Record ID No. |
2007 |
Author(s) |
Posada R.H., Franco L.A., Ramos C., Plazas L.S., Suarez J.C., Alvarez F , 2008 |
Affiliation |
Calle 63A, No 32-09, Piso 2, Bogota, COLOMBIA |
Title |
Effect of physical, chemical and environmental characteristics on arbuscular mycorrhizal fungi in Brachiaria decumbens (Stapf) pastures |
Source. Vol.(no):Page |
Journal of Applied Microbiology.104(1):132-140p. |
Categories |
Arbuscular Mycorrhiza |
Subjects |
Biochemistry |
Sub-subjects |
Miscellaneous |
Organism |
n.a. |
Country |
COLOMBIA, South America |
Abstracts |
Aim: To evaluate the effects of soil physical and chemical factors (pH,
conductivity, humidity, available phosphorus and organic matter) and environmental factors
(temperature, relative air humidity, altitude and atmospheric pressure) on arbuscular mycorrhizal
fungi (AMF)-Brachiaria decumbens grass relationship. Furthermore to establish patterns of
microbiological responses that allow to differentiate the study sites in two relief types.
Methods and Results: Mycorrhizal characteristics (spore density, external hyphae and root
colonizations by hyphae, vesicles and arbuscules), physical and chemical factors in soil and
environmental factors were measured. Conclusions: The effect of physical, chemical and
environmental factors on microbiological variables was related to the type of relief 'valley and
hilly terrain'; the AMF behaviour was affected only over narrower ranges of evaluated variables.
Similarly, the colonization of B. Decumbens roots by AMF hyphae, vesicles and the mycorrhizal
spore density follow different patterns according to the relief type. Significance and Impact of
the Study: The type of relief is one of the factors to be taken into consideration to evaluate
the AMF inoculum and root colonization of these pastures, because of the influence of slope - as
physical property of soil - on AMF. |