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A Comparative Study Of Medicago Truncatula Transcriptomes As They Relate To Saponin Defenses Against Insect Pests, Audra Mae Rogers
A Comparative Study Of Medicago Truncatula Transcriptomes As They Relate To Saponin Defenses Against Insect Pests, Audra Mae Rogers
Graduate Theses and Dissertations
Triterpene saponins are a class of defensive plant-derived compounds, which have a
variety of functions including antimicrobial, insecticidal, and nematicidal activities. This
research assessed the performance of the beet armyworm, Spodoptera exigua, following ad
libero feeding on Medicago truncatula accessions differing in specialized metabolite and
saponin profiles. Insect performance did not directly relate to the foliar saponin levels in the
accessions, which was measured using HPLC mass spectrometry. Accession ESP105 had the lowest foliar saponins overall, yet had similar levels of soyasaponins compared to the other accessions. Conversely, accessions A17, PRT178, and GRC43 had high foliar saponins with particularly high …