INBA   12521
INSTITUTO DE INVESTIGACIONES EN BIOCIENCIAS AGRICOLAS Y AMBIENTALES
Unidad Ejecutora - UE
artículos
Título:
Positive interaction between mycorrhiza and foliar endophytes in a native grass.
Autor/es:
M. V. NOVAS; L. IANONE; D. CABRAL; A. M. GODEAS
Revista:
MYCOLOGICAL PROGRESS
Editorial:
SPRINGER HEIDELBERG
Referencias:
Año: 2009 vol. 8 p. 75 - 81
ISSN:
1617-416X
Resumen:
Abstract The interaction between mycorrhiza and leaf
endophytes (Neotyphodium sp.) was studied in three Poa
bonariensis populations, a native grass, differing significantly
in endophyte infection. The association between
endophytes and mycorrhizal fungi colonisation was
assessed by analysing plant roots collected from the field.
We found that roots from endophyte-infected populations
showed a significantly higher frequency of colonisation by
mycorrhizal fungi and that soil parameters were not related to
endophyte infection or mycorrhiza colonization. In addition,
we did not observe significant differences in the number of
AM propagules in soils of the three populations sites.We also
report the simultaneous development of Paris-type and
Arum-type mycorrhiza morphology within the same root
systems of P. bonariensis. The co-occurrence of both
colonisation types in one and the same root system found
in the three populations, which differed in Neotyphodium
infection, suggests that foliar endophytes do not determine
AM morphology. The percentage of root length colonised by
different types of fungal structures (coils, arbuscules,
longitudinal hyphae and vesicles) showed significant and
positive differences in arbuscular frequency associated with
endophyte infection, whereas the much smaller amounts of
vesicles and hyphal coils did not differ significantly.
Keywords Arbuscular mycorrhiza . Arum-type . Native
grass . Neotyphodium . Paris-type . Plant-fungus interactions