Abstract
The aim of this study was to investigate the effects of silicon in alleviating cadmium stress in maize plants grown in a nutrient solution and to evaluate the potential of the spectral emission parameters and the ratio of red fluorescence (Fr) to far-red fluorescence (Ffr) in assessing the beneficial effects of Si. An experiment was carried out using a nutrient solution with a toxic dose of Cd and six doses of Si; biomass, Cd, Si, and photosynthetic pigments of the plants were measured. Chlorophyll (Chl) a fluorescence analysis demonstrated that Si alleviated Cd toxicity in plants. Chl fluorescence measurements were sensitive in detecting such effects even when significant changes in biomass production and concentrations of photosynthetic pigments were not observed. The spectral emission and the Fr/Ffr ratio were sensitive to the effects of Si. Silicon caused a reduction in the translocation of Cd to the shoots of maize plants.
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Abbreviations
- Chl:
-
chlorophyll
- ChlF:
-
Chl fluorescence
- Fr:
-
red fluorescence
- Ffr:
-
far-red fluorescence
- LED:
-
light emitting diode
- Fv :
-
variable Chl a fluorescence
- Fm :
-
maximum Chl a fluorescence
- Fo :
-
minimal Chl a fluorescence
- qP :
-
coefficient of photochemical quenching
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Silva, A.J., Nascimento, C.W.A. & Gouveia-Neto, A.S. Assessment of cadmium phytotoxicity alleviation by silicon using chlorophyll a fluorescence. Photosynthetica 55, 648–654 (2017). https://doi.org/10.1007/s11099-016-0680-1
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DOI: https://doi.org/10.1007/s11099-016-0680-1