biostudies-literatureUnknown10(42)Silva MAThe phytotoxic effects of extracts from <i>Hyptis crenata</i> ( <i><b>Hcre</b></i> ), <i>Hyptis suaveolens</i> ( <i><b>Hsua</b></i> ), <i>Hyptis saxatilis</i> ( <i><b>Hsax</b></i> ), <i>Hyptis campestris</i> ( <i><b>Hcam</b></i> ), and <i>Hyptis brevipes</i> ( <i><b>Hbre</b></i> ) were evaluated against three <i>Amaranthus</i> weed species under controlled germination chamber conditions. Extracts <i><b>Hcre</b></i> , <i><b>Hsua</b></i> and <i><b>Hsax</b></i> inhibited seed germination by 85-93% relative to the control and markedly suppressed radicle and hypocotyl growth in <i>Amaranthus viridis</i> and <i>Amaranthus hybridus</i> in Petri dish assays. At 200 ppm, <i><b>Hcre</b></i> and <i><b>Hsax</b></i> reduced radicle and hypocotyl lengths by up to 90% in both species, comparable to the eACS omega50359-50370https://www.ebi.ac.uk/biostudies/studies/S-EPMC12572983biostudies-literaturePhytotoxic Metabolites from <i>Hyptis</i> Species: Chemical Profiling and Bioherbicide Activity Against <i>Amaranthus</i>.PMC12572983Sampaio OMNicacio KJVieira LCCSilva MABellete BSda Silva LPFfalsePhytotoxic Metabolites from <i>Hyptis</i> Species: Chemical Profiling and Bioherbicide Activity Against <i>Amaranthus</i>.The phytotoxic effects of extracts from <i>Hyptis crenata</i> ( <i><b>Hcre</b></i> ), <i>Hyptis suaveolens</i> ( <i><b>Hsua</b></i> ), <i>Hyptis saxatilis</i> ( <i><b>Hsax</b></i> ), <i>Hyptis campestris</i> ( <i><b>Hcam</b></i> ), and <i>Hyptis brevipes</i> ( <i><b>Hbre</b></i> ) were evaluated against three <i>Amaranthus</i> weed species under controlled germination chamber conditions. Extracts <i><b>Hcre</b></i> , <i><b>Hsua</b></i> and <i><b>Hsax</b></i> inhibited seed germination by 85-93% relative to the control and markedly suppressed radicle and hypocotyl growth in <i>Amaranthus viridis</i> and <i>Amaranthus hybridus</i> in Petri dish assays. At 200 ppm, <i><b>Hcre</b></i> and <i><b>Hsax</b></i> reduced radicle and hypocotyl lengths by up to 90% in both species, comparable to the e2025-01-01T00:00:00Z2025 Oct2026-06-05T10:41:18.872Z2026-05-16T03:08:04.189ZS-EPMC125729834117914010.1021/acsomega.5c07637