TY  - JOUR
AU  - Migliavacca, Mirco
AU  - Perez-Priego, Oscar
AU  - Rossini, Micol
AU  - El-Madany, Tarek S.
AU  - Moreno, Gerardo
AU  - van der Tol, Christiaan
AU  - Rascher, Uwe
AU  - Berninger, Anna
AU  - Bessenbacher, Verena
AU  - Burkart, Andreas
AU  - Carrara, Arnaud
AU  - Fava, Francesco
AU  - Guan, Jin-Hong
AU  - Hammer, Tiana W.
AU  - Henkel, Kathrin
AU  - Juarez-Alcalde, Enrique
AU  - Julitta, Tommaso
AU  - Kolle, Olaf
AU  - Martín, M. Pilar
AU  - Musavi, Talie
AU  - Pacheco-Labrador, Javier
AU  - Pérez-Burgueño, Andrea
AU  - Wutzler, Thomas
AU  - Zaehle, Sönke
AU  - Reichstein, Markus
TI  - Plant functional traits and canopy structure control the relationship between photosynthetic CO$_{2}$ uptake and far-red sun-induced fluorescence in a Mediterranean grassland under different nutrient availability
JO  - The new phytologist
VL  - 214
IS  - 3
SN  - 0028-646X
CY  - Oxford [u.a.]
PB  - Wiley-Blackwell
M1  - FZJ-2017-01788
SP  - 1078–1091
PY  - 2017
AB  - Sun-induced fluorescence (SIF) in the far-red region provides a new noninvasive measurement approach that has the potential to quantify dynamic changes in light-use efficiency and gross primary production (GPP). However, the mechanistic link between GPP and SIF is not completely understood.We analyzed the structural and functional factors controlling the emission of SIF at 760 nm (F760) in a Mediterranean grassland manipulated with nutrient addition of nitrogen (N), phosphorous (P) or nitrogen–phosphorous (NP). Using the soil–canopy observation of photosynthesis and energy (SCOPE) model, we investigated how nutrient-induced changes in canopy structure (i.e. changes in plant forms abundance that influence leaf inclination distribution function, LIDF) and functional traits (e.g. N content in dry mass of leaves, N%, Chlorophyll a+b concentration (Cab) and maximum carboxylation capacity (Vcmax)) affected the observed linear relationship between F760 and GPP.We conclude that the addition of nutrients imposed a change in the abundance of different plant forms and biochemistry of the canopy that controls F760. Changes in canopy structure mainly control the GPP–F760 relationship, with a secondary effect of Cab and Vcmax.In order to exploit F760 data to model GPP at the global/regional scale, canopy structural variability, biodiversity and functional traits are important factors that have to be considered.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000402403900018
C6  - pmid:28181244
DO  - DOI:10.1111/nph.14437
UR  - https://juser.fz-juelich.de/record/827674
ER  -