Table 2.

Physiological characterization of M. truncatula empty vector (EV) and MtVTC2 overexpression lines (oxVTC2) under well-watered conditions.

					ANA
Plant line	SDW (g)	RDW (g)	NDW (g)	SPAD	(μmol H2 min−1 g−1 NDW)
EV	1.29 ± 0.07	0.72 ± 0.08	0.034 ± 0.003	47.07 ± 0.44	4.85 ± 0.49
oxVTC2	1.46 ± 0.15	0.69 ± 0.08	0.039 ± 0.003	46.43 ± 1.18	5.15 ± 0.44

Plant biomass (SDW, shoot dry weight; RDW, root dry weight; NDW, nodule dry weight), relative chlorophyll content (estimated as SPAD units) and apparent nitrogenase activity (ANA). Values represent average ± SE (n = 8 biological replicates). Asterisks (*) denote significant differences (p ≤ 0.05, ANOVA test).