Flurtamone

Flurtamone is a herbicide that interferes with carotenoid biosynthesis by inhibiting phytoene desaturase, blocking the conversion of phytoene to ζ-carotene. Flurtamone can cause the accumulation of phytoene, leading to photooxidative destruction of chlorophyll and plant albinism. Flurtamone comprises a pair of chiral enantiomers, R-flurtamone and S-flurtamone, with R-flurtamone exhibiting significantly stronger herbicidal activity against target weeds. Flurtamone is toxic to Selenastrum capricornutum. Flurtamone can control broadleaf weeds and grass weeds as well as various weeds, and can be used in herbicide-related research^[1][2][3]. In Vitro:Flurtamone inhibits phytoene desaturase activity, blocking downstream carotenoid biosynthesis and causing phytoene accumulation^[1].

Flurtamone exhibits enantioselective biological effects: in germination experiments with multiple weed species, the herbicidal activity of R‑flurtamone was 6.3‑35.6 times that of S‑flurtamone, contributing 86.3‑97.3% of the total activity of the racemate; in acute toxicity experiments with Raphidocelis subcapitata, R‑flurtamone was more toxic^[2].

Fluridone can induce the formation of distinct tissue zones in maize leaves. The green / pale green tissues undergo oxidative stress-induced necrosis; the albino tissues show mild oxidative damage, but the antioxidant enzymes SOD, POD, CAT, and GR are activated. The death of albino leaves is caused by carbohydrate starvation rather than membrane lipid peroxidation^[3].