English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/19774
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

Water relations and xylem transport of nutrients in pepper plants grown under two different salts.

AuthorsNavarro, Josefa M.; Garrido, Consuelo ; Martínez, Vicente ; Carvajal, Micaela
KeywordsChloride
Osmotic adjustment
Pepper
oot hydraulic conductance
Salinity
Sulphate
Water relations
Issue Date3-Nov-2003
PublisherSpringer
CitationPlant Growth Regulation 41(3): 237-245 (2003)
AbstractTwo iso-osmotic concentrations of NaCl and Na2SO4 were used for discriminating between the effects of specific ion toxicities of salt stress on pepper plants (Capsicum annuum L.) grown in hydroponic conditions, in a controlled-environment greenhouse. The two salts were applied to plants at different electrical conductivities, and leaf water relations, osmotic adjustment and root hydraulic conductance were measured. Leaf water potential (PSgrw), leaf osmotic potential (PSgro) and leaf turgor potential (PSgrp) decreased significantly when EC increased, but the decrease was less for NaCl- than for Na2SO4-treated plants. The reduction in stomatal conductance was higher for NaCl-treated plants. There were no differences in the effect of both treatments on the osmotic adjustment, and a reduction in root hydraulic conductance and the flux of solutes into the xylem was observed, except for the saline ions (Na+, Cl– and SO4 2–). Therefore, pepper growth decreased with increasing salinity because the plants were unable to adjust osmotically or because of the toxic effects of Cl–, SO4 2– and/or Na+. However, turgor of NaCl-treated plants was maintained at low EC (3 and 4 dS m–1) probably due to the maintenance of water transport into the plant (decrease of stomatal conductance), which, together with the lower concentration of Na+ in the plant tissues compared with the Na2SO4 treatment, could be the cause of the smaller decrease in growth.
Publisher version (URL)http://dx.doi.org/10.1023/B:GROW.0000007515.72795.c5
URIhttp://hdl.handle.net/10261/19774
DOI10.1023/B:GROW.0000007515.72795.c5
ISSN0039-7857
Appears in Collections:(CEBAS) Artículos
Files in This Item:
There are no files associated with this item.
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.