the quality and shelf life of fresh poultry meat. Poult Sci 2018; 96:2853-2861. [PMID: 28419366 DOI: 10.3382/ps/pex071] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 03/20/2017] [Indexed: 11/20/2022] Open
Abstract
The aim of this study was to investigate the influence of different methionine sources and concentrations on the quality and spoilage process of broiler meat. The trial was comprised of 7 treatment groups: one basal group (suboptimal in Methionine+Cysteine; i.e., 0.89, 0.74, 0.69% in DM SID Met+Cys in starter, grower, and finisher diets, respectively) and 3 doses (0.10, 0.25, and 0.40%) of either DL-Methionine (DLM) or DL-2-hydroxy-4-methylthio butanoic acid (DL-HMTBA) on an equimolar basis of the DLM-supplemented groups. The broilers were fed the diets for 35 d, then slaughtered and processed. The filets were aerobically packed and stored under temperature controlled conditions at 4°C. Meat quality investigations were comprised of microbial investigations (total viable count and Pseudomonas spp.), pH and drip loss measurements of the filets. The shelf life of the meat samples was determined based on sensory parameters. After slaughtering, all supplemented meat samples showed a high quality, whereby no differences between the 2 methionine sources could be detected for the microbial load, pH, and drip loss. In comparison to the control group, the supplemented samples showed a higher sensory quality, characterized by a fresh smell and fresh red color. Methionine supplementation had a significant influence on meat quality parameters during storage. The microbial load, pH and drip loss of the chicken filets were positively correlated to the methionine concentration. Additionally, the microbial load at the end of storage was positively correlated to pH and drip loss values. Nevertheless, the microbial parameters were in a normal range and the positive correlation to methionine concentration did not affect the sensory shelf life. The mean sensory shelf life of the broiler filets varied between 7 to 9 d. During storage, no difference in the development of sensory parameters was observed between the supplemented groups, while the spoilage process of the basal group occurred slightly faster. In conclusion, methionine concentration, but not methionine source, effected meat quality parameters in breast muscles of broilers.
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Affiliation(s)
- Antonia Albrecht
- Institute for Nutritional and Food Sciences, Katzenburgweg 7-9, 53115 Bonn, Germany
| | - Ulrike Herbert
- Institute for Nutritional and Food Sciences, Katzenburgweg 7-9, 53115 Bonn, Germany
| | - Dennis Miskel
- Institute for Nutritional and Food Sciences, Katzenburgweg 7-9, 53115 Bonn, Germany
| | - Celine Heinemann
- Institute for Nutritional and Food Sciences, Katzenburgweg 7-9, 53115 Bonn, Germany
| | - Carina Braun
- Institute for Nutritional and Food Sciences, Katzenburgweg 7-9, 53115 Bonn, Germany
| | - Sophia Dohlen
- Institute for Nutritional and Food Sciences, Katzenburgweg 7-9, 53115 Bonn, Germany
| | - Johanna O Zeitz
- Institute of Animal Nutrition and Nutritional Physiology, Heinrich-Buff-Ring 26-32 (IFZ), 35392 Gießen, Germany
| | - Klaus Eder
- Institute of Animal Nutrition and Nutritional Physiology, Heinrich-Buff-Ring 26-32 (IFZ), 35392 Gießen, Germany
| | | | - Judith Kreyenschmidt
- Institute for Nutritional and Food Sciences, Katzenburgweg 7-9, 53115 Bonn, Germany
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