Photoprotective mechanisms in cold-acclimated and nonacclimated needles of Picea glehnii

Title:

Photoprotective mechanisms in cold-acclimated and nonacclimated needles of Picea glehnii

Creator:

Bae, J.-J., Choo, Y.-S., Ono, K., Sumida, A., and Hara, T.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:37614c70-d9a7-4997-93e0-8a8857d6c912
uuid:37614c70-d9a7-4997-93e0-8a8857d6c912
issn:0300-3604
doi:10.1007/s11099-010-0015-6

Subject:

botanika, botany, ascorbate peroxidase, low temperature, lutein, photoprotective mechanisms, Picea glehnii, and zeaxanthin

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

The response of Picea glehnii, a cold-tolerant species in the boreal zone, to air temperature (T) was investigated for its cold-acclimated needles (i.e. the ones subjected to gradual decrease in T) and nonacclimated needles (i.e. the ones subjected to a sudden decrease in T) were compared under low temperature. Cold-acclimated needles showed a greater increase of zeaxanthin and lutein contents than nonacclimated ones, whereas the nonacclimated needles showed a greater increase of thylakoid-bound ascorbate peroxidase (tAPX) activity than cold-acclimated ones under chilling conditions (after cold acclimation). These results suggest that: (1) low T induces the increase of zeaxanthin and lutein content, and tAPX activity; (2) accumulated zeaxanthin and lutein protect needles from photooxidative stress by dissipating excess energy before the reactive oxygen species (ROS) are formed in response to a gradual decrease in T (with cold acclimation and subsequent chilling condition), and by tAPX scavenging ROS formed in the case of a sudden decrease in T (without cold acclimation and chilling condition). and J.-J. Bae ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

110-116

Source:

Photosynthetica | 2010 Volume:48 | Number:1

Harvested from:

CDK

Metadata only:

false