Active in situ and passive airborne fluorescence measurements for water stress detection on a fescue field
CGSpace
View Archive InfoField | Value | |
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
|
|