INVESTIGADORES
MAIALE Santiago Javier
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:
MARIELA ECHEVERRIA; AGUSTINA SCAMBATO; ANALIA SANNAZZARO; SANTIAGO MAIALE; OSCAR RUIZ; ANA MENENDEZ
Lugar:
Estoril
Reunión:
Congreso; I Congreso Luso Español de Fijación de Nitrógeno y XII Reunión Nacional de Fijación de Nitrógeno; 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.