Atrazine is a systemic selective pre-emergence and post-emergence herbicide. Mainly absorbed by roots, little absorption by stems and leaves, quickly transmitted to plant meristems and leaves, interferes with photosynthesis, and kills weeds. In the resistant crops such as corn, it is decomposed by corn ketone enzyme to produce non-toxic substances, so it is safe for crops. Atrazine has high water solubility, is more mobile in the soil than simazine, and can be easily washed to a deeper layer by rain, which can inhibit some deep-rooted weeds and can be decomposed by microorganisms in the soil. Factors such as medication dosage and soil texture can affect up to half a year. It is suitable for controlling annual and biennial broad-leaved weeds and monocotyledonous weeds in corn, sorghum, woodland, grassland, sugar cane, etc.
Atrazine has effects on female Drosophila behavior and dopamine neurotransmission. The former researcher exposed the newly fertilized eggs of Drosophila melanogaster to the diet of atrazine in an open field system until the emergence of adult worms, and the activity and activity of tyrosine hydroxylase (TH) on newly emerged male and female Drosophila melanogaster. The gene expression of the dopamine system was studied, and it was found that all analysis parameters of male fruit flies in the environment exposed to atrazine had no significant effect. However, in the field test of female fruit flies, the resting time increased and the exploratory activity decreased. It was concluded that the effect of atrazine on female fruit flies is due to the interference of the dopamine system.
Impact on other organisms:
1 Atrazine has an impact on aquatic life
(1) Atrazine has an effect on the phospholipid fatty acid characteristics of aquatic vertebrates. Although Atrazine was banned by Portugal in 2007, its presence can still be detected in surface and groundwater. Because young lampreys need to migrate to a fresh marine environment to begin the parasitic stage of their life cycle, they are particularly vulnerable to other triazine-based organic pollutants such as atrazine. The researchers found in the study that exposed lamprey to atrazine at a concentration of 100 μg/L and observed that gill cell phospholipid fatty acid characteristics are sensitive to atrazine exposure. The advantage is that the cells of the gill chloride cells are observed Changes and fatty acid profiles of the basolateral membrane can serve as early warning signals of the presence of atrazine in the environment.
(2) The presence of atrazine disrupts the olfactory-mediated behavior of aquatic animals, and the lack of chemical sensation mediated by it may disrupt mating and affect population size. A former researcher exposed male rust crawfish to Atrazine water for 96 hours. Compared with the normal male rust crawfish control group, it took more time to test the odor source of female rust crayfish than the normal control group. come out.
2 Atrazine has an impact on humans
(1) Atrazine can induce various cancers such as prostate cancer, breast cancer, testicular cancer and ovarian cancer. An independent study by the University of Indiana found that in areas with high levels of atrazine residues in water, it was found that the incidence of certain malformations of newborns in this area is higher. A study in 2011 found that atrazine exposure was related to neonatal abdominal fissure deformity, and part of the intestines of neonates with abdominal fissure leaked through the abdominal wall.
(2) Medical research in the United States in 2007 confirmed that Parkinson’s disease may be related to pesticide exposure, and that Atrazine causes Parkinson’s disease dopamine toxicity. Atrazine herbicides have been shown to modulate catecholamine metabolism in PC12 cells, and in vivo experiments have affected basal ganglia function by interfering with dopamine’s vesicle storage or cellular uptake.
Post time: Jun-29-2020