Nitrogen application is required to realize wheat yield stimulation by elevated CO<sub>2</sub> but will not remove the CO<sub>2</sub>‐induced reduction in grain protein concentration

Pleijel, Håkan; Broberg, Malin; Högy, Petra; Uddling, Johan

doi:10.1111/gcb.14586

Cited by 38 publications

(26 citation statements)

References 48 publications

(75 reference statements)

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“…Cadenza and Skyfall plants in our experiments, although not in Avalon (Figure 3a,b). The phenomenon of reduced N content of arable crops has potentially serious implications for the nutritional quality of grain and grain-based food products (Pleijel & Uddling, 2012 (Pleijel, Broberg, Hogy, & Uddling, 2019).…”

Section: Cultivar-specific Wheat Nutrient Gains Via Mycorrhizasmentioning

confidence: 99%

Carbon for nutrient exchange between arbuscular mycorrhizal fungi and wheat varies according to cultivar and changes in atmospheric carbon dioxide concentration

Thirkell

Pastok

Field

2019

Global Change Biology

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Arbuscular mycorrhizal fungi (AMF) form symbioses with most crops, potentially improving their nutrient assimilation and growth. The effects of cultivar and atmospheric CO2 concentration ([CO2]) on wheat–AMF carbon‐for‐nutrient exchange remain critical knowledge gaps in the exploitation of AMF for future sustainable agricultural practices within the context of global climate change. We used stable and radioisotope tracers (15N, 33P, 14C) to quantify AMF‐mediated nutrient uptake and fungal acquisition of plant carbon in three wheat (Triticum aestivum L.) cultivars. We grew plants under current ambient (440 ppm) and projected future atmospheric CO2 concentrations (800 ppm). We found significant 15N transfer from fungus to plant in all cultivars, and cultivar‐specific differences in total N content. There was a trend for reduced N uptake under elevated atmospheric [CO2]. Similarly, 33P uptake via AMF was affected by cultivar and atmospheric [CO2]. Total P uptake varied significantly among wheat cultivars and was greater at the future than current atmospheric [CO2]. We found limited evidence of cultivar or atmospheric [CO2] effects on plant‐fixed carbon transfer to the mycorrhizal fungi. Our results suggest that AMF will continue to provide a route for nutrient uptake by wheat in the future, despite predicted rises in atmospheric [CO2]. Consideration should therefore be paid to cultivar‐specific AMF receptivity and function in the development of climate smart germplasm for the future.

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Section: Cultivar-specific Wheat Nutrient Gains Via Mycorrhizasmentioning

confidence: 99%

Carbon for nutrient exchange between arbuscular mycorrhizal fungi and wheat varies according to cultivar and changes in atmospheric carbon dioxide concentration

Thirkell

Pastok

Field

2019

Global Change Biology

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“…In contrast to the homogenous rise in CO 2 , the impact from these stress factors will vary substantially both at a geographical and temporal scale, making projections for future crops yields rather complex. The eCO 2 stimulation of wheat yield is also dependent on N fertilization, where application rates up to 200 kg ha −1 promotes the eCO 2 response [55].…”

Section: Implications For Modelling and Food Security Assessmentmentioning

confidence: 99%

Effects of Elevated CO2 on Wheat Yield: Non-Linear Response and Relation to Site Productivity

et al. 2019

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Elevated carbon dioxide (eCO2) is well known to stimulate plant photosynthesis and growth. Elevated carbon dioxide’s effects on crop yields are of particular interest due to concerns for future food security. We compiled experimental data where field-grown wheat (Triticum aestivum Linnaeus) was exposed to different CO2 concentrations. Yield and yield components were analyzed by meta-analysis to estimate average effects, and response functions derived to assess effect size in relation to CO2 concentration. Grain yield increased by 26% under eCO2 (average ambient concentration of 372 ppm and elevated 605 ppm), mainly due to the increase in grain number. The response function for grain yield with CO2 concentration strongly suggests a non-linear response, where yield stimulation levels off at ~600 ppm. This was supported by the meta-analysis, which did not indicate any significant difference in yield stimulation in wheat grown at 456–600 ppm compared to 601–750 ppm. Yield response to eCO2 was independent of fumigation technique and rooting environment, but clearly related to site productivity, where relative CO2 yield stimulation was stronger in low productive systems. The non-linear yield response, saturating at a relatively modest elevation of CO2, was of large importance for crop modelling and assessments of future food production under rising CO2.

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“…In our study, 15.9% increase in carbon and nitrogen ratio was observed under e CO 2 conditions. It is well known that when plants are grown under e CO 2 condition, they display increased rates of photosynthesis as well as lower N levels in leaves due to increased plant growth rates 45 .…”

Section: Discussionmentioning

confidence: 99%

Effects of elevated CO2 on resistant and susceptible rice cultivar and its primary host, brown planthopper (BPH), Nilaparvata lugens (Stål)

Senthil‐Nathan

2021

Sci Rep

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The elevated CO2 (eCO2) has positive response on plant growth and negative response on insect pests. As a contemplation, the feeding pattern of the brown plant hopper, Nilaparvata lugens Stål on susceptible and resistant rice cultivars and their growth rates exposed to eCO2 conditions were analyzed. The eCO2 treatment showed significant differences in percentage of emergence and rice biomass that were consistent across the rice cultivars, when compared to the ambient conditions. Similarly, increase in carbon and decrese in nitrogen ratio of leaves and alterations in defensive peroxidase enzyme levels were observed, but was non-linear among the cultivars tested. Lower survivorship and nutritional indices of N. lugens were observed in conditions of eCO2 levels over ambient conditions. Results were nonlinear in manner. We conclude that the plant carbon accumulation increased due to eCO2, causing physiological changes that decreased nitrogen content. Similarly, eCO2 increased insect feeding, and did alter other variables such as their biology or reproduction.

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Nitrogen application is required to realize wheat yield stimulation by elevated CO₂ but will not remove the CO₂‐induced reduction in grain protein concentration

Cited by 38 publications

References 48 publications

Carbon for nutrient exchange between arbuscular mycorrhizal fungi and wheat varies according to cultivar and changes in atmospheric carbon dioxide concentration

Carbon for nutrient exchange between arbuscular mycorrhizal fungi and wheat varies according to cultivar and changes in atmospheric carbon dioxide concentration

Effects of Elevated CO2 on Wheat Yield: Non-Linear Response and Relation to Site Productivity

Effects of elevated CO2 on resistant and susceptible rice cultivar and its primary host, brown planthopper (BPH), Nilaparvata lugens (Stål)

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Nitrogen application is required to realize wheat yield stimulation by elevated CO2 but will not remove the CO2‐induced reduction in grain protein concentration

Cited by 38 publications

References 48 publications

Carbon for nutrient exchange between arbuscular mycorrhizal fungi and wheat varies according to cultivar and changes in atmospheric carbon dioxide concentration

Carbon for nutrient exchange between arbuscular mycorrhizal fungi and wheat varies according to cultivar and changes in atmospheric carbon dioxide concentration

Effects of Elevated CO2 on Wheat Yield: Non-Linear Response and Relation to Site Productivity

Effects of elevated CO2 on resistant and susceptible rice cultivar and its primary host, brown planthopper (BPH), Nilaparvata lugens (Stål)

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Nitrogen application is required to realize wheat yield stimulation by elevated CO₂ but will not remove the CO₂‐induced reduction in grain protein concentration