INVESTIGADORES
LAGORIO MarÍa Gabriela
congresos y reuniones científicas
Título:
PHOSPHORUS DEFICIENCY AND FLUORESCENT COMPOUNDS EXCRETED BY ROOTS AND SEEDS EXUDATES IN CROP PLANTS
Autor/es:
YARYURA, P.M.; CORDÓN, G.B.; LEÓN, M.; KERBER, N.L.; PUCHEU, N.L.; LAGORIO, M.G.; RUBIO, G.; GARCÍA, A. F.
Lugar:
Tucumán, Argentina
Reunión:
Congreso; XLV Reunión Anual de La Sociedad Argentina de Investigación; 2009
Institución organizadora:
Sociedad Argentina de Investigación en Bioquímica y Biología Molecular
Resumen:
Confirming some previous results we show here that by inducing
a stress condition (phosphorus shortage) some crops increase
their excretion of fluorescent compounds in root exudates. In our
experiments rapeseed plants entered into phosphorus shortage
well before sunflower and soybean plants, which could be
attributed to the seed size that limits the amount of phosphorus
reserves in the seed. Chlorogenic acid is notoriously increased
as well as scopoletin in rapeseed plant grown under phosphorus
deficiency. Looking for a possible role for these secondary
metabolites we tested the effect of root and seed exudates on
the growth pattern induced on fungal growth. We observed the
maximum induction of sclerotia formation with soybean seed
exudates in Macrophomina phaseolina, although in our in vitro
schemes the fungi finally overcame this condition and grew. It is
as if both and inducer of sclerotia and an inducer of myceliar
growth were both present in exudates, the effect of the latter
somehow overriding the former. Distracting energy equivalents
from a normal growing mycelium, inducing the formation of
resistance structures like sclerotia, might be an opportunity to
retard fungal invasion under a condition of extreme plant
weakness.
schemes the fungi finally overcame this condition and grew. It is
as if both and inducer of sclerotia and an inducer of myceliar
growth were both present in exudates, the effect of the latter
somehow overriding the former. Distracting energy equivalents
from a normal growing mycelium, inducing the formation of
resistance structures like sclerotia, might be an opportunity to
retard fungal invasion under a condition of extreme plant
weakness.
schemes the fungi finally overcame this condition and grew. It is
as if both and inducer of sclerotia and an inducer of myceliar
growth were both present in exudates, the effect of the latter
somehow overriding the former. Distracting energy equivalents
from a normal growing mycelium, inducing the formation of
resistance structures like sclerotia, might be an opportunity to
retard fungal invasion under a condition of extreme plant
weakness.
Macrophomina phaseolina, although in our in vitro
schemes the fungi finally overcame this condition and grew. It is
as if both and inducer of sclerotia and an inducer of myceliar
growth were both present in exudates, the effect of the latter
somehow overriding the former. Distracting energy equivalents
from a normal growing mycelium, inducing the formation of
resistance structures like sclerotia, might be an opportunity to
retard fungal invasion under a condition of extreme plant
weakness.