Interactive effects of elevated atmospheric CO2 concentrations and plant available soil water content on canopy evapotranspiration and conductance of spring wheat

Burkart, Stefan; Manderscheid, Remigius; Weigel, Hans‐Joachim

doi:10.1016/j.eja.2004.07.003

Cited by 35 publications

(32 citation statements)

References 43 publications

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“…20%) and also seasonal water use by 14% (Burkart et al, 2004). However, drought stress was initiated shortly after canopy closure and before this stage soil water content is also strongly influenced by evaporation.…”

Section: Radiation Absorption By the Green Canopymentioning

confidence: 99%

“…L water per m 2 soil area. Rooting depth was assumed to be 0.4 m (1998) and 0.5 m (1999), respectively, based on root growth measurements, and the seasonal course of available water in both years has been shown by Burkart et al (2004). Initially, different soil types were selected in order to have a soil with a low (cambisol) and a high amount of plant-available water (chernosem).…”

Section: Experimental Design and Treatment Factorsmentioning

confidence: 99%

“…Soil moisture was measured by time domain reflectrometry sensors at one (1998) depth (0.20-0.36 meters) or four (1999) depths (ranging from 0.1-0.9 meters). Plant-available soil water content was calculated as the product of the soil rooting depth and the sensor readings after subtracting the soil water content at the permanent wilting point (Burkart et al, 2004) and is given in mm, i.e. L water per m 2 soil area.…”

Section: Experimental Design and Treatment Factorsmentioning

confidence: 99%

“…Radiation-use efficiency of aboveground biomass production was calculated as the slope of the regression of aboveground biomass versus cumulative photosynthetically active radiation absorbed by the green canopy starting after the first destructive harvest. Wateruse efficiency was calculated from the values for total aboveground biomass at grain maturity, and the seasonal water consumption is described in Burkart et al (2004).…”

Section: Analysis Of Plant Growthmentioning

confidence: 99%

“…In a previous paper (Burkart et al, 2004), it has been shown that CO 2 enrichment decreased canopy evapotranspiration under well-watered conditions, while under drought stress, canopy water flux was unaffected or even increased due to a stimulation of root growth in the deeper soil layers. The objective of the present study was to examine the effects of CO 2 and water supply on radiation absorption by evaluating green leaf and stem area growth and senescence, on the radiation-use efficiency of aboveground biomass production and on grain yield of wheat.…”

Section: Introductionmentioning

confidence: 99%

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Drought stress effects on wheat are mitigated by atmospheric CO2 enrichment

Manderscheid¹,

Weigel²

2007

Agron. Sustain. Dev.

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-The atmospheric CO 2 concentration is predicted to increase and to generate a rise in the global surface temperature, and change the seasonal precipitation pattern. This could aggravate the severity of summer drought conditions and affect crop yield. We studied the effect of the interaction of CO 2 and water supply on seasonal absorption of photosynthetically active radiation and radiation-use efficiency of aboveground biomass production to understand the processes contributing to final yield. Wheat was grown over two years in open-top chambers at present or future (+280 ppmv) atmospheric CO 2 concentration and under sufficient water supply or drought stress in lysimeters with a soil depth of 0.4 m (first year) or in the field with unrestricted root growth (second year). Drought stress was started after the first node stage by halving the water supply. Our results show that under sufficient watering, CO 2 enrichment did not affect the green area index or seasonal radiation absorption. Drought stress always decreased the green area index and accelerated canopy senescence, which in the second year resulted in a decrease of 23% in the seasonal radiation absorption under the present atmospheric CO 2 concentration. CO 2 enrichment stimulated the green area index under drought stress in the second year and seasonal radiation absorption was only decreased by 16%. Radiation-use efficiency was reduced by drought and increased by CO 2 elevation and the CO 2 effect was higher under restricted (+60%) than under sufficient watering (+32%). This implies that CO 2 enrichment enhanced final biomass and grain yield by less than 10% under well-watered conditions and by more than 44% under drought stress conditions, respectively. This study indicates that the increase in atmospheric CO 2 concentration will attenuate the effects of summer drought on wheat grain yield.CO 2 enrichment / drought / leaf area index / radiation absorption / radiation-use efficiency / water-use efficiency / wheat

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Section: Radiation Absorption By the Green Canopymentioning

confidence: 99%

Section: Experimental Design and Treatment Factorsmentioning

confidence: 99%

Section: Experimental Design and Treatment Factorsmentioning

confidence: 99%

Section: Analysis Of Plant Growthmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Drought stress effects on wheat are mitigated by atmospheric CO2 enrichment

Manderscheid¹,

Weigel²

2007

Agron. Sustain. Dev.

