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Table 2 Effects of N supply on mean (±SE, n = 3) concentrations (μg g−1 DW) of FAADs as well as their summation in Citrus sinensis roots

From: Adaptive responses of carbon and nitrogen metabolisms to nitrogen-deficiency in Citrus sinensis seedlings

FAADs Molecular formula N treatments (mM)
0 5 10 15 20
NAT C11H13NO4 0.165±0.001b 0.340±0.022a 0.323±0.017a 0.408±0.035a 0.403±0.051a
H-Tyr-OMe C10H14NO3 0.199±0.016a 0.080±0.005c 0.122±0.026bc 0.148±0.025ab 0.147±0.017ab
KYNA C10H7NO3 0.233±0.010a 0.291±0.030a 0.269±0.016a 0.273±0.024a 0.231±0.015a
Phe C9H11NO2 2.154±0.065b 2.291±0.189b 3.145±0.323a 3.633±0.318a 3.782±0.268a
Tyr C9H11NO3 31.199±1.428b 73.209±4.578a 83.615±3.571a 78.660±6.685a 70.230±6.440a
α-AP C13H16N2O5 1.566±0.040b 2.192±0.084a 2.443±0.094a 2.540±0.155a 2.221±0.192a
Leu C6H13NO2 5.354±0.425b 6.832±0.324a 7.747±0.531a 7.650±0.540a 6.968±0.405a
Ile C6H13NO2 8.767±0.782c 17.868±0.948ab 17.952±1.152a 16.048±1.230ab 14.522±1.160b
L-Pipecolic acid C6H11NO2 29.837±5.389c 95.538±12.080b 154.734±9.567a 189.444±8.235a 206.392±34.005a
NAA C6H9NO5 0.284±0.048c 1.352±0.090bc 1.762±0.420ab 2.675±0.327a 2.347±0.651ab
α-Aminoadipic acid C6H11NO4 73.208±4.056a 25.016±3.301b 18.591±1.362bc 14.702±0.925c 14.432±1.486c
4-Acetamidobutyric acid C6H11NO3 0.688±0.044a 0.701±0.009a 0.653±0.046a 0.645±0.038a 0.597±0.048a
ACA C6H13NO2 1.236±0.018c 1.923±0.033a 1.626±0.060b 1.600±0.068b 1.501±0.056b
Trp C11H12N2O2 71.085±5.983a 71.149±3.780a 66.691±3.888a 71.457±3.302a 67.582±5.361a
Glycylphenylalanine C11H14N2O3 0.409±0.024c 0.531±0.009a 0.547±0.008a 0.547±0.018a 0.463±0.014b
N'-Formylkynurenine C11H12N2O4 4.974±0.554c 7.231±0.074b 8.085±0.116ab 9.054±0.503a 9.036±0.643a
Val C5H11NO2 18.698±1.565c 27.613±1.391a 24.994±0.985ab 23.315±1.307b 22.661±1.051bc
Met C5H11NO2S 3.743±0.085c 7.003±0.195a 7.059±0.337a 5.983±0.452b 6.210±0.184ab
Pro C5H9NO2 374.028±22.621c 1492.480±27.103b 1928.221±122.469a 2048.379±127.600a 1980.211±6.484a
Glu C5H9NO4 4882.527±168.286b 6279.027±253.890a 6550.942±263.117a 6795.105±94.542a 6721.240±73.946a
5-HTP C10H12N2O 36.506±1.836a 26.402±2.582c 27.071±0.638bc 31.948±2.034abc 33.912±3.297ab
Trans-4-Hydroxy-L-proline C5H9NO3 3.819±0.585c 37.349±0.798b 49.452±3.473a 51.573±4.419a 48.613±5.078a
MetSO C5H11NO3S 2.174±0.054c 4.281±0.304a 4.090±0.078a 3.867±0.198ab 3.474±0.174b
5-Aminovaleric acid NH2(CH2)4CO2H 1.944±0.079c 2.197±0.018bc 2.483±0.106ab 2.651±0.142a 2.596±0.249ab
Asp C4H7NO4 421.848±45.155c 825.214±30.502a 716.624±44.105b 876.584±14.487a 897.974±23.794a
Thr C4H9NO3 59.546±1.176c 117.639±8.039b 142.318±7.715a 139.047±8.561ab 132.957±9.415ab
Homoserine C4H9NO3 1.742±0.043b 6.916±1.022a 7.793±1.188a 8.486±0.119a 6.889±2.227a
N6-Acetyl-L-lysine C8H16N2O3 1.641±0.038b 3.397±0.230a 3.171±0.365a 3.038±0.316a 2.777±0.434a
(5-L-Glutamyl)-L-amino acid C8H14N2O5S 7.225±0.319c 24.528±1.782ab 29.969±2.840a 25.353±1.698ab 22.180±2.472b
N-Glycyl-L-leucine C8H16N2O3 1.056±0.082c 1.389±0.105b 1.697±0.032a 1.770±0.113a 1.339±0.065b
γ-Glutamate-cysteine C8H14N2O5S ND 72.421±6.540a 65.085±9.579a 46.665±19.215a 62.097±13.921a
2-Aminobutyric acid C4H9NO 0.605±0.035b 1.107±0.133a 1.014±0.124a 1.042±0.168a 0.937±0.133ab
