Uptake and distribution of caesium and its influence on the physiological processes in croton plants (Codiaeum variegatum)

• Autorzy: Bystrzejewska-Piotrowska G. , Jeruzalski M. , Urban P.
• Konferencja: Proceedings of the International Conference Bioaccumulation of Radionuclides and Heavy Metals - as a Marker of Environmental Contamination, Kazimierz Dolny upon Vistula, Poland, September 26-28, 2004
• Języki publikacji: EN

Abstrakty

EN

Croton (Codiaeum variegatum) belongs to the salinity-resistant plants. This paper presents some experimental data in order to assess usefulness of croton plants for phytoremediation of caesium-contaminated soils. The plants were grown in a greenhouse, in the soil contaminated with 0.03, 0.3, 1, 3, 5 and 10 mM CsCl solution enriched with 137Cs as a radiotracer. The croton plant demonstrated high resistance to increasing CsCl salinity of the soil. This conclusion was based on the observation that the above-ground organ fresh-to-dry weight ratio was constant. However, this value was lower for the roots. The young-to-old leaf dry weight ratio was decreasing while the concentration of CsCl in the soil was increasing. The increase in soil CsCl concentration was associated with the decrease in photosynthesis as well as a rise in the intra-tissue concentration of CO2 and increase of the CO2 stomatal conductance. Photosynthetic water utilization efficiency was constant in the range of 0.03-1 mM CsCl and it was only lower with higher CsCl concentration. This situation gives an evidence that croton plant is highly resistant to the soil CsCl salinity. The 137Cs radiotracer experiment showed the maximal accumulation of caesium with 0.3 mM CsCl, a lower one with 0.03 mM, and poor accumulation with 3 and 5 mM CsCl solutions. The transfer factor value for 137Cs (plant-to-soil) was about 10, which proved a high ability of croton plants to accumulate caesium to a high extent. However, the highest accumulation took place in the roots. The intensive phytoextraction of caesium from the soil may indicate its potential capacity for bioremediation. The reported observation warrants further studies.

Słowa kluczowe

EN

bioremediation; o caesium uptake; caesium distribution; croton plants; phytoextraction

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2004
• Tom: Vol. 49,suppl.1
• Strony: 35--38
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Bystrzejewska-Piotrowska G.

• Isotopic Laboratory, Faculty of Biology, Warsaw University, 1 Miecznikowa Str., 02-096 Warsaw, Poland, Tel.: [phone], Fax: [phone]

autor

Jeruzalski M.

• Isotopic Laboratory, Faculty of Biology, Warsaw University, 1 Miecznikowa Str., 02-096 Warsaw, Poland, Tel.: [phone], Fax: [phone]

autor

Urban P.

• Isotopic Laboratory, Faculty of Biology, Warsaw University, 1 Miecznikowa Str., 02-096 Warsaw, Poland, Tel.: [phone], Fax: [phone]

Bibliografia

• 1. Bystrzejewska-Piotrowska G, Urban PL (2003) Accumulation of caesium in leaves of Lepidium sativum and its influence on photosynthesis and transpiration. Acta Biol Cracov Bot 45:131−137
• 2. Bystrzejewska-Piotrowska G, Urban PL (2004) Accumulation and translocation of 137Cs in onion plants (Allium cepa). Environ Exp Bot 51:3−7
• 3. Feller M, Riesen T, Zehnder H-J (2000) Transfer of caesium from the xylem to the phloem in the stem of wheat. Biol Plantarum 43:309−311
• 4. Kopcewicz J, Lewak S (1998) Plant physiology. WN PWN, Warsaw (in Polish)
• 5. Zeller S, Feller M (2000) Long-distance transport of alkali metals in maturing wheat. Biol Plantarum 43:523−528