Table 3.

Gas-exchange measurements in non-NPK-fertilized tomato plants.

Treatment	An	gs	E	Ci
Control	3.78	44.8 ab	0.66	265
T34	5.45	48.6 b	0.73	251
Salt	4.60	35.7 a	0.45	228
T34+Salt	5.27	64.2 c	0.76	207
PT34 × Salt	ns	∗∗	ns	ns
PT34	ns	∗∗∗	ns	∗
PSalt	ns	ns	ns	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 T. harzianum T34-treated seeds, and with or without salt stress (2 l of a 300 mM NaCl solution per 10 plants). Salt was applied to 32-day-old plants. Measurements were taken 72 h after salt application. Each value is the mean of six replicates (n = 6), and are expressed in 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.