Publications by authors named "Nadezda Chukina"
Article Synopsis
- A study on aquatic macrophytes was conducted to assess their ability to accumulate heavy metals and synthesize thiols, with specific plants collected from 11 sites.
- High concentrations of metals like Cu, Ni, Mn, Zn, and Fe were found at sites, indicating environmental pollution.
- Certain species, particularly B. trichophyllum, C. demersum, and L. gibba, showed potential for effectively removing metals from contaminated water, while others like E. canadensis were better suited for areas with moderate pollution.
Urea being a fertilizer is expected to be less toxic to plants. However, it was found that urea at 100 mg L(-1) caused the oxidative stress in Elodea leaves due to the formation of reactive oxygen species (ROS) and lipid peroxidation that are known to stimulate antioxidant pathway. Urea at a concentration of 500 and 1000 mg L(-1) decreased low-molecular-weight antioxidants.
View Article and Find Full Text PDFThis paper analyzes the effect of exogenous urea in increased concentration gradient (0, 100, 500 and 1,000 mg L(-1)) on photosynthetic pigments (measured spectrophotometrically), uptake of (14)CO2 (using radioisotope), and urease activity (by measuring ammonia with Nessler's reagent) in leaves of Elodea densa Planch. We have observed that low concentration of urea (100 mg L(-1)) stimulates the accumulation of photosynthetic pigments and intensifies photosynthesis in E. densa, whereas high concentration (1,000 mg L(-1)) suppresses these processes.
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