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ARTICLE

Allelopathic testing of Pedicularis kansuensis (Scrophulariaceae) on seed germination and seedling growth of two native grasses in the Tibetan plateau

Shang ZH^1,2, SG Xu¹

1 International Centre for Tibetan Plateau Ecosystem Management, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020 China.
2 Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 10085 China.

* Corresponding Author:Address Correspondence to: Shang Zhanhuan, e-mail:

Phyton-International Journal of Experimental Botany 2012, 81(all), 75-79. https://doi.org/10.32604/phyton.2012.81.075

Abstract

Pedicularis kansuensis is a dominating poisonous weed, and it might have allelopathic effects on other native grasses in alpine meadows. An experiment was conducted to examine a range of concentrations of aqueous whole plant extracts (25, 12.5, 2.5, 1.25, 0.25 and 0.0 g/L) of P. kansuensis, prepared at the flowering stage on seed germination and seedling growth of two native grasses (Poa pratensis and Elymus nutans). High concentrations of aqueous extracts of P. kansuensis inhibited seed germination and seedling growth of P. pratensis (p<0.05). Most aqueous extracts of P. kansuensis had a stimulatory (p<0.05) effect on E. nutans. Our results suggest that the allelopathic ecology of P. kansuensis on other native grasses needs further experiments.

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