Effects of a new fluorinated fungicide on the seed germinations of corn (Zea mays) and chicory (Cichorium intybus).

HERRERA CANO, NATIVIDAD; SANTIAGO, N.; PODIO, NATALIA S.; WUNDERLIN, DANIEL A.

Curso virtual

Congreso; RAFV CONFERENCE 2021 ? XXXIII Argentinian meeting of Plant Physiology; 2021

The goal of this work was to compare the effect of cyproconazole (CYP) and a new fluorinated derivative (CF) on the germination stage of corn and chicory. Three treatments were used: Control (0.1% methanol), 3.4 mM CYP, and 3.4 mM CF. Five corn or 20 chicory seeds were added to the Petri dish with 4 layers of paper and incubated, after adding treatment solutions, in the dark for 6 days. Five Petri dishes were used for each treatment. The experiment was repeated 3 times. After 6 days, germinated seeds were harvested, dissected into the root, shoot, and cotyledon. Germination rate and lengths were recorded for each harvested seed. After that, cotyledons, shoots, and roots from each Petri dish were pooled and dried at 90 ᵒC for 48 h to measure dry biomass, moisture, and specific lengths. CF showed a less phytotoxic effect on corn and chicory germinations than CYP. A negative effect of CF was found in the specific lengths of root and cotyledon in corn, and in the length and the specific length of root in chicory with respect to controls. On the other hand, CYP showed significant disparities in root length, specific root length and shoot moisture in both species, and negative effects on cotyledon in corn. Length, biomass and the specific length of shoot were also affected in chicory. These results indicate that CF is less phytotoxic than its precursor CYP and the differences observed between them could be related to the log Kow values.