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Publication Type J
Authors Bueno, M., M. L. Lendinez, J. Calero and M. D. Cordovilla
Title Salinity responses of three halophytes from inland saltmarshes of Jaen (southern Spain)
Source Flora
Author Keywords Growth Ion content Phenols Polyamines Proline Salt stress atriplex-prostrata coastal population extreme halophyte oxidative stress polyamine levels tolerance growth proline plant accumulation
Abstract Soil analyses of three saltmarshes in Jaen province (southern Spain) indicated Sodic Solonchack type for Don Benito saltmarsh, and Sodic Calcixerepts for Barranco Hondo and Brujuelo saltmarshes. Three halophytes (Frankenia pulverulenta, Atriplex prostrata, and Plantago coronopus) from these saltmarshes were submitted to long (21 days) and gradual (0, 100, 200, and 300mM NaCl) salinity stress, under hydroponic culture. The results of fresh mass, dry mass, root:shoot ratio, leaf water content, ion content, proline, total phenols, and polyamines (putrescine, spermidine, spermine and cadaverine) were examined to investigate the species' responses to saline stress. Maximum biomass production and leaf water content was found between 100 and 200mM NaCl in F. pulverulenta and at 100mM NaCl in A. prostrata, while a decrease of these parameters was registered in P. coronopus as the salt concentration and salt-exposure time increased. In leaves, Na+ and Cl- accumulation increased with salt concomitant with a reduction of K+ in plants with salt excretion mechanisms (F. pulverulenta and A. prostrata), while high levels of ions were found with and without salt in P. coronopus. For osmotic adjustment, proline content proved important in F. pulverulenta and A. prostrata, while in P. coronopus this osmolyte decreased with salt, while phenols and polyamines increased in all three species. The highest levels in (Spermidine+ Spermine): Putrescine ratio was related to the more salt-tolerant species. These results appear to indicate various adaptation responses to salinity. Rising levels of proline, phenols, and polyamines were related to better growth, which could contribute to different degree of tolerance and distribution of these species in saltmarshes.
ISSN 0367-2530
ISBN 0367-2530
29-Character Source Abbreviation Flora
Publication Date May
Year Published 2020
Volume 266
Digital Object Identifier (DOI) 10.1016/j.flora.2020.151589
Unique Article Identifier WOS:000535714500006
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