Effects of elevated CO2 on growth and carbon partitioning in rice

1998 ◽  
Vol 43 (23) ◽  
pp. 1982-1986 ◽  
Author(s):  
Weihong Lin ◽  
Dali Wang
Keyword(s):  
Elevated Co2 ◽  
Carbon Partitioning

Intraspecific variation in seed yield of soybean (Glycine max) in response to increased atmospheric carbon dioxide

1998 ◽  
Vol 25 (7) ◽  
pp. 801 ◽  
Author(s):  
Lewis H. Ziska ◽  
James A. Bunce ◽  
Frances Caulfield
Keyword(s):  
Glycine Max ◽  
Elevated Co2 ◽  
Intraspecific Variation ◽  
Seed Yield ◽  
Atmospheric Carbon Dioxide ◽  
Carbon Partitioning ◽  
Relative Increase ◽  
Reproductive Capacity ◽  
Total Biomass ◽  
Single Leaf

The growth characteristics of six and the reproductive development of five soybean [Glycine max (L.) Merr.] cultivars were examined at 39 Pa (ambient) and 70 Pa (elevated) CO2 partial pressures in temperature-controlled glasshouses. Significant intraspecific variation for both growth and seed yield in response to elevated CO2 was observed among the cultivars. At elevated CO2, total biomass increased an average of 42% at the end of the vegetative stage, while average seed yield increased by only 28%. No changes in % protein or % oil were observed for any cultivar at elevated CO2, relative to ambient CO2. The relative enhancement of either vegetative or reproductive growth at elevated CO2 was not correlated with changes in the absolute or relative increase in single leaf photosynthetic rate among cultivars at elevated CO2. For soybean, the greatest response of seed yield to elevated CO2 was associated with increased production of lateral branches, increased pod production or increased seed weight, suggesting different strategies of carbon partitioning in a high CO2 environment. Data from this experiment indicates that differences in carbon partitioning among soybean cultivars may influence reproductive capacity and fecundity as atmospheric CO2 increases, with subsequent consequences for future agricultural breeding strategies.

The Response of Photosynthesis and Carbon Partitioning in Solanum tuberosum L. at Elevated CO2

1995 ◽  
pp. 4571-4574
Author(s):  
Michael D. Adcock ◽  
Andrew Brooks ◽  
Richard C. Leegood ◽  
W. Paul
Keyword(s):  
Solanum Tuberosum ◽  
Elevated Co2 ◽  
Solanum Tuberosum L ◽  
Carbon Partitioning

Does carbon partitioning in ectomycorrhizal pine seedlings under elevated CO2 vary with fungal species?

2007 ◽  
Vol 291 (1-2) ◽  
pp. 323-333 ◽  
Author(s):  
Petra M. A. Fransson ◽  
Ian C. Anderson ◽  
Ian J. Alexander
Keyword(s):  
Elevated Co2 ◽  
Carbon Partitioning ◽  
Fungal Species ◽  
Pine Seedlings

Effect of elevated CO2 on carbon partitioning in young Quercus ilex L. during resprouting

2011 ◽  
Vol 25 (11) ◽  
pp. 1527-1535 ◽  
Author(s):  
Iker Aranjuelo ◽  
Marta Pintó-Marijuan ◽  
Jean Christophe Avice ◽  
Isabel Fleck
Keyword(s):  
Elevated Co2 ◽  
Quercus Ilex ◽  
Carbon Partitioning

Will Plant Performance on Soils Prone to Drought or With High Mechanical Impedance to Root Penetration Be Improved Under Elevated Atmospheric CO2 Concentration

1992 ◽  
Vol 40 (5) ◽  
pp. 491 ◽  
Author(s):  
J Masle
Keyword(s):  
Stomatal Conductance ◽  
Elevated Co2 ◽  
Leaf Growth ◽  
Carbon Partitioning ◽  
Growth Patterns ◽  
Plant Performance ◽  
Root Penetration ◽  
Mechanical Resistance ◽  
Growth Responses ◽  
Root Cells

Plants growing on dry soils or on soils with high mechanical resistance to root penetration grow more slowly and exhibit lower stomatal conductance than those growing on moist and loose soils. In most situations in nature where edaphic stresses develop rather slowly (compared to stresses imposed in most pot experiments conducted under controlled conditions), photosynthesis is mainly reduced via stomatal effects rather than via changes in mesophyll capacity for photosynthesis. Elevated CO2 will induce an increase in the internal partial pressure of CO2, despite stomatal conductance being lowered even further. Photosynthesis will therefore be improved, and leaf turgor will be increased. It is widely thought that growth on dry or hard soils is not carbon limited because levels of soluble carbohydrates in the leaves and root cells are increased. It is shown in this paper that growth on soil with high mechanical resistance does respond to elevated CO2. However, this response is smaller than expected from the increase of carbon assimilation rate because: (a) carbon partitioning is altered so that supplementary carbohydrates are preferentially allocated to the roots; (b) leaf growth sensitivity to internal availability of sugars is lower than in plants growing on loose soils. These alterations of 'sink activity' and carbon partitioning are mediated by unknown signalling factor(s) induced in the roots. It is not known whether the root factors acting in droughted plants are of the same nature. In both droughted and impeded plants the interacting effects of these factors and of ambient CO2 levels are likely to result in improved transpiration efficiency. More experiments are needed in this area, however, especially to ascertain the relative contribution of changes in growth patterns versus changes in the patterns of water use. In conclusion, the importance of identifying the nature of the sink limitations induced by root signals is emphasised. It is a fundamental area of research to be developed not only for assessing growth responses to rising CO2 under edaphic stress, but likely also for reconciling conflicting responses of field-grown and pot-grown plants.

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