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Photosynthetic induction in broadleaved Fagus sylvatica and coniferous Picea abies cultivated under ambient and elevated CO2 concentrations

SYSNO ASEP	0333853
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Ostatní články
Title	Photosynthetic induction in broadleaved Fagus sylvatica and coniferous Picea abies cultivated under ambient and elevated CO2 concentrations
Author(s)	Košvancová, Martina (UEK-B) Urban, Otmar (UEK-B)_{RID, ORCID, SAI} Šprtová, Miroslava (UEK-B)_{RID, SAI} Hrstka, M. (CZ) Kalina, J. (CZ) Tomášková, Ivana (UEK-B) Špunda, V. (CZ) Marek, Michal V. (UEK-B)_{RID, ORCID, SAI}
Number of authors	8
Source Title	Plant Protection Science. - : Czech Academy of Agricultural Sciences - ISSN 1212-2580 Roč. 177, - (2009), s. 123-130
Number of pages	8 s.
Language	eng - English
Country	CZ - Czech Republic
Keywords	gas exchange ; photosynthetic limitations ; photosynthetic down-regulation ; Rubisco specific activity ; stomatal conductance
Subject RIV	ED - Physiology
R&D Projects	OC08022 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	IAA600870701 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
CEZ	AV0Z60870520 - UEK-B (2005-2011)
Annotation	The hypothesis that elevated CO2 leads to a faster induction of photosynthesis was tested using seedlings of Fagus sylvatica and Picea abies exposed to ambient (385 ppm; AC) and elevated CO2 (700 ppm; EC). The presumptions were: EC (1) reduces the content of Rubisco in leaves, (2) decreases stomatal conductance, and (3) has no effect on the rates of stomatal opening and Rubisco activation upon illumination. Reductions of Rubisco and light-saturated stomatal conductance were observed in both EC treated tree species; however, the presumption of constant induction rates was not confirmed. Thus, EC treatment led to the stimulation of the initial phase of induction demonstrated by the higher induction state 60s after leaf illumination. In contrast, the stimulation of the secondary phase of induction, reflecting stomatal opening and described by the time required to reach maximum steady-state photosynthesis, was only 5-15% in F. sylvatica and 21-28% in P. abies.
Workplace	Global Change Research Institute
Contact	Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268
Year of Publishing	2010

Number of the records: 1