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| Hauptseite > Publikationsdatenbank > Dynamics of sun‐induced chlorophyll fluorescence and reflectance to detect stress‐induced variations in canopy photosynthesis > print |
| Hauptseite > Publikationsdatenbank > Dynamics of sun‐induced chlorophyll fluorescence and reflectance to detect stress‐induced variations in canopy photosynthesis > print |
| 001 | 875190 | ||
| 005 | 20220930130236.0 | ||
| 024 | 7 | _ | |a 10.1111/pce.13754 |2 doi |
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| 024 | 7 | _ | |a 1365-3040 |2 ISSN |
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| 100 | 1 | _ | |a Pinto, Francisco |0 P:(DE-Juel1)138884 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Dynamics of sun‐induced chlorophyll fluorescence and reflectance to detect stress‐induced variations in canopy photosynthesis |
| 260 | _ | _ | |a Oxford [u.a.] |c 2020 |b Wiley-Blackwell |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a 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. |
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| 773 | _ | _ | |a 10.1111/pce.13754 |g p. pce.13754 |0 PERI:(DE-600)2020843-1 |n 7 |p 1637-1654 |t Plant, cell & environment |v 43 |y 2020 |x 1365-3040 |
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