INVESTIGADORES
MARTINEZ NOËL Giselle Maria Astrid
congresos y reuniones científicas
Título:
TOR complex and Arabidopsis-pathogen interaction
Autor/es:
MARTÍNEZ NOËL G; CONSOLO F; AZNAR N; SALERNO G
Lugar:
Bs. As.
Reunión:
Congreso; 2013; 2013
Resumen:
TOR complex and
Arabidopsis-pathogen interaction
Martínez-Noël
G; Consolo VF, Aznar N and Salerno G.
Instituto de Investigaciones en
Biodiversidad y Biotecnología-CONICET, Mar del Plata, Argentina.
The TOR (Target Of Rapamycin) pathway is a major
controller of growth-related processes in eukaryotes. The plant TOR complex comprises
the TOR kinase, and the proteins Raptor and LST8. Under favorable environmental
conditions, the TOR pathway promotes growth and limits catabolic processes. There
must exist a balance between growth and disease resistance, thus TOR signaling
should be regulated in a biotic stress situation. We studied plant-pathogen
interactions in the model plant Arabidopsisthaliana, using mutants in different TOR
complex proteins. Plants of 25-d were sprayed with a fungus solution and evaluated
for 14-d. We assayed Fusarium graminearum
and Botrytis cinerea strains isolated
from Prov Bs As, two important pathogens that cause major agronomic crop losses.
We show that the mutant Raptor is tolerant to Fusarium whereas it was susceptible to Botrytis. In accordance, Fusarium-inoculated
Raptor plants do not present fungus growth or plant cell death. On the other
hand, LST8 mutant resulted susceptible to the infection of both fungi. Infection
of LST8 mutant with Botrytis was
slower than that of wt plants. Gene expression was analyzed in leaves up to 3-d
of treatment. Although additional experiments are needed, our results indicate that
the TOR signaling pathway could be involved in biotic stress response. Supported
by CONICET, ANPCyT, UNMdP and FIBA.