Excitation kinetics of chlorophyll fluorescence during light-induced greening and establishment of photosynthetic activity of barley seedlings

Title:

Excitation kinetics of chlorophyll fluorescence during light-induced greening and establishment of photosynthetic activity of barley seedlings

Creator:

Buschmann, C., Konanz, S., Zhou, M., Lenk, S., Kocsányi, L., and Barócsi, A.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:c4c5c11f-7c11-48de-b7ca-71ab8f1744c0
uuid:c4c5c11f-7c11-48de-b7ca-71ab8f1744c0
issn:0300-3604
doi:10.1007/s11099-013-0017-2

Subject:

botanika, botany, chlorophyll fluorescence, embedded system, induction kinetics, intelligent sensors, Kautsky effect, light adaptation, 2, and 58

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Excitation kinetics based on feedback regulation of chlorophyll (Chl) fluorescence of leaves measured with the chlorophyll fluorometer, FluoroMeter Modul (FMM), are presented. These kinetics showed the variation of excitation light (laser power, LP) regulated by the feedback mechanism of the FMM, an intelligent Chl fluorometer with embedded computer, which maintains the fluorescence response constant during the 300-s transient between the dark- and light-adapted state of photosynthesis. The excitation kinetics exhibited a rise of LP with different time constants and fluctuations leading to a type of steady state. The variation of excitation kinetics were demonstrated using the example of primary leaves of etiolated barley seedlings (Hordeum vulgare L. cv. Barke) during 48 h of greening in the light with gradual accumulation of Chl and development of photosynthetic activity. The excitation kinetics showed a fast rise followed by a short plateau at ca. 30 s and finally a slow constant increase up to 300 s. Only in the case of 2 h of greening in the light, the curve reached a stable steady state after 75 s followed by a slight decline. The final LP value (at 300 s of illumination) increased up to 12 h of greening and decreased with longer greening times. The active feedback mechanism of the FMM adjusted the excitation light during the measurement to the actual photosynthetic capacity of the individual leaf sample. In this way, the illumination with excessive light was avoided. The novel excitation kinetics can be used to characterize health, stress, disease, and/or product quality of plant material., C. Buschmann ... [et al.]., and Obsahuje bibliografii

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

221-230

Source:

Photosynthetica | 2013 Volume:51 | Number:2

Harvested from:

CDK

Metadata only:

false