The Light Quanta Modulated Physiological Response of Brassica JunceaSeedlings Subjected to Ni(II) Stress
In: Engineering in Life Sciences, Jg. 7 (2007-06-01), Heft 3, S. 259-267
Online
serialPeriodical
Zugriff:
This work is a study of the inter‐relationship between parameters that principally affect the metal up‐take in the plant. The relationships between the concentration of metal in the growth medium, Cs, the concentration of metal absorbed by the plant, Cp, and the total biomass achieved, M, all of which are factors relevant to the efficiency of phytoremediation of the plant, have been investigated via the macro‐physiological response of Brassica junceaseedlings to Ni(II) stress. The factorial growth experiments treated the Ni(II) concentration in the agar gel and the diurnal light quanta (DLQ) as independently variable parameters. Observations included the evidence of light enhancement of Ni toxicity at the root as well as at the whole plant level, the shoot mass index as a possible indicator of shoot metal sequestration in B. juncea, the logarithmic variation of Cpwith Csand the power‐law dependence of Mon Cp. The sum total of these observations indicates that for the metal accumulator B. juncea with regard to its capacity to accumulate Ni, the overall metabolic nature of the plant is important – neither rapid biomass increase nor a high metal concentration capability favor the removal of high metal mass from the medium, but rather the plant with the moderate photosynthetically driven biomass growth and moderate metal concentrations demonstrated the ability to remove the maximum mass of metal from the medium. The implications of these observations in the context of the perceived need in phytoremediation engineering to maximize Cpand Msimultaneously in the same plant, are discussed.
Titel: |
The Light Quanta Modulated Physiological Response of Brassica JunceaSeedlings Subjected to Ni(II) Stress
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Autor/in / Beteiligte Person: | Dasgupta‐Schubert, N. ; Alexander, S. ; Sommer, L. ; Whelan, T. ; Alfaro Cuevas Villanueva, R. ; Mendez Lopez, M. E. ; Persans, M. W. |
Link: | |
Zeitschrift: | Engineering in Life Sciences, Jg. 7 (2007-06-01), Heft 3, S. 259-267 |
Veröffentlichung: | 2007 |
Medientyp: | serialPeriodical |
ISSN: | 1618-0240 (print) ; 1618-2863 (print) |
DOI: | 10.1002/elsc.200620187 |
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