INVESTIGADORES
LAGORIO MarÍa Gabriela
artículos
Título:
Assessment of the role of fluorescent root and seed exudates in crop plants
Autor/es:
YARYURA, P; CORDON, G.; LEÓN, M.; KERBER, N.; PUCHEU, N.; LAGORIO, M.G.; RUBIO, G.; VIVANCO, J.; GARCÍA, A.
Revista:
JOURNAL OF PLANT NUTRITION
Editorial:
TAYLOR & FRANCIS INC
Referencias:
Año: 2013 p. 811 - 824
ISSN:
0190-4167
Resumen:
Fluorescent compounds have been reported in plant leaves, having an important
biological role in the protection towards UV irradiation. It is also known that stress
conditions in plants stimulate the production of some of these compounds in their aerial
portion. However, much less is known about their production by roots or seeds and their
presence in the soil surrounding them.
We report here that, soybean, sunflowers and rapeseed pr 25 oduced fluorescent seed and root exudates. Phosphorus deficiency in rapeseed stimulate the excretion of fluorescent compounds by roots, mainly chlorogenic acid and scopoletin.
When we tested the effect of the fluorescent fraction from soybean seed exudates on
Macrophomina phaseolina, we observed an enhanced induction of sclerotia formation, hyphal squeezing and lysis in the mycelium. The fluorescent compounds and perhaps other chemical molecules also present in exudates might constitute a transitory defense barrier against early attack by pathogens.