Lead uptake, distribution, and remobilization in cucumber

F. Fodor, E. Cseh, Anita Varga, G. Záray

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

Mobility and distribution of lead (Pb) were investigated in cucumber (Cucumis sativus L.) grown in solution culture. Based on the observation that Pb uptake is influenced by the chemical form of iron (Fe) (complexed or ionic) in the solution, Fe distribution was also determined. Iron concentration was even in the stem (separated to internodes) and petioles but slightly increased at the shoot tip while Pb concentration decreased upwards. In the leaves Fe concentration decreased upwards (whereas in the control it increased a little at the youngest leaves) while Pb concentration increased to the largest leaves then decreased towards the shoot tip. It is suggested that the distribution of Pb in cucumber is passive process and it accumulates in the apoplast while Fe distribution is determined by the requirements of synthetic processes in young or photosynthesizing tissues. Lead probably lowers Fe transport into the symplast in the leaves causing slight chlorosis at the youngest leaves. In the plants that were loaded with Pb, decapitated and rooted again in Pb-free culture solution we found no significant remobilization of Pb which supports that Pb binds strongly to the binding sites in the apoplast or is detoxified in an immobile form.

Original languageEnglish
Pages (from-to)1363-1373
Number of pages11
JournalJournal of Plant Nutrition
Volume21
Issue number7
Publication statusPublished - 1998

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Cucumis sativus
cucumbers
Iron
Hypochromic Anemia
apoplast
leaves
iron
symplast
Binding Sites
chlorosis
petioles
internodes
binding sites
Lead
stems

ASJC Scopus subject areas

  • Plant Science

Cite this

Lead uptake, distribution, and remobilization in cucumber. / Fodor, F.; Cseh, E.; Varga, Anita; Záray, G.

In: Journal of Plant Nutrition, Vol. 21, No. 7, 1998, p. 1363-1373.

Research output: Contribution to journalArticle

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