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Title:Značilnosti lesnih prirastkov v deblu in vejah oljke (Olea europaea L.)
Authors:ID Gričar, Jožica (Author)
ID Eler, Klemen (Author)
Files:.pdf PDF - Presentation file, download (413,42 KB)
MD5: AE8DB07F31FF8A33CCCDF4513DFEBFBE
 
URL URL - Source URL, visit https://ojs.sazu.si/folia_bio_geo/article/view/8073
 
Language:Slovenian
Typology:1.01 - Original Scientific Article
Organization:Logo SciVie - Slovenian Forestry Institute
Abstract:Oljka (Olea europaea L.) je gospodarsko zelo pomembna vednozelena kulturna rastlina, a je zelo malo znanega o njeni strukturi lesa v različnih delih drevesa, ki je ključna za dolgoročno preživetje drevesa. V pričujočem prispevku smo primerjali značilnosti lesnih prirastkov v deblu in vejah pri oljki v Dekanih v rastni sezoni 2016. Analizirali smo tudi prevodne elemente v lesu (traheje) v posameznih tretjinah lesnih branik. Razlike v značilnostih trahej na začetku in koncu rastne sezone ter v različnih delih drevesa smo interpretirali z vidika njihove prevajalne vloge v drevesu. V ta namen smo vzorce lesa odvzeli po zaključku rastne sezone 2016, pripravili preparate prečnih prerezov in opravili histometrične analize s pomočjo svetlobnega mikroskopa in sistema za analizo slike. Ugotovili smo, da se širine lesnih prirastkov in značilnosti trahej v deblu in vejah oljk razlikujejo. Prirastki 2016 so bili v vejah približno 54 % ožji kot v deblu, površine trahej pa od 25 % (prva tretjina) do 34 % (zadnja tretjina) manjše. Površine trahej so bile primerljive v prvi in drugi tretjini branike, medtem ko je bila v zadnji tretjini površina značilno manjša, in sicer v povprečju za 17,6 % v deblu in 25,4 % v vejah. V vseh tretjinah lesnih branik v deblu in vejah smo zabeležili negativno zvezo med povprečnimi vrednostmi površine trahej in gostoto trahej. Pri oljkah se je to odražalo v primerljivih vrednostih hidravlične prevodnosti v vseh tretjinah v deblu in vejah. Ožji prevodni elementi v vejah oljk kot posledica hormonske regulacije so v skladu z univerzalno pozitivno zvezo med velikostjo trahej in oddaljenostjo od apeksa in so povezani z večjo tenzijsko napetostjo vodnih stolpcev v trahejah vej v primerjavi z deblom. Različna struktura lesa v deblu in vejah nakazuje na različno vlogo tega tkiva v različnih delih drevesa.
Keywords:les, branika, difuzno-porozna vrsta, traheja, anatomija lesa, prevodnost, svetlobna mikroskopija
Publication status:Published
Publication version:Version of Record
Publication date:01.01.2025
Year of publishing:2025
Number of pages:str. 31-43
Numbering:Vol. 66, iss. 1
PID:20.500.12556/DiRROS-22943 New window
UDC:630*81
ISSN on article:1855-7996
DOI:10.3986/fbg0113 New window
COBISS.SI-ID:242108163 New window
Publication date in DiRROS:10.07.2025
Views:450
Downloads:242
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Record is a part of a journal

Title:Folia biologica et geologica
Publisher:Slovenska akademija znanosti in umetnosti
ISSN:1855-7996
COBISS.SI-ID:248490496 New window

Document is financed by a project

Funder:ARIS - Slovenian Research and Innovation Agency
Project number:P4-0430-2022
Name:Gozdno-lesna veriga in podnebne spremembe: prehod v krožno biogospodarstvo
Funder:ARIS - Slovenian Research and Innovation Agency
Project number:P4-0085-2020
Name:Agroekosistemi
Funder:ARIS - Slovenian Research and Innovation Agency
Project number:J4-4541-2022
Name:Hrasti za gozdove in gozdarstvo v prihodnosti: Quercus robur versus Quercus petraea

Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.

Secondary language

Language:English
Title:Characteristics of wood increments in stem and branches of olive trees (Olea europaea L.)
Abstract:Olive (Olea europaea L.) is an economically very important evergreen cultivated plant, but very little is known about its wood structure in the different tree parts, which is crucial for the long-term tree survival. Here, we compared the characteristics of xylem increments in the stem and branches of the olive trees in Dekani in 2016. We analyzed the conducting elements in the wood (vessels) in individual thirds of the xylem increments. For this purpose, xylem samples were taken after the end of the growing season of 2016 and histometric analyzes of the xylem tissue were performed using a light microscope and an image analysis system. The width of the xylem increments and the vessel characteristics differed in the stem and branches of the olive trees. The increments were about 54 % narrower in the branches than in the stem, and the vessel areas were between 25 % (first third) and 34 % (last third) smaller. Vessel areas were comparable in the first and second thirds of the xylem increment, while it was significantly smaller in the last third, on average by 17.6 % in the stem and 25.4 % in the branches. In all thirds of the xylem increments, we observed a negative relationship between average vessel area and vessel density. In the stem and branches of olive trees, this was reflected in comparable values of hydraulic conductivity in all xylem thirds. Narrower conducting elements in olive branches, as a result of hormonal regulation, are consistent with the universal positive relationship between vessel size and distance from the apex and are associated with higher tension of the water columns the vessels in the branches compared to the stem. The different structure of the xylem increments in the stem and branches indicates the different role of this tissue in different parts of the olive trees.
Keywords:wood, diffuse-porous species, vessel, wood anatomy, conductivity, light microscopy, growth ring boundary


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  1. Folia biologica et geologica

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