NDLI: Effect of Elevated CO$_{2}$ on Photosynthesis and Chlorophyll Fluorescence of Rose Plants Grown at High Temperature and High Photosynthetic Photon Flux Density

Content Provider	Springer Nature Link
Author	Urban, L. Barthélémy, L. Bearez, P. Pyrrha, P.
Copyright Year	2001
Abstract	Gas exchange and chlorophyll (Chl) fluorescence were measured on young mature leaves of rose plants (Rosa hybrida cvs. First Red and Twingo) grown in two near-to-tight greenhouses, one under control ambient CO$_{2}$ concentration, AC (355 µmol mol$^{−1}$) and one under CO$_{2}$ enrichment, EC (700 µmol mol$^{−1}$), during four flushes from late June to early November. Supply of water and mineral elements was non-limiting while temperature was allowed to rise freely during daytime. Leaf diffusive conductance was not significantly reduced at EC but net photosynthetic rate increased by more than 100 %. Although the concentration of total non-structural saccharides was substantially higher in the leaves from the greenhouse with EC, Φ$_{PS2}$ (quantum efficiency of radiation use) around noon was not significantly reduced at EC indicating that there was no down-regulation of electron transport. Moreover, CO$_{2}$ enrichment did not cause any increase in the risk of photo-damage, as estimated by the 1 − q$_{P}$ parameter. Non-photochemical quenching was even higher in the greenhouse with EC during the two summer flushes, when temperature and photosynthetic photon flux density (PPFD) were the highest. Hence rose photosynthesis benefits strongly from high concentrations of atmospheric CO$_{2}$ at both high and moderate temperatures and PPFD.
Starting Page	275
Ending Page	281
Page Count	7
File Format	PDF
ISSN	03003604
Journal	Photosynthetica
Volume Number	39
Issue Number	2
e-ISSN	15739058
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2001-01-01
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Plant Physiology
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science

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