Effects of Elevated CO<sub>2</sub>Concentration on Photosynthetic Carbon Metabolism in Flag-Leaf Blades of Rice before and after Heading

Aoki, Naohiro; Ono, Kiyomi; Sasaki, Hidetada; Seneweera, Saman; Sakai, Hidemitsu; Kobayashi, Kazuhiko; Ishimaru, Ken

doi:10.1626/pps.6.52

Cited by 13 publications

(5 citation statements)

References 27 publications

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“…Studies on different rice cultivars have revealed that elevated CO 2 usually has little effect on photosynthesis, chlorophyll content, leaf area, and genes expression at the heading stage. 44 al. examined the effects of elevated CO 2 on the partitioning and translocation of photosynthate in rice at different stages and found that CO 2 enrichment stimulated the partitioning of carbohydrate to panicles during the vegetative and grain-filling period.…”

Section: ■ Resultsmentioning

confidence: 99%

“…The results presented here are in line with earlier observations from FACE experiments and other similar studies. Studies on different rice cultivars have revealed that elevated CO 2 usually has little effect on photosynthesis, chlorophyll content, leaf area, and genes expression at the heading stage. − Sasaki et al examined the effects of elevated CO 2 on the partitioning and translocation of photosynthate in rice at different stages and found that CO 2 enrichment stimulated the partitioning of carbohydrate to panicles during the vegetative and grain-filling period . It is thought that elevated CO 2 concentrations decrease photorespiration and initially enhance photosynthesis and growth in most C3 plants.…”

Section: Discussionmentioning

confidence: 99%

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Transcriptome Reveals the Rice Response to Elevated Free Air CO₂ Concentration and TiO₂ Nanoparticles

Zhu

et al. 2019

Environ. Sci. Technol.

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Increasing CO2 levels are speculated to change the effects of engineered nanomaterials in soil and on plant growth. How plants will respond to a combination of elevated CO2 and nanomaterials stress has rarely been investigated, and the underlying mechanism remains largely unknown. Here, we conducted a field experiment to investigate the rice (Oryza sativa L. cv. IIyou) response to TiO2 nanoparticles (nano-TiO2, 0 and 200 mg kg–1) using a free-air CO2 enrichment system with different CO2 levels (ambient ∼370 μmol mol–1 and elevated ∼570 μmol mol–1). The results showed that elevated CO2 or nano-TiO2 alone did not significantly affect rice chlorophyll content and antioxidant enzyme activities. However, in the presence of nano-TiO2, elevated CO2 significantly enhanced the rice height, shoot biomass, and panicle biomass (by 9.4%, 12.8%, and 15.8%, respectively). Furthermore, the Kyoto Encyclopedia of Genes and Genomes pathway enrichment analysis revealed that genes involved in photosynthesis were up-regulated while most genes associated with secondary metabolite biosynthesis were down-regulated in combination-treated rice. This indicated that elevated CO2 and nano-TiO2 might stimulate rice growth by adjusting resource allocation between photosynthesis and metabolism. This study provides novel insights into rice responses to increasing contamination under climate change.

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Section: ■ Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Transcriptome Reveals the Rice Response to Elevated Free Air CO₂ Concentration and TiO₂ Nanoparticles

Zhu

et al. 2019

Environ. Sci. Technol.

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“…In the previous study, the flag leaves in the reproductive stage of the plants grown in soil culture were used (Ono et al, 1999), but in this study, we used the uppermost fully expanded leaves in the vegetative stage of the plants grown hydroponically. Our group proposed that the effects of elevated [C0 2 ] on carbon metabolism might vary depending on the growth stage in rice plants (Aoki et al, 2003) and the growth condition mainly determines the characters of plants. Probably, the differences in growth condition and/ or stage might cause the difference in results between this and previous study.…”

Section: Discussionmentioning

confidence: 99%

Changes in Photosynthetic Activity and Export of Carbon by Overexpressing a Maize Sucrose-Phosphate Synthase Gene under Elevated C0₂in Transgenic Rice

