1. Investigation of arsenic accumulation and tolerance potential of Sesuvium portulacastrum (L.) L.
- Author
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Lokhande, Vinayak H., Srivastava, Sudhakar, Patade, Vikas Y., Dwivedi, Sanjay, Tripathi, R.D., Nikam, T.D., and Suprasanna, P.
- Subjects
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ARSENIC metabolism , *THIOLS , *PLANT development , *PHOTOSYNTHETIC pigments , *MALONDIALDEHYDE , *CYSTEINE proteinases , *HAZARDOUS waste sites , *PROLINE - Abstract
Abstract: Sesuvium portulacastrum (L.) L., a facultative halophyte, is considered a suitable candidate for the phytoremediation of metals. An investigation of As accumulation and tolerance was conducted in Sesuvium plants upon exposure to As(V) (100–1000μM) for 30d. Plants demonstrated a good growth even after prolonged exposure (30d) to high As(V) concentrations (1000μM) and a significant As accumulation (155μgg−1 dry weight) with a bioaccumulation factor of more than ten at each concentration. The results of shoot and root dry weight, malondialdehyde accumulation, photosynthetic pigments, and total soluble proteins demonstrated that plants did not experience significant toxicity even at 1000μM As(V) after 30d. However, metabolites (total non-protein thiols and cysteine) and enzymes (serine acetyltransferase, cysteine synthase and γ-glutamylcysteine synthetase) of thiol metabolism, in general, remained either unaffected or showed slight decline. Hence, plants tolerated high As(V) concentrations without an involvement of thiol metabolism as a major component. Taken together, the results indicate that plants are potential As accumulator and may find application in the re-vegetation of As contaminated sites. [ABSTRACT FROM AUTHOR]
- Published
- 2011
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