Impact of elevated CO2 concentration on ultrastructure of pericarp and composition of grain in three Triticum species of different ploidy levels

Sinha, Pooja Gokhale; Kapoor, R.; Uprety, D. C.; Bhatnagar, A. K.

doi:10.1016/j.envexpbot.2009.04.006

Cited by 18 publications

(6 citation statements)

References 48 publications

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“…The average number of starch grains per cell in GOC3-6-6 was increased by 37% compared with WT ( Figure 6). The cell ultrastructure of GOC plants also looked similar to that previously reported for CO 2enriched plants (Wulff and Strain, 1982;Robertson and Leech, 1995;Wang et al, 2004;Teng et al, 2006;Pritchard et al, 2008;Sinha et al, 2009). GOC plants appeared greener as compared with WT plants by visual inspection under normal field conditions ( Figure 3A).…”

Section: Other Co 2 -Enriched Phenotypes Of Goc Plantssupporting

confidence: 84%

Engineering a New Chloroplastic Photorespiratory Bypass to Increase Photosynthetic Efficiency and Productivity in Rice

et al. 2019

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Over the past few years, three photorespiratory bypasses have been introduced into plants, two of which led to observable increases in photosynthesis and biomass yield. However, most of the experiments were carried out using Arabidopsis under controlled environmental conditions, and the increases were only observed under low-light and short-day conditions. In this study, we designed a new photorespiratory bypass (called GOC bypass), characterized by no reducing equivalents being produced during a complete oxidation of glycolate into CO 2 catalyzed by three rice-self-originating enzymes, i.e., glycolate oxidase, oxalate oxidase, and catalase. We successfully established this bypass in rice chloroplasts using a multi-gene assembly and transformation system. Transgenic rice plants carrying GOC bypass (GOC plants) showed significant increases in photosynthesis efficiency, biomass yield, and nitrogen content, as well as several other CO 2 -enriched phenotypes under both greenhouse and field conditions. Grain yield of GOC plants varied depending on seeding season and was increased significantly in the spring. We further demonstrated that GOC plants had significant advantages under high-light conditions and that the improvements in GOC plants resulted primarily from a photosynthetic CO 2 -concentrating effect rather than from improved energy balance. Taken together, our results reveal that engineering a newly designed chloroplastic photorespiratory bypass could increase photosynthetic efficiency and yield of rice plants grown in field conditions, particularly under high light.

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Section: Other Co 2 -Enriched Phenotypes Of Goc Plantssupporting

confidence: 84%

Engineering a New Chloroplastic Photorespiratory Bypass to Increase Photosynthetic Efficiency and Productivity in Rice

et al. 2019

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“…The modern wheat cultivar (Triticum aestivum) was found to be largely sink-limited. It was demonstrated that hexaploid wheat had less photosynthetic rate per unit leaf area as compared to tetraploid and diploid wheat in spite of having larger leaf size (Uprety et al, 2009). Yet another study provides evidence that tetraploid wheat responds to elevated CO 2 by increasing starch concentration and least decrease in grain protein indicating its suitability in terms of carbon (C):…”

Section: Plants Respond To Elevated [Co 2 ] By Enhanced Production Ofmentioning

confidence: 99%

Elevated CO₂Improves Growth and Phosphorus Utilization Efficiency in Cereal Species Under Sub-Optimal Phosphorus Supply

Pandey

Dubey

Ahmad

et al. 2014

Journal of Plant Nutrition

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Cultivars of Triticum aestivum, T. durum, and Secale cereale were grown at low (2 µM) and sufficient (500 µM) phosphorus (P) under ambient carbon dioxide (380 µmol mol -1 ; aCO 2 ) and elevated CO 2 (700 µmol mol -1 , eCO 2 ) to study responses of cereal species in terms of growth and P utilization efficiency (PUE) under P x CO 2 interaction. Dry matter accumulation increased under eCO 2 with sufficient P. Nevertheless, dry matter accumulated at eCO 2 with low-P was similar to that obtained at aCO 2 with sufficient P. Leaf area was 43% higher under eCO 2 with sufficient P. Significant increase in lateral root density, length and surface area were noted at low-P under eCO 2 . Phosphorus use efficience (PUE) increased by 59% in response to eCO 2 in low-P plants. Thus, eCO 2 can partly compensate effect of low-P supply because of improved utilization efficiency. Among cereals, durum wheat was more suitable in terms of PUE under high CO 2 and limiting P supply.

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“…The environmental trade-offs between yield and nutritional quality could result either from the variation in soil health or quality (nutrientdeficient soils or soils affected by salinity/alkalinity or acidity; such soil conditions lead to nutrient imbalance in the soil) and soil fertility related factors (i.e., NPK effect on seed composition) or due to drought and high temperature during the seed development. For example, reduced seed protein and minerals and altered lipid composition have been reported in barley, potato, rice, and soybean as a consequence of nitrogenous fertilizer application (Riedel 2010) or global climatic changes, especially due to high temperature and high CO 2 concentrations in the environments (H€ ogy and Fangmeier 2008;Taub and Wang 2008;Pleijel and Danielsson 2009;Sinha et al 2009;DaMatta et al 2010;Erbs et al 2010). The challenge for the agricultural research community is to minimize any possible negative trade-offs between yield and nutrient concentrations, to provide nutritious staple foods for growing populations (Davis 2009).…”

Section: F Breeding Issues Associated With Selecting Seed Mineral-dementioning

confidence: 99%

Nutritionally Enhanced Staple Food Crops

Dwivedi

Sahrawat

Kedar

et al. 2012

Plant Breeding Reviews

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Impact of elevated CO2 concentration on ultrastructure of pericarp and composition of grain in three Triticum species of different ploidy levels

Cited by 18 publications

References 48 publications

Engineering a New Chloroplastic Photorespiratory Bypass to Increase Photosynthetic Efficiency and Productivity in Rice

Engineering a New Chloroplastic Photorespiratory Bypass to Increase Photosynthetic Efficiency and Productivity in Rice

Elevated CO₂Improves Growth and Phosphorus Utilization Efficiency in Cereal Species Under Sub-Optimal Phosphorus Supply

Nutritionally Enhanced Staple Food Crops

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Impact of elevated CO2 concentration on ultrastructure of pericarp and composition of grain in three Triticum species of different ploidy levels

Cited by 18 publications

References 48 publications

Engineering a New Chloroplastic Photorespiratory Bypass to Increase Photosynthetic Efficiency and Productivity in Rice

Engineering a New Chloroplastic Photorespiratory Bypass to Increase Photosynthetic Efficiency and Productivity in Rice

Elevated CO2Improves Growth and Phosphorus Utilization Efficiency in Cereal Species Under Sub-Optimal Phosphorus Supply

Nutritionally Enhanced Staple Food Crops

Contact Info

Product

Resources

About

Elevated CO₂Improves Growth and Phosphorus Utilization Efficiency in Cereal Species Under Sub-Optimal Phosphorus Supply