Molecular Strategy for Groundnut Preharvest Aflatoxin Elimination: Recent Advances and Future Prospects
Daničle Clavel1
The
traditional methods used for studying host-plant
resistance to A. flavus are not conducive to
identifying the specific components or metabolites
that directly affect aflatoxin biosynthesis.
Moreover, after twenty years of research in this
area, no valuable sources of resistance have been
found, particularly in the groundnut germplasm.
Since conventional breeding methods for
controlling aflatoxin are partially effective,
novel biotechnology methods are needed to develop
preharvest host-plant resistance to aflatoxin
accumulation. This research concerns improving
knowledge on:
1.The fundamental biological
mechanisms that regulate aflatoxin biosynthesis by
the fungus.
2.The host-plant resistance factors to aflatoxin accumulation.
The state of knowledge on biotechnological strategies will be analyzed at the following three levels: fungal, host-plant resistance, and effects of environmental factors (drought stress).
Fungal level
Host-plant resistance
Molecular markers
Candidate gene for antifungal enzymes in groundnut
Environmental factors: drought effects on maturation process and cell membrane stability
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