|
|
Charakteristika biologických znaků, průběhu dormance a fenologie u vybrané skupiny broskvoní
Sýkora, Jaroslav
The aim of the diploma thesis was to find out the termination date of endogenous dormancy of bud flowers within the selected set of apricot varieties and simultaneously keep track of the development of various phases of microsporogenenesis. The last goal was to capture the phenological indicators of flowering and fruit development. The experimental part describes material and methodology tested on the peach varieties at Horticultural Faculty in Lednice in a two-year experiment during 2013-2014. The temperature curve was significantly different in both years. Year 2013 was characterized by gradual and lengthty progression of low temperatures, and by late termination of endogenous dormancy. Year 2014 was entirely unlike the previous one in its rapid progression of above-average temperatures and dynamic emersion of varieties from dormancy. After evaluating the results the varieties were divided into three groups with short, medium and long period preceding the termination of dormancy. The results of the observation of microsporogenesis phases shows that development of each phase is not uniform in all varieties of monitored peaches. The pollen grains development rate is greatly influenced by the temperature curve. Varieties with late termination of dormancy and slow development of microsporogenesis phases are less susceptible to impairment of the flower buds by late spring frosts.
|
|
|
The evaluation of seed properties of Lathyrus pratensis and Vicia cracca and their employment in permanent grasslands.
KRATOCHVÍLOVÁ, Eva
The theme of the thesis are climbing legumes meadow vetchling (Lathyrus pratensis) and tufted vetch (Vicia cracca). The literature search defines watched kinds of legumes and their occurence in permanent grassland. There is summarized seed growing of legumes because of its problematic production. Legumes are valuable components of grassland especially thanks to fixation of nitrogen and high capacity of proteins. The practical part is focused on observation of floristic compilation of watched locations for three years. Particular locations were compared from the point of view of changes in land management and weather. Pods and seeds of observed kinds were collected and evaluated in single years. Experiments of seed's field germination were done after different period from picking and in case of various treatment.
|
|
|
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.
|
|
| |
|
| |
|
|
Biological characteristics and grow conditions for climbing legumes in permanent grasslands
KRATOCHVÍLOVÁ, Eva
This bachelor´s work is focused on the climbing legumes. Literature review summarizes the importance and ecological requirements of species of meadow vetchling (Lathyrus pratensis) and tufted vetch (Vicia cracca) and describes vegetation types with the occurrence of climbing legumes. Legumes are excellent forage, but they also contain some antinutritional substances and are often attacked by pests and diseases. Production of seed is difficult because of uneven ripening, dehiscent pods, seed dormancy and hard seeds. In the practical part were at selected localities conducted botanical images. These localities were compared with each other in terms of vegetation composition. On the localities were collected pods of monitored species. Seeds were after shelling used to determine seedling and germination.
|
|
| |
|
| |
|
| |
|
| |
guest ::
