Characterization of salt-tolerance mechanisms in mycorrhizal (Claroideoglomus etunicatum) halophytic grass, Puccinellia distans

• Autorzy: Dashtebani F. , Hajiboland R. , Aliasgharzad N.
• Języki publikacji: EN

Abstrakty

EN

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.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2014
• Tom: 36
• Numer: 07
• Opis fizyczny: p.1713-1726,fig.,ref.

Twórcy

autor

Dashtebani F.

• Plant Science Department, Unievrsity of Tabriz, 51666-14779 Tabriz, Iran

autor

Hajiboland R.

• Plant Science Department, Unievrsity of Tabriz, 51666-14779 Tabriz, Iran
• Center of Excellence for Biodiversity, Faculty of Natural Sciences, University of Tabriz, 51666-14779 Tabriz, Iran

autor

Aliasgharzad N.

• Soil Science Department, University of Tabriz, 51666-14779 Tabriz, Iran

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Identyfikatory

DOI

10.1007/s11738-014-1546-4