chromium toxicity and tolerance in plants

Chromium toxicity in plants Heavy metals like Zn, Fe, Cu, Mn are essential for plant growth and important constituents of many enzymes of metabolic importance. Various past and recent studies highlight the biogeochemistry of Cr in the soil-plant system. Plant. Evaluation of chromium phyto-toxicity, phyto-tolerance, and phyto-accumulation using biofuel plants for effective phytoremediation. Sukinda is a major mining site of Odisha, India, polluted by chromium, which is highly toxic in its hexavalent form. Cr exists in several oxidation states but the most stable and common forms are Cr(0), Cr(III) and Cr(VI) species. It is the seventh most abundant metal due to its wide applications at the industrial scale (Panda and Choudhury, 2005). The Sukinda valley is a rich source of chromites, amounting to almost 95% of Cr available in India, and is the fourth most polluted site worldwide. Other metals like Pb, Cd, As, Se, Cr and Al are biologically non-essential and toxic above certain threshold levels. International Journal of … S.K. ... Delhaize, E.P. YadavHeavy metals toxicity in plants: an overview on the role of glutathione and phytochelatins in heavy metal stress tolerance of plants South … (2019). Chromium is also one of the toxic heavy metals and it is categorized as an important environmental contaminant. In our experiment, germination and viability of seeds were negatively affected by elevated Cr concentration. Chromite mining activities are indispensable for production of goods and services. Physiol., 107, 315-321 (1995). This review traces a plausible link among Cr speciation, bioavailability, phytouptake, phytot … Chromium (Cr) is a potentially toxic heavy metal which does not have any essential metabolic function in plants. Chromium toxicity however depends on its oxidation state. [6] Shanker A.K. Journal of Plant Nutrition, 25, 2389-2407. chromium in some plants cultivated along the bank of river Ribilia at. Chromium can exist in its elemental form (chromium 0) as well as chromium III and chromium VI ‑ the Roman numerals denote the valency. (Fig. (2003). [5] Mei B., Puryear J.D. Cr plant tolerance and phytoremediation. In the past decades the increased use of chromium (Cr) in several anthropogenic activities and consequent contamination of soil and water have become an increasing concern. Physiological, biochemical and molecular aspects of chromium toxicity and tolerance in selected crops and tree species. Literature survey shows that very few workers have reported ameliorative measures for Cr toxicity in crop plants. Excess Cr Assessment of Cr tolerance and accumulation in selected plant species, Plant and Soil, 247, 223-231. 1). Evaluation of chromium phyto-toxicity, phyto-tolerance, and phyto-accumulation using biofuel plants for effective phytoremediation. 5. and R. Ryan: Aluminum toxicity and tolerance in plants. Natural soil typically contains between 10 and 50 mg of chromium for every kg of soil. Amin H(1), Ahmed Arain B(1), Abbasi MS(2), Amin F(3), Jahangir TM(4), Soomro NU(1). Chromium Chromium in Soil and Plants. This is largely due the reason that most of the research has been focused on enhancing phytoaccumulation of Cr by plants and trees for its use in phytoremediation. Chromium (III) is less toxic than chromium (VI). & Newton R.J. (2002). Chromium is a naturally occurring element in rocks and soil. Author information: (1)a Institute of Plant Sciences , … Cr toxicity in plants depends on its valence state. Plants show a great variation in their tolerance to Cr in the environment and Cr toxicity depends upon the plant species and the source (Lopez-Luna et al., 2009). Aluminum toxicity and tolerance in plants of seeds were negatively affected by elevated Cr.... 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