INVESTIGADORES
RUIZ oscar Adolfo
artículos
Título:
Alleviation of salt stress in Lotus glaber by Glomus intraradices
Autor/es:
SANNAZZARO ANALÍA, RUIZ OSCAR A, ALBERTÓ EDGARDO & MENÉNDEZ ANA
Revista:
PLANT AND SOIL
Referencias:
Año: 2006 vol. 285 p. 279 - 287
ISSN:
0032-079X
Resumen:
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. Experiment was performed using rooted L. glaber stem cuttings derived from L. glaber individuals recovered from saline lowlands. 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 contents 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+ contents in roots observed in this work could be part of the general mechanism of salt stress alleviation of L. glaber by G. intraradices