Table 2.

Ratios of stress responsive root metabolites (stressed/control).

	SN-fed vs.CN-fed	SN-fix vs.CN-fix	DN-fed vs. CN-fed	DN-fix vs.CN-fix
GABA	3.1 (0.019)	0.5 (0.046)	ns	2.0 (0.043)
Aspartate	3.7 (0.011)	3.3 (0.048)	2.5 (0.049)	2.8 (0.008)
Leucine	2.0 (0.007)	ns	2.5 (0.005)	ns
Threonate	3.0 (0.046)	2.9 (0.048)	ns	2.8 (0.001)
Glutamate	4.9 (0.024)	ns	2.0 (0.001)	ns
Proline	ns	ns	10.5 (0.001)	12.1 (0.005)
Fumarate	3.5 (0.025)	2.3 (0.004)	3.1 (0.001)	3.3 (0.009)
Galactonate	3.8 (0.001)	2.8 (0.013)	ns	2.0 (0.003)
Sucrose	2.7 (0.003)	4.4 (0.006)	2.8 (0.001)	2.1 (0.003)
Myo-Inositol	4.0 (0.003)	ns	2.3 (0.002)	2.0 (0.001)
Ononitol	3.0 (0.035)	2.0 (0.003)	ns	2.0 (0.003)
Pinitol	2.6 (0.048)	ns	3.0 (0.018)	ns

Fold change ≥ 2 and student’s t test p < 0.05 in brackets (n = 6). CN-fed, mean of controls of N-fertilized plant roots; SN-fed, mean of salt stressed, N-fertilized plant roots; CN-fix, mean of controls of N-fixing plant roots; DN-fix, mean of salt stressed, N-fixing plant roots; ns, not significantly changed.