title: [Inhibitory effect of Surgassum thunbergii on Heterosigma akashiwo and Skeletonema costatum].
abstract: By the method of co-culture, this paper studied the inhibitory effect of Surgassum thunbergii culture filtrate, fresh tissue, dry powder, and aqueous extract on the growth of Heterosigma akashiwo and Skeletonema costatum. An isolated co-culture system was built, which confirmed the existence of allelochemicals and precluded the growth inhibition by direct contact. The results showed that the fresh tissue, dry powder, and aqueous extract of S. thunbergii could significantly inhibit the growth of H. akashiwo and S. costatum, and had lethal effect at relatively higher concentrations. The culture filtrate of S. thunbergii had no inhibitory effect on H. akashiwo, but could significantly inhibit the growth of S. costatum under initial or semi-continuous filtrate addition.
authors.affiliation: Laboratory of Marine Ecology, Ocean University of China, Qingdao 266003, Shandong, China. wangrenjun2002@126.com
authors.forename: Renjun
authors.initials: R
authors.lastname: Wang
authors.forename: Xuexi
authors.initials: X
authors.lastname: Tang
authors.forename: Lei
authors.initials: L
authors.lastname: Feng
authors.forename: Hui
authors.initials: H
authors.lastname: Xiao
authors.forename: Liang
authors.initials: L
authors.lastname: Qu
authors.forename: Hengjiang
authors.initials: H
authors.lastname: Cai
mesh_terms: D001673:Biodegradation, Environmental; D017377:Diatoms / Q000254:growth & development / Q000502:physiology*; D017753:Ecosystem; D005068:Eutrophication; D009792:Oceans and Seas; D000461:Rhodophyta / Q000254:growth & development / Q000502:physiology*; D044647:Sargassum / Q000254:growth & development / Q000502:physiology*; D012623:Seawater / Q000032:analysis*