Up-regulation of cyclic electron flow and down-regulation of linear electron flow in antisense-rca mutant rice

Title:

Up-regulation of cyclic electron flow and down-regulation of linear electron flow in antisense-rca mutant rice

Creator:

Jin, S.-H., Wang, D., Zhu, F.-Y., Li, X.-Q., Sun, J.-W., and Jiang, D. A.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:adf4a162-1a85-4922-9669-37c19e7fde0e
uuid:adf4a162-1a85-4922-9669-37c19e7fde0e
issn:0300-3604
doi:10.1007/s11099-008-0086-9

Subject:

chlorophyll fluorescence, CO2 assimilation rate, intercellular CO2 concentration, post-irradiation transient increase in chlorophyll fluorescence, and P700+ re-reduction

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

To investigate how excess excitation energy is dissipated in a ribulose-1,5-bisphospate carboxylase/oxygenase activase antisense transgenic rice with net photosynthetic rate (PN) half of that of wild type parent, we measured the response curve of PN to intercellular CO2 concentration (Ci), electron transport rate (ETR), quantum yield of open photosystem 2 (PS2) reaction centres under irradiation (Fv'/Fm'), efficiency of total PS2 centres (ΦPS2), photochemical (qP) and non-photochemical quenching (NPQ), post-irradiation transient increase in chlorophyll (Chl) fluorescence (PITICF), and P700+ re-reduction. Carboxylation efficiency dependence on Ci, ETR at saturation irradiance, and Fv'/Fm', ΦPS2, and qP under the irradiation were significantly lower in the mutant. However, NPQ, energy-dependent quenching (qE), PITICF, and P700+ re-reduction were significantly higher in the mutant. Hence the mutant down-regulates linear ETR and stimulates cyclic electron flow around PS1, which may generate the ΔpH to support NPQ and qE for dissipation of excess excitation energy. and S.-H. Jin ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

506-510

Source:

Photosynthetica | 2008 Volume:46 | Number:4

Harvested from:

CDK

Metadata only:

false