INVESTIGADORES
OMACINI Marina
artículos
Título:
Glyphosate vulnerability explains changes in root-symbionts propagules viability in Pampean grasslands
Autor/es:
DRUILLE, M; CABELLO, M; GARCIA PARISI, PA; GOLLUSCIO, R; OMACINI M
Revista:
AGRICULTURE, ECOSYSTEMS AND ENVIRONMENT
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2015
ISSN:
0167-8809
Resumen:
Research
into the impact of agricultural practices on plant symbionts is
essential for understanding the factors that modulate plant community
productivity and diversity. Although glyphosate is used worldwide as an
herbicide, its effects on root symbionts under natural conditions have
not been sufficiently studied. We performed a field experiment to
evaluate the influence of glyphosate, used for promoting winter forage
production, on the viability of arbuscular mycorrhizal fungi (AMF) and
rhizobium propagules and other ecosystem traits in native grasslands.
The number of viable propagules was strongly reduced with a single
application at the recommended dose. Spore viability reduction was
dependent on AMF species. Furthermore, changes in plant community
composition and soil salinity were detected, which may eventually
influence these symbionts in the future. Considering the low nutrient
availability and high root-symbiont dependency of several species with
forage value, repeated applications might lead to a loss in the
grassland diversity and productivity, decreasing livestock production.
Application of sublethal doses of this herbicide could avoid these
damages, although success in increasing winter forage production would
be less. Our results are relevant for understanding the effects of
glyphosate on non-target species and designing sustainable land
management systems.