title: Eupatoriochromene and encecalin, plant growth regulators from yellow starthistle (Centaurea solstitialis L.).
abstract: Two chromenes, eupatoriochromene (1) and encecalin (2), have been isolated from yellow starthistle (Centaurea solstitialis L.). Both chromenes retard seed germination and reduce radicle and hypocotyl growth of weed and crop plant seedlings. In addition,1 increases adventitious root formation of mung bean cuttings.
authors.affiliation: United States Department of Agriculture, Western Regional Research Center, 94710, Albany, California.
authors.forename: G B
authors.initials: GB
authors.lastname: Merrill