Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/31392
Share/Export:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Title

Restoration of photosystem II photochemistry and carbon assimilation and related changes in chlorophyll and protein contents during the rehydration of desiccated Xerophyta scabrida leaves.

AuthorsPérez Pérez, Pilar CSIC ORCID; Rabnecz, G.; Laufer, Z.; Gutiérrez del Pozo, Diego CSIC; Tuba, Z.; Martínez-Carrasco, Rafael CSIC ORCID
KeywordsChlorophyll fluorescence
Desiccation tolerance
Non-photochemical quenching
Photosynthesis
Poikilochlorophylly
Relative water content
Rubisco
Xerophyta scabrida
Issue Date2011
PublisherOxford University Press
CitationJournal of Experimental Botany, Vol. 62, No. 3, pp. 895–905, 2011
AbstractRecovery of photosynthesis in rehydrating desiccated leaves of the poikilochlorophyllous desiccation-tolerant plant Xerophyta scabrida was investigated. Detached leaves were remoistened under 12 h light/dark cycles for 96 h. Water, chlorophyll (Chl), and protein contents, Chl fluorescence, photosynthesis–CO2 concentration response, and the amount and activity of Rubisco were measured at intervals during the rehydration period. Leaf relative water contents reached 87% in 12 h and full turgor in 96 h. Chl synthesis was slower before than after 24 h, and Chla:Chlb ratios changed from 0.13 to 2.6 in 48 h. The maximum quantum efficiency recovered faster during rehydration than the photosystem II operating efficiency and the efficiency factor, which is known to depend mainly on the use of the electron transport chain products. From 24 h to 96 h of rehydration, net carbon fixation was Rubisco limited, rather than electron transport limited. Total Rubisco activity increased during rehydration more than the Rubisco protein content. Desiccated leaves contained, in a close to functional state, more than half the amount of the Rubisco protein present in rehydrated leaves. The results suggest that in X. scabrida leaves Rubisco adopts a special, protective conformation and recovers its activity during rehydration through modifications in redox status.
DescriptionArtículo: Open access
Publisher version (URL)http://jxb.oxfordjournals.org/content/62/3/895.full.pdf+html
URI10261/31392
DOI10.1093/jxb/erq317
ISSN0022-0957
E-ISSN1460-2431
Appears in Collections:(IRNASA) Artículos

Files in This Item:
File Description SizeFormat
OPEN ACCESS.doc19,5 kBMicrosoft WordView/Open
Show full item record
Review this work

PubMed Central
Citations

3
checked on May 14, 2022

SCOPUSTM   
Citations

12
checked on May 15, 2022

WEB OF SCIENCETM
Citations

12
checked on May 20, 2022

Page view(s)

244
checked on May 20, 2022

Download(s)

68
checked on May 20, 2022

Google ScholarTM

Check

Altmetric

Dimensions


Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.