Table 3. Effects of short-term exposure to heat stress or thermal-neutral conditions on plasma concentrations (µg/mL) of indispensable and dispensable amino acids in growing pigs

Amino acid1) Treatment2) SEM p-value
TN(-1D) HS TN(2D) TN(5D)
Indispensable
 Thr 10.80b 25.33a 21.13a 20.84a 1.43 0.011
 Val 1.78b 3.75a 1.93b 3.38ab 0.28 0.044
 Met 5.77b 7.32a 7.65a 7.80a 0.22 0.016
 Ile 3.13 3.08 3.47 3.50 0.26 0.913
 Leu 16.10 19.85 21.10 21.70 0.85 0.123
 Phe 20.38 23.55 25.60 26.60 1.56 0.527
 Lys 40.97 42.68 62.72 57.30 3.76 0.133
 His 13.23 15.05 17.33 17.48 0.84 0.257
 Arg 31.30 32.37 39.10 38.40 2.35 0.539
Dispensable
 Asp 0.22 0.28 0.27 0.46 0.10 0.847
 Ser 15.92 20.20 20.25 18.22 1.00 0.373
 Glu 11.97 13.32 6.50 4.58 2.26 0.482
 Gly 22.60 28.63 33.48 30.28 1.50 0.097
 Ala 80.73 87.27 94.70 86.66 3.67 0.600
 Cys 63.78b 82.12ab 90.78a 83.30ab 3.27 0.046
 Tyr 32.68b 42.23ab 49.50a 45.12a 1.99 0.041
 Pro 14.65 15.77 20.77 21.00 1.71 0.441
Thr, threonine; Val, valine; Met, methionine; Ile, isoleucine; Leu, leucine; Phe, phenylalanine; Lys, lysine; His, histidine; Arg, arginine; Asp, aspartic acid; Ser, serine; Glu, glutamic acid; Gly, glycine; Ala, alanine; Cys, cysteine; Tyr, tyrosine; Pro, proline.
TN(-1D), thermal-neutral condition; HS, heat stress condition; TN(2D), 2 d of thermal-neutral recovery; TN(5D), 5 d of thermal-neutral recovery.
Mean values with Duncan analysis (p < 0.05).