Susceptibility of an ascorbate-deficient mutant of Arabidopsis to high-light stress

Title:

Susceptibility of an ascorbate-deficient mutant of Arabidopsis to high-light stress

Creator:

Zeng, L.-D., Li, M., Chow, W. S., and Peng, C.-L.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:20046f6f-1bca-446a-bbc4-346b4ba02024
uuid:20046f6f-1bca-446a-bbc4-346b4ba02024
issn:0300-3604
doi:10.1007/s11099-017-0759-3

Subject:

huseníček rolní, kyselina askorbová, Arabidopsis thaliana, ascorbic acid, high-light stress, chlorophyll fluorescence, reactive oxygen species, 2, and 581

Type:

model:article and TEXT

Format:

print, bez média, and svazek

Description:

Ascorbate is an important antioxidant involved in both enzymatic and nonenzymatic reactions in plant cells. To reveal the function of ascorbate associated with defense against photo-oxidative damage, responses of the ascorbate-deficient mutant vtc2-1 of Arabidopsis thaliana to high-light stress were investigated. After high-light treatment at 1,600 μmol(photon) m-2 s-1 for 8 h, the vtc2-1 mutant exhibited visible photo-oxidative damage. The total ascorbate content was lower, whereas accumulation of H2O2 was higher in the vtc2-1 mutant than that in the wild type. The chlorophyll (Chl) content and PSII Chl fluorescence parameters, such as maximal quantum yield of PSII photochemistry, yield, and electron transport rate, in vtc2-1 mutant decreased more than that in the wild type, whereas the nonphotochemical quenching coefficient increased more in the wild type than that in vtc2-1 mutant. Therefore, the vtc2-1 mutant was more sensitive to high-light stress than the wild type. Accumulation of reactive oxygen species was mainly responsible for the damage of PSII in the vtc2-1 mutant under high light. The results indicate that ascorbate plays a critical role in maintaining normal photosynthetic function in plants under high-light stress., L.-D. Zeng, M. Li, W. S. Chow, C.-L. Peng., and Obsahuje bibliografické odkazy

Language:

Multiple languages

Rights:

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

Coverage:

427-432

Source:

Photosynthetica | 2018 Volume:56 | Number:1

Harvested from:

CDK

Metadata only:

false