Influence of heavy metals in root chemistry of Cyperus vaginatus R.Br:A study through optical spectroscopy

Aryal, Rupak and Nirola, Ramkrishna and Beecham, Simon and Sarkar, Binoy (2016) Influence of heavy metals in root chemistry of Cyperus vaginatus R.Br:A study through optical spectroscopy. International Biodeterioration and Biodegradation, 113. pp. 201-207. ISSN 0964-8305

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Abstract

Phyto-sequestration of heavy metals originating from urban runoff entering into wetland systems is one of the ways to mitigate the pollution. Due to the chemical environment of runoff wetlands, the plants and especially their roots are often stressed. While growing on contaminated environment, wetland plants undergo a number of physio-chemical changes in their roots, stems and leaves in the form of ecological adaptations. In this study, the three category samples of the macrophyte Cyperus vaginatus R.Br. growing in a wetland, near to the wetland (<20 m) and far from the wetland (>100 m) were collected to determine heavy metals and organic matter status in roots. This study revealed hyperaccumulation of metals in plants growing in the wetland compared to nearby and far from the wetland. Statistical analysis showed metals accumulating pattern to be distinct for each sampling category based on location. The UV spectra of C. vaginatus root produced a distinct shoulder peak at 324 nm whereas the plants growing far from the wetland showed a spectroscopic shoulder at 267 nm. The plant root growing near to wetland showed both shoulders at 324 nm and 267 nm but with reduced peak height. Statistical analysis of UV spectra also followed location specificity pattern. UV spectral result was further validated by FTIR analysis where plants growing in wetland and near to wetland possessed spectra similar to UV spectral results. This observation leads us to conclude that C. vaginatus R.Br. exhibited changes in root chemical composition to tolerate metal toxicity and perform phytoaccumulation.

Item Type:
Journal Article
Journal or Publication Title:
International Biodeterioration and Biodegradation
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2300/2311
Subjects:
ID Code:
140623
Deposited By:
Deposited On:
27 Jan 2020 13:55
Refereed?:
Yes
Published?:
Published
Last Modified:
18 Sep 2020 05:19