Effects of Pb and Cd on cucumber depending on the Fe-complex in the culture solution

Research output: Contribution to journalArticle

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Abstract

Modifying effects of EDTA and citrate as Fe(III)-complexes on Pb- and Cd-toxicity were investigated with cucumber (Cucumis sativus L.) grown in culture solution. Pd and Cd were applied in 10μM concentration. Pb and Cd inhibited the growth of plants with Fe-citrate but with Fe-EDTA only Cd did. Chlorophyll content of Cd-treated plants - independently on Fe-complex - was very low similarly to the iron deficient plants. Pb is proved to inhibit the chlorophyll accumulation only in plants supplied with Fe-citrate. Photosynthetic activity of 6-week-old plants was characterized by in vivo CO2 fixation. The highest activities were observed in the middle (third- fourth) leaf storeys, and decreased in the lower and higher leaf storeys. Cd caused more than 50% inhibition of the photosynthetic activity when applied with Fe-EDTA. With Fe-citrate, the inhibition exceeded 90%. The photosynthetic activities in the Pb-treated plants were not significantly different from the control plants. The amount of chlorophyll containing complexes, especially that of PSI was highly affected by Cd particularly in the lower leaves. The results correlate with 59Fe translocation into the shoot. Fe translocation was stimulated by Pb in the presence of Fe-EDTA but it was inhibited in the presence of Fe-citrate. Cd completely inhibited Fe translocation from the root to the shoot with both chelators. It is concluded that strong iron deficiency has a great but not exclusive role in the observed symptoms, and that the quality of the chelator strongly influences the effects of these polluting metals.

Original languageEnglish
Pages (from-to)434-439
Number of pages6
JournalJournal of Plant Physiology
Volume148
Issue number3-4
Publication statusPublished - 1996

Fingerprint

Cucumis sativus
cucumbers
citrates
EDTA (chelating agent)
Citric Acid
Edetic Acid
Chlorophyll
chelating agents
chlorophyll
Chelating Agents
iron
Iron
leaves
shoots
signs and symptoms (plants)
metals
plant growth
toxicity
Metals
Growth

Keywords

  • chlorophyll-proteins
  • CO<inf>2</inf> fixation
  • Cucumis sativus
  • Fe-complexes
  • Fe-uptake and -translocation
  • heavy metal toxicity

ASJC Scopus subject areas

  • Plant Science

Cite this

Effects of Pb and Cd on cucumber depending on the Fe-complex in the culture solution. / Fodor, F.; Sárvári, E.; Lang, Ferenc; Szigeti, Z.; Cseh, E.

In: Journal of Plant Physiology, Vol. 148, No. 3-4, 1996, p. 434-439.

Research output: Contribution to journalArticle

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AU - Szigeti, Z.

AU - Cseh, E.

PY - 1996

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