Insect infestation triggers metabolic shifts in pecans: implications for nutritional quality

Area of Science:

• Agricultural Science
• Metabolomics
• Food Science

Background:

• Pecan (Carya illinoinensis) is a nutritious edible nut with known functional benefits.
• Insect infestation can cause hidden damage to pecan fruit peel, with unstudied metabolic effects on kernels.
• Metabolomics offers a way to explore these hidden metabolic changes.

Purpose of the Study:

• To investigate the metabolic alterations in pecan kernels caused by insect infestation.
• To identify specific metabolites and pathways affected by insect stress in pecans.

Main Methods:

• Utilized a widely targeted liquid chromatography-tandem mass spectrometry (LC-MS/MS) metabolomics approach.
• Analyzed 1614 identified metabolites to detect significant changes.

Main Results:

• 129 metabolites were significantly altered by insect infestation.
• Both primary (organic acids, amino acids, lipids) and secondary metabolites (flavonoids, phenolic acids, terpenoids) were affected.
• Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis revealed disruptions in carbon, energy, amino acid metabolism, and phenolic biosynthesis.

Conclusions:

• Insect infestation significantly changes the metabolic profile of pecans, potentially affecting nutritional and functional value.
• Findings offer insights for improved pest management strategies in pecan cultivation.
• Understanding metabolic shifts aids in enhancing overall pecan quality.