Table 4.

Correlation (r) of least-square means of non-destructive phenotyping traits measured under control conditions (n = 22).

Plant traits	Projected green area before treatment (cm2.plant-1)	Projected green area after treatment (cm2.plant-1)	Normalized difference vegetation index
Initial vigor (1–5)	0.59∗∗	0.52∗∗	0.34 ns
Plant height before treatment (cm)	0.55∗∗	0.51∗	0.70∗∗∗
Plant height after treatment (cm)	0.50∗∗	0.51∗	0.76∗∗∗
Shoot biomass (g.plant-1)	0.94∗∗∗	0.84∗∗∗	0.44∗
Projected green area before treatment (cm2.plant-1)	-	0.90∗∗∗	0.40 ns
Projected green area after treatment (cm2.plant-1)	0.90∗∗	-	0.41∗
Normalized difference vegetation index	0.40 ns	0.41∗	-

Pearson’s correlation coefficients are indicated with their statistical significance as follows: ns, non-significant (P > 0.05); ^∗P ≤ 0.05; ^∗∗P ≤ 0.01; ^∗∗∗P ≤ 0.001.