Self Cite

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Effect of drought and carbon dioxide on nutrient uptake and levels of nutrient‐uptake proteins in roots of barley

Bista

Heckathorn

Jayawardena

et al. 2020

American J of Botany

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Atmospheric carbon dioxide (CO 2) concentration is increasing, as is the frequency and duration of drought in some regions. Elevated CO 2 can decrease the effects of drought by further decreasing stomatal opening and, hence, water loss from leaves. Both elevated CO 2 and drought typically decrease plant nutrient concentration, but their interactive effects on nutrient status and uptake are little studied. We investigated whether elevated CO 2 helps negate the decrease in plant nutrient status during drought by upregulating nutrient-uptake proteins in roots. METHODS: Barley (Hordeum vulgare) was subjected to current vs. elevated CO 2 (400 or 700 ppm) and drought vs. well-watered conditions, after which we measured biomass, tissue nitrogen (N) and phosphorus (P) concentrations (%N and P), N-and P-uptake rates, and the concentration of the major N-and P-uptake proteins in roots. RESULTS: Elevated CO 2 decreased the impact of drought on biomass. In contrast, both drought and elevated CO 2 decreased %N and %P in most cases, and their effects were additive for shoots. Root N-and P-uptake rates were strongly decreased by drought, but were not significantly affected by CO 2. Averaged across treatments, both drought and high CO 2 resulted in upregulation of NRT1 (NO 3 − transporter) and AMT1 (NH 4 + transporter) per unit total root protein, while only drought increased PHT1 (P transporter). CONCLUSIONS: Elevated CO 2 exacerbated decreases in %N and %P, and hence food quality, during drought, despite increases in the concentration of nutrient-uptake proteins in roots, indicating other limitations to nutrient uptake.

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Changes in stomatal conductance and net photosynthesis during phenological development in spring wheat: implications for gas exchange modelling

Uddling

Pleijel

2006

Int J Biometeorol

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Gas exchange was measured from 1 month before the onset of anthesis until the end of grain filling in field-grown spring wheat, Triticum aestivum L., cv. Vinjett, in southern Sweden. Two g ( s ) models were parameterised using these data: one Jarvis-type multiplicative g ( s ) model (J-model), and one combined stomatal-photosynthesis model (L-model). In addition, the multiplicative g ( s ) model parameterisation for wheat used within the European Monitoring and Evaluation Programme (EMEP-model) was tested and evaluated. The J-model performed well (R (2)=0.77), with no systematic pattern of the residuals plotted against the driving variables. The L-model explained a larger proportion of the variation in g ( s ) data when observations of A (n) were used as input data (R (2)=0.71) compared to when A (n) was modelled (R (2)=0.53). In both cases there was a systematic model failure, with g (s) being over- and underestimated before and after anthesis, respectively. This pattern was caused by the non-parallel changes in g ( s ) and A (n) during plant phenological development, with A (n) both peaking and starting to decline earlier as compared to g ( s ). The EMEP-model accounted for 41% of the variation in g ( s ) data, with g ( s ) being underestimated after anthesis. We conclude that, under the climatic conditions prevailing in southern Scandinavia, the performance of the combined stomatal-photosynthesis approach is hampered by the non-parallel changes in g ( s ) and A (n), and that the phenology function of the EMEP-model, having a sharp local maximum at anthesis, should be replaced by a function with a broad non-limiting period after anthesis.

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Interactive effects of elevated atmospheric CO2 concentrations and plant available soil water content on canopy evapotranspiration and conductance of spring wheat

Cited by 35 publications

References 43 publications

Drought stress effects on wheat are mitigated by atmospheric CO2 enrichment

Drought stress effects on wheat are mitigated by atmospheric CO2 enrichment

Effect of drought and carbon dioxide on nutrient uptake and levels of nutrient‐uptake proteins in roots of barley

Changes in stomatal conductance and net photosynthesis during phenological development in spring wheat: implications for gas exchange modelling

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