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Published 2021

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Publication details

Journal : Foods , vol. 10 , 2021

Publisher : MDPI

International Standard Numbers :
Printed : 2304-8158
Electronic : 2304-8158

Publication type : Academic article

Contributors : Sanden, Karen Wahlstrøm; Böcker, Ulrike; Ofstad, Ragni; Pedersen, Mona Elisabeth; Høst, Vibeke; Afseth, Nils Kristian; Rønning, Sissel; Pleshko, Nancy

Issue : 3

Summary

Recently, two chicken breast fillet abnormalities, termed Wooden Breast (WB) and Spaghetti Meat (SM), have become a challenge for the chicken meat industry. The two abnormalities share some overlapping morphological features, including myofiber necrosis, intramuscular fat deposition, and collagen fibrosis, but display very different textural properties. WB has a hard, rigid surface, while the SM has a soft and stringy surface. Connective tissue is affected in both WB and SM, and accordingly, this study’s objective was to investigate the major component of connective tissue, collagen. The collagen structure was compared with normal (NO) fillets using histological methods and Fourier transform infrared (FTIR) microspectroscopy and imaging. The histology analysis demonstrated an increase in the amount of connective tissue in the chicken abnormalities, particularly in the perimysium. The WB displayed a mixture of thin and thick collagen fibers, whereas the collagen fibers in SM were thinner, fewer, and shorter. For both, the collagen fibers were oriented in multiple directions. The FTIR data showed that WB contained more β-sheets than the NO and the SM fillets, whereas SM fillets expressed the lowest mature collagen fibers. This insight into the molecular changes can help to explain the underlying causes of the abnormalities.

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