The effect of additional red irradiation on the photosynthetic apparatus of Pisum sativum

Title:

The effect of additional red irradiation on the photosynthetic apparatus of Pisum sativum

Creator:

Topchiy, N. M., Sytnik, S. K., Syvash, O. O., and Zolotareva, O. K.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:555de52f-d4bb-4425-b106-67126b005147
uuid:555de52f-d4bb-4425-b106-67126b005147
issn:0300-3604
doi:10.1007/s11099-005-0072-4

Subject:

chlorophyll, light-emitting diodes, light-harvesting complex, non-photochemical quenching, photosystem 2, Pisum sativum, photochemical quenching, and spectral composition of radiation

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Pisum sativum (L.) plants were grown under "white" luminescent lamps, W [45 µ mol(quantum) m-2 s-1] or under the same irradiation supplemented with narrow spectrum red light-emitting diodes (LEDs), RE [λmax = 660 nm, Δλ = 20 nm, 40 µmol(quantum) m-2 s-1]. Significant differences in the chlorophyll (Chl) a fluorescence parameters, degree of State 1-State 2 transition, and the pigment-protein contents were found in plants grown under differing spectral composition. Addition of red LEDs to the "white light" resulted in higher effective quantum yield of photosystem 2 (PS2), i.e. F'v/F'm, linear electron transport (ϕPS2), photochemical quenching (qP), and lower non-photochemical quenching (qN as well as NPQ). The RE plants were characterised by higher degree State 1-State 2 transition, i.e. they were more effective in radiant energy utilisation. Judging from the data of "green" electrophoresis of Chl containing pigment-protein complexes of plants grown under various irradiation qualities, the percentage of Chl in photosystem 2 (PS2) reaction centre complexes in RE plants was higher and there was no difference in the total Chl bound with Chl-proteins of light-harvesting complexes (LHC2). Because the ratio between oligomeric and monomeric LHC2 forms was higher in RE plants, we suggest higher LHC2 stability in these ones. and N. M. Topchyi ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

451-456

Source:

Photosynthetica | 2005 Volume:43 | Number:3

Harvested from:

CDK

Metadata only:

false