Physiological responses of Lemna trisulca L. (duckweed) to cadmium and copper bioaccumulation
By M. Prasad, P. Malec, A. Waloszek, M. Bojko, K. Strzałka. 2001
336 citations recorded by the source corpus.
Abstract Aquatic plants are known to accumulate and bioconcentrate heavy metals. In this study, several physiological responses of aquatic vascular plant Lemna trisulca L. to elevated concentrations of cadmium (up to 10 mM) and copper (up to 50 μM) were investigated. It was found that Lemna fronds were able to accumulate both cadmium and copper, but Cu-treated material showed pronounced toxic symptoms at concentrations 1000-fold lower in comparison to Cd. Lemna trisulca could tolerate elevated levels of Cd, i.e. up to 10 mM, without significant changes in photosynthetic pigments concentration. On the contrary, Cu in concentrations 25 and 50 μM promoted significant pigment degradation. The main processes affected by Cd in Lemna fronds were total gas exchange and net photosynthesis. On the contrary, the inhibition of total gas exchange and net photosynthesis caused by Cu (2–50 μM) correlated with Chl a and carotenoid concentrations decrease as well as with the decay of fluorescence from PS II. Also, an increasing impact of respiration in total oxygen exchange was observed after treatment of Lemna with increasing Cd concentrations (up to 5 mM) and with Cu in concentration range between 2 and 50 μM. In Cd-treated fronds, a dose-dependent accumulation of two polypeptides with apparent molecular weights 18 and 10 kDa, respectively as well as the appearance of two smaller polypeptides (apparent molecular weights 8 and 7 kDa) was observed in SDS-PAGE. The nature of these polypeptides remains to be determined. On the contrary, in Cu-treated fronds neither accumulation of existing proteins nor appearance of any extra protein was observed.
Subfields: Industrial and Manufacturing Engineering, Plant Science, Pollution
View Paper: https://www.semanticscholar.org/paper/aeb1d0197c787037dd2c681b4f1fbdc70cfe9b4f
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Plant Science
In Pollution
Citations in the corpus
- Are Lemna spp. Effective Phytoremediation Agents (2007, background): “assimilate metals in sugars, peptides, proteins and some low-molecularweight organic acids (de Kock et al. 1973; Mazen and ElMaghraby, 1998; Bovet et al. 2000; Weiss et al. 2000; Abbas et al. 2001; Prasad et al. 2001; Yin et al. 2002; Mazen et al. 2004), which have been reported elsewhere as the nuc”
- Ecophysiological and anatomical changes due to uptake and accumulation of heavy metal in Brachiaria decumbens (2011, background): “Reduced photosynthetic activity is commonly observed in plants exposed to heavy metals (Chugh and Sawhney, 1999; Prasad et al., 2001).”
- Salicylic acid-induced adaptive response to copper stress in sunflower (Helianthus annuus L.) (2006, background): “Excess Cu has been shown to cause a reduction in chlorophyll content and inhibit some photosyntheic functions in the leaves (Prasad et al. 2001).”