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Regulátory rostlinného růstu a jejich možné využití při produkci okrasných dřevin
Hajdová, Pavla
At the experimental plot in the area of Faculty of Horticulture in Lednice was created attempt to determine the effect of growth regulators on the model plant ( Spiraea bumalda 'Anthony Waterer ' ) growing in containers. The purpose was according to morphological and physiological parameters to determine whether the application of growth regulators reduce the effect of stress factors affecting the quality of plants . Growth regulators for this experiment were - abscisic acid, 24 - epibrassinolid, kinetin and spermine (each at three different concentrations ) . It was a total of 12 variants and one control. Of the morphological parameters were evaluated: weight fresh biomass, weight of dried biomass, area of leaf, length of shoots, root collar diameter . Of the physiological parameters were evaluated - index the content of chlorophyll in leaves and chlorophyll fluorescence . The obtained data were statistically analyzed and then compared the effect of various phytohormones. The resulting effect in terms of importance for nursery production was the effect of 24 -epibrassinolidu the most measured parameters.
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Regulácia dormancie hľúz ľuľku zemiaku (Solanum tuberosum L) odvodených v in vitro podmienkach
Maco, Roman
Potato tubers were induced on MS medium with reduced nitrogen content. It was monitored dormancy length, size and weight of tubers and the impact of reduced nitrogen to the tubers as well. Thesis also studied the impact of various substances (FLD, AgNO3, ABA, CEPA, sorbent ethylene) on dormancy. It was stated production of ethane, ethylene and CO2 by gas chromatography. The oxygen content was determined by an oxygen detector. Substances FLD, AgNO3 and sorbent ethylene had stimulatory effects on sprouting and also the reduction of dormancy. ABA and CEPA caused inhibition of sprouting and extension of dormancy. All substances thus increased oxygen consumption and CO2 production. The concentration of ethane was at low values under the control at all applied materials. It pointed out that there was no damage to the meshes. Effect of reduced nitrogen was not very significant and actually differed in only one variant.
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