Organ-wise accumulation of fluoride in Prosopis juliflora and its potential for phytoremediation of fluoride contaminated soil.
Fluoride (F) contamination is a global environmental problem, as there is no cure of fluorosis available yet. Prosopis juliflora is a leguminous perennial, phreatophyte tree, widely distributed in arid and semi-arid regions of world. It extensively grows in F endemic areas of Rajasthan (India) and has been known as a "green" solution to decontaminate cadmium, chromium and copper contaminated soils. This study aims to check the tolerance potential of P. juliflora to accumulate fluoride. For this work, P. juliflora seedlings were grown for 75 d on soilrite under five different concentrations of F viz., control, 25, 50, 75 and 100 mg NaF kg(-1). Organ-wise accumulation of F, bioaccumulation factor (BF), translocation factor (TF), growth ratio (GR) and F tolerance index (TI) were examined. Plant accumulated high amounts of F in roots. The organ-wise distribution showed an accumulation 4.41 mg kg(-1)dw, 12.97 mg kg(-1)dw and 16.75 mg kg(-1)dw F, in stem, leaves and roots respectively. The results indicated significant translocation of F from root into aerial parts. The bioaccumulation and translocation factor values (>1.0) showed high accumulation efficiency and tolerance of P. juliflora to F. It is concluded that P. juliflora is a suitable candidate for phytoremediation purpose and can be explored further for the decontamination of F polluted soils.
Department of Bioscience and Biotechnology, Banasthali University, PO Banasthali Vidyapith, Rajasthan 304 022, India.
Poonam
P
Saini
Suphiya
S
Khan
Mamta
M
Baunthiyal
Vinay
V
Sharma
D001673:Biodegradation, Environmental; D001692:Biological Transport; D005459:Fluorides / Q000302:isolation & purification* / Q000378:metabolism* / Q000633:toxicity; D009928:Organ Specificity; D029862:Prosopis / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000302:isolation & purification* / Q000378:metabolism* / Q000633:toxicity
D012987:Soil; D012989:Soil Pollutants; D005459:Fluorides