Phytotoxic Activity of Sesquiterpene Lactones-Enriched Fractions from <i>Cynara cardunculus</i> L. Leaves on Pre-Emergent and Post-Emergent Weed Species and Putative Mode of Action.

ABSTRACT: Sesquiterpene lactones (SLs) are compounds that are highly produced in Cynara cardunculus leaves, known for their phytotoxic activity. This study aims to assess SL-enriched fractions' (cynaropicrin, aguerin B, and grosheimin) phytotoxic potentials and putative modes of action, compared to an initial extract, using two approaches: first, against a panel of nine weed species in pre-emergence, and then on Portulaca oleracea L.'s post-emergency stage. The SL-enriched fractions demonstrated greater phytotoxic activity when compared with the C. cardunculus leaf initial extract. The SL-enriched fractions had higher activity at root growth inhibition over the panel tested, doubling the activity in five of them at 800 ppm. Regarding the post-emergence bioassay, the SL-enriched

SUBMITTER: Rosa D 

PROVIDER: S-EPMC11478626 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature