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Abundance of arbuscular mycorrhizal fungi in relation to soil salinity around Lake Urmia in northern Iran analyzed by use of lipid biomarkers and microscopy

Author:
  • Mohsen Barin
  • Nasser Aliasgharzad
  • Pål Axel Olsson
  • MirHassan Rasouli-Sadaghiani
  • Mohammad Moghddam
Publishing year: 2013
Language: English
Pages: 225-232
Publication/Series: Pedobiologia
Volume: 56
Issue: 4-6
Document type: Journal article
Publisher: Elsevier

Abstract english

Saline soils around Lake Urmia in northern Iran constitute a stressed environment for plants and microbial communities, including arbuscular mycorrhizal (AM) fungi. Soil and root samples were collected from fields cultivated with the glycophytes Allium cepa L. and Medicago sativa L, and sites dominated by the halophyte Salicornia europaea L. Soil and root samples were analyzed for the AM fungal signature neutral lipid fatty acid (NLFA) 16:1 omega 5. The roots were also examined microscopically for mycorrhizal colonization. Each plant species was sampled across a salt gradient. Microscopic examination showed no AM fungal structures in the roots of S. europaea. The highest root colonization was recorded for M. sativa. The highest NLFA 16:1 omega 5 values were found in soil around M. sativa roots and the lowest in soil around S. europaea roots. We found evidence for stimulation of vesicle formation at moderate salinity levels in M. sativa, which is an indication of increased carbon allocation to mycorrhiza. On the other hand, we found a negative correlation between salinity and arbuscule formation in A. cepa, which may indicate a less functional symbiosis in saline soils. (C) 2013 Elsevier GmbH. All rights reserved.

Keywords

  • Ecology
  • Fatty acids
  • NLFA
  • PLFA
  • Mycorrhizal symbiosis
  • Salinity
  • Soil
  • properties

Other

Published
  • ISSN: 1873-1511
Pål Axel Olsson
E-mail: pal_axel [dot] olsson [at] biol [dot] lu [dot] se

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Biodiversity

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Plant Biology

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