Template-Type: ReDIF-Article 1.0 Author-Name: V. Chalupa Author-Workplace-Name: Czech University of Agriculture, Faculty of Forestry and Environment, Prague, Czech Republic Title: In vitro propagation of Tilia platyphyllos by axillary shoot proliferation and somatic embryogenesis Abstract: In vitro propagation of Tilia platyphyllos Scop. has been achieved by axillary shoot proliferation and somatic embryo-genesis. The influence of tree age, explant source, genotype, and phytohormones on micropropagation of juvenile and mature trees of Tilia platyphyllos has been investigated. Nodal segments and shoot tips were used as initial explants for axillary shoot proliferation. Low concentration of cytokinin (BA, BPA, TDZ) plus auxin (IBA) stimulated fast shoot multiplication. Microshootsexcised from proliferating cultures were rooted on low salt medium and produced trees were planted in the field. Embryo-genic tissues were initiated from zygotic embryos cultured on MS medium supplemented with 2,4-D. After transfer of embryogenic tissues with developing embryoids on media lacking 2,4-D and supplemented with low concetration of IBA, the development of somatic embryos was enhanced. Secondary somatic embryogenesis led to the formation of new adventive somatic embryos. Trees produced from somatic embryos were planted in the field and exhibited normal growth and morphology. Keywords: in vitro propagation, somatic embryogenesis, micropropagation, Tilia platyphyllos, field growth of micropropagated trees, organogenesis, somatic embryo, cytokinin, auxin, axillary shoot proliferation, embryogenic tissue, thidiazuron, phytohormone Journal: Journal of Forest Science Pages: 537-543 Volume: 49 Issue: 12 Year: 2003 DOI: 10.17221/4722-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4722-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200312-0001.txt Handle: RePEc:caa:jnljfs:v:49:y:2003:i:12:id:4722-JFS Template-Type: ReDIF-Article 1.0 Author-Name: C.Y. Liao Author-Workplace-Name: Institute of Soil and Water Conservation, Chinese Academy of Sciences & Ministry of Water Resources, Yangling, Shaanxi, China Author-Name: V.V. Podrázský Author-Workplace-Name: Institute of Soil and Water Conservation, Chinese Academy of Sciences & Ministry of Water Resources, Yangling, Shaanxi, China Author-Name: G.B. Liu Author-Workplace-Name: Institute of Soil and Water Conservation, Chinese Academy of Sciences & Ministry of Water Resources, Yangling, Shaanxi, China Title: Diameter and height growth analysis for individual White Pine trees in the area of Kostelec nad Černými lesy Abstract: Four theoretical growth functions, Mitscherlich, Logistic, Gompertz and Korf functions, were applied to the growth data on dbh and tree height of individual Eastern White Pine (Pinus strobus) trees to model their growth. The current increments, mean increments and relative growth rates of dbh and height as functions of age were given by derivation from the best fit growth functions. The growth processes of dbh and height were divided into three periods by the inflexion points of the corresponding current increment curves. Keywords: Eastern White Pine (Pinus strobus L.), growth analysis, Gompertz function, Korf function, Logistic function, Mitscherlich function Journal: Journal of Forest Science Pages: 544-551 Volume: 49 Issue: 12 Year: 2003 DOI: 10.17221/4723-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4723-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200312-0002.txt Handle: RePEc:caa:jnljfs:v:49:y:2003:i:12:id:4723-JFS Template-Type: ReDIF-Article 1.0 Author-Name: E. Feliksik Author-Workplace-Name: Agricultural University, Faculty of Forestry, Department of Forest Climatology, Cracow, Poland Author-Name: S. Wilczyski Author-Workplace-Name: Agricultural University, Faculty of Forestry, Department of Forest Climatology, Cracow, Poland Title: Diversification of increment reactions of Douglas fir (Pseudotsuga menziesii Franco) from mountainous regions of southern Poland Abstract: Dendroclimatological research presented in this paper concerns Douglas fir (P. menziesii) at 17 sites located in the area of the Sudetes Mountains, the Polish part of the Carpathians and Roztocze. The methods of principal components analysis, response function and coefficients of convergence allowed the researchers to determine