Biphasic regulation of superoxide radical levels in Mn-depleted and photoactivated photosystem II

Title:

Biphasic regulation of superoxide radical levels in Mn-depleted and photoactivated photosystem II

Creator:

Song, Y.-G., Liu, B., Liu, Y.-P., L.-B., Villamena, F. A., and Liu, Y.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:b3897a66-13fd-4786-a2a5-36ad45f51926
uuid:b3897a66-13fd-4786-a2a5-36ad45f51926
issn:0300-3604
doi:10.1007/s11099-011-0044-9

Subject:

botanika, botany, biphasic regulation, cyytochrome b559, Mn-depletion, photoactivation, photosystem II, and superoxide radical

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

In the past decades, it has become clear that superoxide radical (O2 .-) can be generated from photosystem II (PSII) during photosynthesis. Depending on the extent of its accumulation, O2 .- plays an important role in plant physiology and pathology. The photoinhibition/repair cycle is a typical process in PSII which is mainly responsible for the survival of plants under the photoinihibition condition. It is therefore of significant importance to determine O2 .- production in this cycle, and then explore how O2 .- is controlled by PSII within a normal physiological level. With this in mind, we herein investigate the variation of the O2 .- levels in PSII under Mn-depleted and photoactivated conditions mimicking the photoinhibition/repair cycle in vitro. The effect of intrinsic SOD-like component on the O2 .- levels was also studied. Results show that PSII has the ability to regulate the O2 .- levels in these two processes by simultaneously modulating the O2 .- generation activity and intrinsic SOD-like activity. This finding could shed new lights on the photoprotective property of PSII against O2 .- and other reactive oxygen species. and Y. G. Song ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

353-360

Source:

Photosynthetica | 2011 Volume:49 | Number:3

Harvested from:

CDK

Metadata only:

false