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Active in situ and passive airborne fluorescence measurements for water stress detection on a fescue field

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Title Active in situ and passive airborne fluorescence measurements for water stress detection on a fescue field
 
Creator Moya, I.
Loayza, H.
López, M.L.
Sánchez, J.M.
Goulas, Y.
Ounis, A.
Quiroz, R.
Calera, A.
 
Subject chlorophylls
drought stress
festuca
 
Description Ledflex is a fluorometer adapted to measure chlorophyll fluorescence at the canopy level. It has been described in detail by Moya et al. (2019), Photosynthesis Research. https://doi.org/10.1007/s11120-019-00642-9. We used this instrument to determine the effect of water stress on the fluorescence of a fescue field under extreme temperature and light conditions through a 12 days campaign during summer in a Mediterranean area. The fescue field formed part of a lysimeter station in "las Tiesas," near Albacete-Spain. In addition to the fluorescence data, the surface temperature was measured using infrared radiometers. Furthermore, "Airflex," a passive fluorometer measuring the filling-in of the atmospheric oxygen absorption band at 760 nm, was installed in an ultralight plane and flown during the most critical days of the campaign. We observed with the Ledflex fluorometer a considerable decrease of about 53% of the stationary chlorophyll fluorescence level at noon under water stress, which was well correlated with the surface temperature difference between the stressed and control plots. Airflex data also showed a decrease in far-red solar-induced fluorescence upon water stress in agreement with surface temperature data and active fluorescence measurements after correction for PS I contribution. Notwithstanding, the results from airborne remote sensing are not as precise as in situ active data.
 
Date 2023-02
2022-12-15T18:39:43Z
2022-12-15T18:39:43Z
 
Type Journal Article
 
Identifier Moya, I.; Loayza, H.; López, M.L.; Sánchez, J.M.; Goulas, Y.; Ounis, A.; Quiroz, R.; Calera, A. 2022. Active in situ and passive airborne fluorescence measurements for water stress detection on a fescue field. Photosynthesis Research. ISSN 1573-5079.
1573-5079
https://hdl.handle.net/10568/126029
https://doi.org/10.1007/s11120-022-00983-y
https://doi.org/10.21223/7QY6KU
 
Language en
 
Rights CC-BY-4.0
Open Access
 
Publisher Springer Science and Business Media LLC