20.500.12556/DiRROS-7529 Annual cambial rhythm in Pinus halepensis and Pinus sylvestris as indicator for climate adaptation 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. Aleppo pine Pinus halepensis Scots pine Pinus sylvestris cambium light microscopy Mediterranean environment temporate environment transmission electron microscopy xylem alepski bor Pinus halepensis Pinus sylvestris kambij svetlobna mikroskopija mediteransko podnebje rdeči bor zmerno podnebje transmisijska elektronska mikroskopija ksilem true false true Angleški jezik Ni določen Znanstveno delo 2017-07-12 09:14:51 2017-07-12 09:14:51 2022-08-12 13:55:51 0000-00-00 00:00:00 2016 0 0 Nasl. iz nasl. zaslona; Opis vira z dne 11. 1. 2017; El. publikacija v formatu PDF obsega 15 str.; 15 str. article 1923 Vol. 7 2016 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*81:630*11(045)=111 1664-462X 10.3389/fpls.2016.01923 4650150 3011663 Prislan2016.pdf Prislan2016.pdf 1 5FFAAF4E564B3D3055A4BD822EE2D3E0 224a823b32f96fbda16d9507969e6c4f33f77f3ad95976a838dc23804ef35447 1643bfaf-17b5-11ed-b6b8-001a4af901a5 20.500.12556/dirros/9ee3aada-6ba4-4509-ae5e-3dd28f6752bb https://dirros.openscience.si/Dokument.php?lang=slv&id=9382 https://www.frontiersin.org/articles/10.3389/fpls.2016.01923/full 1 https://dirros.openscience.si/Dokument.php?lang=slv&id=20114 Gozdarski inštitut Slovenije 0 0 0