Effects of cold-hardening on chilling-induced photoinhibition of photosynthesis and on xanthophyll cycle pigments in sweet pepper

Title:

Effects of cold-hardening on chilling-induced photoinhibition of photosynthesis and on xanthophyll cycle pigments in sweet pepper

Creator:

Liu, Peng, Meng, Qing-wei, Zou, Qi, Zhao, Shi-jie, and Liu, Qing-zhong

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:94eaa3e4-21ae-45da-be5b-8808b194c6ee
uuid:94eaa3e4-21ae-45da-be5b-8808b194c6ee
issn:0300-3604
doi:10.1023/A:1015155032135

Subject:

acclimation, antheraxanthin, Capsicum annuum, chlorophyll fluorescence, neoxanthin, violaxanthin, and zeaxanthin

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Two cultivars of Capsicum annuum L. were acclimated for 5 d at sub-optimal temperature (14 °C) and irradiance of 250 µmol m-2 s-1. This cold-hardening resulted in some reduction in the extent of photoinhibition during an 8 h exposure to high irradiance at 4 °C. Obvious differences were observed between non-hardened leaves (NHL) and cold-hardened leaves (CHL) in the recovery under low irradiance at room temperature. The CHL of both cultivars recovered faster than NHL, especially during the initial fast phase of recovery. Compared with NHL, the total content of carotenoids (Cars), based on chlorophyll, Chl (a+b), and the proportions of xanthophyll cycle pigments referred to total Cars increased in CHL, mainly due to an increase of violaxanthin (V) + antheraxanthin (A) + zeaxanthin (Z) content per mol Chl (a+b). Faster development and a higher non-photochemical quenching (NPQ) of Chl fluorescence, related to a stronger deepoxidation of the larger xanthophyll cycle pool in NHL, could act as a major defence mechanism to reduce the formation of reactive oxygen species during severe chilling. This is suggested by higher content of Z or Z+A in photoinhibition as well as by its rapid decline during the initial fast phase of recovery. In contrast to the chilling-sensitive cv. 0004, the chilling-tolerant cv. 1141 did more easily acclimate its photosynthetic apparatus to low temperatures. and Peng Liu ... [et al.].

Language:

Multiple languages

Rights:

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

Coverage:

467-472

Source:

Photosynthetica | 2001 Volume:39 | Number:3

Harvested from:

CDK

Metadata only:

false