Responses of Portulaca oleracea Linn. to selenium exposure.
The present study was investigated to evaluate the uptake and accumulation of selenium (Se) by the stem cuttings of Portulaca oleracea L. grown in alfisol amended with various concentrations of Se. P. oleracea accumulated a maximum of 63.4 µg g(-1) dry weight in a short growth period of 42 days. The order of accumulation of Se among the plant parts was leaves (31.5 μg g(-1)) > stems (16.4 μg g(-1)) > roots (15.5 μg g(-1)). The accumulation potential was fourfold higher than the plant available concentration of 15.2 μg g(-1) of Se g(-1) of soil (diethylenetriaminepentaacetic acid extracted). Although the plant was able to accumulate Se in their tissues, increase in Se concentrations in soil caused a concentration-dependent decrease in the growth rate of plants (regeneration of leaves, number of leaves, number of roots, root length, stem length and biomass).
['Prabha|D|D|', 'Sivakumar|S|S|', 'Subbhuraam|C V|CV|', 'Son|H K|HK|']
D001682:Biological Availability D055598:Chemical Phenomena D004305:Dose-Response Relationship, Drug D004784:Environmental Monitoring D004787:Environmental Pollution D018515:Plant Leaves D018517:Plant Roots D018547:Plant Stems D031822:Portulaca D012643:Selenium D012987:Soil
Portulaca oleracea accumulation stem cutting regeneration phytoremediation