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Canopy chlorophyll fluorescence applied to stress detection using an easy-to-build micro-lidar

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Title Canopy chlorophyll fluorescence applied to stress detection using an easy-to-build micro-lidar
 
Creator Moya, I.
Loayza, H.
Llanos, M.
Quiróz, R.
Ounis, A.
Goulas, Y.
 
Subject canopy
chlorophyll
stress
sweet potatoes
 
Description LEDFLEX is a micro-lidar dedicated to the measurement of vegetation fluorescence. The light source consists of 4 blue Light-Emitting Diodes (LED) to illuminate part of the canopy in order to average the spatial variability of small crops. The fluorescence emitted in response to a 5-μs width pulse is separated from the ambient light through a synchronized detection. Both the reflectance and the fluorescence of the target are acquired simultaneously in exactly the same field of view, as well as the photosynthetic active radiation and air temperature. The footprint is about 1 m2 at a distance of 8 m. By increasing the number of LEDs longer ranges can be reached. The micro-lidar has been successfully applied under full sunlight conditions to establish the signature of water stress on pea (Pisum Sativum) canopy. Under well-watered conditions the diurnal cycle presents an M shape with a minimum (Fmin) at noon which is Fmin > Fo. After several days withholding watering, Fs decreases and Fmin 
 
Date 2019-10
2019-07-26T16:12:38Z
2019-07-26T16:12:38Z
 
Type Journal Article
 
Identifier Moya, I.; Loayza, H.; Lopez, M.L.; Quiroz, R.; Ounis, A.; Goulas, Y. 2019. Canopy chlorophyll fluorescence applied to stress detection using an easy-to-build micro-lidar. Photosynthesis Research. ISSN: 1573-5079. First Online 25May2019. 15 p.
1573-5079
https://hdl.handle.net/10568/102367
https://doi.org/10.1007/s11120-019-00642-9
 
Language en
 
Rights CC-BY-4.0
Open Access
 
Format 1-15
 
Publisher Springer Science and Business Media LLC
 
Source Photosynthesis Research