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Investigation of chromium phytoremediation and tolerance capacity of a weed, P ortulaca oleracea L . in a hydroponic system
Author(s) -
Kale Rohit A.,
Lokhande Vinayak H.,
Ade Avinash B.
Publication year - 2015
Publication title -
water and environment journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 37
eISSN - 1747-6593
pISSN - 1747-6585
DOI - 10.1111/wej.12106
Subject(s) - hoagland solution , phytoremediation , shoot , portulaca , hydroponics , horticulture , dry weight , sugar , chromium , proline , chemistry , cutting , carotenoid , irrigation , biomass (ecology) , botany , agronomy , biology , heavy metals , food science , environmental chemistry , biochemistry , organic chemistry , amino acid
The present investigation was undertaken to study the growth, biomass, physiological‐biochemical responses and chromium ( C r) accumulation capacity of hydroponically grown P ortulaca oleracea cuttings exposed to H oagland solution supplemented with C r( VI ) (0.0, 0.1, 0.5, 1.0, 2.5, 5.0, 10 mg/ L ) for 30 days. The cuttings exhibited effective regeneration in H oagland solution in comparison to deionized water. Plants demonstrated significant reduction in growth (root and shoot length, leaf area), biomass (root and shoot dry weight), pigments (total chlorophylls and carotenoids) and total soluble sugar content at higher concentration of C r( VI ) (10 mg/ L ). However, plants could tolerate C r stress through significantly higher accumulation of proline and increased activity of peroxidase resulting in significant C r accumulation (150–190 mg/kg dry weight) in harvestable parts of P ortulaca . Thus, the results suggest application of P . oleracea for phytoremediation of C r‐contaminated sites for the protection of environment.