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Publication Type J
Authors Cambrolle, J., S. Redondo-Gomez, E. Mateos-Naranjo, T. Luque and M. E. Figueroa
Title Physiological responses to salinity in the yellow-horned poppy, Glaucium flavum
Source Plant Physiology and Biochemistry
Author Keywords Glaucium flavum Growth rate Nutrient status Photosynthesis Photosystem II Salinity salt tolerance chlorophyll fluorescence photosynthetic responses extreme halophyte plants growth calcium stress water photoinhibition
Abstract Glaucium flavum Crantz. is a short-lived perennial herb found in coastal habitats in southern Spain growing under a wide range of interstitial soil salinity levels, from that of fresh water up to the high concentration typical of sea water. An experiment was designed to investigate the effect of exposure to this range of salinity on the photosynthetic apparatus, growth and reproduction of G. flavum, by measuring relative growth rate, percentage of dead leaves, seed production, leaf relative water content, chlorophyll fluorescence parameters, gas exchange and photosynthetic pigment concentrations. We also determined total sodium, potassium, calcium, magnesium, and nitrogen concentrations. G. flavum survived at NaCl concentrations as high as 300 mM, although the excess of NaCl resulted in a biomass reduction of between 26 and 76% (in 60 and 300 mM NaCl treatments, respectively). The long-term effects of salinity on the growth and reproduction of G. flavum were mainly linked to an overall reduction in carbon gain as a result of stomatal conductance regulation. Also, the excess of salt caused a reduction in pigment concentrations, as well as Ca-, Mg- and N-uptake. The results indicate that, in the presence of excess soil-water salinity, G. flavum sustains little overall effects on the photochemical (PSII) apparatus, and is capable of tolerating a very high and continued exposure to salinity by maintaining low levels of net photosynthesis. (C) 2010 Elsevier Masson SAS. All rights reserved.
Author Address [Cambrolle, Jesus; Redondo-Gomez, Susana; Mateos-Naranjo, Enrique; Luque, Teresa; Enrique Figueroa, Manuel] Univ Seville, Dept Biol Vegetal & Ecol, Fac Biol, E-41080 Seville, Spain. Cambrolle, J, Univ Seville, Dept Biol Vegetal & Ecol, Fac Biol, Apartado 1095,Av Reina Mercedes 6, E-41080 Seville, Spain. cambrolle@us.es
ISSN 0981-9428
ISBN 0981-9428
29-Character Source Abbreviation Plant Physiol. Biochem.
Publication Date Feb
Year Published 2011
Volume 49
Issue 2
Beginning Page 186-194
Digital Object Identifier (DOI) 10.1016/j.plaphy.2010.11.008
Unique Article Identifier ISI:000287716400010
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