Facskó Ferenc (szerk.) (2012): Kutatások a Nyugat-magyarországi

Kutatások a Nyugat-magyarországi Egyetemen
gymnosperms) is under strict and complex regulation; and is a necessary, however insuffi
cient prerequisite for the assembly of the functional photosynthetic apparatus.
SKRIBANEK Anna – KISS Edina – VERESS Márton (2011): Növényzet hatása a kőzetek oldódási
viszonyaira. XIV. Karsztfejlődés konferencia, Szombathely, május 26-29. (konferencia
előadás)
SKRIBANEK Anna – SOLYMOSI Katalin – HIDEG Éva – BÖDDI Béla (2011): A tiszafa (Taxus
baccata L.) színtestjeinek ultrastruktúrája és zöldülése. Szombathely, Tudományos
Közlemények XIII. Természettudományok 13. Supplementum, pp. 65-71. HU ISBN
2006-8336, ISSN 0864-7127
RYBÁR O. – SKRIBANEK A. (2011): A növényzet szerepe a dolomit karrosodásában. Karszt és
Barlang 2010.I-II. p. 53-59. Budapest
Anna SKRIBANEK – Katalin SOLYMOSI – Éva HIDEG – Béla BÖDDI (2012): The Eff ect of Abiotic
Stressors (Light and Temperature) on Chlorophyll Biosynthesis International Scientifi
c Conference on Sustainable Development & Ecological Footprint, March 26-27,
Sopron, Hungary
Abstract – Chlorophyll biosynthesis is a light dependent process in angiosperms, while it
can proceed in most gymnosperms also in the absence of light. In this work, we have compared
the temperature dependence and the light sensitivity of chlorophyll formation in
dark-grown or dark-forced red oak (Quercus rubra L.), ginkgo (Ginkgo biloba L.) and yew
(Taxus baccata L.). Chlorophyll biosynthesis is diff erent in the stems and the leaves of red
oak seedlings, and in stem-related organs; it depends strongly on the temperature and light
intensity used during greening. Similarly to angiosperms, ginkgo seedlings can be fully etiolated
and are unable to synthesize chlorophyll in the dark, while yew plants are only partially
etiolated during dark-forcing, i.e. they accumulate both chlorophylls and the chlorophyll
precursor, protochlorophyllide in the dark. The dark-forced stems and leaves of yew have
similar pigment composition and greening. In addition, unlike ginkgo and red oak seedlings,
the greening of dark-forced yew is not much infl uenced by low temperatures.
SKRIBANEK Anna – DEÁK György – VERESS Márton (2012): Széndioxid produkció mérése
magashegységi területeken. XV. Karsztfejlődés, Szombathely konferencia előadás május
24-26.
SKRIBANEK A. – DEÁK GY. – VERESS M. (2012): Eff ect of dwarf pine vegetation on karren dissolution.
Zeitschtrift für Geomorphology (megjelenés alatt)
Abstract – Soil CO 2 content of areas with diff erent vegetation coverings was investigated
in alpine terrains (Totes Gebirge). Dissolution of limestone was compared on slopes with
vegetation patches (grass or dwarf pine) and on bare slopes. Dissolution intensity was also
studied on a model system. CO 2 measurements were performed using an infrared gas analyzaer.
Amount and role of tannin in the dissolution process was also investigated. CO 2
content of the soil was found higher under vegetation patches because of the degradation
of organic materials. It was highest under grass patches, followed by dwarf bushes, dwarf
pines with grass undergrowth and it was the lowest under dwarf pines. The CO 2 content of
the soil with no vegetation was not signifi cantly lower than that under dwarf pines.
Dissolution of limestone tablets was greater in the soil than on the surface. Temperature
and the dissolution rate did not correlate. The dissolution rate depended primarily on the
presence of water, especially in the colder seasons, whereas in the summer growing season
CO 2 produced by degradation could cause more intense dissolution under the vegetation.
The tannin and acid contents of degrading organic materials could also play a signifi cant
role in the dissolution process.
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