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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Asensi-Fabado, María Amparo Cela, Jana Müller, Maren Arrom, Laia Chang, Caren Munné-Bosch, Sergi |
| Description | Country affiliation: Spain Author Affiliation: Asensi-Fabado MA ( Departament de Biologia Vegetal, Universitat de Barcelona, Avinguda Diagonal 645, 08028 Barcelona, Spain.) |
| Abstract | To better understand the role of ethylene signaling in plant stress tolerance, salt-induced changes in gene expression levels of ethylene biosynthesis, perception and signaling genes were measured in Arabidopsis thaliana plants exposed to 15 days of salinity. Among the genes analyzed, EIN3 showed the highest expression level increase under salt stress, suggesting a key role for this ethylene-signaling component in response to salt stress. Therefore, we analyzed the salt stress response over 15 days (by adding 100 mM NaCl to the nutrient solution) in the ein3-1 mutant compared to the wild-type (Col-0) in terms of growth, oxidative stress markers (lipid peroxidation, foliar pigments and low-molecular-weight antioxidants) and levels of growth- and stress-related phytohormones (including cytokinins, auxins, gibberellins, abscisic acid, jasmonic acid and salicylic acid). The ein3-1 mutant grew similarly to wild-type plants both under control and salt stress conditions, which was associated with a differential time course evolution in the levels of the cytokinins zeatin and zeatin riboside, and the auxin indole-3-acetic acid between the ein3-1 mutant and the wild-type. Despite showing no signs of physiological deterioration under salt stress (in terms of rosette biomass, leaf water and pigment contents, and PSII efficiency) the ein3-1 mutant showed enhanced lipid peroxidation under salt stress, as indicated by 2.4-fold increase in both malondialdehyde and jasmonic acid contents compared to the wild-type. We conclude that, at moderate doses of salinity, partial insensitivity to ethylene might be compensated by changes in endogenous levels of other phytohormones and lipid peroxidation-derived signals in the ein3-1 mutant exposed to salt stress, but at the same time, this mutant shows higher oxidative stress under salinity than the wild-type. |
| File Format | HTM / HTML |
| ISSN | 01761617 |
| Issue Number | 4 |
| Volume Number | 169 |
| e-ISSN | 16181328 |
| Journal | Journal of Plant Physiology |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2012-03-01 |
| Publisher Place | Germany |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Botany Arabidopsis Proteins Genetics Arabidopsis Physiology Gene Expression Regulation, Plant Drug Effects Nuclear Proteins Oxidative Stress Plant Growth Regulators Metabolism Sodium Chloride Toxicity Transcription Factors Antioxidants Growth & Development Biomass Chlorophyll Cyclopentanes Ethylenes Indoleacetic Acids Lipid Peroxidation Malondialdehyde Mutation Oxylipins Plant Leaves Seedling Signal Transduction Water Journal Article Research Support, Non-u.s. Gov't Research Support, U.s. Gov't, Non-p.h.s. |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physiology Plant Science Agronomy and Crop Science |
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