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Analýza tvorby dřeva buku lesního (Fagus sylvatica L.) na buněčné úrovni
Mikel, Jakub
The bachelor thesis describes the analysis of the wood creation of the europen beech wood (Fagus sylvatica L.) at the cellular level. The samples of three young trees were taken at weekly intervals, for two consecutive vegatation periods in 2013 and 2014. Subscriptions took place between 2013 and 2014, using the trephor. Permanent microscopic preparations were made from mikrocores and were observed using a light microscpe. This work explores the cambial aktivity and the proces of wood formation during the year season (from March to April). By using the light microscope, the beginning of cambial activity, its maximum activity and termination was recorded. Furthemore, the course of the cell differentiation in individual phases (radial expansion, the sekundary wall formation and lignification) were observed. Measured values of radial expansion were interleaved by the curve of the Gompertz function, which set the optimal model of radial increase during the year season. The date of maximum daily gain and average increase per day was determined from obtained data. Observing the cambial aktivity and the cell diferentiation in relation to climatic conditions will help us to understand the link between the wood formation and the influenc of the environment. The obtained results were compared with the professional literature.Formula clause:yes
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Analýza variability tvorby xylému po obvodu kmene smrku ztepilého v rámci vegetačního období
Kašpar, Miroslav
Kašpar, M.: Analysis of the variability of xylene formation along the circumference of the spruce tree (Picea abies L.) during the vegetation period. Bachelor thesis. Mendel University in Brno. 2016 The bachelor thesis is focused on the analysis of the variability of xylum formation along the circumference of spruce stem in the vegetation period. Research on xylogenetic variability was carried out on the research area in Rájci-Němčice. The main task is to compare the variability of xylan production in the same old trees during the 2016 growing season. Sampling was performed at weekly intervals from 31 March to 10 November using trephor. From the collected microwells, continuous preparations were then made. The obtained data were compared with literary sources focused on similar issues.
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Monitoring tvorby dřeva a lýka smrku ztepilého (Picea abies (L.) Karst.) na mikroskopické úrovni
Gongol, Jaroslav
Jaroslav Gongol, Monitoring of Norway Spruce (Picea abies (L.) Karst.) Wood and Phloem formation at the microscopic level.The thesis deals with monitoring of the norway spruce (Picea abies (L.) Karst.) wood and phloem formation on a research plot Rájec-Němčice during the growing season of 2012 and 2013. At weekly intervals from 5.4. to 7.11. were taken 11 -microbore samples from 6 different selected trees by using trephor. From taken microbore samples were created permanent microscopic preparations, which were further evaluated under a microscope. This thesis is focused on the evaluation of cambial activity and the process of formation of wood and phloem in relation to climatic conditions. Part of this thesis was also to evaluate the resulting annual growth ring character and the influence of the formation of wood on its properties and use. The findings were compared with the literature, which has already dealt with this issue. The average length of cambium activity in 2012 was 119 days and 112 days in 2013. The average growth of wood was 55 cells in the first year and 33 cells in the second year, when the average growth of phloem was 5.3 cells and 5.2 cells.
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Monitoring tvorby dřeva a lýka buku lesního (Fagus sylvatica L.) na buněčné úrovni na výzkumné ploše Rájec - Holíkov
Veteška, Ondřej
Monitoring of cambial activity in sample trees during growing season 2013 and 2014 was the aim of this thesis. This study summarizes the findings about the variations in the cambial zone, the radial increment of stems, the differentiation process of xylem and phloem formation. The changes in cambial zone observed at the cellular level were made possible by the periodical sampling. Periodical samples - microcores were taken with the Trephor tool at weekly intervals from March to November. The permanent microscope slides were made of microcores. The number of the permanent microscope slides provided information about the actual cambial activity at the time of sampling. Variations and results of the cambial activity were evaluated in relation to the climatic conditions of the research site. The unfavorable climatic conditions were noted in the growth response of sample trees, especially in 2014. The radial xylem increment was 1012±489 µm in 2014. The maximum daily increment of xylem 13±4 µm was recorded between 29 May and 26 June 2014. The total tree ring width was 1655±444 µm in 2013. The maximum daily increment of xylem 27±13 µm was recorded between 13 June and 11 July 2013. The xylem formation lasted for 91 days in 2013. The xylem formation was 9 days shorter in 2014.
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Analýza tvorby dřeva buku lesního na výzkumné ploše Rájec-Holíkov
Porvalík, Radim
This bachelor thesis presents xylem formation of common beech (Fagus sylvatica L.) on sample plot in Rájec-Holíkov in one year period,specifically exeptionally dry year 2015. Total of 6 trees were used as sample trees of which micro bores were obtained around the grith with the Trephor apparathus in chronological order from 23rd March to 12th November, once in a week. In laboratory, the samples were processed into permanent slides and analysed with a light microscope. The processes of xylem growth and xylem maturing from the initial phase to the complete differentiation were observed. First symthomps of initial phase and cambium activity occurred when mean day temperature reached 7,5 °C corresponding to end of April and start of the May. The secondary cell wall and gradual lignification occurred from 4th June 2015 (155 DOY) to 20th August 2015 (232 DOY). Fully lignified cells were occurring gradually until October. Total growth of tree ring lasted 90 days. The mean size of newly formed tree ring size 1235 µm according to Gompertz function.
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Monitoring tvorby dřeva smrku ztepilého (Picea abies (L.) Karst.)
Gongol, Jaroslav
Jaroslav Gongol, Monitoring of Norway Spruce Wood Formation (Picea abies(L.)Karst.) The bachelor thesis deals with monitoring xylem formation of Norway spruce (Picea abies(L.)Karst.) in the Rájec-Němčice research area in 2012. At weekly intervals during vegetation period from 5. 4. to 1. 11. microbore samples were taken from 6 selected trees by using trephor. From microbore samples were created permanent microscopic slides, which were evaluated under the microscope. This thesis is focused on the evaluation of cambial activity of wood formation process in relation to climatic conditions. Part of this thesis is also to determine the resulting nature of growth rings and to assess the effect of wood formation on its properties and use. The findings were compared with the literature, which has already dealt with similar issue. The average length of cambium activity in 2012 was 4 months. Xylem increment for each sampler ranged from 20 to 100 layers of cells.
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