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The increasing production potential of birds is correlated with a lower health and immune potential, resulting  in the appearance of numerous meat quality defects. The greatest concern for gallinaceous poultry (chickens  and turkeys) is PSE meat, which is characterized by light colour, soft texture and a reduced water-binding  capacity. The aim of the study was to compare plasma corticosterone concentration, muscle fibre diameter,  and the apoptotic markers between normal and pale, soft, exudative (PSE) turkey breast muscles. The results  show, that the PSE group is characterized by a significantly higher plasma corticosterone concentration and  a significantly greater muscle fibre diameter at 30 min post mortem compared to the normal group. The time  of refrigerated storage (4°C) of meat contributes significantly to reducing muscle fibre diameter in the PSE  group at 24 h post mortem compared to 30 min post mortem. Additionally, the results obtain showed that the  caspase-3 activity at 30 min post mortem increased significantly in the turkey breast muscles of PSE compared  with the normal group. Moreover, the PSE group demonstrated the higher apoptotic potential measured in  the breast muscle of turkey compared with the normal group. It is stated from the obtained results that the  incidence of PSE meat in turkeys may be associated with their higher susceptibility to stress factors and stressinduced  pathological states.

medycyna weterynaryjna

Comparison of plasma corticosterone concentration, muscle fibre diameter, and apoptotic markers between normal and pale, soft, exudative (PSE) turkey breast muscles