Ono

Sasaki

Hara

et al. 2003

Plant Production Science

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“…A concomitant reduction in the transcript level of genes encoding proteins involved in photosynthesis, including small subunit of Rubisco ( RbcS ), large subunit of Rubisco ( RbcL ), and Rubisco activase ( Rca ), has been observed in different plants ( Nie et al, 1995 ; Cheng et al, 1998 ; Moore et al, 1998 , 1999 ; Stitt and Krapp, 1999 ). In contrast, in expanding rice leaf blades there was no significant difference in RbcS transcript level between ambient and elevated CO 2 levels ( Aoki et al, 2003 ). This can be correlated with changes in Rubisco concentration during leaf development, with a rapid increase in Rubisco protein during leaf expansion, reaching a maximum when the leaf is fully expanded and a gradual decline with the onset of leaf senescence ( Seneweera and Conroy, 2005 ; Imai et al, 2008 ).…”

Section: Impacts Of Elevated Comentioning

confidence: 99%

Improving yield potential in crops under elevated CO2: Integrating the photosynthetic and nitrogen utilization efficiencies

Kant¹,

Seneweera²,

Rodin³

et al. 2012

Front. Plant Sci.

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114

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Increasing crop productivity to meet burgeoning human food demand is challenging under changing environmental conditions. Since industrial revolution atmospheric CO2 levels have linearly increased. Developing crop varieties with increased utilization of CO2 for photosynthesis is an urgent requirement to cope with the irreversible rise of atmospheric CO2 and achieve higher food production. The primary effects of elevated CO2 levels in most crop plants, particularly C3 plants, include increased biomass accumulation, although initial stimulation of net photosynthesis rate is only temporal and plants fail to sustain the maximal stimulation, a phenomenon known as photosynthesis acclimation. Despite this acclimation, grain yield is known to marginally increase under elevated CO2. The yield potential of C3 crops is limited by their capacity to exploit sufficient carbon. The “C fertilization” through elevated CO2 levels could potentially be used for substantial yield increase. Rubisco is the rate-limiting enzyme in photosynthesis and its activity is largely affected by atmospheric CO2 and nitrogen availability. In addition, maintenance of the C/N ratio is pivotal for various growth and development processes in plants governing yield and seed quality. For maximizing the benefits of elevated CO2, raising plant nitrogen pools will be necessary as part of maintaining an optimal C/N balance. In this review, we discuss potential causes for the stagnation in yield increases under elevated CO2 levels and explore possibilities to overcome this limitation by improved photosynthetic capacity and enhanced nitrogen use efficiency. Opportunities of engineering nitrogen uptake, assimilatory, and responsive genes are also discussed that could ensure optimal nitrogen allocation toward expanding source and sink tissues. This might avert photosynthetic acclimation partially or completely and drive for improved crop production under elevated CO2 levels.

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Effects of Elevated CO₂Concentration on Photosynthetic Carbon Metabolism in Flag-Leaf Blades of Rice before and after Heading

Cited by 13 publications

References 27 publications

Transcriptome Reveals the Rice Response to Elevated Free Air CO₂ Concentration and TiO₂ Nanoparticles

Transcriptome Reveals the Rice Response to Elevated Free Air CO₂ Concentration and TiO₂ Nanoparticles

Changes in Photosynthetic Activity and Export of Carbon by Overexpressing a Maize Sucrose-Phosphate Synthase Gene under Elevated C0₂in Transgenic Rice

Improving yield potential in crops under elevated CO2: Integrating the photosynthetic and nitrogen utilization efficiencies

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Effects of Elevated CO2Concentration on Photosynthetic Carbon Metabolism in Flag-Leaf Blades of Rice before and after Heading

Cited by 13 publications

References 27 publications

Transcriptome Reveals the Rice Response to Elevated Free Air CO2 Concentration and TiO2 Nanoparticles

Transcriptome Reveals the Rice Response to Elevated Free Air CO2 Concentration and TiO2 Nanoparticles

Changes in Photosynthetic Activity and Export of Carbon by Overexpressing a Maize Sucrose-Phosphate Synthase Gene under Elevated C02in Transgenic Rice

Improving yield potential in crops under elevated CO2: Integrating the photosynthetic and nitrogen utilization efficiencies

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Product

Resources

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Effects of Elevated CO₂Concentration on Photosynthetic Carbon Metabolism in Flag-Leaf Blades of Rice before and after Heading

Transcriptome Reveals the Rice Response to Elevated Free Air CO₂ Concentration and TiO₂ Nanoparticles

Transcriptome Reveals the Rice Response to Elevated Free Air CO₂ Concentration and TiO₂ Nanoparticles

Changes in Photosynthetic Activity and Export of Carbon by Overexpressing a Maize Sucrose-Phosphate Synthase Gene under Elevated C0₂in Transgenic Rice