Elevated CO2 cannot compensate for japonica grain yield losses under increasing air temperature because of the decrease in spikelet density

Wang, Weilu; Cai, Chuang; Lam, Shu Kee; Liu, Gang; Zhu, Jiang

doi:10.1016/j.eja.2018.06.005

Cited by 51 publications

(51 citation statements)

References 55 publications

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“…Our result about flowering as the threshold stage for parameterization is probably associated with changes in leaf nitrogen content around flowering. Flowering stage is important, because crop nitrogen uptake is fulfilled primarily before flowering (Cai et al, ; Shimono et al, ; Wang, Cai, Lam, Liu, & Zhu, ). Interpreting crop responses to climate change variables like elevated CO 2 has to consider plant nitrogen status (Yin, ).…”

Section: Discussionmentioning

confidence: 99%

The acclimation of leaf photosynthesis of wheat and rice to seasonal temperature changes in T‐FACE environments

Cai

et al. 2019

Global Change Biology

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Crops show considerable capacity to adjust their photosynthetic characteristics to seasonal changes in temperature. However, how photosynthesis acclimates to changes in seasonal temperature under future climate conditions has not been revealed. We measured leaf photosynthesis (An) of wheat (Triticum aestivum L.) and rice (Oryza sativa L.) grown under four combinations of two levels of CO2 (ambient and enriched up to 500 µmol/mol) and two levels of canopy temperature (ambient and increased by 1.5–2.0°C) in temperature by free‐air CO2 enrichment (T‐FACE) systems. Parameters of a biochemical C3‐photosynthesis model and of a stomatal conductance (gs) model were estimated for the four conditions and for several crop stages. Some biochemical parameters related to electron transport and most gs parameters showed acclimation to seasonal growth temperature in both crops. The acclimation response did not differ much between wheat and rice, nor among the four treatments of the T‐FACE systems, when the difference in the seasonal growth temperature was accounted for. The relationships between biochemical parameters and leaf nitrogen content were consistent across leaf ranks, developmental stages, and treatment conditions. The acclimation had a strong impact on gs model parameters: when parameter values of a particular stage were used, the model failed to correctly estimate gs values of other stages. Further analysis using the coupled gs–biochemical photosynthesis model showed that ignoring the acclimation effect did not result in critical errors in estimating leaf photosynthesis under future climate, as long as parameter values were measured or derived from data obtained before flowering.

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Section: Discussionmentioning

confidence: 99%

The acclimation of leaf photosynthesis of wheat and rice to seasonal temperature changes in T‐FACE environments

Cai

et al. 2019

Global Change Biology

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“…The method for controlling CO 2 and temperature in situ has been described in detail by Cai et al [ 31 ] and Wang et al [ 32 , 33 ]. The temperature and free-air CO 2 enrichment (T-FACE) system is characterized by six rings located within a paddy field with a similar soil and cultivation history.…”

Section: Methodsmentioning

confidence: 99%

Application of FTIR-PAS in Rapid Assessment of Rice Quality under Climate Change Conditions

Wei

2021

Foods

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Fourier transform infrared photoacoustic spectroscopy (FTIR-PAS), versus attenuated total reflectance spectroscopy (FTIR-ATR) and diffuse reflectance spectroscopy (DRIFT), was firstly applied in quick assessment of rice quality in response to rising CO2/temperature instead of conventional time-consuming chemical methods. The influences of elevated CO2 and higher temperature were identified using FTIR-PAS spectra by principal component analysis (PCA). Variations in the rice functional groups are crucial indicators for rice identification, and the ratio of the intensities of two selected spectral bands was used for correlation analysis with starch, protein, and lipid content, and the ratios all showed a positive linear correlation (R2 = 0.9103, R2 = 0.9580, and R2 = 0.9246, respectively). Subsequently, changes in nutritional components under future environmental conditions that encompass higher CO2 and temperature were evaluated, which demonstrated the potential of FTIR-PAS to detect the responses of rice to climate change, providing a valuable technique for agricultural production and food security.

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“…It is forecast that rice production will need to increase by ca 30% to meet projected population demands by 2050 (Alexandratos & Bruinsma, 2012). At present, there are a number of studies indicating considerable intraspecific variation in seed yield among rice cultivars to projected increases in CO 2 concentration (Yang et al, 2009; Wang et al, 2018, 2020; Ziska et al, 2014). For example, some studies have shown a “weak” grain yield response (12–15%) among japonica rice cultivars to an increase in CO 2 concentrations across different nitrogen applications (Kim et al, 2003a, 2003b; Yang et al, 2006); whereas other japonica/indica hybrids have demonstrated yield increases of nearly 30% at similar projected CO 2 concentrations (Yang et al, 2007, 2009; Liu et al, 2008; Hasegawa et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Leaf characteristics of rice cultivars with a stronger yield response to projected increases in CO₂ concentration

Wang

et al. 2020

Physiologia Plantarum

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Rising levels of atmospheric carbon dioxide (CO2) could, potentially, be exploited as a means to increase seed yield and maintain food security, especially for cereal grains. Although there have been multiple cultivar trials indicating that significant yield variation occurs, the basis for these differences has not been entirely elucidated. Here, we focus on two rice cultivars that differed in field trials to their yield sensitivity to elevated CO2: Yangdao6hao (YD6), and Wuyunjing23 (W23) to assess whether observed yield differences (YD6 > W23) were associated with concurrent changes in leaf‐level characteristics. At ambient levels of CO2, leaf net photosynthesis (A) of YD6 was compatible with that of W23. However, at elevated CO2, A was higher for YD6 relative to W23. The stability of leaf Rubisco content, biochemical characteristics (Vc,max, and Jmax), nitrogen enzymatic activity, and chlorophyll concentration differed significantly, with greater values observed for YD6 relative to W23 at elevated CO2. While such results are consistent with other studies, we also demonstrate that a higher ratio of carbon sinks (seed) to carbon sources (leaf), were linked to increases in cytokinins, and slower flag leaf senescence for the YD6 relative to the W23 cultivar at elevated CO2. While additional data for a broader genetic selection are needed, the current study suggests a link between source/sink carbon assimilation, maintenance of photosynthetic biochemistry, and slower leaf senescence for rice cultivars that show a stronger yield response to projected CO2 levels. This information, in turn, may provide suitable metrics for future CO2 selection among rice cultivars.

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Elevated CO2 cannot compensate for japonica grain yield losses under increasing air temperature because of the decrease in spikelet density

Cited by 51 publications

References 55 publications

The acclimation of leaf photosynthesis of wheat and rice to seasonal temperature changes in T‐FACE environments

The acclimation of leaf photosynthesis of wheat and rice to seasonal temperature changes in T‐FACE environments

Application of FTIR-PAS in Rapid Assessment of Rice Quality under Climate Change Conditions

Leaf characteristics of rice cultivars with a stronger yield response to projected increases in CO₂ concentration

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Elevated CO2 cannot compensate for japonica grain yield losses under increasing air temperature because of the decrease in spikelet density

Cited by 51 publications

References 55 publications

The acclimation of leaf photosynthesis of wheat and rice to seasonal temperature changes in T‐FACE environments

The acclimation of leaf photosynthesis of wheat and rice to seasonal temperature changes in T‐FACE environments

Application of FTIR-PAS in Rapid Assessment of Rice Quality under Climate Change Conditions

Leaf characteristics of rice cultivars with a stronger yield response to projected increases in CO2 concentration

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Leaf characteristics of rice cultivars with a stronger yield response to projected increases in CO₂ concentration