Jožica Gričar (Author), Katarina Čufar (Author), Uwe Schmitt (Author)

Abstract

Proučili smo diferenciacijo terminalnih traheid kasnega lesa v dormantnem obdobju pri 10 navidezno zdravih odraslih jelkah (Abies alba) s pomočjo svetlobne in transmisijske elektronske mikroskopije. Vzorci lesa in kambija so bili odvzeti iz živih dreves v oktobru, novembru in marcu. Kambijeva celična delitvena aktivnost se je pri vseh drevesih zaključila v oktobru, medtem ko je proces diferenciacije v najmlajših traheidah ob kambiju pri drevesih s širšimi branikami še vedno potekal. V novembru so bile pri vseh drevesih celične stene terminalnih traheid kasnega lesa dokončno oblikovane inlignificirane. Celična delitvena aktivnost kambija ter diferenciacija sta se pri drevesih s širšimi branikami zaključili kasneje kot pri drevesih z ožjimi branikami. V vseh proučenih drevesih se je proces diferenciacije v terminalnih traheidah kasnega lesa zaključil pred zimo.

Keywords

navadna jelka;traheide kasnega lesa;celična stena;diferenciacija;lignifikacija;dormanca;svetlobna mikroskopija;transmisijska elektronska mikroskopija;

Data

Language: Slovenian
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL BF - Biotechnical Faculty
Publisher: Zveza lesarjev Slovenije: GZS, Združenje lesarstva
UDC: 630
COBISS: 1120137 Link will open in a new window
ISSN: 0024-1067
Parent publication: Les
Views: 910
Downloads: 371
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Other data

Secondary language: English
Secondary title: Differentiation of terminal latewood tracheids in silver fir during dormant period
Secondary abstract: The differentiation of terminal latewood tracheids of silver firs (Abies alba) was studied during dormant period. Samples of wood and cambium were taken from 10 apparently healthy mature trees in the middle of October, November and March. According to light microscopy and transmission electron microscopy, cambial cell-divisional activity was completed in all investigated trees in October, whereas process of differentiation was still ongoing in the youngest tracheids close to the cambium in trees with broader annual xylem growth rings. Cell wall formation and lignification of terminal latewood tracheids were completed in all trees in November. The cambial cell-divisional activity and also differentiation ended later in trees with broader annual xylem growth rings. However, differentiation of terminal latewood tracheids in all investigated trees was completed before winter.
Secondary keywords: silver fir;latewood tracheids;cell wall;differentiation;lignification;dormancy;light microscopy;transmission electron microscopy;
URN: URN:NBN:SI
File type: application/pdf
Type (COBISS): Not categorized
Pages: str. 412-415
Volume: ǂLet. ǂ55
Issue: ǂšt. ǂ12
Chronology: 2003
ID: 1745459