Variation in the carbon and oxygen isotope composition of plant biomass and its relationship to water-use efficiency at the leaf- and ecosystem-scales in a northern Great Plains grassland

2013 ◽  
Vol 37 (2) ◽  
pp. 425-438 ◽  
Author(s):  
LAWRENCE B. FLANAGAN ◽  
GRAHAM D. FARQUHAR
Keyword(s):  
Water Use Efficiency ◽  
Oxygen Isotope ◽  
Water Use ◽  
Great Plains ◽  
Plant Biomass ◽  
Isotope Composition ◽  
Oxygen Isotope Composition ◽  
Northern Great Plains ◽  
Carbon And Oxygen Isotope ◽  
Use Efficiency

scholarly journals Elevated CO2increases tree-level intrinsic water use efficiency: insights from carbon and oxygen isotope analyses in tree rings across three forest FACE sites

2012 ◽  
Vol 197 (2) ◽  
pp. 544-554 ◽  
Author(s):  
Giovanna Battipaglia ◽  
Matthias Saurer ◽  
Paolo Cherubini ◽  
Carlo Calfapietra ◽  
Heather R. McCarthy ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Oxygen Isotope ◽  
Water Use ◽  
Tree Rings ◽  
Tree Level ◽  
Carbon And Oxygen Isotope ◽  
Intrinsic Water Use Efficiency ◽  
Use Efficiency ◽  
Isotope Analyses

scholarly journals The physiological basis for genetic variation in water use efficiency and carbon isotope composition in Arabidopsis thaliana

2013 ◽  
Vol 119 (1-2) ◽  
pp. 119-129 ◽  
Author(s):  
Hsien Ming Easlon ◽  
Krishna S. Nemali ◽  
James H. Richards ◽  
David T. Hanson ◽  
Thomas E. Juenger ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Genetic Variation ◽  
Water Use Efficiency ◽  
Carbon Isotope ◽  
Water Use ◽  
Isotope Composition ◽  
Carbon Isotope Composition ◽  
Physiological Basis ◽  
Use Efficiency

scholarly journals Interaction of CO<sub>2</sub> concentrations and water stress in semiarid plants causes diverging response in instantaneous water use efficiency and carbon isotope composition

2017 ◽  
Vol 14 (14) ◽  
pp. 3431-3444 ◽  
Author(s):  
Na Zhao ◽  
Ping Meng ◽  
Yabing He ◽  
Xinxiao Yu
Keyword(s):  
Water Stress ◽  
Gas Exchange ◽  
Water Use Efficiency ◽  
Water Use ◽  
Environmental Changes ◽  
Isotope Composition ◽  
Water Soluble ◽  
Severe Drought ◽  
Semiarid Areas ◽  
Use Efficiency

Abstract. In the context of global warming attributable to the increasing levels of CO2, severe drought may be more frequent in areas that already experience chronic water shortages (semiarid areas). This necessitates research on the interactions between increased levels of CO2 and drought and their effect on plant photosynthesis. It is commonly reported that 13C fractionation occurs as CO2 gas diffuses from the atmosphere to the substomatal cavity. Few researchers have investigated 13C fractionation at the site of carboxylation to cytoplasm before sugars are exported outward from the leaf. This process typically progresses in response to variations in environmental conditions (i.e., CO2 concentrations and water stress), including in their interaction. Therefore, saplings of two typical plant species (Platycladus orientalis and Quercus variabilis) from semiarid areas of northern China were selected and cultivated in growth chambers with orthogonal treatments (four CO2 concentration ([CO2])  ×  five soil volumetric water content (SWC)). The δ13C of water-soluble compounds extracted from leaves of saplings was determined for an assessment of instantaneous water use efficiency (WUEcp) after cultivation. Instantaneous water use efficiency derived from gas-exchange measurements (WUEge) was integrated to estimate differences in δ13C signal variation before leaf-level translocation of primary assimilates. The WUEge values in P. orientalis and Q.  variabilis both decreased with increased soil moisture at 35–80 % of field capacity (FC) and increased with elevated [CO2] by increasing photosynthetic capacity and reducing transpiration. Instantaneous water use efficiency (iWUE) according to environmental changes differed between the two species. The WUEge in P. orientalis was significantly greater than that in Q. variabilis, while an opposite tendency was observed when comparing WUEcp between the two species. Total 13C fractionation at the site of carboxylation to cytoplasm before sugar export (total 13C fractionation) was species-specific, as demonstrated in the interaction of [CO2] and SWC. Rising [CO2] coupled with moistened soil generated increasing disparities in δ13C between water-soluble compounds (δ13CWSC) and estimates based on gas-exchange observations (δ13Cobs) in P. orientalis, ranging between 0.0328 and 0.0472 ‰. Differences between δ13CWSC and δ13Cobs in Q. variabilis increased as [CO2] and SWC increased (0.0384–0.0466 ‰). The 13C fractionation from mesophyll conductance (gm) and post-carboxylation both contributed to the total 13C fractionation that was determined by δ13C of water-soluble compounds and gas-exchange measurements. Total 13C fractionation was linearly dependent on stomatal conductance, indicating that post-carboxylation fractionation could be attributed to environmental variation. The magnitude and environmental dependence of apparent post-carboxylation fractionation is worth our attention when addressing photosynthetic fractionation.

Carbon and oxygen isotope composition of Nautilus macromphalus: a record of thermocline waters off New Caledonia

2004 ◽  
Vol 207 (1-2) ◽  
pp. 91-100 ◽  
Author(s):  
Anne-Cécile Auclair ◽  
Christophe Lecuyer ◽  
Hugo Bucher ◽  
Simon M.F Sheppard
Keyword(s):  
Oxygen Isotope ◽  
New Caledonia ◽  
Isotope Composition ◽  
Oxygen Isotope Composition ◽  
Carbon And Oxygen Isotope

scholarly journals Effects of mistletoe removal on growth, N and C reserves, and carbon and oxygen isotope composition in Scots pine hosts

2016 ◽  
Vol 36 (5) ◽  
pp. 562-575 ◽  
Author(s):  
Cai-Feng Yan ◽  
Arthur Gessler ◽  
Andreas Rigling ◽  
Matthias Dobbertin ◽  
Xing-Guo Han ◽  
...  
Keyword(s):  
Oxygen Isotope ◽  
Scots Pine ◽  
Isotope Composition ◽  
Oxygen Isotope Composition ◽  
Carbon And Oxygen Isotope
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