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).
Department of Environmental Sciences, Bharathiar University, Coimbatore, India.
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D
Prabha
Department of Bioenvironmental Energy, College of Natural Resource and Life Science, Pusan National University, Miryang-si, South Korea ssivaphd@yahoo.com.
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S
Sivakumar
Department of Environmental Sciences, Bharathiar University, Coimbatore, India.
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CV
Subbhuraam
Department of Health and Environment, Kosin University, Dong Sam Dong, Young Do Gu, Busan, South Korea.
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HK
Son
D001682:Biological Availability; D055598:Chemical Phenomena; D004305:Dose-Response Relationship, Drug; D004784:Environmental Monitoring; D004787:Environmental Pollution / Q000032:analysis; D018515:Plant Leaves / Q000187:drug effects / Q000378:metabolism; D018517:Plant Roots / Q000187:drug effects / Q000378:metabolism; D018547:Plant Stems / Q000187:drug effects / Q000378:metabolism; D031822:Portulaca / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism*; D012643:Selenium / Q000493:pharmacokinetics*; D012987:Soil / Q000737:chemistry
D012987:Soil; D012643:Selenium
Portulaca oleracea; accumulation; phytoremediation; regeneration; stem cutting