Počet záznamů: 1

Effect of Elevated Carbon Dioxide Concentration on Carbon Assimilation under Fluctuating Light

SYSNO ASEP	0384364
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Effect of Elevated Carbon Dioxide Concentration on Carbon Assimilation under Fluctuating Light
Tvůrce(i)	Holišová, Petra (UEK-B)_{RID, SAI} Zitová, Martina (UEK-B) Klem, Karel (UEK-B)_{RID, ORCID, SAI} Urban, Otmar (UEK-B)_{RID, ORCID, SAI}
Celkový počet autorů	4
Zdroj.dok.	Journal of Environmental Quality - ISSN 0047-2425 Roč. 41, č. 6 (2012), s. 1931-1938
Poč.str.	8 s.
Jazyk dok.	eng - angličtina
Země vyd.	US - Spojené státy americké
Klíč. slova	carbon ; light ; beech ; spruce ; carbon assimilation ; elevate carbon ; dioxide concentration ; mol ; photosynthetic ; assimilation ; carbon dioxide ; dioxide ; concentracion ; leave ; photosynthetic efficiency
Vědní obor RIV	EH - Ekologie - společenstva
CEP	ED1.1.00/02.0073 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
	GAP501/10/0340 GA ČR - Grantová agentura ČR
	LM2010007 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy
	IAA600870701 GA AV ČR - Akademie věd
Institucionální podpora	RVO:67179843 - RVO:67179843
UT WOS	000311262400024
DOI	10.2134/jeq2012.0113
Anotace	Natural fluctuations in light intensity may significantly affect the amount of CO assimilated by plants and ecosystems. Little is known, however, about the interactive effect of dynamic light conditions and atmospheric CO concentrations. The hypothesis that elevated CO concentration (EC; 700 μmol CO mol) increases photosynthetic efficiency in dynamic light environments as compared to ambient CO concentration (AC; 385 μmol CO mol) was tested. Sun leaves of European beech ( L.) and current-year shoots of Norway spruce [ (L). Karst.] were exposed to five dynamic light regimes (LRs) occurring within forest canopies due to variable cloud cover or self-shading of leaves and to a steady-state LR. The LRs differed in the time course of incident irradiance, whereas the overall duration (600 s) and total amount of radiation (35.88 mmol photons m) were the same in all LRs. The EC treatment enhanced the amount of CO assimilated under all LRs tested. While the stimulation was only 37 to 50% in beech, it was 52 to 85% in spruce. The hypothesis that photosynthetic efficiency is stimulated by EC was confirmed in LRs when the leaves were pre-exposed to low light intensity and photosynthetic induction was required. By contrast, only a minor effect of EC treatment was found on the rate of induction loss and postillumination CO fixation in both species studied.
Pracoviště	Ústav výzkumu globální změny
Kontakt	Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268
Rok sběru	2013

Počet záznamů: 1