The influence of the laser biostimulation on the yield and seed quality of spring barley (Hordeum vulgare L.)
Krzysztof Klimont
k.klimont@ihar.edu.plKrajowe Centrum Roślinnych Zasobów Genowych, Instytut Hodowli i Aklimatyzacji Roślin, Radzików (Poland)
Abstract
The effect of the laser light on seeds sowing value and yield of Rataj and Klimek barley cultivars was examined. Seeds were exposed to He-Ne laser light with the wave length of 632.8 nm and the power of 4 mW/cm2. Laboratory and field experiments were conducted using control seeds and seeds irradiated with tree (doses: double, fourfold and sixfold) of laser light. Before sowing, standard germination, seed health and seedling vigour were determined. After harvest the sowing value and chemical composition of seeds derived from plants grown from biostimulated and non-biostimulated seeds were assessed. In the field experiments the following parameters were determined: the seed yield and its structure plants/m2, height of plants, ear length, number of the kernels in the ear and thousand seeds weight. Pre-sowing biostimulation of seeds of both cultivars favourably affected the yield, and fourfold and six fold doses of irradiation caused significant yield increase of Klimek cultivar. Pre-sowing seed treatment with laser light influenced yield structure. The stimulating effect of laser on height of plants and thousand seeds weight (cv. Klimek)was noticed. Field emergence of irradiated seeds depended on the cultivar, irradiation dose and weather conditions in the year of harvest. There were no differences in germination capacity of seeds irradiated with different doses. However germination capacity of seeds harvested from plants grown from biostimulated seeds was higher than from non-irradiated. Viability of seeds that were exposed to laser light was lower. Seedlings grown from irradiated seeds cumulated less dry weight than that from control seeds. In both cultivars the accelerated ageing test showed the percentage increase of vigorous seeds and germinating seeds (cv. Rataj) after laser irradiation. Growth test showed that double dose influenced favourably growth of plumula, and all doses of irradiation did not modify the length of root. Tetrazolium tests showed, that irradiated barley seeds lowered their vigour. The highest six fold dose tend to limit the occurrence of pathogens in seeds of Klimek cultivar. Pre-sowing seeds irradiation did not affect the protein and starch content, but increased the fibre content in seeds of cv. Rataj.
Supporting Agencies
Keywords:
biostimulation, barley, laser, germination, seed, yieldReferences
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Authors
Krzysztof Klimontk.klimont@ihar.edu.pl
Krajowe Centrum Roślinnych Zasobów Genowych, Instytut Hodowli i Aklimatyzacji Roślin, Radzików Poland
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