Monitoring the sensitivity of selected crops to lead, cadmium and arsenic
Journal Title: Журнал ÑтреÑÑ-физиологии и биохимии - Year 2011, Vol 7, Issue 4
Abstract
Heavy metals are highly toxic environmental pollutants. In plants, these compounds cause numerous slighter or stronger toxic effects. They inhibit root and shoot growth and yield production, affect nutrient uptake and homeostasis, and are frequently accumulated by agriculturally important crops. Effects of heavy metals on five selected species of agricultural crops were monitored. We focused our attention to general and commonly used stress indicators such as seed germination, weight and length of roots and shoots. Each of these characteristics was dependent on the tested plant species and tested heavy metals. Dosage of lead (500 mg/l) had little effect on seed germination, cadmium (300 mg/l) significantly affected seed germination of pea and barley, arsenic (100 mg/l) caused total inhibition of seed germination in all tested plant species. Plants grow in soil contaminated with heavy metals showed several symptoms of metal toxicity (chlorosis, necrosis of leaf tips, blackening of roots). In general, the highest tolerance to tested metal ions was observed in both varieties of bean, and the lowest sensitivity was observed in soybean plants. The highest degree of toxicity was shown to have tested doses of cadmium and arsenic, the lowest the doses of lead. In general, the lowest tolerance indexes were determined based on the decrease in fresh weight of roots.
Authors and Affiliations
B Piršelova
Keywords
Related Articles
- EP ID EP119336
- DOI -
- Views 110
- Downloads 0
EFFECT OF Cu AND Mn TOXICITY ON CHLOROPHYLL FLUORESCENCE AND GAS EXCHANGE IN RICE AND SUNFLOWER UNDER DIFFERENT LIGHT INTENSITIES
Copper (Cu) and manganese (Mn) are essential micronutrients for plants, but toxic at high concentrations. Responses of rice (Oryza sativa L.) and sunflower (Helianthus annuus L.) to toxic concentrations of Mn and Cu (up...
Effect of temperature on body temperature and resting metabolic rate in pups of Eothenomys miletus
In order to investigate the ability of ambient temperature and thermoregulation in Eothenomys miletus, body temperature and resting metabolic rate (RMR) were measured during postnatal development (1-49 day) when E. mile...
Evaluation and Genetic Polymorphism studies of Jatropha (Jatropha curcus) for Water Stress Tolerance
Jatropha (Jatropha curcus) is an alternative resource for biodiesel. To boost the rural economy in sustainable manner it is estimated that 30 Million hector plantation may replace current use of fossil fuel. Although Jat...
Effects of Light Intensity on Development and Chlorophyll Content in the Arabidopsis Mutant Plants with Defects in Photosynthesis
The developmental stages and adaptability to different light intensity (150 µmol*m-2*s-1 and 100 µmol*m-2*s-1) in Arabidopsis mutant lines with defects of photosynthetic apparatus were analyzed. Plant development in the...
Toxic Effect of Cigarette Origin Tobacco Leaf (Nicotiana tabaccum L.) and Cigarette Smoke Extract on Germination and Bio-Chemical Changes of Bengal Gram (Cicer arietinum L.)
A study has been conducted to observe the toxic effect of leachate from cigarette origin tobacco leaf and extracts of cigarette smoke on Bengal gram (Cicer arietinum L.). Results showed that germination index significant...