Faculty of Biology, University of Latvia
Hard copy: ISSN 1691–8088
On-line: ISSN 2255–9582
Env Exp Biol (2013) 11: 151–157
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Environmental and

Env Exp Biol (2013) 11: 151–157

Original Article

Enhanced biomass production in sudangrass induced by co-treatment with copper and EDTA

Irma Tari*, Péter Poór, Attila Ördög, Árpád Székely, Gábor Laskay, István Bagi
Department of Plant Biology, University of Szeged, H-6701 Szeged, Középfasor 52., P.O. Box 654, Hungary
*Corresponding author, E-mail: tari@bio.u-szeged.hu


Three-month soil experiments were conducted to examine the effects of copper (Cu2+) treatment in combination with EDTA on biomass production of sudangrass [Sorghum sudanense (Piper) Stapf cv. Akklimat]. Cu accumulation increased in the leaves at 10–7 – 10–6 M Cu2+ concentrations but it did not rise further in the presence of 200 or 300 μM EDTA. Treatment with 10–7 M Cu2+ in the presence of 300 µM EDTA enhanced fresh mass accumulation and photosynthetic activity as well as increased the total sugar content in all parts of plants. The effect of higher Cu2+ supply (10–6 M) in combination with 300 μM EDTA was not so obvious; the maximal rate of CO2 fixation was lower than in plants exposed to 10–7 M Cu2+ + 300 μM EDTA combination and the increases in stem and root biomass were not significant in these plants. Soluble sugar concentration increased with Cu2+ concentration and 300 μM EDTA in all plant parts. These results show that the application of Cu2+ fertilization in combination with suitable concentration of EDTA can be a useful strategy to increase the biomass production of sudangrass.

Key words: biomass, copper, EDTA, photosynthesis, PSI, PSII, soil culture, soluble sugars, sudangrass.

Env Exp Biol (2013) 11: 151–157
 DOI: http://doi.org/10.22364/eeb

Prof. Gederts Ievinsh
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University of Latvia

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