Record ID No. |
1936 |
Author(s) |
Garcia I.V., Mendoza R.E , 2008 |
Affiliation |
Consejo Nacl Invest Cientificas & Tecnicas, Museo Argentino Ciencias Nat Bernardino Rivadavia, CONICET, Av Angel Gallardo 470, Ciudad Buenos Aires, Buenos Aires, DF, ARGENTINA |
Title |
Relationships among soil properties, plant nutrition and arbuscular mycorrhizal fungi-plant symbioses in a temperate grassland along hydrologic, saline and sodic gradients |
Source. Vol.(no):Page |
FEMS Microbiology Ecology.63(3):359-371p. |
Categories |
Mycorrhiza General |
Subjects |
Biochemistry |
Sub-subjects |
Miscellaneous |
Organism |
n.a. |
Country |
ARGENTINA, South America |
Abstracts |
Temporal variations in the relationships among plant nutrient concentrations,
soil properties and arbuscular-mycorrhizal (AM) fungal dynamics were studied along a topographic
and saline gradient in a temperate grassland soil. Soil and plant (Lotus tenuis, Paspalum
vaginatum, Stenotaphrum secundatum) samples were collected on four seasonally based occasions.
The morphology of AM root colonization had a similar pattern in the plants studied. Maximum
arbuscular colonization occurred at the beginning of the growing season in late winter and was
minimal in late summer, but maximal vesicular colonization occurred in summer and was minimal in
winter, suggesting a preferential production of these morphological phases by the fungus with
respect to season. The greatest arbuscular colonization was associated with the highest N and P
concentrations in plant tissue, suggesting a correspondence with increases in the rate of
nutrient transfer between the symbiotic partners. Water content, salinity and sodicity in soil
were positively associated with AM root colonization and arbuscule colonization in L. Tenuis, but
negatively so in the grasses. There were distinct seasonally related effects with respect to both
spore density and AM colonization, which were independent of particular combinations of plant
species and soil sites. |