IFEVA   02662
INSTITUTO DE INVESTIGACIONES FISIOLOGICAS Y ECOLOGICAS VINCULADAS A LA AGRICULTURA
Unidad Ejecutora - UE
artículos
Título:
Fluorescent compounds excreted by roots and seeds in crop plants
Autor/es:
YARYURA PABLO; CORDON GABRIELA; LEÓN MARIANA ; KERBER NORMA; PUCHEU NORMA; LAGORIO MA. GABRIELA ; RUBIO GERARDO; VIVANCO JORGE ; GARCÍA AUGUSTO
Revista:
JOURNAL OF PLANT NUTRITION
Editorial:
TAYLOR & FRANCIS INC
Referencias:
Lugar: Philadelphia; Año: 2013 vol. 36 p. 811 - 824
ISSN:
0190-4167
Resumen:
ABSTRACT 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 produced fluorescent seed and root exudates. Phosphorus deficiency in rapeseed stimulates 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.