Secondary metabolite accumulation and phytotoxicity of invasive species Solidago canadensis L. during the growth period

Abstract

Solidago canadensis L. (Asteraceae) is successful invader specie worldwide. We determined the biochemical parameters of S. Canadensis, involved in its invasion success. In its aqueous extracts, the total phenolics content (TPC) ranged between 0.968 mg ml-1 to 23.591 mg ml-1 depending on the plant ontogenetic stage, plant part and extract concentration (r = -0.7). The extract significantly inhibited the germination of rapeseed (r =-0.8) and ryegrass (r =-0.5) across different levels of TPC. Due to accumulated allelochemicals, the invasive S. canadensis, might acquire distribution advantage in new territories outside the native habitat range, through the inhibitory effects on germination of native plant species.