Linked Life Data

21239380

Source:http://linkedlifedata.com/resource/pubmed/id/21239380

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
8
pubmed:dateCreated
2011-5-17
pubmed:abstractText
In order to understand the role of cytosolic antioxidant enzymes in drought stress protection, transgenic tobacco (Nicotiana tabacum cv. Xanthi) plants overexpressing cytosolic Cu/Zn-superoxide dismutase (cytsod) (EC 1.15.1.1) or ascorbate peroxidase (cytapx) (EC 1.11.1.1) alone, or in combination, were produced and tested for tolerance against mild water stress. The results showed that the simultaneous overexpression of Cu/Znsod and apx or at least apx in the cytosol of transgenic tobacco plants alleviates, to some extent, the damage produced by water stress conditions. This was correlated with higher water use efficiency and better photosynthetic rates. In general, oxidative stress parameters, such as lipid peroxidation, electrolyte leakage, and H(2)O(2) levels, were higher in non-transformed plants than in transgenic lines, suggesting that, at the least, overexpression of cytapx protects tobacco membranes from water stress. In these conditions, the activity of other antioxidant enzymes was induced in transgenic lines at the subcellular level. Moreover, an increase in the activity of some antioxidant enzymes was also observed in the chloroplast of transgenic plants overexpressing cytsod and/or cytapx. These results suggest the positive influence of cytosolic antioxidant metabolism on the chloroplast and underline the complexity of the regulation network of plant antioxidant defences during drought stress.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
1460-2431
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
62
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2599-613
pubmed:dateRevised
2011-11-17
pubmed:meshHeading
pubmed-meshheading:21239380-Adaptation, Physiological, pubmed-meshheading:21239380-Agricultural Irrigation, pubmed-meshheading:21239380-Antioxidants, pubmed-meshheading:21239380-Ascorbate Peroxidases, pubmed-meshheading:21239380-Ascorbic Acid, pubmed-meshheading:21239380-Blotting, Southern, pubmed-meshheading:21239380-Chlorophyll, pubmed-meshheading:21239380-Cytosol, pubmed-meshheading:21239380-DNA, Bacterial, pubmed-meshheading:21239380-Droughts, pubmed-meshheading:21239380-Fluorescence, pubmed-meshheading:21239380-Gases, pubmed-meshheading:21239380-Glutathione, pubmed-meshheading:21239380-Oxidative Stress, pubmed-meshheading:21239380-Peroxidases, pubmed-meshheading:21239380-Photosynthesis, pubmed-meshheading:21239380-Plant Leaves, pubmed-meshheading:21239380-Plants, Genetically Modified, pubmed-meshheading:21239380-Stress, Physiological, pubmed-meshheading:21239380-Superoxide Dismutase, pubmed-meshheading:21239380-Tobacco, pubmed-meshheading:21239380-Transformation, Genetic
pubmed:year
2011
pubmed:articleTitle
Involvement of cytosolic ascorbate peroxidase and Cu/Zn-superoxide dismutase for improved tolerance against drought stress.
pubmed:affiliation
Laboratory of Plant Biotechnology, Ecology and Ecosystem Valorisation, Faculty of Sciences, University Chouaib Doukkali, 24000 El Jadida, Morocco.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't