20.500.12556/DiRROS-7524 Nastajanje ksilemske in floemske branike pri bukvah, poškodovanih v žledolomu Formation of xylem and phloem in Europena beech tree after ice storm damage Po žledolomu leta 2014 je v gozdovih ostalo veliko poškodovanih dreves. Ker znanja o nastajanju lesa in skorje v poškodovanih drevesih primanjkuje, smo v Arboretumu Volčji Potok opravili raziskavo vpliva žledoloma na nastajanje lesa in skorje na drevesih, ki so v žledolomu pretrpela poškodbo krošnje. Izbrali smo 14 bukev, jih razvrstili v 4 razrede glede na stopnjo poškodovanosti krošnje (K % nepoškodovana, A % do 50 %, B % med 50 in 75 %, C % več kot 75 % poškodovana krošnja). V dvotedenskih intervalih smo iz njih odvzemali mikro-izvrtke z orodjem Trephor. Iz mikro-izvrtkov smo pripravili preparate lesa, kambija in skorje in jih analizirali s svetlobnim mikroskopom in sistemom za analizo slike. Poškodovane bukve so proizvedle od 20 do 95 % ožje ksilemske branike kot nepoškodovane, manjši je bil tudi prirastek floema. Izmed štirih razredov poškodovanosti so se pri bukvi največje razlike v debelinski rasti pokazale med razredoma A in B. After the severe ice storm in 2014, numerous damaged trees were not removed from forests. Due to the lack of general knowledge about the processes occurring in damaged trees, a study involving 14 European beeches was conducted in the Arboretum Volčji Potok. Trees were categorized by crown injury; injury class K % undamaged, A % damaged less than 50 %, B % damaged between 50 and 75 %, and C % damaged more than 75 %. During the 2014 growing season, micro-cores were collected every fortnight using a Trephor tool. Changes in crowns were also observed and noted. Transverse sections of micro-cores were prepared and observed using light microscopy and an image analysis system. Xylem growth rings were 20 to 95 % narrower in damaged beech trees compared to the undamaged trees. Damaged trees also produced narrower phloem rings. The biggest differences in cambial activity in beech appeared between Class A and Class B. bukev Fagus sylvatica žledolom poškodbe krošnje nastajanje lesa ksilem kambij Trephor beech Fagus sylvatica ice storm crown injury wood formation xylem cambium Trephor true false true Slovenski jezik Angleški jezik Znanstveno delo 2017-07-12 09:14:49 2017-07-12 09:14:49 2022-08-12 13:55:27 0000-00-00 00:00:00 2016 0 0 str. 3-13 Vol. 110 2016 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*81:630*17:630*42(045)=163.6 2335-3112 10.20315/ASetL.110.5 4679334 266761216 asetl-110-2.pdf asetl-110-2.pdf 1 19B5E9CA7EA2738CCE6AE053ADB43EFB b57c70b233679d4225849c53300d8479a0e93f2f558e54795af374e386ec17d9 15f7790b-17b5-11ed-b6b8-001a4af901a5 20.500.12556/dirros/49411f0b-7c15-4255-a8f4-8656b202f9f0 https://dirros.openscience.si/Dokument.php?lang=slv&id=9378 Gozdarski inštitut Slovenije Acta Silvae et Ligni 0 0 0