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Alleviation of salt stress in Lotus glaber by Glomus intraradices

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Abstract

Lotus glaber is a glycophytic, perennial legume from Europe that occurs widely in saline habitats. We evaluated the effect of mycorrhizal fungus colonization on the response to salt stress of two genotypes of L. glaber differing in their tolerance to salinity. The experiment consisted of a randomized block design with two factors: (1) mycorrhizal fungus treatments (with or without AM fungus) and (2) two salinity levels of 0 and 200 mM NaCl. Our results indicated that Glomus intraradices established a more efficient symbiosis with the tolerant than with the sensitive genotype. G. intraradices improved growth of L. glaber plants under saline conditions. They showed higher values of net growth, shoot/root and K+/Na+ ratios, and protein concentrations than controls. Tolerant AM plants also showed higher chlorophyll levels than non-AM ones. Prevention of Na+ accumulation in the plant and enhancement of K+ concentrations in roots observed in this work could be part of the general mechanism of salt stress alleviation of L. glaber by G. intraradices.

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Acknowledgements

This work was supported by grants from the Consejo Nacional de Investigaciones Cienfíficas y Técnicas (CONICET, Argentina), the Agencia Nacional de Promoción Científica y Tecnológica (PICT 14194), the EU-INCO Lotassa Project, Comisión de Investigación Científica (CIC), The Iberoamerican network for biofertilizers Biofag (CYTED). A.I.S is a CONICET fellow, A.B.M. is a researcher of the Universidad de Buenos Aires (UBA) and CONICET. O.A.R. and E.O.A. are members of the research committee of CONICET.

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  1. University of Buenos Aires, Buenos Aires, Argentina

    Analía I Sannazzaro, Oscar A Ruiz, Edgardo O Albertó & Ana Bernardina Menéndez

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  1. Analía I Sannazzaro
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  2. Oscar A Ruiz
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  3. Edgardo O Albertó
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  4. Ana Bernardina Menéndez
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Correspondence to Ana Bernardina Menéndez.

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Sannazzaro, A., Ruiz, O.A., Albertó, E.O. et al. Alleviation of salt stress in Lotus glaber by Glomus intraradices . Plant Soil 285, 279–287 (2006). https://doi.org/10.1007/s11104-006-9015-5

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