Spectral changes in the leaves of barley plant due to phytoremediation of metals-results from a pot study

This research studied the changes in leaf reflectance spectra (350-2500 nm) due to metal phytoextraction into barley plants grown in metal-spiked soils (3 levels of Cd, Pb, As and their metal-mixture treatments). Growth of barley was adversely affected due to 100 mg As kg -1 and metal-mixture (10 Cd...

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Bibliographic Details
Published in:European journal of remote sensing 2015-01, Vol.48 (1), p.283-302
Main Authors: Rathod, Paresh H., Brackhage, Carsten, Van der Meer, Freek D., Müller, Ingo, Noomen, Marleen F., Rossiter, David G., Dudel, Gert E.
Format: Article
Language:English
Subjects:
Barley
Cadmium
Chlorophyll
Correlation
Correlation analysis
Lead
Leaves
metal-contamination
Metals
Phytoextraction
Phytoremediation
Plants
Reflectance
Regression analysis
Regression models
Spectra
spectral reflectance
vegetation indices
Water stress
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Summary:This research studied the changes in leaf reflectance spectra (350-2500 nm) due to metal phytoextraction into barley plants grown in metal-spiked soils (3 levels of Cd, Pb, As and their metal-mixture treatments). Growth of barley was adversely affected due to 100 mg As kg -1 and metal-mixture (10 Cd+150 Pb+100 As; mg kg -1 ) treatments. Metal phytoextraction were in order of: root>straw≥leaves >grains. Results of reflectance spectra of leaves show the influence of As-treatment only, causing spectral changes in visible and infrared domains mostly, as apparent from the significant correlation between leaf-As and leaf-spectra. Chlorophyll and water stress indices and band depths analyses showed significant correlations to leaf-As, and can be used to distinguish metal-stressed plants. Finally, regression models demonstrate the potential use of hyperspectral reflectance data to monitor plant health during phytoremediation process and to estimate leaf-As in barley, particularly in this study.
ISSN:2279-7254
2279-7254
DOI:10.5721/EuJRS20154816