EFFECTS OF VARIOUS SOIL ENVIRONMENTAL STRESSES ON THE OCCURRENCE, DISTRIBUTION AND EFFECTIVENESS OF VA MYCORRHIZAE

Authors

  • A.G. KHAN Department of Biological Sciences, Faculty of Business and Technology, University of Western Sydney Macarthur, P.O. Box 555, Campbelltown N.S. W. 2560

DOI:

https://doi.org/10.11598/btb.1995.0.8.117

Abstract

The vesicular - arbuscular (VA) mycorrhizal fungi are geographically ubiquitous soil inhabitants and form universal symbiotic relationship with plants from every phylum. These fungi link host plants with host soils and their biota in the mycorrhizosphere and play  an  important  role  in  plant  health,  productivity  and  soil  structure. Although  VA mycorrhizal  fungi  do  not  show  any  host  specificity,  there  is  increasing  evidence  that various  climatic  and  edaphic  environmental  factors  such  as  land  use  and management practices,  physical,  chemical  and  biological  properties  of  host  soils  and  host  plant characteristics  influence  their  occurrence,  taxonomic  distribution  and  effectiveness. The interaction of these factors with vesicular-arbuscular mycorrhizae (VAM) is poorly understood except in a few cases. It is now very clear that VA mycorrhizal associations are ecologically significant factors that require more attention than previously accorded. This  paper  discusses  the  occurrence,  distribution  and  significance  of  VAM  in environmentally  stressed  soil  conditions  that  limit  plant  growth  such  as  drought, waterlogging and salinity.                                                    Key  words:  Mycorrhizas/Environmental  factors/Waterlogging/Soil  salinity/Growth  development  stages/ Inoculum.

Downloads

Issue

Section

Research Paper