Table 1.

Gas-exchange measurements in NPK-fertilized tomato plants.

Treatment	An	gs	E	Ci
Control	6.47	146.9 c	1.61	285 ab
T34	7.06	110.3 b	1.30	260 a
Salt	2.14	25.5 a	0.31	249 a
T34+Salt	2.08	36.1 a	0.43	314 b
PT34 × Salt	ns	∗	ns	∗∗
PT34	ns	ns	ns	ns
PSalt	∗∗∗	∗∗∗	∗∗∗	ns

Rate of photosynthesis (A_n), stomatal conductance (g_s), transpiration (E) and intercellular CO₂ concentration (C_i) were recorded in plants derived or not from Trichoderma harzianum T34-treated seeds, and with or without salt stress (2 l of a 300 mM NaCl solution per 10 plants). NPK fertilizer was applied to 24-day-old plants, and salt was applied to 32-day-old plants. Measurements were taken 72 h after salt application. Each value is the mean of two measurements taken for six replicates (n = 6), and are expressed as μmol m^-2 s^-1, A_n; mmol m^-2 s^-1, g_s; mmol m^-2 s^-1, E; and μmol mol^-1, Ci. Significant effects were determined by a two-way ANOVA (^∗P < 0.05, ^∗∗P < 0.01, ^∗∗∗P < 0.001) for T34, salt and the T34 × salt interaction, ns, no statistical differences. Different letters denote statistical significance for the T34 × salt interaction.