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Table of contents
CHAPTER I Relationship between 13C discrimination and leaf gas exchange: Analysis of the model, influence of the parameters and implications for estimating mesophyll conductance to CO2.
INTRODUCTION
Diversity of the Wi-Δ13C relationships found in the literature
Using the complete form of the discrimination model
On the importance of the b parameter
Importance of non-photorespiratory decarboxylation: e and Rd
Importance of photorespiration: f and Γ*
Concluding remarks
CHAPTER II Mesophyll conductance to CO2, assessed from on-line TDL-AS records of 13CO2 discrimination, displays small but significant short term responses to CO2 and irradiance in Eucalypt seedlings.
ABSTRACT
INTRODUCTION
MATERIAL & METHODS
RESULTS
DISCUSSION
Importance of the respiratory and photorespiratory terms in the estimation of mesophyll
conductance
Response of gm to CO2 mole fraction.
Response of gm to irradiance
CONCLUSION
CHAPTER III Is mesophyll conductance to CO2 in leaves of three Eucalyptus species sensitive to shortterm changes of irradiance under ambient as well as low O2?
ABSTRACT
INTRODUCTION
MATERIAL AND METHODS
RESULTS
DISCUSSION
Rapid response of mesophyll conductance to irradiance under 21 and 1% O2
Sensitivity of gm estimates to changes of model parameter values
Are the observed variations of gm with O2 realistic?
CONCLUSION
CHAPTER IV
Mesophyll conductance of poplar leaves varies rapidly with changes in CO2 and
irradiance: an assessment from on line 13CO2 discrimination records with TDL-AS.
ABSTRACT
INTRODUCTION
MATERIAL & METHODS
RESULTS
DISCUSSION
Rapid variations of gm with PPFD and CO2
Impact of a stable gm on net CO2 assimilation rate under PPFD variations
CONCLUSION
CONCLUSIONS
and PERSPECTIVES
ANNEX I
REFERENCES
