Leaf gas exchange measurements
Scaling Leaf Measurements to Estimate Whole Canopy Gas Exchanges of Cotton
... Diurnal leaf and canopy gas exchanges of well-watered field grown cotton were ...scale leaf-level values of transpiration and net assi- milation to the whole canopy level using estimates of canopy ...
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Higher rates of leaf gas exchange are associated with higher leaf hydrodynamic pressure gradients
... Controlled gas-exchange measurements (Franks & Farquhar 1999; Comstock 2000) have shown the opposite trend ...k leaf will result if ∂ a/ ∂ P g declines in asso- ciation with increasing g w and ...
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Effect of ontogeny, heterophylly and leaf position on the gas exchange of the hop plant
... detailed measurements of the gas exchange during the ontogenic development of individual leaf types in the entire vertical profile of the hop plants have so far been performed in mini- mal ...
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Sensitivity of a leaf gas-exchange model for estimating paleoatmospheric CO2 concentration
... Abstract. Leaf gas-exchange models show considerable promise as paleo-CO 2 ...on measurements that can be made directly from fossils (leaf δ 13 C and stomatal density and size) and on a ...
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A multiplexed gas exchange system for increased throughput of photosynthetic capacity measurements
... each leaf into a chamber, p = time to remove each leaf from the chamber, a = time for each leaf to acclimate to chamber conditions, and r = time allowed to record sta- ble gas exchange ...
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Parameterization of a coupled CO2 and H2O gas exchange model at the leaf scale of Populus euphratica
... Populus euphratica Oliv. is the dominant native woody species in the reserve, whose average age is 25 years, and their growth status is good. The stem density was 500 plants ha −1 . Mean tree height is 10 m and men ...
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A whole-plant chamber system for parallel gas exchange measurements of Arabidopsis and other herbaceous species
... single-leaf measurements can be problematic for several ...the leaf surface ...the leaf is needed to get a useful average assimilation ...to leaf size restrictions. Thus, while single ...
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Midday Stem Water Potential Values Needed to Maintain Photosynthesis and Leaf Gas Exchange Established for Pecan
... Naor et al., 2008). However, the sensitivity of the measurement to water deficit and its ability to define a precise threshold value beyond which irrigation is required dictates which plant-based measurement is adopted ...
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Leaf Gas Exchange, Photon Capture and Light Harvest in Aldina heterophylla along a Vegetation Gradient in the Amazon Rainforest
... These less constant environments induce plants to also exhibit less stable metabolic responses, as demonstrated by [4]. This sensitivity to environmental changes can lead to a decrease in the occurrence of this species ...
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gas exchange, Elaeis guineensis Jacq., leaf water potential, moisture regime, stomatal conductance, water deficit
... that measurements of leaf water potential and stomatal conductance can be considered as sufficiently good indicators of oil palm water status and can be used for scheduling of ...
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Gas exchange measurements, what can they tell us about the underlying limitations to photosynthesis? Procedures and sources of error
... across leaf surfaces, the measurements will be less prone to errors in calculations resulting from spatial heterogeneity of stomatal conductance and photo- synthetic capacity (Cheeseman, ...entire ...
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Biomass allocation, leaf gas exchange and nutrient uptake of hazelnut seedlings in response to Trichoderma harzianum and Glomus intraradices inoculation
... Biomass allocation measurements. seedlings were destructively harvested and the soil adher- ing to the root system was gently cleaned and the aboveground parts and roots were separated at the root collar. The ...
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Changes in γ-aminobutyric acid concentration, gas exchange, and leaf anatomy in Eucalyptus clones under drought stress and rewatering
... Modification of stomatal density in response to drought varies between plant species and depends on the severity of water deficit. For example, a drought-induced reduction in stomata numbers was observed in Eucalyptus ...
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Sap flow, leaf-level gas exchange and spectral responses to drought in Pinus sylvestris, Pinus pinea and Pinus halepensis
... out gas exchange measurements, MR and JM carried out the spectro-radiometry measurements, JZ was in charge of the nursery and laboratory measurements, EMF and JM performed the ...
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LEAF GAS EXCHANGE, CHLOROPHYLL FLUORESCENCE, GROWTH AND ROOT YIELD OF ASHWAGANDHA ( WITHANIA SOMNIFERA DUNAL.) UNDER SOIL MOISTURE STRESS
... Stomatal conductance was correlated with leaf water potential and soil water potential. Stomata, then, play a critical role in regulating water flow and maintaining Ø in the plants at levels such that ...
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Changes in leaf water relations, gas exchange, growth and flowering quality in potted geranium plants irrigated with different water regimes
... where ε is expressed in MPa, Ψ os is the osmotic potential at full turgor (MPa) and RWC tlp is the relative water content at turgor loss point. Leaves were excised in the dark, placed in plastic bags and allowed to reach ...
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The economic challenge of leaf gas exchange
... Acknowledgments I would first like to thank my supervisors Graham Farquhar, Florian Busch and Tim Brodribb. To Graham, it has been an honour and a pleasure to learn from such a great scientist over this journey. Your ...
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Trace Gas Exchange Measurements with Standard Infrared Analyzers
... trace gas fluxes (= mass transport per unit time and area; can be emission or deposition) of trace gases between the ground and the boundary layer can often not be measured by a “gradient” or a related ...trace ...
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Leaf thickness and gas exchange are indicators of drought stress tolerance of sugarcane
... in gas exchange and plant growth. Sugarcane leaf width, specific leaf area, stomatal conductance, transpiration, photosynthesis and carboxylation efficiency were quite sensitive to changes in ...
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Seasonal leaf gas exchange and water potential in a woody cerrado species community
... and leaf water balance as positive as possible after the peak of leaf gas exchange in early morning (Franco, 1998; Moraes and Prado, 1998; Meinzer, et ...
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