20.500.12556/DiRROS-7646 Sezonska dinamika ksilogeneze in floemogeneze pri navadni jelki (Abies alba Mill.) Seasonal dynamics of xyogenesis and phloiemogenesis in silver fir (Abies alba Mill.) Preučili smo dinamiko nastajanja ksilemskega in floemskega letnega prirastnegaplašča oz. branike pri navadni jelki (Abies alba) v rastni sezoni 2003. Vzorce floema, kambija in ksilema smo vsak teden vzeli iz dveh navideznozdravih odraslih jelk. Raziskave s svetlobnim mikroskopom so pokazale, da se je na floemski strani začela diferenciacija enega do dveh slojev floemskih derivatov še pred začetkom kambijeve aktivnosti. Kambijeva delitvena aktivnost se je začela hkrati na ksilemski in floemski strani v začetku maja. Kambijeva aktivnost se je zaključila konec avgusta. Diferenciacija terminalnih traheid kasnega lesa je potekala do konca oktobra, floemskih celic pa do konca septembra. Število celic, nastalih na ksilemski strani, je bilo večje kot na floemski. Zdi se, da je bila po obodu drevesa širina ksilemske branike bolj variabilna od floemske. The dynamics of xylem and phloem growth ring formation in silver fir (Abies alba Mill.) was studied during the growing season 2003. Blocks of tissue, containing phloem, cambium and outer xylem, were taken weekly from two apparently healthy silver fir trees. According to the observations of transverse sections under light microscope, the cambial cell divisional activity began in early May on the phloem and xylem side simultaneously. Priorto this activity, differentiation of one or two layers of the phloem derivatives began to take place. Cambial activity ceased at the end of August.Differentiation of the terminal late wood tracheids adjacent to cambiumwas completed by the end of October and of the phloem cell by the end of September. Cell production on the xylem side of healthy firs was more intense and the variability in widths of the growth rings across the stem circumference was also greater compared to the phloem. navadna jelka Abies alba Mill. kambij ksilem floem traheide sitaste celice diferenciacija silver fir cambium xylem phloem tracheids sieve cells differentiation true false true Slovenski jezik Angleški jezik Znanstveno delo 2017-07-12 09:18:44 2017-07-12 09:18:44 2022-08-12 14:09:19 0000-00-00 00:00:00 2005 0 0 str. 57-68 Vol. 78 2005 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*182 0351-3114 URN:NBN:SI:doc-D9VX65W2 1687206 6206978 RAZ_Gricar_Jozica_i2005.pdf RAZ_Gricar_Jozica_i2005.pdf 1 32454C19B7BFAA9B891F528DF797C1F7 79fe104d6ec7415e2496eee98d0c6a35f33f3251477071a78ea89ce239b62bb7 1fc397e4-17b5-11ed-b6b8-001a4af901a5 20.500.12556/dirros/71e26e6c-b755-4e6c-b5f2-388fdf08319d https://dirros.openscience.si/Dokument.php?lang=slv&id=9511 Gozdarski inštitut Slovenije Acta Silvae et Ligni 0 0 0