Phaeodactylum tricornutum photorespiration takes part in glycerol metabolism and is important for nitrogen-limited response

Huang, Aiyou; Liu, Lixia; Yang, Chen; Wang, Guangce

doi:10.1186/s13068-015-0256-5

Biotechnology for Biofuels and Bioproducts

Table 4 Ratios of abundances of key cellular metabolites under different culture conditions determined by NMR

From: Phaeodactylum tricornutum photorespiration takes part in glycerol metabolism and is important for nitrogen-limited response

Group	Metabolite	N-AC+ / N-AC-	N-AC+ / N + AC+	N + AC+ / N + AC-	N-AC- / N + AC-
Alcohols	Ethanol	1.049*	1.067*	1.063	1.081
Alcohols	Ethylene glycol	0.878	2.005*	1.293*	2.952**
Amines	Dimethylamine	1.153*	1.032	1.252*	1.120*
	Methylamine	1.143*	1.048	0.730**	0.670**
	Trimethylamine	0.804*	0.573**	1.140	0.812*
Amino acids	Alanine	1.176**	0.045**	0.965	0.037**
	Asparagine	-	0.000**	0.569**	0.000**
	Aspartate	-	0.000**	1.236**	0.000**
	Betaine	0.485**	0.385**	0.768**	0.608**
	Carnitine	1.079*	0.931	0.997	0.860*
	Glutamate	1.147*	0.257**	1.069	0.240**
	Glutamine	-	0.000**	1.220**	0.000**
	Glycine	0.657	1.241*	0.956	1.805*
	Isoleucine	0.964	0.168**	1.108	0.193**
	Leucine	0.876**	0.278**	0.880	0.279**
	Methionine	1.278*	0.067**	1.067	0.056**
	N-Isovaleroylglycine	1.333**	2.952**	1.448*	3.207**
	O-Acetylcarnitine	0.871**	0.853	1.107	1.083*
	Ornithine	-	0.000**	0.993	0.000**
	Phenylalanine	0.882*	0.462**	1.073	0.561**
	Proline	-	0.000**	1.177	0.000**
	Threonine	-	0.000**	1.516**	0.000**
	Tyrosine	0.959	0.678**	1.040	0.735**
	Valine	1.283**	0.154**	1.001	0.120**
Amino acid derivatives	Creatine	1.296**	1.658**	1.192**	1.526**
Amino acid derivatives	Guanidoacetate	1.198*	0.330**	0.833	0.229**
Ammoniums Compounds	Choline	0.849*	0.028**	2.379**	0.080**
	O-Phosphocholine	0.790**	1.985**	0.712**	1.789**
	sn-Glycero-3-phosphocholine	0.945	1.180	0.975	1.218
Ketones	Acetone	0.578**	1.381**	0.647	1.547*
Methanol	Methanol	0.944	1.052	1.023	1.142*
Nucleic acid components	ATP	0.000**	0.000**	0.797	0.335**
Nucleic acid components	NAD+	1.002	-**	0.000	0.960
Organic acids	2-Oxoglutarate	0.874	22.509**	0.849	21.861**
	Acetate	1.077*	1.355*	1.079	1.357**
	Ascorbate	0.587**	0.327**	1.465*	0.817
	Formate	0.654**	1.099*	0.901	1.515**
	Fumarate	0.778**	0.462**	1.161	0.690*
	Isocitrate	-	-	0.000**	0.000**
	Lactate	0.586**	6.185**	2.303**	24.313**
	Pyruvate	0.938	0.455**	1.414	0.685**
	Succinate	0.694**	0.514**	0.991	0.734**
Sugars	Glucose	1.203	1.303*	1.341**	1.453**
	Glucose-1-phosphate	0.916	-**	-	-**
	Glucose-6-phosphate	1.210*	2.031**	1.200**	2.014**
	Glycerol	0.823**	0.595**	1.022	0.739**
Others	Trigonelline	1.098*	0.859**	1.122	0.878

**Student t test P value <0.01, *Student t test P value <0.05, ⁻Divide by zero.

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