Triterpene-based plant defenses
Azucena González-Coloma, Carmen López-Balboa, Omar Santana, Matías Reina and
Braulio M. Fraga
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Abstract
Pentacyclic triterpenes are abundant in the plant kingdom and have a wide array of
pharmacological activities. They also have insect antifeedant effects and therefore
apparently play a role in plant defense. In this paper, we describe the insecticidal
activity of pentacyclic triterpenes of plant origin from different chemical classes on
several insect pests (Spodoptera littoralis, Leptinotarsa decemlineata and Myzus
persicae), their phytotoxic properties and their selective cytotoxic effects on insectderived Sf9 and mammalian CHO cells. We also discuss the role they play in plant
defense based on these activities.
Keywords Triterpenes - Bioactivity - Antifeedant - Phytotoxic - Cytotoxic
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