Effects of elevated atmospheric CO2 on physiology and yield of wheat (Triticum aestivum L.): A meta-analytic test of current hypotheses

The optimal atmospheric CO2 concentration for the growth of winter wheat (Triticum aestivum)

“…These rates are greater than the average of 32% of greenhouse and open-top chamber (OTC) studies (Curtis and Wang, 1998), 20% of a meta-analysis of FACE experiments for C3 plants , and 28% of a most recent review on wheat (Wang et al, 2013). My current results are close to the theoretical projection based on Rubisco's properties .…”

“…The CO 2 -induced reduction in stomatal conductance results in the decrease in transpiration and thus increases leaf temperature and reduces nutrient availability. Many studies have found that elevated CO 2 concentration has increased plant C/N ratio and decreased the protein concentration in wheat grains (Ma et al, 2007;Sinha et al, 2009;Wang et al, 2013). The CO 2 fertilization effect on plant growth may confound with other factors, such as temperature, water availability, ozone concentration, and nitrogen deposition, which may reduce or even cancel out the CO 2 fertilization effect (Fiscus et al, 2002;Yu et al, 2012;Mishra et al, 2013;Aljazairi and Nogues, 2015).…”

“…The up-regulation of photosynthesis is mainly attributed to the enhanced carboxylation in the Calvin-Benson-Bassham cycle and reduced photorespiration under higher CO 2 concentration (Andrews and Lorimer, 1987;Aranjuelo et al, 2005), while the down-regulation is caused by various limiting factors, such as lower nitrogen availability (Pettersson and McDonald, 1994;Sage, 1994;Stitt and Krapp, 1999;Nebauer et al, 2011), reduced stomatal conductance (g s ) (Field et al, 1995;Hamerlynck et al, 2000;Erice et al, 2006;Leakey et al, 2006;Wang et al, 2013), and excessive carbohydrate accumulation in leaves (Stitt et al, 1991;Gunderson and Wullschleger, 1994;Ainsworth et al, 2004). In the current study the plants were fertilized and thus the nitrogen limitation was unlikely.…”

Expression patterns of C- and N-metabolism related genes in wheat are changed during senescence under elevated CO2 in dry-land agriculture

“…1d, also [22,64] and increased expression of TaNR1 is consistent with these changes). Significant decreases in shoot (leaf) N concentration under elevated [CO 2 ] have been reported in many studies [69].…”

Atmospheric CO2 fertilization effects on biomass yields of 10 crops in northern Germany

“…A similar study by Kersebaum and Nendel (2014), also for winter wheat and varying sites in Germany, using the same climate model and scenario as the presented study, reported yield decreases by -11.6% if the effect was neglected and depending on the algorithm (three tested in total), 0.9 to 6.0% yield increases if the [CO 2 ] effect was included. Apart from this, several articles exist that deal with [CO 2 ] and crop yields on different scales and approaches (Ziska and Bunce, 2007;Högy and Fangmeier, 2008;Soussana et al, 2010;Vanuytrecht et al, 2011;Weigel and Manderscheid, 2012;Tausz et al, 2013;Wang et al, 2013).…”