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The anatomy of "blue ring" in the wood of Pinus nigra = Anatomija "modre branike" v lesu črnega bora Pinus nigraCrivellaro, Alan ...Lesno-anatomske posebnosti branik pogosto uporabljamo za ugotavljanje specifičnih dogodkov v zvezi s podnebjem, okoljem in stresom, ki jim je izpostavljeno drevo med rastjo. Med pomembnimi dejavniki ... so nizke temperature, ki lahko vplivajo na diferenciacijo lesa, predvsem na odlaganje lignina. Nedavno so ugotovili, da je učinek nizkih temperatur na potek lignifikacije viden na mikroskopskih preparatih lesa, ki jih dvojno obarvamo s safraninom (ki obarva lignin rdeče) in astra modrim (ki obarva celulozo modro). To novo anatomsko posebnost so poimenovali "modra branika". V študiji smo raziskali anatomsko zgradbo modrih branik na prečnih in vzdolžnih (radialnih) prerezih lesa črnih borov (Pinus nigra Arnold), ki so rasli nad zgornjo gozdno mejo. Cilj raziskave je bil pojasniti, ali je pomanjkljiva lignifikacija vidna po celotni dolžini traheid in ali so obokane piknje, ključne za prevajanje vode, lignificirane. Rezultati kažejo pomanjkljivo lignifikacijo vzdolž traheid in v obokanih piknjah. Na osnovi rezultatov sklepamo, da pojav modre branike zmanjšuje varnost transporta vode in vpliva na slabše mehanske lastnosti lesa.Source: Les = Wood. - ISSN 0024-1067 (Letn. 67, št. 2, nov. 2018, str. 21-28)Type of material - article, component part ; adult, seriousPublish date - 2018Language - englishCOBISS.SI-ID - 2993801
Author
Crivellaro, Alan |
Reverenna, Marco |
Ruffinatto, Flavio |
Urbinati, Carlo |
Piermattei, Alma
Topics
les |
lignifikacija |
branike |
značilno leto |
celična stena |
traheide |
piknje |
piknje
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Crivellaro, Alan | ![]() |
Reverenna, Marco | ![]() |
Ruffinatto, Flavio | ![]() |
Urbinati, Carlo | ![]() |
Piermattei, Alma | ![]() |
Source: Personal bibliographies
and: SICRIS
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