title: [Allelopathic interactions between invasive plant Solidago canadensis and native plant Phragmites australis].
abstract: Taking the seeds of invasive plant Solidago canadensis and native plant Phragmites australis from their mono- and co-dominant communities as allelopathic acceptors, this paper analyzed the differences in the seed germination rate and sprout length after treated with five level (12.5, 25, 50, 100, and 200 mg x mL(-1)) S. canadensis and P. australis extracts, aimed to understand the allelopathic interactions between the two species. The 1000-grain weight and seed germination rate under distilled water treatment of the two species in co-dominated community were greater than those in mono-dominant community. Low level (12.5 and 25 mg x mL(-1)) S. canadensi extracts slightly promoted the seed germination rates of S. canadensis in both mono- and co-dominant communities, but high level (50, 100, and 200 mg x mL(-1)) S. canadensi extracts had strong inhibition effect, especially for the S. canadensis in co-dominated community. No significant patterns were observed about the effects of P. australis extract on S. canadensis seed germination. The sprout length of S. canadensis seeds in both mono- and co-dominant communities decreased with increasing level of S. canadensis extract, but decreased in a fluctuation way with increasing level of P. australis extract. After treated with the extracts of P. australis or S. canadensis, the seed germination rate of P. australis in mono-dominant community was significantly greater than that in co-dominant community (P < 0.05), but there was no significant difference between these two extracts.
authors.affiliation: Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China. yuzheli_2006@126.com
authors.forename: Yu-Zhe
authors.initials: YZ
authors.lastname: Li
authors.forename: Jiang-Wen
authors.initials: JW
authors.lastname: Fan
authors.forename: Xin
authors.initials: X
authors.lastname: Yin
authors.forename: En-Yi
authors.initials: EY
authors.lastname: Yang
authors.forename: Wei
authors.initials: W
authors.lastname: Wei
authors.forename: Zhi-Hui
authors.initials: ZH
authors.lastname: Tian
authors.forename: Liang-Jun
authors.initials: LJ
authors.lastname: Da
mesh_terms: D002681:China; D018525:Germination / Q000187:drug effects*; D058865:Introduced Species; D010675:Pheromones / Q000302:isolation & purification / Q000494:pharmacology*; D010936:Plant Extracts / Q000494:pharmacology; D018517:Plant Roots / Q000737:chemistry*; D006109:Poaceae / Q000737:chemistry / Q000254:growth & development*; D012639:Seeds / Q000254:growth & development; D036624:Solidago / Q000737:chemistry / Q000254:growth & development*
chemical_list: D010675:Pheromones; D010936:Plant Extracts