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National Repository of Grey Literature 1 records found  Search took 0.00 seconds. 
Krátké periody světelných skvrn jsou při indukci fotosyntézy u smrku ztepilého účinnější
 Košvancová, Martina ; Urban, Otmar
Plants growing in the forest understorey are subjected to both prolonged low diffuse background light and transient lightflecks, which provide high light intensities for a few seconds or minutes.The photosynthetic response to fluctuating irradiances is dependent on the following main features of: 1) photosynthetic induction response to a rise in the irradiance, 2) ability to maintain photosynthetic induction under low-light conditions, which allows a plant to better exploit the next lightfleck, 3) stomatal response to light intensity, and 4) ability to extend the photosynthetic activity into the shade period immediately following a pulse of high light, i.e. post-illumination CO2 fixation. In this study we determined the impact of oscillating irradiance with different times of period on the activation and deactivation of CO2 assimilation processes and light use efficiency during the lightflecks.
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