Figure 4.
Total polyphenols (mg GAE/g dw) and total flavonoids (mg QE/g dw) in the hydroalcoholic extracts from aerial parts of the P. caerulea plants after seven days from the first treatment and after 60 days from the first treatment with plant biostimulants. C—control (no treatment with plant biostimulants, treatment only with water); T1—foliar treatment with Trichoderma consortium suspension, 106 cfu/mL, equiv. to 1011 spores/ha; T2—foliar treatment with Trichoderma consortium suspension, 108 cfu/mL, equiv. to 1013 spores/ha; T3—foliar treatment with a reference product, consisting of plant extracts, essential oils, and fatty acids in an oil/water emulsion, and extract of the seaweed Ascophyllum nodosum, equiv. to 3 L/ha. Values presented are means ± standard error (n = 12 replicates). Columns labeled with different letters within each parameter are significantly different at p < 0.05.