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

Zeng, L.-D.; Li, M; Chow, Wah S; Peng, C L

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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...[Show more]

dc.contributor.authorZeng, L.-D.
dc.contributor.authorLi, M
dc.contributor.authorChow, Wah S
dc.contributor.authorPeng, C L
dc.date.accessioned2019-11-25T23:23:46Z
dc.identifier.issn0300-3604
dc.identifier.urihttp://hdl.handle.net/1885/186619
dc.description.abstractAscorbate 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.
dc.description.sponsorshipThis work was supported by National Natural Science Foundation of China (31570398, 31270287), the key project of Guangdong Province Natural Science Foundation 2015A030311023.
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherSpringer Verlag
dc.rights© 2018 Springer
dc.sourcePhotosynthetica
dc.titleSusceptibility of an ascorbate-deficient mutant of Arabidopsis to high-light stress
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume56
dc.date.issued2018
local.identifier.absfor060705 - Plant Physiology
local.identifier.ariespublicationu4956746xPUB724
local.publisher.urlhttps://link.springer.com
local.type.statusPublished Version
local.contributor.affiliationZeng, L.-D., South China Normal University
local.contributor.affiliationLi, M, South China Normal University
local.contributor.affiliationChow, Wah S (Fred), College of Science, ANU
local.contributor.affiliationPeng, C L , South China Normal University
local.description.embargo2037-12-31
local.bibliographicCitation.issue1
local.bibliographicCitation.startpage427
local.bibliographicCitation.lastpage432
local.identifier.doi10.1007/s11099-017-0759-3
local.identifier.absseo829999 - Plant Production and Plant Primary Products not elsewhere classified
dc.date.updated2019-05-19T08:23:14Z
local.identifier.scopusID2-s2.0-85030103914
CollectionsANU Research Publications

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