BMC Plant Biology

Table 1 Analysis of free amino acid levels (nmol g ^-1 FW) in transgenic plant line (3-1) in comparison with the wild type (WT)

From: Overexpression of MfPIP2-7 from Medicago falcata promotes cold tolerance and growth under NO₃ ⁻ deficiency in transgenic tobacco plants

	Leaves		Roots
	WT	3-1	WT	3-1
Glycine	2256	1664**	28.2	44.3**
Glutamine	2143	1986	131	258**
Glutamic acid	1801	1848	171	172
Serine	1260	860**	79.2	107**
Aspartic acid	1094	946*	79.9	86.2
Asparagine	924	1844**	70.1	140**
Threonine	754	1173**	53	101**
Proline	682	1174**	208	211
Alanine	622	489*	56.9	76.5*
Phenylalanine	368	352	29.8	34.8
Arginine	313	595**	20.6	26.1
Leucine	239	332**	74.5	102*
Phospho-serine	221	241	78.7	92.5**
Histidine	177	308**	26.1	38.3**
Tyrosine	176	294**	13.1	22.3**
γ-Amino butyric acid	143	197**	130	163
Tryptophan	142	227**	19.5	42.3**
Lysine	130	297**	34.6	49.4**
Isoleucine	114	141	10.7	22.6**
1-Methyl-histidine	58.3	80.5**	117	88.4*
Citrulline	52.8	32.9**	5.85	7.55
α-Aminoadipic acid	24.5	43.9**	ND	ND
Ornithine	18.4	27**	26.8	33.2**
Ethanolamine	ND	ND	131	110
Carnosine	ND	ND	173	232**
Total	13,714	15,152	1768	2279**

Means of three independent samples and standard errors are presented; an asterisk * or ** indicates significant difference between WT and transgenic plant at P < 0.05 or P < 0.01, respectively

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ISSN: 1471-2229

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