Growth and Genome-wide Association Analyses of 100 Field-grown Barley Genotypes Exposed to Future CO2 Concentrations

Mitterbauer, Esther; Bender, Jürgen; Erbs, Martin; Habekuß, Antje; Ordon, Frank; Weigel, Hans‐Joachim

doi:10.1016/j.proenv.2015.07.256

Cited by 4 publications

(1 citation statement)

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“…Seneweera et al (2010) evaluated eight wheat cultivars in the Australian Grains Free Air Carbon Dioxide Enrichment (AGFACE) facility and showed that the largest (by 30%) and smallest (4%) relative increases in dry mass due to CO2 enrichment (550 vs 380 µmol mol -1 ) were observed in the 'Gladius' and 'Janz' cultivars, respectively. Mitterbauer et al (2014) reported significant differences in the responses to elevated CO2 (~700 vs ~400 µmol mol -1 ) among 101 barely genotypes grown in open-top field chambers. In their experiment, the changes in grain yield ranged from -48 to +175% and those in the aboveground biomass varied from +45 to +166%.…”

Section: Methodsmentioning

confidence: 95%

Differential Growth Responses of Wheat Seedlings to Elevated CO2

2018

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Intraspecific variations in wheat growth responses to elevated CO2 was evaluated using 20 Iranian bread wheat (Triticum aestivum L.) cultivars. The plants were grown in the modified Hoagland nutrient solution at a greenhouse until 35 days of age using two levels of CO2 (~380 and 700 µmol mol–1). The shoot and root dry weights of the wheat cultivars exhibited average enhancements of 17% and 36%, respectively, under elevated CO2. This increase was associated with higher levels of chlorophyll a (25%), chlorophyll b (21%), carotenoid (30%), leaf area (54%) and plant height (49.9%). The leaf area (r = 0.69**), shoot N content (r = 0.62**), plant height (r = 0.60**) and root volume (r = 0.53*) were found to have important roles in dry matter accumulation of tested wheat cultivars under elevated CO2 concentration. However, responses to elevated CO2 were considerably cultivar-dependent. Based on the stress susceptibility index (SSI) and stress tolerance index (STI), the wheat cultivars exhibiting the best response to elevated CO2 content were ‘Sistan’, ‘Navid’, ‘Shiraz’, ‘Sepahan’ and ‘Bahar’, while the ones with poor responses were ‘Omid’, ‘Marun’, ‘Sorkhtokhm’ and ‘Tajan’. The findings from the present experiment showed significant variation among the Iranian wheat cultivars in terms of their responses to elevated air CO2, providing the opportunity to select the most efficient ones for breeding purposes.

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Section: Methodsmentioning

confidence: 95%