Original title: Effect of elevated CO2 on morphological and photosynthetic parameters in two understory grass species in Beskydy Mountains
Authors: Holub, Petr ; Klem, Karel ; Urban, Otmar
Document type: Papers
Conference/Event: Quo vaditis agriculture, forestry and society under Global Change?, Velké Karlovice (CZ), 20171002
Year: 2017
Language: eng
Abstract: We transplanted two grass species, Calamagrostis arundinacea and Luzula sylvatica, to the understory of\na 10-year-old experimental mixed forest exposed to ambient (385 μmol CO2 mol–1, AC) and elevated (700\nμmol CO2 mol–1, EC) atmospheric CO2 concentration using a glass dome facility. Effects of EC on plant\nmorphology and photosynthesis were examined after three years of treatment. We tested the hypotheses\nthat shade-tolerant species can profit from EC even at low light conditions and that relatively low accumulation\nof assimilates at such light conditions will not cause CO2-induced down-regulation of photosynthesis.\nWe expected that EC can substitute insufficient light intensities under the tree canopy and lead to both\nhigher biomass production and survival of plants in deep forest understories. The typical shade-tolerant\nspecies L. sylvatica exhibited positive acclimation under EC allowing higher light use efficiency under subsaturating\nlight intensities as compared to plants grown under AC. In contrast, C. arundinacea showed\nhigher stimulation of growth and photosynthetic rates by EC mainly under saturating light intensities at\nthe beginning of the growing season, when the forest leaf area is not fully developed and the open canopy\nallows a greater proportion of incident light to reach the understory. Our data indicate that growth and\nphysiological responses of EC plants in forest understories are species specific, differ from responses of\nsun-exposed plants, and depend on degree of shading.
Keywords: Beskydy mountains; Effect of elevated CO2; photosynthetic parametrs
Project no.: LO1415 (CEP), EF16_013/0001609
Funding provider: GA MŠk, GA MŠk
Host item entry: Quo vaditis agriculture, forestry and society under global change? Conference proceeding, ISBN 978-80-87902-22-6

Institution: Global Change Research Institute AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0280278

Permalink: http://www.nusl.cz/ntk/nusl-371523


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Research > Institutes ASCR > Global Change Research Institute
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 Record created 2018-03-07, last modified 2021-11-24


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