Studies of laser biostimulation on sowing value of seeds and yield of tomato (Lycopersicon esculentum Mill.) and cucumber (Cucumis sativus L.) plants
Krzysztof Klimont
k.klimont@ihar.edu.plKrajowe Centrum Roślinnych Zasobów Genowych, Instytut Hodowli i Aklimatyzacji Roślin, Radzików (Poland)
Abstract
The effect of He-Ne laser irradiation on seed sowing value and on the fruit yield of Betalux and Promyk tomato cultivars and cucumber cv. Polan F1, was examined. Before sowing, seeds were exposed to He-Ne laser light, with the wave length of 632.8 nm and the power of 4 mW/cm2. Four variants were evaluated: control-without biostimulation and three irradiation doses (double, fourfold and sixfold). In the laboratory, before sowing, standard germination and seed and seedling vigour were determined. In the field the following parameters were evaluated: emergence (cucumber), fruit yield, fruit number and weight of the individual fruit. Biostimulation of seeds of cv. Promyk with double dose of energy resulted in the highest yield and weight fruit. The remaining doses caused non significant increased the fruit yield. The highest weight of the individual fruit was obtained from plants originated from seeds sixfold irradiated. Irradiation of seeds of Betalux tomato cultivar did not influence significantly the fruit yield, fruit number and weight. Pre-sowing irradiation of cucumber seed with higher doses of energy stimulated field emergence, and all applied doses of laser light treatment caused increase the fruit yield of cucumber. Higher yield resulted from significantly higher number of harvested fruits with slightly lower in individual fruit weight. Germination capacity of seeds of both tomato cultivars was differentiated dependently on irradiation dose, but germination of cucumber seed did not change in comparison to control. Growth test showed significant impact of laser energy on length of hypocotyl and primary root produced by tomato and cucumber seeds. Seedlings of tomato and cucumber grown from stimulated seeds cumulated more dry weight than those from control seeds. Irradiation treatment of tomato and cucumber seeds did not influenced seed vigour assessed by the conductivity test. Pre-sowing irradiation caused the increase of percentage of normal seedling only in case of tomato, cv. Betalux in the accelerated ageing test.
Supporting Agencies
Keywords:
biostimulation, laser, seeds, cucumber, fruit yield, tomato, seed sowing valueReferences
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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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