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Title:Učinek ultravijoličnega sevanja na smreko (Picea abies (L.) Karst) in posledice za gorski gozdni ekosistem
Authors:ID Trošt Sedej, Tadeja (Author)
Files:.pdf PDF - Presentation file, download (313,35 KB)
MD5: 34D42B5A51922F03E0EBD19B5F9B7890
PID: 20.500.12556/dirros/c26776d2-2a5a-46d4-b610-b8c18357f3a5
 
Language:Slovenian
Typology:1.01 - Original Scientific Article
Organization:Logo SciVie - Slovenian Forestry Institute
Abstract:Rastline, ki uspevajo v gorah, so pogosto izpostavljene stresnim razmeram, predvsem povečani jakosti sevanja UV-B, skrajnim temperaturnim razmeram ter pomanjkanju vode in hranil. Odziv smreke na okoljske razmere je kompleksen. Pri enoletnih iglicah v visokogorju smo izmerili manjšo fotokemično učinkovitost in vsebnost klorofilov, kar kaže na občutljivost mladih iglic, kjer zaščitni mehanizmi še niso dokončno razviti. Pri starejših iglicah razlika ni bila več statistično značilna, zato sklepamo, da se poškodbe v drugem in tretjem letu preprečijo ali popravijo. Pri dveletnih iglicah smreke z visokogorskega rastišča je bil dihalni potencial značilno manjši in vsebnostUV-B absorbirajočih snovi značilno večja, kar pojasnjujemo s tem, da so dveletne iglice z visokogorskega rastišča med tremi starostnimi razredi najbolj odporne proti UV-B sevanju. Iz rezultatov sicer ne moremo sklepati, v kolikšni meri je k odzivu rastline prispeval posamezni stresni dejavnik, vendar lahko trdimo, da je smreka razmeroma dobro prilagojena na velike jakosti UV-B sevanja in stresne razmere, kakršne vladajo v visokogorju.
Keywords:smreka, Picea abies, drevesa, UV-B sevanje, fotokemična učinkovitost, ETS, UV-B absorbirajoče snovi, vsebnost klorofila, višinski gradient, visokogorsko rastišče, stres
Publication status:Published
Publication version:Version of Record
Year of publishing:2005
Number of pages:str. 5-27
Numbering:Vol. 78
PID:20.500.12556/DiRROS-7644 New window
UDC:630*111.21
ISSN on article:0351-3114
URN:URN:NBN:SI:doc-VI34S7MB
COBISS.SI-ID:1686694 New window
Publication date in DiRROS:12.07.2017
Views:4543
Downloads:1822
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Record is a part of a journal

Title:Zbornik gozdarstva in lesarstva. forest and wood science & technology
Shortened title:Zb. gozd. lesar.
Publisher:Gozdarski inštitut Slovenije, Biotehniška fakulteta, Oddelek za gozdarstvo in obnovljive gozdne vire, Biotehniška fakulteta, Oddelek za lesarstvo
ISSN:0351-3114
COBISS.SI-ID:6206978 New window

Secondary language

Language:English
Title:The effect of enhanced UV-B radiation on Norway spruce (Picea abies (L.) Karst) in posledice za gorski gozdni ekosistem
Abstract:Norway spruce trees from the subalpine stand are exposed not only to high UV-B radiation but also to a complex of other environmental factors, suchas high photosynthetically active radiation, extreme temperature conditions, deficient water and mineral supply, which might cause stress responses. Current year needles from the subalpine stand exhibited lower photochemical efficiency and total chlorophyll content compared to samples from lower altitudes. The result suggested that young needles were most vulnerable to stress factors, since the protective mechanisms were not fully developed. Current+1 year needles from the subalpine stand exhibited lower ETSvalues and higher total UV-B absorbing compounds, which may be interpreted as most successful protection against UVB radiation of current+1 year needles among the three needle age classes. Despite the obtained results, the effect of a single stress factor on spruce could not be easily drawn out. Still, we may assume that the spruce is quite tolerant to high UV-B radiation and other extreme environmental factors in the mountains.
Keywords:Norwey spruce, trees, UV-B radiation, phptpchemical efficiency, UV-B absorbing compounds, chlorophyll content, altitude gradient, high altitude plants, stress


Collection

This document is a part of these collections:
  1. Acta Silvae et Ligni

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