Click on “Download PDF” for the PDF version or on the title for the HTML version.


If you are not an ASABE member or if your employer has not arranged for access to the full-text, Click here for options.

A Kinetic Model for Delayed Fluorescence from Plants

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  2007 ASAE Annual Meeting  077003.(doi:10.13031/2013.22957)
Authors:   Ya Guo, Brian J Wirth, Jinglu Tan
Keywords:   Delayed Fluorescence, Electron Transport Chain, Photosynthesis, Modeling

A new kinetic model of delayed fluorescence was developed based on the electron transport process with three state variables, QA-, QB-, and QB2-; fewer than the five state variables (QA-QB, QAQB-, QA-QB-, QAQB2- and QA-QB2- ) used in previous models. Delayed fluorescence in drought-stressed soybean, DCMU-treated corn, and healthy plants was measured with a photon-counting system. The data were used to verify the model through nonlinear least-squares optimization. There were no visible differences between the healthy and the stressed plants. The model showed a significant reduction in the electron generating efficiency in the drought-stressed samples. The model also showed a significant decrease of activated QAQB sites in the DCMU-treated samples, consistent with the mechanism by which DCMU functions. The difference between the experimental and predicted values is about 5%. The results prove that the new model is an effective and reduced model structure for delayed fluorescence from plants.

(Download PDF)    (Export to EndNotes)