Response of photosynthetic apparatus of spring barley (Hordeum vulgare L.) to combined effect of elevated CO2 concentration and different growth irradiance

Title:

Response of photosynthetic apparatus of spring barley (Hordeum vulgare L.) to combined effect of elevated CO2 concentration and different growth irradiance

Creator:

Kurasová, I., Kalina, J., Štroch, M., Urban, O., and Špunda, V.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:f9ce7dee-9e80-4b2e-b5b6-215ee4c23448
uuid:f9ce7dee-9e80-4b2e-b5b6-215ee4c23448
issn:0300-3604
doi:10.1023/B:PHOT.0000011953.36956.a3

Subject:

ambient and elevated CO2 concentration, chlorophyll a fluorescence, high irradiance, photosynthesis, and xanthophyll cycle

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

The response of barley (Hordeum vulgare L. cv. Akcent) to various photosynthetic photon flux densities (PPFDs) and elevated [CO2] [700 μmol (CO2) mol-1; EC] was studied by gas exchange, chlorophyll (Chl) a fluorescence, and pigment analysis. In comparison with barley grown under ambient [CO2] [350 μmol (CO2) mol-1; AC] the EC acclimation resulted in a decrease in photosynthetic capacity, reduced stomatal conductance, and decreased total Chl content. The extent of acclimation depression of photosynthesis, the most pronounced for the plants grown at 730 μmol m-2 s-1 (PPFD730), may be related to the degree of sink-limitation. The increased non-radiative dissipation of absorbed photon energy for all EC plants corresponded to the higher de-epoxidation state of xanthophylls only for PPFD730 barley. Further, a pronounced decrease in photosystem 2 (PS2) photochemical efficiency (given as FV/FM) for EC plants grown at 730 and 1 200 μmol m-2 s-1 in comparison with AC barley was related to the reduced epoxidation of antheraxanthin and zeaxanthin back to violaxanthin in darkness. Thus the EC conditions sensitise the photosynthetic apparatus of high-irradiance acclimated barley plants (particularly PPFD730) to the photoinactivation of PS2. and I. Kurasová ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

209-219

Source:

Photosynthetica | 2003 Volume:41 | Number:2

Harvested from:

CDK

Metadata only:

false