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vol. 2, nr. 4 (2003)
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Influence of laser biostimulation of carrot seeds on the elastic properties and some selected chemical root components
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Maria Mikos-Bielak1, Roman Koper2
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1 Department of Chemistry, University of Agriculture, ul. Akademicka 15, 20-950 Lublin |
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2 Department of Physics, University of Agriculture, ul. Akademicka 13, 20-950 Lublin |
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vol. 2 (2003), nr. 4,
pp. 823-832
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abstract:
Carrot seeds of Karotan cv. were subjected to the pre-sowing laser biostimulation with various light rates. The seeds were used in the field experiment. After harvest, root chemical composition was analyzed. The content of dry matter, reducing and soluble sugars, crude fiber, protein and polyphenols were determined. Changes in the macro- and microelements, toxic metals and nitrate levels were evaluated as well. Changes of the root elasticity module in plastic bags at ambient temperature were recorded for 10 days. It was found that seed laser biostimulation diminished the content of dry matter, crude fiber, K, Ca, Mg, Fe and NO3- . At the same time, concentration of reducing and soluble sugars, Cu, Zn, Pb, Cd and Ni was increased. Most of changes in the chemical composition depending on the biostimulation radiation rate occurred in the sinusoidal shape. It confirms earlier observations that biostimulation radiation rate should be chosen individually for every plant species. Roots of the biostimulated plants had higher values of the elasticity modules directly after harvest and during storage than control roots. Triple laser radiation ensuring surface density of about 4 mW cm-2 may be recommended for the carrot seed biostimulation.
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keywords:
laser biostimulation, elasticity module, chemical composition
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original in:
Polish
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