Table 1.
Chlorophyll fluorescence parameters measured with the Maxi Imaging PAM fluorometer.
Fig 1.
Dose-response curves for E. globulus aqueous extract on (A) germination and (B) radicle length of L. sativa.
Mean values labeled with distinct letters are significantly different at P ≤ 0.05 (LSD post hoc multiple comparisons). Symbols represent mean values of four replicates ± SD. Met., metolachlor (label dose); % r.c., percentage with respect to the control.
Table 2.
E. globulus leaf aqueous extract ED values for germination and radicle length of L. sativa.
Fig 2.
Effects of E. globulus aqueous extract at different concentrations and metolachlor (label dose) on the growth of A. stolonifera ranking from 0 to 5: 0, no effect; 5, total inhibition. Count cases, n = 7.
Asterisks indicate significant differences between control and each treatment (*P ≤ 0.05, **P ≤ 0.01, ***P ≤ 0.001, n.s. not significant P > 0.05; Mann-Whitney U test).
Fig 3.
Significative differences of photosynthetic parameters on L. sativa adult plants treated with E. globulus aqueous extract by spraying vs. watering.
Positive (+) and negative (-) signs indicate increase or decrease with respect to the control. The number of signs indicates the level of statistical significance: one, P ≤ 0.05; two, P ≤ 0.01; three, P ≤ 0.001; independent samples t-test.
Fig 4.
Phytotoxic effects of eucalyptus aqueous extracts on growth and physiological parameters of lettuce seedlings.
Bars represent mean values of three replicates ± SD. For each mode of application, mean values labeled with distinct letters are significantly different (P ≤ 0.05; independent samples t-test). For each treatment, asterisks indicate significant differences between watering and spraying (*P ≤ 0.05;**P ≤ 0.01;***P ≤ 0.001; independent samples t-test).
Table 3.
Chemical profile of Eucalyptus globulus aqueous extract.