Fig. 5From: Polyphosphate application influences morpho-physiological root traits involved in P acquisition and durum wheat growth performanceEffects of PolyPs and OrthoP application at three P doses on chlorophyll a fluorescence transient curves a and on differential chlorophyll fluorescence curves ΔVt b of wheat. Each value represents the mean of eight independent repetitions. The differential curves (ΔVt) were constructed by subtracting the normalized fluorescence values recorded in fertilized plants from those recorded in the unfertilized ones (P0)Back to article page