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Author(s): Bhumika Yadu, S Keshavkant

Email(s): skeshavkant@gmail.com

Address: School of Studies in Biotechnology, Pt. Ravishankar Shukla University, Raipur - 492 010, India.

Published In:   Volume - 29,      Issue - 1,     Year - 2016

DOI: Not Available

ABSTRACT:
Fluoride (F) is one of the strong electronegative element, exists ubiquitously in the variety of environment such as soil, water, air, and also in the plants with varying degrees. It is a non-biodegradable and hazardous pollutant. Availability of F above the permissible limit (more than 1.5 ppm, WHO, 1998) results into contamination of water and soil, detrimental impacts in almost all plants, and is a serious health hazard throughout the world. In general, F enters into plants via two main routes: firstly, through acrial deposition, and secondly, from the soil and water into the roots of the plants. Accumulation of F in the rhizosphere exerts negative impacts in the overall growth responses and metabolism of plants including seed germination, growth and development, mineral nutrition, photosynthesis, respiration, protein synthesis, activities of cellular enzymes, alterations in gene expression patterns, etc. In addition, several abiotic stresses, including F exposure, cause over production of reactive oxygen species (ROS) thereby oxidative injury in plants and its parts. ROS are a group of free radicals such as singlet oxygen: 'O,, superoxide anion: 0,, hydrogen peroxide: H;O,, and hydroxyl radical: OH", derived from O, These are characterized as highly reactive, unstable, and cyto-toxic molecules, It has largely been proven that over production of ROS frequently leads to macromolecular oxidation, followed by free radical attack over membrane phospholipids resulting damaged membranes via peroxidation of lipid moieties, and depolarization of mitochondrial membranes. In this investigation, an attempt has been made to scrutinize the adverse impacts of exogenous F (NaF) on carly secdlings of Cajanus cajan L Five days after exposure of Cajauns cajan L. seeds to F, significant alteration in germination index, vigour index, length of the radicles, tissue viability status (tetrazolium staining capacity) and membrane stability index were discemible. Moreover, above listed amendments were found to be related closely with increasing amounts of both ROS and lipid peroxidation product, under F toxicity. In conclusion, F mediated inhibition in growth and development of Cajanus cajan L. was an outcome of oxidative injury.

Cite this article:
Yadu and Keshavkant (2016). Fluoride-Induced Oxidative Injuries in Cajanus cajan L. Journal of Ravishankar University (Part-B: Science), 29(1), pp.187-188.


References not available.

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