20.500.12556/DiRROS-27539 Year-to-year variability in xylem and phloem traits of co-existing Fraxinus ornus, Quercus pubescens and Ostrya carpinifolia The xylem and phloem anatomy of co-existing tree species provides valuable information on how different tree species face climate change and adjust their vascular structure to local weather conditions. We examined and compared annual ring widths and conduit size in earlywood and early phloem in Fraxinus ornus, Quercus pubescens and Ostrya carpinifolia in a sub-Mediterranean site in the period 2019–2021. The selected xylem and phloem traits were correlated with monthly weather conditions (precipitation and temperature). We found that phloem increment widths and conduits in earlywood and early phloem in the studied tree species showed different trends in terms of interannual variability and in relation to local weather conditions. In F. ornus, May conditions affected xylem traits, while June conditions phloem traits. In Q. pubescens, winter and March precipitation was related to phloem development. In O. carpinifolia, xylem ring width was positively correlated with June precipitation, while early phloem conduits were negatively affected by April temperature. Only two consistent patterns were detected across the species and years studied: wider xylem increments compared to phloem increments, and wider earlywood vessels compared to early phloem sieve tubes. Statistically significant differences were observed among species across all years for the size of xylem and phloem conduits and the hydraulic conductivity of earlywood vessels, which indicates great differences in the calculated hydraulic conductivity among the tree species. To summarize, hydraulic conductivity of earlywood vessels in Q. pubescens was on average for all three years 10.4 -times and 114-times larger than in F. ornus and O. carpinifolia, respectively. High interannual variability and species-specific sensitivity of xylem and phloem traits to precipitation and temperature confirm high plasticity and different radial growth strategies of the studied tree species to ensure optimal functioning under local weather conditions. manna ash pubescent oak European hop-hornbeam earlywood early phloem wood anatomy sub-Mediterranean jesen puhasti hrast zgodnji les zgodnji floem anatomija lesa true false true Angleški jezik Slovenski jezik Znanstveno delo 2026-02-12 09:17:33 2026-02-12 09:17:34 2026-03-06 03:56:40 0000-00-00 00:00:00 2026 0 0 Nasl. z nasl. zaslona; Opis vira z dne 12. 2. 2026; str. 1-12 iss. 2 Vol. 46 2026 0000-00-00 Zaloznikova Objavljeno apc 0000-00-00 0000-00-00 0000-00-00 630*8 1758-4469 10.1093/treephys/tpag005 268200195 https://academic.oup.com/treephys/advance-article/doi/10.1093/treephys/tpag005/8444427 1 4b134a70-07eb-11f1-bcbc-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=40335 tpag005_(1).pdf tpag005_(1).pdf 1 B4C16E391F1BDAB2A7BF0EAF74775488 cdecde327cf7bd714b05a1f09ede99ab36e1313ecf4bbba5e1c222470f967f30 f83f013c-1892-11f1-81cd-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=41281 Gozdarski inštitut Slovenije 0 0 0