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Table 1 Free amino acid content in 10 or 50 μM melatonin- and serotonin-treated seedlings

From: Comparative physiological responses and transcriptome analysis reveal the roles of melatonin and serotonin in regulating growth and metabolism in Arabidopsis

Amino acid Abbr. Control (mg kg− 1 FW) M10 (mg kg− 1 FW) M50 (mg kg− 1 FW) S10 (mg kg− 1 FW) S50 (mg kg− 1 FW)
L-aspartic acid Asp 72.99 ± 14.7 51.2 ± 18.8* 45.69 ± 3.1* 56.5 ± 1.4* 50.1 ± 1.7*
L-threonine Thr 95.13 ± 7.4 107.3 ± 16.1 206.2 ± 84* 218.3 ± 86.3* 114.1 ± 13.5
L-serine Ser 30.92 ± 4.2 36 ± 5.3 42.8 ± 9.0 36.6 ± 4.8 43.7 ± 13.2
L-glutamic acid Glu 61.6 ± 11.3 63.5 ± 13.3 106.3 ± 13.4* 125.5 ± 24.1* 70.2 ± 14.8
Glycine Gly 98.3 ± 7.3 101.2 ± 4.8 104.8 ± 25.4 97.9 ± 14.6 105.8 ± 22.2
L-alanine Ala 19.34 ± 6.6 18.1 ± 2.3 20.8 ± 2.2 30.2 ± 4.2* 22.9 ± 4.9
L-cysteine Cys 38.6 ± 8.1 41.2 ± 3.4 26.9 ± 5.8* 18.7 ± 2.8* 27.8 ± 11*
L-valine Val 73.9 ± 8.8 67.6 ± 7.7 58.3 ± 12.8* 59.8 ± 16.9* 71.1 ± 3.1
L-methionine Met 24.7 ± 4.5 24.9 ± 3.2 25 ± 8.2 28.6 ± 1.9 33.6 ± 10.4
L-isoleucine Ile 55.8 ± 7.0 45.1 ± 3.2* 47.8 ± 8.3 40.9 ± 6.8* 56.4 ± 9.7
L-leucine Leu 116.9 ± 5.4 58.9 ± 1.5* 68.1 ± 17.6* 68.2 ± 12.8* 87.3 ± 6.4*
L-tyrosine Tyr 56 ± 15.1 59.7 ± 4.9 56.8 ± 3.8 62.6 ± 21.4 91.3 ± 17*
L-phenylalanine Phe 54.9 ± 8.8 46.5 ± 6.7 42.9 ± 7.4 44.9 ± 17.5 65.2 ± 9.2*
L-histidine His 56.2 ± 14.3 46.1 ± 6.3 24.2 ± 6.0* 45.4 ± 20.3 82.7 ± 18*
L-lysine Lys 70.7 ± 1.5 153.3 ± 51.9* 150.7 ± 46.9* 163.5 ± 2.3* 90.7 ± 9.8*
L-arginine Arg 31.2 ± 2.1 24 ± 1.2* 25.9 ± 1.6* 35.8 ± 2.9 27 ± 2.2*
L-proline Pro 11.4 ± 1.7 23.4 ± 1.3* 37.5 ± 1.6* 33.6 ± 7* 42 ± 1.6*
Total amino acid   968.7 ± 31.3 968.1 ± 23.3 1090.8 ± 45* 1167.1 ± 35.2* 1082.6 ± 86.3*
  1. Error bars represent the SE. Asterisks indicate significant differences from the control (Student’s t test, P < 0.05). M10, 10 μM melatonin; M50, 50 μM melatonin; S10, 10 μM serotonin; S50, 50 μM serotonin