Odziv kambija na mehansko poškodovanje in zgradba bariernih con v lesu različnih drevesnih vrst : diplomsko delo (univerzitetni študij) = Response of cambium to mechanical wounding and structure of barrier zones in wood of different tree species : graduation thesis (university studies)
Trop, Zoran
V lesu 22 drevesnih vrst iz 13 botaničnih družin smo raziskovali odziv kambija na mehansko poškodovanje in anatomijo bariernih con. Večino materiala smo pridobili na področju mesta Ptuja na obrežju ...reke Drave, del pa iz arhiva Katedre za tehnologijo lesa. Anatomske preparate poškodovanih tkiv smo pregledali s svetlobnim mikroskopom, jih opisali in fotografirali. V lesu, ki nastane pred ranitvijo, prizadeto tkivo od domnevno neprizadetega razmejuje reakcijska cona; po poškodbi ga ločuje barierna cona. Za barierno cono so pri iglavcih značilne parenhimske celice, tangencialni niz travmatskih smolnih kanalov in razširjeno trakovno tkivo. Barierne cone listavcev sestavlja bolj ali manj neurejeno, piknjavo in z obarvanimi odložinami zapolnjeno parenhimsko in/ali kalusno tkivo, ter odebeljeno in novonastalo trakovno tkivo. Traheje in vlakna praviloma manjkajo. Samo v lesu slive (Prunus domestica L.) barierno cono sestavljajo tudi travmatski kanali gume. Samo v barierni coni bukve (Fagus sylvatica L.) zasledimo anorganske vključke v obliki druz. Anatomija barierne cone pri različnih drevesnih vrstah je bolj odvisna od tipa, velikosti in časa poškodbe kot od botanične družine.
Type of material - undergraduate thesis
; adult, serious
Publication and manufacture - Ljubljana : [Z. Trop], 2005
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