title: [Allelopathic effect of Nelumbo nucifera stem and leaf tissue extract on the growth of Microcystis aeruginosa and Scenedesmus quadricanda].
abstract: Effects of Nelumbo nucifera stem and leaf tissue extract on the growth of Microcystis aeruginosa and Scenedesmus quadricanda were studied to verify its potential in entriphication control. Five concentrations of Nelumbo nucifera stem and leaf tissue extract were chosen to compare their inhibitory effects on the growth of Microcystis aeruginosa and Scenedesmus quadricanda. The result showed that the leaf extract inhibited the algae bloom more effectively than the stem extract on the whole. When the leaf extract normality was 25 g x L(-1), the highest inhibition rate of Microcystis aeruginosa and Scenedesmus quadricanda was 71.33% and 78.14%, respectively, while for the stem extract, the values were 49.78% and 52.14%. Propanamide was found in both the stem and leaf tissue extracts of Nelumbo nucifera by GC-MS analysis, with concentrations of 1.1 mg x L(-1) and 0.2 mg x L(-1), respectively. The EC50 values of the two kinds of algae were calculated by the probability method.
authors.affiliation: Chinese Research Academy of Environmental Sciences, Beijing 100012, China. heliansheng08@126.com
authors.forename: Lian-Sheng
authors.initials: LS
authors.lastname: He
authors.forename: Fan-Li
authors.initials: FL
authors.lastname: Meng
authors.forename: Xiao-Jun
authors.initials: XJ
authors.lastname: Diao
authors.forename: Yi-Wei
authors.initials: YW
authors.lastname: Li
authors.forename: Rui
authors.initials: R
authors.lastname: Meng
authors.forename: Bei-Dou
authors.initials: BD
authors.lastname: Xi
authors.forename: Jian-Min
authors.initials: JM
authors.lastname: Shu
mesh_terms: D064089:Allelopathy / Q000502:physiology*; D005068:Eutrophication / Q000187:drug effects*; D008401:Gas Chromatography-Mass Spectrometry; D046931:Microcystis / Q000187:drug effects* / Q000254:growth & development; D031653:Nelumbo / Q000737:chemistry* / Q000502:physiology; D010675:Pheromones / Q000494:pharmacology; D010936:Plant Extracts / Q000494:pharmacology; D018515:Plant Leaves / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D044444:Scenedesmus / Q000187:drug effects* / Q000254:growth & development
chemical_list: D010675:Pheromones; D010936:Plant Extracts