SYSTEMS AND METHODS FOR ESTIMATING PHOTOSYNTHETIC CARBON ASSIMLATION
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United States of America Patent
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Issued Date -
Dec 6, 2012
app pub date -
May 31, 2012
filing date -
May 31, 2011
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Abandoned
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Abstract
Methods, devices, and systems for measuring carbon assimilation based on simultaneous or near-simultaneous measurements of chlorophyll fluorescence and stomatal conductance of plant. A sample containing chlorophyll, such as a plant leaf, is illuminated with light, e.g., in the form of a single saturating pulse or multiple pulses, and chlorophyll fluorescence and stomatal conductance of the chlorophyll sample are measured. A porometer or infra-red gas analyzer is used to measure stomatal conductance and a photodetector is used to measure fluorescence. A carbon assimilation value for the chlorophyll sample is determined using the measured chlorophyll fluorescence and the measured stomatal conductance.
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