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000059237 084__ $$2WoS$$aPlant Sciences
000059237 1001_ $$0P:(DE-HGF)0$$aSoukupová, J.$$b0
000059237 245__ $$aAnnual variation of the steady-state chlorophyll fluorescence emission of evergreen plants in temperate zone
000059237 260__ $$aCollingwood, Victoria$$bCSIRO Publ.$$c2008
000059237 300__ $$a63 - 76
000059237 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article
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000059237 440_0 $$09141$$aFunctional Plant Biology$$v35$$x1445-4408
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000059237 520__ $$aRemotely sensed passive chlorophyll fluorescence emission has a potential to become one of the major global-scale reporter signals on vegetation performance and stress. In contrast to the actively probed parameters such as maximal (FM') or minimal (F-0') emission, the steady-state chlorophyll fluorescence, Chl-F-S, (FM' > Chl-FS > F-0') has not been adequately studied. Using fluorescence imaging of leaves, we explored the modulation of Chl-F-S by actinic irradiance and by temperature in laboratory, as well as the changes that occurred in three coniferous and broadleaf plant species grown in field. The experiments revealed that Chl-F-S is largely insensitive to the incident irradiance once this is above early morning or late evening levels. The characteristic, pre-noon measured Chl-F-S correlated positively with the CO2 assimilation rate when measured in field during the year. It was low and stable in the cold winter months and steeply increased with the spring onset. The high values of the characteristic Chl-F-S persisted throughout the vegetation season and rapidly decreased in the fall. The seasonal Chl-F-S transitions coincided with the last spring frosts or the first fall frosts that persisted for several consecutive nights. The transitions were marked by an elevated variability of the Chl-F-S signal. We propose that the signal variability occurring during the transition periods can be used to detect from satellites the beginning and the end of the photosynthetic activity in evergreen canopies of the temperate zone.
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000059237 65320 $$2Author$$aimaging
000059237 65320 $$2Author$$aoverwintering plants
000059237 65320 $$2Author$$aphotosynthetic activity
000059237 65320 $$2Author$$aPicea
000059237 65320 $$2Author$$aremote sensing
000059237 65320 $$2Author$$aRhododendron
000059237 7001_ $$0P:(DE-HGF)0$$aCséfalvay, L.$$b1
000059237 7001_ $$0P:(DE-HGF)0$$aUrban, O.$$b2
000059237 7001_ $$0P:(DE-HGF)0$$aKosvancová, M.$$b3
000059237 7001_ $$0P:(DE-HGF)0$$aMarek, M.$$b4
000059237 7001_ $$0P:(DE-Juel1)129388$$aRascher, U.$$b5$$uFZJ
000059237 7001_ $$0P:(DE-HGF)0$$aNedbal, L.$$b6
000059237 773__ $$0PERI:(DE-600)1496158-1$$a10.1071/FP07158$$gVol. 35, p. 63 - 76$$p63 - 76$$q35<63 - 76$$tFunctional plant biology$$v35$$x1445-4408$$y2008
000059237 8567_ $$uhttp://dx.doi.org/10.1071/FP07158
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000059237 9141_ $$y2008
000059237 915__ $$0StatID:(DE-HGF)0010$$aJCR/ISI refereed
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