(S)-β-Aminoisobutyric acid C4H9NO 1.799±0.134b 3.215±0.202a 3.536±0.477a 3.578±0.426a 3.343±0.496a
GABA C4H9NO 885.850±23.997b 3313.895±27.368a 3594.377±395.769a 3791.500±258.905a 3257.049±294.992a
DMG C4H9NO2 0.152±0.076b 0.430±0.036a 0.426±0.069a 0.431±0.035a 0.382±0.036a
LCYH C7H14N2O4S 19.039±2.350a 5.215±0.392b 7.133±0.294b 8.231±1.228b 8.069±0.584b
GLY-PRO C7H12N2O3 0.745±0.005d 1.280±0.050c 1.762±0.114ab 1.973±0.110a 1.596±0.070b
NAG C7H12N2O4 1.657±0.104b 2.077±0.186b 4.511±0.529a 4.525±0.808a 5.491±0.589a
GSSG C20H32N6O12S2 8291.753±901.041c 28363.315±2223.965b 39540.366±2348.517a 44467.728±7029.281a 41518.728±1469.166a
Ala C3H7NO2 169.976±7.362c 414.387±32.296b 589.784±32.025a 508.838±40.846ab 437.666±59.094b
Ser C3H7NO3 92.352±1.495c 306.843±13.234b 382.944±32.603a 375.183±20.996ab 365.122±27.631ab
Lys C6H14N2O2 54.745±3.990d 272.506±14.334c 443.637±45.060b 439.929±47.889ab 447.527±26.121a
β-Ala C3H7NO2 44.684±3.817b 321.239±13.730a 429.385±53.519a 419.892±45.015a 383.111±59.216a
TMAO C3H13NO3 0.00919±0.00018a 0.00590±0.00038b 0.00276±0.00017c 0.00273±0.00006c 0.00256±0.00002c
N8AS C9H21N3O 2.745±0.162b 4.203±0.250a 4.331±0.010a 4.671±0.203a 4.472±0.176a
D-Ala-D-Ala C6H12N2O3 11.662±0.236c 26.255±0.886a 22.260±2.114a 17.498±1.604b 13.289±0.954c
Cys C3H7NO2S ND 2.185±1.148a 3.799±0.230a ND ND
Hyl C6H14N2O3 ND 3.752±0.021b 4.376±0.088a 4.708±0.216a 4.688±0.222a
Gln C5H10N2O3 1660.744±97.980c 2470.030±94.279c 3775.858±77.545b 4729.450±445.431a 5471.375±327.451a
Orn C5H12N2O2 20.165±1.102d 62.994±4.976c 162.107±19.792b 177.968±30.235ab 210.096±16.232a
ASA C10H20N4O6 38.332±0.776a 9.740±0.267c 13.256±1.147b 14.199±0.706b 13.821±0.493b
HC C7H15N3O3 0.734±0.011c 0.822±0.015b 0.926±0.044a 0.869±0.012ab 0.880±0.030ab
3-N-Methyl-L-His C7H11N3O2 4.067±0.184a 3.805±0.259a 3.697±0.237a 3.717±0.130a 3.641±0.196a
S-(5-Adenosy)-L-homocysteine C14H20N6O5S 6.063±0.054b 16.725±0.436a 15.887±0.955a 15.472±0.872a 15.785±1.463a
L-Carnosine C9H14N4O3 2.018±0.028c 2.787±0.170b 3.324±0.101a 3.245±0.104a 2.798±0.041b
Asn C4H8N2O3 793.707±45.995d 3076.171±270.464c 5167.251±144.278b 5887.175±388.061ab 6316.118±145.607a
Cit C6H13N3O3 18.431±2.632d 107.488±3.100c 210.235±17.070b 234.994±31.482ab 275.774±6.540a
Gly C2H5NO2 13.987±1.395c 59.992±1.186b 84.196±8.524a 88.209±5.087a 88.209±5.087a
Nα-Acetyl-L-arginine C8H16N4O3 5.953±0.588a 5.235±0.228a 5.813±0.325a 5.364±0.261a 4.900±0.776a
2-Aminoethanesulfonic acid C2H7NO3S 1.804±0.031b 1.804±0.031b 3.559±0.434a 3.647±0.361a 3.616±0.240a
EtA C2H7NO 34.798±2.553c 85.061±5.648a 81.762±2.640a 69.332±12.292ab 61.569±2.705b
Homo-Arg C7H16N4O2 9.273±0.102d 11.952±0.515c 15.939±1.399b 16.224±0.356ab 17.929±1.918a
3,7-Dimethyluric acid C7H8N4O3 ND ND ND ND ND
Arg C6H14N4O2 291.375±14.853c 474.445±8.089b 906.772±30.635a 967.224±88.045a 1054.664±63.417a
CP C4H8N3Na2O5P 73.734±5.552b 146.347±31.718a 123.320±18.966ab 164.386±10.906a 155.567±8.084a
Creatine C4H9N3O2 0.104±0.104a 0.163±0.163a 0.154±0.154a 0.370±0.013a 0.375±0.020a
Succinic acid C4H6O4 691.983±50.826c 1770.347±76.789a 1542.250±34.615ab 1570.586±90.656ab 1394.339±134.070b
TFAADs   19292.898±1188.472c 50582.832±3001.737b 67070.472±3239.715a 74465.409±7887.679a 71882.835±1558.005a