TY  - JOUR
AU  - Pinto, Francisco
AU  - Celesti, Marco
AU  - Acebron, Kelvin
AU  - Alberti, Giorgio
AU  - Cogliati, Sergio
AU  - Colombo, Roberto
AU  - Juszczak, Radosław
AU  - Matsubara, Shizue
AU  - Miglietta, Franco
AU  - Palombo, Angelo
AU  - Panigada, Cinzia
AU  - Pignatti, Stefano
AU  - Rossini, Micol
AU  - Sakowska, Karolina
AU  - Schickling, Anke
AU  - Schüttemeyer, Dirk
AU  - Stróżecki, Marcin
AU  - Tudoroiu, Marin
AU  - Rascher, Uwe
TI  - Dynamics of sun‐induced chlorophyll fluorescence and reflectance to detect stress‐induced variations in canopy photosynthesis
JO  - Plant, cell & environment
VL  - 43
IS  - 7
SN  - 1365-3040
CY  - Oxford [u.a.]
PB  - Wiley-Blackwell
M1  - FZJ-2020-01860
SP  - 1637-1654
PY  - 2020
AB  - Passive measurement of sun‐induced chlorophyll fluorescence (F) represents the most promising tool to quantify changes in photosynthetic functioning on a large scale. However, the complex relationship between this signal and other photosynthesis‐related processes restricts its interpretation under stress conditions. To address this issue, we conducted a field campaign by combining daily airborne and ground‐based measurements of F (normalized to photosynthetically active radiation), reflectance and surface temperature and related the observed changes to stress‐induced variations in photosynthesis. A lawn carpet was sprayed with different doses of the herbicide Dicuran. Canopy‐level measurements of gross primary productivity indicated dosage‐dependent inhibition of photosynthesis by the herbicide. Dosage‐dependent changes in normalized F were also detected. After spraying, we first observed a rapid increase in normalized F and in the Photochemical Reflectance Index, possibly due to the blockage of electron transport by Dicuran and the resultant impairment of xanthophyll‐mediated non‐photochemical quenching. This initial increase was followed by a gradual decrease in both signals, which coincided with a decline in pigment‐related reflectance indices. In parallel, we also detected a canopy temperature increase after the treatment. These results demonstrate the potential of using F coupled with relevant reflectance indices to estimate stress‐induced changes in canopy photosynthesis.
LB  - PUB:(DE-HGF)16
C6  - pmid:32167577
UR  - <Go to ISI:>//WOS:000529868600001
DO  - DOI:10.1111/pce.13754
UR  - https://juser.fz-juelich.de/record/875190
ER  -