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Salt tolerance of barley induced by the root endophyte Piriformospora indicais associated with a strong increase in antioxidants

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Baltruschat, Helmut, Fodor, József, Harrach, Borbála D., Niemczyk, Elżbieta, Barna, Balázs, Gullner, Gábor, Janeczko, Anna, Kogel, Karl-Heinz, Schäfer, Patrick, Schwarczinger, Ildikó, Zuccaro, Alga and Skoczowski, Andrzej (2008) Salt tolerance of barley induced by the root endophyte Piriformospora indicais associated with a strong increase in antioxidants. New Phytologist, Volume 180 (Number 2). pp. 501-510. doi:10.1111/j.1469-8137.2008.02583.x

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Official URL: http://dx.doi.org/10.1111/j.1469-8137.2008.02583.x

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Abstract

The root endophytic basidiomycete Piriformospora indica has been shown to increase resistance against biotic stress and tolerance to abiotic stress in many plants.

Biochemical mechanisms underlying P. indica-mediated salt tolerance were studied in barley (Hordeum vulgare) with special focus on antioxidants. Physiological markers for salt stress, such as metabolic activity, fatty acid composition, lipid peroxidation, ascorbate concentration and activities of catalase, ascorbate peroxidase, dehydroascorbate reductase, monodehydroascorbate reductase and glutathione reductase enzymes were assessed.

Root colonization by P. indica increased plant growth and attenuated the NaCl-induced lipid peroxidation, metabolic heat efflux and fatty acid desaturation in leaves of the salt-sensitive barley cultivar Ingrid. The endophyte significantly elevated the amount of ascorbic acid and increased the activities of antioxidant enzymes in barley roots under salt stress conditions. Likewise, a sustained up-regulation of the antioxidative system was demonstrated in NaCl-treated roots of the salt-tolerant barley cultivar California Mariout, irrespective of plant colonization by P. indica.

These findings suggest that antioxidants might play a role in both inherited and endophyte-mediated plant tolerance to salinity.

Item Type: Journal Article
Divisions: Faculty of Science > Life Sciences (2010- )
Journal or Publication Title: New Phytologist
Publisher: John Wiley & Sons Ltd.
ISSN: 0028646X
Official Date: 2008
Dates:
DateEvent
2008Published
Volume: Volume 180
Number: Number 2
Page Range: pp. 501-510
DOI: 10.1111/j.1469-8137.2008.02583.x
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access

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