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Photosynthetic Gas Exchange in Land Plants at the Leaf Level
2018Leaf-level gas exchange enables insights into the physiology and in vivo biochemical processes of plants. Advances in infrared gas analysis have resulted in user-friendly off-the-shelf gas exchange systems that allow researchers to collect physiological measurements with the push of a few buttons.
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The Importance of Leaf Gas Films for Gas Exchange During Submergence
Superhydrophobic leaves retain a thin gas film on the leaf surface when submerged in water. The gas films facilitate gas exchange with the floodwater thereby partly overcoming the 10,000-fold slower diffusion of gasses in water compared to in air. In light, the enhanced gas exchange increases the flux of CO2 into submerged leaves so that underwater netPedersen, Ole, Herzog, Max
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Physical and biological controls on leaf gas exchange
2017Stomata are portals in plant leaves that control gas exchange. The relation between stomatal aperture and gas exchange through the stomatal pore can be described by physical models derived from Fick’s first law of diffusion. A combination of gas exchange measurements and microscopical observations of stomatal openings was used to investigate the ...
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Photosynthesis and Gas Exchange of Acetabularia Chloroplasts in an Artificial Leaf
Nature, 1971ISOLATED chloroplast preparations offer great advantages in the analysis of carbon pathways of photosynthesis because the system is not complicated by non-chloroplast metabolism, and kinetic analyses1 can be made which are difficult with whole leaves2.
W. A. DODD, R. G. S. BIDWELL
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The effects of SO2 on components of leaf resistance to gas exchange
Environmental Pollution Series A, Ecological and Biological, 1980Abstract The effects of SO 2 on the gas exchange of red kidney soybeans Phaseolus vulgaris L. (‘red kidney’) were studied under fluctuating SO 2 levels at both high and low humidities. Single event SO 2 exposures with a peak concentration of 2·0 ppm and a 1-h average of 0·5 ppm were used to study responses of photosynthesis and transpiration of ...
J.R. Barton +2 more
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LEAF TEMPERATURE MEASUREMENT AND CONTROL IN A GAS-EXCHANGE CUVETTE
Canadian Journal of Plant Science, 1973Leaf temperature was determined using 0.025-mm junction-welded and 0.125-mm beaded thermocouples. The use of fine-wire thermocouples was necessary to avoid errors in measurement that exceeded 2.5 degrees C in well-watered and 3.5 degrees C in water-stressed plants when using beaded thermocouples.
C. L. BEADLE +2 more
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A Two-Dimensional Model of Leaf Gas Exchange with Special Reference to Leaf Anatomy
Journal of Biogeography, 1995This model of leaf gas exchange includes (1) two-dimensional C02, 02 and water vapour diffusion in inter- cellular space schematized according to leaf anatomy, (2) CO2 assimilation by mesophyll cells as described by Farquhar's model of photosynthesis and (3) stomatal movements as a regulating factor. Parameters describing the leaf cross-section and gas
Ludmila B. Pachepsky +2 more
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Isotopically nonstationary metabolic flux analysis (INST-MFA) is a powerful technique for studying plant central metabolism, which involves introducing a 13CO2 tracer to plant leaves and sampling the labeled metabolic intermediates during the transient period before reaching an isotopic steady state. The metabolic intermediates involved in the C3 cycle
Yuan, Xu +3 more
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Yuan, Xu +3 more
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Quantifying and modelling the responses of leaf gas exchange to drought
2020Global climate change is expected to increase drought duration and intensity in certain regions while increasing rainfall in others. The quantitative consequences of increased drought for ecosystems are not easy to predict. Process-based models must be informed by experiments to determine the resilience of plants and ecosystems from different climates.
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