Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/19777
Share/Export:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Title

Different blocking effect of HgCl2 and NaCl on Aquaporins of pepper roots.

AuthorsMartínez-Ballesta, M. Carmen CSIC ORCID; Diaz, Rafael; Martínez, Vicente CSIC ORCID; Carvajal, Micaela CSIC ORCID
KeywordsAquaporins
Mercuric chloride
Pepper plants
Stomatal conductance
Root hydraulic conductivity
Salinity
Turgor potential
Issue Date2003
PublisherElsevier
CitationJournal of Plant Physiology 160(12): 1487-1492 (2003)
AbstractIn this study we have compared the short-term effects of both NaCl and HgCl2 on aquaporins of Capsicum annuum L. plants, in order to determine whether or not they are similar. Stomatal conductance, turgor, root hydraulic conductance and water status were measured after 0.5, 2, 4 and 6 h of NaCl (60 mmol/L) or HgCl2 (50 μmol/L) treatment. When 60 mmol/L NaCl was added to the nutrient solution, a large decrease in stomatal conductance was observed after 2 h. However, when HgCl2 (50 μmol/L) was added, the decrease occurred after 4 h. The number of open stomata closed was always lower in plants treated with HgCl2 than in plants treated with NaCl. The water content of the Hg2+-treated plants was decreased, compared with controls and NaCl-treated. The root hydraulic conductance decreased after HgCl2 and NaCl treatment plants. Turgor of leaf epidermal cells was greatly reduced in plants treated with HgCl2, but remained constant in the NaCl treatment, compared with control plants. The fact that the stomatal conductance was reduced more rapidly after NaCl addition, followed by the stomatal closure, and that both water content and turgor did not differ from the control suggests that in NaCl-treated plants there must be a signal moving from root to shoot. Therefore, the control of plant homeostasis through a combined regulation of root and stomatal exchanges may be dependent on aquaporin regulation.
Publisher version (URL)http://dx.doi.org/10.1078/0176-1617-01017
URIhttp://hdl.handle.net/10261/19777
DOI10.1078/0176-1617-01017
ISSN0020-0190
Appears in Collections:(CEBAS) Artículos

Show full item record
Review this work

SCOPUSTM   
Citations

22
checked on May 19, 2022

WEB OF SCIENCETM
Citations

21
checked on May 22, 2022

Page view(s)

445
checked on May 24, 2022

Google ScholarTM

Check

Altmetric

Dimensions


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