Journal Article•
Studies on the impact of fluoride toxicity on germination and seedling growth of gram seed (Cicer arietinum L. cv. Anuradha)
01 Jan 2012-Journal of Stress Physiology & Biochemistry (Siberian Institute of Plant Physiology & Biochemistry)-Vol. 8, Iss: 1, pp 194-202
TL;DR: 4.0 mM F concentration was found to be most sensitive for gram seeds and germination occurred but plants were totally dried after completion of treatment period.
Abstract: The influence of 0, 0.1 mM, 0.5 mM, 1.0 mM, 4.0 mM, 8.0 mM fluoride (F) concentration on seed germination, seedling growth of gram seeds (cv. Anuradha) was studied under laboratory condition. At the end of 15 days of treatment, significant reduction in root length, shoot length, dry weight, fresh weight, % of germination, protein content, catalase activity, tolerance index, vigour index, germination rate, germination relative index, mean daily germination were observed at increasing fluoride concentration. Total soluble sugar content, proline content, peroxidase activity, ascorbic acid oxidase activity, % DFC, % phytotoxicity of root and shoot increased along with gradual increment of F concentration. 4.0 mM F concentration was found to be most sensitive for gram seeds. At 8.0 mM F concentration germination occurred but plants were totally dried after completion of treatment period.
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TL;DR: Investigation of the effect of F on germination and phytotoxicity of four varieties of rice revealed that the variety IET-4094 was the least influenced by F compare to the other three varieties, and all the four varieties showed higher level of fluoride accumulation in root than in shoot.
55 citations
Cites background from "Studies on the impact of fluoride t..."
...In another study, Davies et al. (1998) in Aphis fabae found the ability of roots to accumulate higher amount of F than the shoot system at different concentration of NaF....
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TL;DR: In this article, a screening of F hyperaccumulators and F-tolerant plants has been performed to facilitate phytoremediation, and some plant bioindicators have been identified which can be used to analyse the extent of atmospheric F pollution.
Abstract: Fluorine, one of the most abundant elements found on earth, acts as an environmental xenobiotics even at sparingly low concentrations. Uncontrolled anthropogenic activities have steeply increased the F content in the air, water, and soil. Irrigation of crops and vegetables with F contaminated groundwater or agricultural practices in contaminated soils adversely affect their physiological and biochemical parameters, leading to inhibited growth and productivity. Some plants can translocate the toxic ions from roots to shoots and accumulate them in the edible parts. Bioaccumulations of F have hazardous outcomes, as their concentrations in edible parts can be higher than the safe value. Screening of F hyperaccumulators and F-tolerant plants has been performed to facilitate phytoremediation. Some plant bioindicators have been identified which can be used to analyse the extent of atmospheric F pollution. Cumulative use of these organisms through proper scientific planning programs can potentially improve the agricultural soil quality in terms of their toxic F content. Future research should focus on proper execution of these phytoremediative strategies via robust field trials. High throughput genetic analyses should also be performed to identify quantitative trait loci which can be exploited to generate F-tolerant characters in susceptible crop cultivars.
51 citations
TL;DR: In this paper, the uptake and accumulation of fluorides by aquatic and land plant species is studied. But, not much research has been done so far to remediate F from soil.
Abstract: Fluoride pollution is now recognized as a global problem. The reason fluorides are considered as serious contaminants even when they are present at low levels is that they persist for a long time in air, soil, and water and exert negative effects at all levels of an ecosystem. Thus, immediate attention is the need of the hour to remediate the environment from F pollution. Till date, the conventional methods have been developed primarily to remove F from water. These methods are very slow and expensive. Besides, not much research has been done so far to remediate F from soil. This review focuses on the uptake and accumulation of F by certain aquatic and land plant species. Exploring these plants by analysis of their tissues for accumulated contaminants may open up several opportunities to be utilized to remediate F rich water and soil.
43 citations
TL;DR: The results showed the effect of soil contamination with fluorine on the yield and chemical composition of fluorine depended on the species and organ of a tested plant, on the rate of the xenobotic element and on the substance added to soil in order to neutralize fluorine.
