171. Annual cambial rhythm in Pinus halepensis and Pinus sylvestris as indicator for climate adaptationPeter Prislan, Jožica Gričar, Martin De Luis, Klemen Novak, Edurne Martinez Del Castillo, Uwe Schmitt, Gerald Koch, Jasna Štrus, Polona Mrak, Magda Tušek-Žnidarič, Katarina Čufar, 2016, original scientific article Abstract: To understand better the adaptation strategies of intra-annual radial growth in Pinus halepensis and Pinus sylvestris to local environmental conditions, we examined the seasonal rhythm of cambial activity and cell differentiation at tissue and cellular levels. Two contrasting sites differing in temperature and amount of precipitation were selected for each species, one typical for their growth and the other represented border climatic conditions, where the two species coexisted. Mature P. halepensis trees from Mediterranean (Spain) and sub-Mediterranean (Slovenia) sites, and P. sylvestris from sub-Mediterranean (Slovenia) and temperate (Slovenia) sites were selected. Repeated sampling was performed throughout the year and samples were prepared for examination with light and transmission electron microscopes. We hypothesized that cambial rhythm in trees growing at the sub-Mediterranean site where the two species co-exist will be similar as at typical sites for their growth. Cambium in P. halepensis at the Mediterranean site was active throughout the year and was never truly dormant, whereas at the sub-Mediterranean site it appeared to be dormant during the winter months. In contrast, cambium in P. sylvestris was clearly dormant at both sub-Mediterranean and temperate sites, although the dormant period seemed to be significantly longer at the temperate site. Thus, the hypothesis was only partly confirmed. Different cambial and cell differentiation rhythms of the two species at the site where both species co-exist and typical sites for their growth indicate their high but different adaptation strategies in terms of adjustment of radial growth to environmental heterogeneity, crucial for long-term tree performance and survival.
Keywords: Aleppo pine, Pinus halepensis, Scots pine, Pinus sylvestris, cambium, light microscopy, Mediterranean environment, temporate environment, transmission electron microscopy, xylem
Published in DiRROS: 12.07.2017; Views: 3241; Downloads: 1466
 Full text (4,63 MB)
This document has many files! More... |
172. Obhodnja v enodobnih smrekovih gozdovih ter vpliv ekonomsko-tehničnih pogojev nanjoMartin Čokl, 1968, treatise, preliminary study, study Keywords: gozdarstvo, smreka, prirastek lesa, struktura gozdov, lesna zaloga, debelina lesa, donos, premer dreves
Published in DiRROS: 12.07.2017; Views: 3107; Downloads: 749
Full text (4,76 MB) |
173. Zveza med širino branike in električno upornostjo živih tkiv pri jelki (Abies alba Mill.) na RavnikuTom Levanič, Niko Torelli, Martin Zupančič, 1997, original scientific article Keywords: jelka, Abies alba, širina branike, električna upornost, Ravnik, Slovenija
Published in DiRROS: 12.07.2017; Views: 4586; Downloads: 1921
Full text (599,76 KB) |
174. |
175. |
176. Bioindikation in belasteten und unbelasteten GebietenFranc Batič, Cvetka Ribarič-Lasnik, Barbara Kruhar-Lorger, Dieter Grill, Edith Stabentheiner, Helmut Mayrhofer, Marietta Koch, Martin Grube, 1993, treatise, preliminary study, study Published in DiRROS: 12.07.2017; Views: 2650; Downloads: 672
Full text (8,49 MB) |
177. |
178. |
179. |
180. |