that the factor which integrated chronologies and determined the annual rhythm of changes in radial increment of the trees under research was the thermal conditions of winter preceding the vegetation season. Thermal conditions and summer rainfall had a slightly smaller impact on the tree increment. The influence of thermal and pluvial conditions on the process of xylem cell formation changed as longitude changes occurred. The pressure of winter temperatures and summer rainfall increased with an increase in the degree of climate continentality. On the other hand, the role of summer temperatures decreased. Despite these differences, the rhythm of annual changes in tree-ring width of Douglas fir from the Sudetes, Carpathians and Roztocze is highly similar. Southern Poland can be considered as dendrochronologically homogeneous for this species. We can distinguish two areas that are dendroclimatologically homogeneous. Keywords: Douglas fir, dendroclimatology, tree ring Journal: Journal of Forest Science Pages: 552-558 Volume: 49 Issue: 12 Year: 2003 DOI: 10.17221/4724-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4724-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200312-0003.txt Handle: RePEc:caa:jnljfs:v:49:y:2003:i:12:id:4724-JFS Template-Type: ReDIF-Article 1.0 Author-Name: J. Kobliha Author-Workplace-Name: Czech University of Agriculture, Faculty of Forestry and Environment, Prague, Czech Republic Author-Name: M. Hajnala Author-Workplace-Name: Czech University of Agriculture, Faculty of Forestry and Environment, Prague, Czech Republic Author-Name: V. Janeček Author-Workplace-Name: Czech University of Agriculture, Faculty of Forestry and Environment, Prague, Czech Republic Title: Testing of lime tree (Tilia cordata Miller) clones Abstract: Previous experiences with breeding of lime tree (Tilia cordata Miller) in European countries are shown in this paper. The first results were obtained from the evaluation of juvenile planting of lime tree (Tilia cordata Miller) in the Czech Republic, founded in the School Forest Enterprise Kostelec nad Černými lesy. Lime tree clones (initially cultivated in vitro) were evaluated for growth parameters and also according to the growth form of the different clones. Individual clones were also checked for mortality. Keywords: clonal test, plant growth, growth form, Tilia cordata Miller Journal: Journal of Forest Science Pages: 559-574 Volume: 49 Issue: 12 Year: 2003 DOI: 10.17221/4725-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4725-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200312-0004.txt Handle: RePEc:caa:jnljfs:v:49:y:2003:i:12:id:4725-JFS Template-Type: ReDIF-Article 1.0 Author-Name: J. Feuereisel Author-Workplace-Name: Mendel University of Agriculture and Forestry, Faculty of Forestry and Wood Technology, Brno, Czech Republic Title: Game appreciation in legislative conditions of the Czech Republic Abstract: An analysis was made of the present situation concerning game appreciation in the Czech Republic. A study was conducted into effective laws and regulations related to the valuation of nature. There is no legally binding directive for game appreciation in the Czech Republic at the present time. A questionnaire method (Contingent Valuation Method - CVM) was used to survey the activities of all 87 authorised experts in game management currently registered in the Czech Republic. It was found out that the game is appreciated as property, which contradicts to its legal status (res nullius). The most frequently used methods of game appreciation are a yield (demand) method and a comparative method. It is necessary to establish legal conditions under which the social value of all game species and other wildlife could be determined in order to ensure their survival and to strengthen the tools of their protection. The legislation in force authorises the Ministries of Agriculture and of the Environment of the Czech Republic to issue a relevant decree. Keywords: game management, game appreciation, game losses Journal: Journal of Forest Science Pages: 575-579 Volume: 49 Issue: 12 Year: 2003 DOI: 10.17221/4726-JFS File-URL: http://jfs.agriculturejournals.cz/doi/10.17221/4726-JFS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/jfs-200312-0005.txt Handle: RePEc:caa:jnljfs:v:49:y:2003:i:12:id:4726-JFS