. 2023 Jun 19;19:100756. doi: 10.1016/j.fochx.2023.100756

Table 1.

Effect of different levels of water deficit on the content of amino acid components (mg g⁻¹ DW) in tomato fruit.

Amino acid type	Treatments
	CK	T1	T2	T3	T4
Threonine	0.306 ± 0.007^ab	0.288 ± 0.005^bc	0.274 ± 0.008^c	0.315 ± 0.013^ab	0.319 ± 0.006^a
Phenylalanine	0.297 ± 0.003^a	0.273 ± 0.005^b	0.262 ± 0.005^b	0.303 ± 0.013^a	0.306 ± 0.003^a
Leucine	0.137 ± 0.003^b	0.144 ± 0.002^b	0.137 ± 0.002^b	0.189 ± 0.008^a	0.176 ± 0.004^a
Isoleucine	0.109 ± 0.001^c	0.113 ± 0.002^c	0.153 ± 0.001^b	0.147 ± 0.007^b	0.171 ± 0.003^a
Asparagine	0.107 ± 0.003^c	0.104 ± 0.005^c	0.153 ± 0.008^b	0.143 ± 0.012^b	0.181 ± 0.004^a
Tryptophan	0.214 ± 0.005^c	0.215 ± 0.006^c	0.247 ± 0.010^b	0.23 ± 0.004^bc	0.305 ± 0.010^a
Methionine	0.105 ± 0.001^b	0.123 ± 0.002^a	0.096 ± 0.006^b	0.129 ± 0.007^a	0.129 ± 0.008^a
Proline	0.109 ± 0.003^d	0.133 ± 0.004^c	0.275 ± 0.003^b	0.28 ± 0.004^b	0.299 ± 0.006^a
Valine	0.046 ± 0.001^c	0.060 ± 0.002^b	0.05 ± 0.001^c	0.067 ± 0.004^a	0.07 ± 0.002^a
Tyrosine	0.053 ± 0.003^bc	0.043 ± 0.003^c	0.061 ± 0.001^b	0.061 ± 0.001^b	0.074 ± 0.006^a
Cysteine	0.026 ± 0.007^a	0.033 ± 0.003^a	0.027 ± 0.002^a	0.032 ± 0.001^a	0.032 ± 0.003^a
Alanine	0.249 ± 0.004^c	0.343 ± 0.003^ab	0.328 ± 0.011^b	0.318 ± 0.009^b	0.367 ± 0.011^a
Glycine	0.028 ± 0.002^ab	0.035 ± 0.002^ab	0.023 ± 0.007^c	0.039 ± 0.004^a	0.038 ± 0.003^a
Serine	0.185 ± 0.006^d	0.240 ± 0.006^b	0.217 ± 0.005^c	0.267 ± 0.002^a	0.281 ± 0.005^a
Glutamate	33.309 ± 0.441^b	33.433 ± 0.449^b	23.71 ± 0.613^c	36.63 ± 0.54^a	34.494 ± 0.911^b
Aspartate	21.897 ± 0.314^d	29.006 ± 0.586^b	41.026 ± 1.36^a	24.395 ± 0.358^c	26.31 ± 0.748^c
Histidine	4.888 ± 0.533^c	5.762 ± 0.128^bc	7.159 ± 0.336^a	5.471 ± 0.128^bc	6.367 ± 0.226^ab
Cystine	0.013 ± 0.004^a	0.010 ± 0.001^a	0.012 ± 0.001^a	0.013 ± 0.003^a	0.015 ± 0.001^a
Arginine	0.529 ± 0.010^a	0.558 ± 0.010^a	0.517 ± 0.007^a	0.511 ± 0.049^a	0.406 ± 0.01^b
Glutamine	1.971 ± 0.036^c	2.289 ± 0.041^a	2.064 ± 0.067^abc	2.022 ± 0.088^bc	2.218 ± 0.101^ab
Total amino acids	64.579 ± 1.281^c	73.205 ± 1.185^ab	76.79 ± 2.382^a	71.562 ± 0.359^b	72.556 ± 1.56^ab

Note: The data are expressed as average values ± SE (n = 3). Different lowercase letters in the same row of the table indicate significant differences between treatments (p < 0.05).

Abbreviations: DW: dry weight; CK: the control with full irrigation of 90% the maximum field moisture capacity (FMC); T1: substrate maintained at 80% maximum FMC; T2: substrate maintained at 65% maximum FMC; T3: substrate maintained at 55% maximum FMC; T4: substrate maintained at 45% maximum FMC.