Abstract: The research was based on a pot experiment, in which the response of eight species of crops to soil contamination with fluorine was investigated. In parallel, some inactivating substances were tested in terms of their potential use for the neutralization of the harmful influence of fluorine on plants. The response of crops to soil contamination with fluorine was assessed according to the volume of biomass produced by aerial organs and roots as well as their content of N-total, N-protein, and N-NO3-. The following crops were tested: maize, yellow lupine, winter oilseed rape, spring triticale, narrow-leaf lupine, black radish, phacelia, and lucerne. In most cases, soil pollution with fluorine stimulated the volume of biomass produced by the plants. The exceptions included grain and straw of spring triticale, maize roots, and aerial parts of lucerne, where the volume of harvested biomass was smaller in treatments with fluorine-polluted soil. Among the eight plant species, lucerne was most sensitive to the pollution despite smaller doses of fluorine in treatments with this plant. The other species were more tolerant to elevated concentrations of fluorine in soil. In most of the tested plants, the analyzed organs contained more total nitrogen, especially aerial organs and roots of black radish, grain and straw of spring triticale, and aerial biomass of lucerne. A decrease in the total nitrogen content due to soil contamination with fluorine was detected only in the aerial mass of yellow lupine. With respect to protein nitrogen, its increase in response to fluorine as a soil pollutant was found in grain of spring triticale and roots of black radish, whereas the aerial biomass of winter oilseed rape contained less of this nutrient. Among the analyzed neutralizing substances, lime most effectively alleviated the negative effect of soil pollution with fluorine. The second most effective substance was loam, while charcoal was the least effective in this respect. Our results showed the effect of soil contamination with fluorine on the yield and chemical composition of fluorine depended on the species and organ of a tested plant, on the rate of the xenobotic element and on the substance added to soil in order to neutralize fluorine.
32 citations
Cites background from "Studies on the impact of fluoride t..."
...Datta et al. (2012) noticed that the mass of chickpea germinated on Petri plates decreased by 75 and 32% in response to doses of fluorine of 0.1 and 4.0 mM, respectively....
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...The results reported by Datta et al. (2012) from an experiment on the same plant demonstrated that the total protein content was 92% lower in treatments polluted with the dose of 4 mM of fluorine compared to the treatment unpolluted with this element....
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TL;DR: In this paper, the authors overviewed understanding of transport, uptake and fluoride accumulation in plants and provide insights into the fluoride-induced oxidative stress and regulatory mechanisms to cope up with it.
Abstract: Fluoride is a common pollutant which occurs in various environmental matrices considered as one of the most phytotoxic pollutants. It is essential to the living organisms in trace quantities but at its higher concentration it becomes poisonous. Excess amount of fluoride in environment not only exerts its toxic effects on human beings and animals but also on plants. Toxicological impacts of fluoride on plants have been largely debated due to reduction of growth parameters, inhibition of metabolic activities and decreased photosynthetic activity. The signs of fluoride impacts on plants may be severe, acute or chronic and toxicity of fluoride depends on dose, frequency of exposure, duration and genotype of plant. This article overviews understanding of transport, uptake and fluoride accumulation in plants and provide insights into the fluoride-induced oxidative stress and regulatory mechanisms to cope up with it. The main objective of this article is to prospect new research avenues to unravel the mechanisms explaining fluoride toxicity in various plant species.
30 citations
Cites background from "Studies on the impact of fluoride t..."
...Findings related to germination of seed and growth of seedling experiment showed a decreasing trend in root and shoot length and decreased percentage of germination with increase in fluoride concentration (Datta et al. 2011)....
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TL;DR: In this article, a multiple criteria approach is presented by which vigor was evaluated in 16 lots of soybean (Glycine max L., cv. ‘Lee-68’) seed by determining O∂ uptake, CO₂ production, uptake of labeled glucose or leucine, conversion of isotopes into ¹ ₂ and polysaccharides or proteins, and leaching of metabolites through membranes of excised embryonic axes after 5 hours of imbibition.
Abstract: A multiple criteria approach is presented by which vigor was evaluated in 16 lots of soybean (Glycine max L., cv. ‘Lee-68’) seed by determining O₂ uptake, CO₂ production, uptake of labeled glucose or leucine, conversion of isotopes into ¹⁴CO₂ and polysaccharides or proteins, and leaching of metabolites through membranes of excised embryonic axes after 5 hours of imbibition. The concept upon which this approach is based is that excised embryonic axes from vigorous seed lots take up more sugars and amino acids from imbibing media, incorporate these metabolites faster into polysaccharides and proteins, and permit less leaching of nonused metabolites into surrounding aqueous media than axes from less vigorous seed lots. These measurements focus on the biosynthetic capacity of the axis and the integrity of its cellular membranes.
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