Number of the records: 1

Dynamic changes of canopy-scale mesophyll conductance to CO(2) diffusion of sunflower as affected by CO(2) concentration and abscisic acid

SYSNO ASEP	0367247
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Dynamic changes of canopy-scale mesophyll conductance to CO(2) diffusion of sunflower as affected by CO(2) concentration and abscisic acid
Author(s)	Schaufele, R. (DE) Šantrůček, Jiří (BC-A)_RID Schnyder, H. (DE)
Number of authors	3
Source Title	Plant Cell and Environment. - : Wiley - ISSN 0140-7791 Roč. 34, č. 1 (2011), s. 127-136
Number of pages	10 s.
Language	eng - English
Country	GB - United Kingdom
Keywords	carbon isotope discrimination ; water-stress ; in-vivo
Subject RIV	EF - Botanics
R&D Projects	GA206/08/0787 GA ČR - Czech Science Foundation (CSF)
CEZ	AV0Z50510513 - UMBR-M, BC-A (2005-2011)
UT WOS	000285065600010
DOI	10.1111/j.1365-3040.2010.02230.x
Annotation	Leaf-level measurements have shown that mesophyll conductance (g(m)) can vary rapidly in response to CO(2) and other environmental factors, but similar studies at the canopy-scale are missing. Here, we report the effect of short-term variation of CO(2) concentration on canopy-scale g(m) and other CO(2) exchange parameters of sunflower (Helianthus annuus L.) stands in the presence and absence of abscisic acid (ABA) in their nutrient solution. g(m) was estimated from gas exchange and on-line carbon isotope discrimination (Delta(obs)) in a 13CO(2)/12CO(2) gas exchange mesocosm. The isotopic contribution of (photo)respiration to stand-scale Delta(obs) was determined with the experimental approach of Tcherkez et al. Without ABA, short-term exposures to different CO(2) concentrations (C(a) 100 to 900 mu mol mol-1) had little effect on canopy-scale g(m).
Workplace	Biology Centre (since 2006)
Contact	Dana Hypšová, eje@eje.cz, Tel.: 387 775 214
Year of Publishing	2012

Number of the records: 1