English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/97858
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Title

Photoprotection processes under water stress and recovery in Mediterranean plants with different growth forms and leaf habits

AuthorsGalmés, Jeroni; Abadía Bayona, Javier ; Cifré, Josep; Medrano Gil, Hipólito ; Flexas, Jaume
KeywordsPhotoprotection processes
Photorespiration rates
Stomatal conductance, Water stress
Deepoxidation
Issue Date2007
PublisherBlackwell Publishing
CitationPhysiologia Plantarum 130 (4): 495-510 (2007)
AbstractThe response of photoprotection mechanisms to a short-term water stress period followed by rewatering, to simulate common episodic water stress periods occurring in Mediterranean areas, was studied in 10 potted plants representative of different growth forms and leaf habits. During water stress and recovery, relative water content, stomatal conductance, leaf pigment composition, electron transport rates, maximum quantum efficiency of PSII photochemistry (F v/Fm), thermal energy dissipation and photorespiration rates (Pr) were determined. All the species analyzed proved to be strongly resistant to photoinactivation of PSII under the imposed water stress conditions. The responses of the analyzed parameters did not differ largely among species, suggesting that Mediterranean plants have similar needs and capacity for photoprotection under episodic water stress periods regardless of their growth form and leaf habit. A general pattern of photoprotection emerged, consisting in maintenance or increase of Pr at mild stress and the increase of the thermal energy dissipation at more severe stress. Adjustments in pigment pool sizes were not an important short-term response to water stress. The increase of thermal energy dissipation because of water stress depended mostly on the de-epoxidation state of xanthophylls, although the slope and kinetics of such relationship strongly differed among species, suggesting species-dependent additional roles of de-epoxidated xanthophylls. Also, small decreases in Fv/Fm at predawn during water stress were strongly correlated with maintained de-epoxidation of the xanthophylls cycle, suggesting that a form of xanthophyll-dependent sustained photoprotection was developed during short-term water stress not only in evergreen but also in semideciduous and annual species.
URIhttp://hdl.handle.net/10261/97858
DOI10.1111/j.1399-3054.2007.00919.x
Identifiersdoi: 10.1111/j.1399-3054.2007.00919.x
issn: 0031-9317
Appears in Collections:(EEAD) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


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