Table 1.
Number and surface (in µm2) of the chloroplasts from spongy parenchyma of P. caerulea plants treated with plant biostimulants.
| Variant | Chloroplast Number (n = 100) | Chloroplast Surface, µm2 (n = 40) |
|---|---|---|
| C—control (no treatment with plant biostimulants, treated only with water) | 7.9 ± 0.4b | 4.8 ± 0.8b |
| T1—foliar treatment with Trichoderma consortium suspension, 106 cfu/mL, equiv. to 1011 spores/ha | 8.4 ± 0.3b | 5.3 ± 0.6b |
| T2—foliar treatment with Trichoderma consortium suspension, 108 cfu/mL, equiv. to 1013 spores/ha | 12.8 ± 0.7a | 9.2 ± 1.1a |
| 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 | 8.9 ± 0.6b | 6.2 ± 0.9b |
Values presented are means ± standard error. Values followed by the same letter are statistically similar for a specific parameter, according to LSD (p < 0.05); n represents the number of cells investigated.