Implication of organic acids in the long-distance transport and the accumulation of lead in Sesuvium portulacastrum and Brassica juncea
Articolo
Data di Pubblicazione:
2013
Citazione:
Implication of organic acids in the long-distance transport and the accumulation of lead in Sesuvium portulacastrum and Brassica juncea / T. Ghnaya, H.Zaier, R. Baioui, S. Sghaier, G. Lucchini, G.A. Sacchi, S.Lutts, C. Abdelly. - In: CHEMOSPHERE. - ISSN 0045-6535. - 90:4(2013 Jan), pp. 1449-1454.
Abstract:
The implication of organic acids in Pb translocation was studied in two species varying in shoot lead accumulation,
Sesuvium portulacastrum and Brassica juncea. Citric, fumaric, malic and a-cetoglutaric acids
were separated and determined by HPLC technique in shoots, roots and xylem saps of the both species
grown in nutrient solutions added with 200 and 400 lM of Pb(II). The lead content of the xylem saps
was determined by ICP–MS. Results showed that S. portulacastrum is more tolerant to Pb than B. juncea.
Lead concentration in xylem sap of the S. portulacastrum was significantly greater than in that of B. juncea.
For both species, a positive correlation was established between lead and citrate concentrations in xylem
sap. However minor relationship was observed for fumaric, malic and a-cetoglutaric acids. In the shoots
lead treatment also induced a significant increase in citric acid concentration. Both observations suggest
the implication of citric acid in lead translocation and shoot accumulation in S. portulacastrum and B. juncea.
The relatively high accumulation of citric acid in xylem sap and shoot of S. portulacastrum could
explain its high potential to translocate and accumulate this metal in shoot suggesting their possible
use to remediate Pb polluted soils.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Xylem sap; Organic acids; Lead; Halophyte; Glycophyte
Elenco autori:
T. Ghnaya, H.Zaier, R. Baioui, S. Sghaier, G. Lucchini, G.A. Sacchi, S.Lutts, C. Abdelly
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