Role of the reversible xanthophyll cycle in the photosystem II damage and repair cycle in Dunaliella salina SCIE SCOPUS

DC Field Value Language
dc.contributor.author Jin, ES -
dc.contributor.author Yokthongwattana, K -
dc.contributor.author Polle, JEW -
dc.contributor.author Melis, A -
dc.date.accessioned 2020-04-21T06:25:38Z -
dc.date.available 2020-04-21T06:25:38Z -
dc.date.created 2020-02-04 -
dc.date.issued 2003-05 -
dc.identifier.issn 0032-0889 -
dc.identifier.uri https://sciwatch.kiost.ac.kr/handle/2020.kiost/5509 -
dc.description.abstract The Dunaliella salina photosynthetic apparatus organization and function was investigated in wild type (WT) and a mutant (zea1) lacking all beta,beta-epoxycarotenoids derived from zeaxanthin (Z). The zeal mutant lacked antheraxanthin, violaxanthin, and neoxanthin from its thylakoid membranes but constitutively accumulated Z instead. It also lacked the so-called xanthophyll cycle, which, upon irradiance stress, reversibly converts violaxanthin to Z via a de-epoxidation reaction. Despite the pronounced difference observed in the composition of beta,beta-epoxycarotenoids between WT and zea1, no discernible difference could be observed between the two strains in terms of growth, photosynthesis, organization of the photosynthetic apparatus, photo-acclimation, sensitivity to photodamage, or recovery from photo-inhibition. WT and zeal were probed for the above parameters over a broad range of growth irradiance and upon light shift experiments (low light to high light shift and vice versa). A constitutive accumulation of Z in the zeal strain did not affect the acclimation of the photosynthetic apparatus to irradiance, as evidenced by indistinguishable irradiance-dependent adjustments in the chlorophyll antenna size and photosystem content of WT and zeal strain. In addition, a constitutive accumulation of Z in the zeal strain did not affect rates of photodamage or the recovery of the photosynthetic apparatus from photo-inhibition. However, Z in the WT accumulated in parallel with the accumulation of photodamaged PSII centers in the chloroplast thylakoids and decayed in tandem with a chloroplast recovery from photo-inhibition. These results suggest a role for Z in the protection of photodamaged and disassembled PSII reaction centers, apparently needed while PSII is in the process of degradation and replacement of the D1/32-kD reaction center protein. -
dc.description.uri 1 -
dc.language English -
dc.publisher AMER SOC PLANT BIOLOGISTS -
dc.subject GREEN-ALGA DUNALIELLA -
dc.subject LIGHT-HARVESTING COMPLEX -
dc.subject CHLOROPHYLL ANTENNA SIZE -
dc.subject VIOLAXANTHIN DE-EPOXIDASE -
dc.subject ARABIDOPSIS-THALIANA -
dc.subject HIGHER-PLANTS -
dc.subject IRRADIANCE-STRESS -
dc.subject BETA-CAROTENE -
dc.subject IN-VIVO -
dc.subject PHOTOSYNTHETIC APPARATUS -
dc.title Role of the reversible xanthophyll cycle in the photosystem II damage and repair cycle in Dunaliella salina -
dc.type Article -
dc.citation.endPage 364 -
dc.citation.startPage 352 -
dc.citation.title PLANT PHYSIOLOGY -
dc.citation.volume 132 -
dc.citation.number 1 -
dc.identifier.bibliographicCitation PLANT PHYSIOLOGY, v.132, no.1, pp.352 - 364 -
dc.identifier.doi 10.1104/pp.102.019620 -
dc.identifier.wosid 000185076500038 -
dc.type.docType Article -
dc.description.journalClass 1 -
dc.subject.keywordPlus GREEN-ALGA DUNALIELLA -
dc.subject.keywordPlus LIGHT-HARVESTING COMPLEX -
dc.subject.keywordPlus CHLOROPHYLL ANTENNA SIZE -
dc.subject.keywordPlus VIOLAXANTHIN DE-EPOXIDASE -
dc.subject.keywordPlus ARABIDOPSIS-THALIANA -
dc.subject.keywordPlus HIGHER-PLANTS -
dc.subject.keywordPlus IRRADIANCE-STRESS -
dc.subject.keywordPlus BETA-CAROTENE -
dc.subject.keywordPlus IN-VIVO -
dc.subject.keywordPlus PHOTOSYNTHETIC APPARATUS -
dc.relation.journalWebOfScienceCategory Plant Sciences -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.relation.journalResearchArea Plant Sciences -
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