0465984 - ÚVGZ 2017 RIV PL eng J - Článek v odborném periodiku
Stojanović, Marko - Čater, M. - Pokorný, Radek
Responses in young Quercus petraea: coppices and standards under favourable and drought conditions.
Dendrobiology. Roč. 76, jan (2016), s. 127-136. ISSN 1641-1307. E-ISSN 2083-8387
Grant CEP: GA MŠMT(CZ) EE2.3.20.0267
Výzkumná infrastruktura: CzeCOS II - 90061
Institucionální podpora: RVO:67179843
Klíčová slova: coppice * standards * comparison * photosynthetic response * quantum yield * light conditions * drought response
Kód oboru RIV: EF - Botanika
Impakt faktor: 0.776, rok: 2016
DOI: https://doi.org/10.12657/denbio.076.012

Assimilation and photosynthetic efficiency (maximal quantum yield) of young oaks were compared
in coppice and standard sessile oak stands of comparable age (100 years) under different light intensity
categories: under minimum light – ISF < 20%, low light – 20%<ISF<25%, medium light – 25%<ISF<30%
and in the open, without mature canopy cover – ISF >30% during favourable and drought conditions.
Measurements of maximal assimilation rates were performed at a constant temperature of the measurement
block (20°C), a CO2 concentration of 400 μmol/l, flow 500 μmol/s and different light intensities: 0,
50, 250, 600, 1200 and 1800 μmol/m2s during three consecutive growing seasons (2012, 2013 and 2014).
In every category at least 8 young naturally regenerated seedlings and sprouts of different coppice stools
were measured. The quantum yield in optimal conditions in standards was highest in the category of closed
canopy, while in coppices in medium light category. During severe drought in 2013 the drop in efficiency
of standards was evident in all categories, while in coppices no differences in efficiency were observed between
favourable 2012 and 2013 with expressed drought stress, proving the advantage of young coppices
over standards in this particular light category. However, the beneficial effects of restoration coppicing are
not guaranteed. It is our belief that in time such advantage might decrease; it would be therefore interesting
to compare responses in time and define, when response abilities of both studied systems become equal.
Trvalý link: http://hdl.handle.net/11104/0264436