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Publication Type J
Authors Dashtebani, F., R. Hajiboland and N. Aliasgharzad
Title Characterization of salt-tolerance mechanisms in mycorrhizal (Claroideoglomus etunicatum) halophytic grass, Puccinellia distans
Source Acta Physiologiae Plantarum
Author Keywords Puccinellia distans Halophytes Arbuscular mycorrhizal fungus (AMF) Antioxidant defense Ion homeostasis Water relations glomus-intraradices molecular responses salinity tolerance drought stress soil-salinity fungi growth plants colonization photosynthesis
Abstract Responses of Puccinellia distans, a halophytic grass to low (50 mM) and high (200 mM) NaCl salinity, were studied in a sand culture experiment without or with inoculation by arbuscular mycorrhizal fungus (AMF), Claroideoglomus etunicatum isolated from its saline habitat. Plant biomass was not influenced by salinity levels, while a tendency to a higher biomass was observed in AMF plants under both control and saline conditions. Leaf photosynthesis increased by both salinity and AMF inoculation. Despite higher transpiration rate, AMF plants had higher water-use efficiency under sever saline conditions. AMF inoculation decreased proline concentration, but increased significantly leaf osmotic potential. Antioxidative enzymes responded differently to the salt and AMF treatments depending on the salt concentration and plant organ. Nonetheless, salt-induced malondialdehyde accumulation in the leaves diminished by AMF colonization. K and Ca contents were not affected by salt, while fungal colonization increased K in the roots and Ca in both leaves and roots. Our results indicated that enhancement of photosynthesis and ion homeostasis is involved in the tolerance of P. distans to both low and high salinity. AMF inoculation increased plants' tolerance by augmentation of the above mechanisms accompanied by improvement of water relations and protection against oxidative damage in the leaves.
Author Address [Dashtebani, Fereshteh; Hajiboland, Roghieh] Univ Tabriz, Dept Plant Sci, Tabriz 5166614779, Iran. [Hajiboland, Roghieh] Univ Tabriz, Fac Nat Sci, Ctr Excellence Biodivers, Tabriz 5166614779, Iran. [Aliasgharzad, Nasser] Univ Tabriz, Dept Soil Sci, Tabriz 5166614779, Iran. Hajiboland, R (reprint author), Univ Tabriz, Fac Nat Sci, Ctr Excellence Biodivers, Tabriz 5166614779, Iran. ehsan@tabrizu.ac.ir
ISSN 0137-5881
ISBN 0137-5881
29-Character Source Abbreviation Acta Physiol. Plant.
Publication Date Jul
Year Published 2014
Volume 36
Issue 7
Beginning Page 1713-1726
Digital Object Identifier (DOI) 10.1007/s11738-014-1546-4
Unique Article Identifier WOS:000338283200011
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