These authors contributed equally to this work.
Salt tolerance of barley induced by the root endophyte Piriformospora indica is associated with a strong increase in antioxidants
Article first published online: 4 AUG 2008
© The Authors (2008). Journal compilation © New Phytologist (2008)
Volume 180, Issue 2, pages 501–510, October 2008
How to Cite
Baltruschat, H., Fodor, J., Harrach, B. D., Niemczyk, E., Barna, B., Gullner, G., Janeczko, A., Kogel, K.-H., Schäfer, P., Schwarczinger, I., Zuccaro, A. and Skoczowski, A. (2008), Salt tolerance of barley induced by the root endophyte Piriformospora indica is associated with a strong increase in antioxidants. New Phytologist, 180: 501–510. doi: 10.1111/j.1469-8137.2008.02583.x
- Issue published online: 25 SEP 2008
- Article first published online: 4 AUG 2008
- Received: 14 April 2008Accepted: 11 June 2008
- antioxidant enzymes;
- ascorbic acid;
- ethane release;
- fatty acid unsaturation;
- Hordeum vulgare (barley);
- Piriformospora indica;
- salt stress
- • 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.