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Acta Prataculturae Sinica ›› 2024, Vol. 33 ›› Issue (7): 151-159.DOI: 10.11686/cyxb2023304

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Allelopathic effects of aqueous extracts of fallen leaves of Acer truncatum on three medicinal plants

Kun-fei RUAN(), Tian-qi WANG, Ning-ning BI, Shao-tong SHI, Sen LI, Zhong-hua LIU()   

  1. National Engineering Research Center of Tree Breeding and Ecological Restoration,College of Biological Science and Technology,Beijing Forestry University,Beijing 100083,China
  • Received:2023-08-30 Revised:2023-10-09 Online:2024-07-20 Published:2024-04-08
  • Contact: Zhong-hua LIU

Abstract:

In this study, we determined the effects of aqueous extracts from fallen leaves of Acer truncatum on three medicinal plants: Glycyrrhiza uralensisScutellaria baicalensisand Platycodon grandiflorus. The overall aim was to provide a theoretical basis for cultivating medicinal herbs in A. truncatum forests in Beijing. The effects of an aqueous extract from fallen leaves of A. truncatum at a range of concentrations on seed germination and seedling growth of the three medicinal plants were determined. The leaf litter extract of A. truncatum showed “low promoting and high inhibition” effect on the seed germination of G.uralensis and S. baicalensis, respectively, and inhibited the seed germination of P. grandiflorus. The leaf litter extract of A. truncatum most strongly inhibited the seed germination and seedling growth of P. grandiflorus, followed by S. baicalensis and then G. uralensis. The chlorophyll content in the leaves of all three medicinal plants was lower in those treated with the leaf litter extract of A. truncatum than in the controls. As the concentration of the A. truncatum leaf litter extract increased, the superoxide dismutase activity increased in leaves of S. baicalensis seedlings, and the catalase activity in leaves of S. baicalensis and G. uralensis seedlings first increased and then decreased. The malondialdehyde content in leaves of the three medicinal plants first increased and then decreased as the concentration of the A. truncatum leaf litter extract increased. Overall, these results show that S. baicalensis and G. uralensis are suitable for cultivation in A. truncatum forests, but P. grandiflorus is not.

Key words: Acer truncatum, fallen leaves, extract, seed germination, allelopathy