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Comparison of photosynthetic induction and transient limitations during the induction phase in young and mature leaves from three poplar clones
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SYSNO ASEP 0309520 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Comparison of photosynthetic induction and transient limitations during the induction phase in young and mature leaves from three poplar clones Title Porovnání fotosyntetické indukce a přechodových limitací během indukční fáze v mladých a dospělých listech tří klonů topolů Author(s) Urban, Otmar (UEK-B) RID, ORCID, SAI
Šprtová, Miroslava (UEK-B) RID, SAI
Košvancová, Martina (UEK-B)
Tomášková, Ivana (UEK-B)
Lichtenthaler, H.K. (DE)
Marek, Michal V. (UEK-B) RID, ORCID, SAISource Title Tree Physiology - ISSN 0829-318X
Roč. 28, č. 8 (2008), s. 1189-1197Number of pages 9 s. Language eng - English Country CA - Canada Keywords dynamic light environment ; leaf plastochron index ; photosynthetic limitations Subject RIV ED - Physiology R&D Projects GP522/05/P515 GA ČR - Czech Science Foundation (CSF) 2B06068 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z60870520 - UEK-B (2005-2011) Annotation We tested the hypothesis that leaf age affects photosynthetic induction. Photosynthetic inductions were investigated in young and mature leaves, defined by leaf plastochron index 3–5 and 10–14, from 3 poplar clones: Populus alba, nigra and euramericana. Maximum assimilation rates and stomatal conductance were higher in young leaves than in mature leaves. The clones with high photosynthetic capacity had low induction states 60s after leaf illumination (IS60), and required less time to reach 90% photosynthetic induction (T90). Young leaves exhibited a lower transient stomatal limitation than mature leaves. The time constant of Rubisco activation (τ) was significantly higher in mature leaves of P. alba; whereas there were no differences in the other clones. Our hypothesis was confirmed for transient stomatal limitation; however, for the induction parameters IS60, T90 and τ, photosynthetic induction was more clone-specific and was dependent on leaf age only in some cases. Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2009
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