The findings hold promise for the future development of fully resistant varieties

A recent study shed light on the natural resistance exhibited by some peanut varieties to Aspergillus flavus infection and subsequent aflatoxin contamination.

Researchers used a metabolomics-based systems biology approach to understand the biochemistry behind increased peanut resistance to Aspergillus infection. The study reports the linkage between two specific metabolites and the level of resistance exhibited by peanut varieties.

The two key metabolites, hydroxycinnamic acid amides (HCAAs) and lignin precursor levels, were higher in the resistant genotype. These compounds strengthen the secondary cell wall, providing a physical and chemical barrier against infection. These findings provide insights that will be useful for breeding peanut varieties that are fully resistant to Aspergillus infection in the future.

Avuthu, T., Sanivarapu, H., Prasad, K., Sharma, N., Sudini, H. K., & Yogendra, K. (2024). Comparative metabolomics analysis reveals secondary cell wall thickening as a barrier to resist Aspergillus flavus infection in groundnut. Physiologia Plantarum, 176(1), e14169.

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