scholarly journals Toward improved drought tolerance in bioenergy crops: QTL for carbon isotope composition and stomatal conductance inPopulus

2013 ◽  
Vol 2 (3) ◽  
pp. 220-236 ◽  
Author(s):  
Maud Viger ◽  
Maricela Rodriguez-Acosta ◽  
Anne M. Rae ◽  
James I. L. Morison ◽  
Gail Taylor
Keyword(s):  
Stomatal Conductance ◽  
Drought Tolerance ◽  
Carbon Isotope ◽  
Isotope Composition ◽  
Carbon Isotope Composition ◽  
Bioenergy Crops

Carbon Isotope Discrimination measured Concurrently with Gas Exchange to Investigate CO2 Diffusion in Leaves of Higher Plants

1986 ◽  
Vol 13 (2) ◽  
pp. 281 ◽  
Author(s):  
JR Evans ◽  
TD Sharkey ◽  
JA Berry ◽  
GD Farquhar
Keyword(s):  
Stomatal Conductance ◽  
Gas Exchange ◽  
Carbon Isotope ◽  
Higher Plants ◽  
Isotope Composition ◽  
Co2 Assimilation ◽  
Carbon Isotope Composition ◽  
C3 Plants ◽  
Isotopic Discrimination ◽  
Co2 Diffusion

Conventional gas-exchange techniques that measure the stomatal conductance and rate of CO2 assimilation of leaves were combined with measurements of the carbon isotope composition of CO2 in air passing over a leaf. Isotopic discrimination during uptake was determined from the difference in the carbon isotope composition of air entering and leaving the leaf chamber. Isotopic discrimination measured over the short term correlated strongly with that determined from combusted leaf material. Environmental conditions were manipulated to alter the relative influences of stomatal conductance and carboxylation on the discrimination of carbon isotopes by intact leaves. With C3 plants, discrimination increased as the gradient in partial pressure of CO2 across the stomata decreased. For C4 plants there was little change in discrimination despite substantial changes in the diffusion gradient across the sto- mata. These results are consistent with, and provide the first direct experimental support for, theoretical equations describing discrimination during photosynthesis. Despite uncertainties about various processes affecting carbon isotope composition, the resistance to the transfer of CO2 from the intercellular airspaces to the sites of carboxylation in the mesophyll chloroplasts was estimated using this technique. For wheat the estimated resistance was 1.2-2.4 m2 s bar mol -1.

Changes in foliar carbon isotope composition and seasonal stomatal conductance reveal adaptive traits in Mediterranean coppices affected by drought

2014 ◽  
Vol 25 (4) ◽  
pp. 839-845 ◽  
Author(s):  
Giovanni Di Matteo ◽  
Luigi Perini ◽  
Paolo Atzori ◽  
Paolo De Angelis ◽  
Tiziano Mei ◽  
...  
Keyword(s):  
Stomatal Conductance ◽  
Carbon Isotope ◽  
Isotope Composition ◽  
Carbon Isotope Composition ◽  
Adaptive Traits

The influence of hydrodynamics on the carbon isotope composition of inorganically precipitated calcite

2021 ◽  
Vol 565 ◽  
pp. 116932
Author(s):  
Hao Yan ◽  
Wolfgang Dreybrodt ◽  
Huiming Bao ◽  
Yongbo Peng ◽  
Yu Wei ◽  
...  
Keyword(s):  
Carbon Isotope ◽  
Isotope Composition ◽  
Carbon Isotope Composition
Sign in / Sign up

Export Citation Format

Share Document