INVESTIGADORES
RUIZ Oscar Adolfo
congresos y reuniones científicas
Título:
Phenotypic plasticity with respect to salt stress response by Lotus glaber Mill.: the role of its AM-fungal and rhizobial symbionts.
Autor/es:
ECHEVERRÍA, L, SCAMBATO, A., SANNAZZARO A., MAIALE S., RUIZ O. A, MENÉNDEZ A.
Lugar:
Estoril (Portugal)
Reunión:
Congreso; I Congreso Luso Español de Fijación de Nitrógeno y XII Reunión Nacional de Fijación de Nitrógeno (España); 2008
Institución organizadora:
Sociedad Española de Fijación de Nitrógeno
Resumen:
Our hypothesis is that Lotus glaber (a glycophytic species, highly tolerant to saline-alkaline soils) displays a plastic root phenotypic response to soil salinity that may be influenced by mycorrhizal and rhizobial microorganisms. Uninoculated plants and plants colonized by Glomus intraradices or Mesorhizobium loti were exposed to either 150 or 0 mM NaCl. General plant growth and root architectural parameters (morphology and topology) were measured and phenotypic plasticity determined at the end of the salt treatment period. Root morphology of sensitive plants was greatly affected by salinity, whereas the fungus counteracted salinity effects. Root topology was not affected by salinity or by the interaction with AM fungus and it was increased by M. loti. Notwithstanding the absence of results linking observed topological indexes (TTs) and variations in plant growth, it is possible to predict a dissimilar adaptation of plants with different TTs.