关键词: Pb(Ⅱ), 藜科, 珍珠猪毛菜, 白藜, 地肤, 萌发

Abstract: The study dealt with the effects of different Pb(Ⅱ) treatments (0, 50, 150, 300, 600, 800, 1 000 mg·L^-1) on seed germination and seedling growth of Salsola passerina Bunge, Kochia scoparia(L.) Schrad. and Chenopodium album L. The results showed that: The effects of Pb(Ⅱ) on the germination percentage，germination energy and germination index of S. passerina Bunge and K. scoparia(L.)Schrad. are not significant (p＞0.05) when Pb(Ⅱ) concentrations are 50 and 150 mg·L^-1, but it is significant (p＜0.05) on C.album L. once Pb(Ⅱ) concentration is up to 150 mg·L^-1. Although higher Pb(Ⅱ) concentrations (＞300 mg·L^-1) inhibit the germination of the three plants，the effect on K. scoparia(L.)Schrad. and C. album L. is stronger. The vigor index of seeds of three plants are significant from control, except for that of S. passerina Bunge at 50 mg·L^-1 Pb(Ⅱ). The effects on radicle and plumule elongation are not significant when Pb(Ⅱ) concentration is 50 mg·L^-1. As the concentration increasing, the inhibition on the elongation of radicle and plumule of three plants become stronger, but the effect on K. scoparia(L.)Schrad. and C. album L. is stronger than S. passerina Bunge. The seedling of K. scoparia(L.)Schrad. and C. album L. died at 300 and 600 mg·L^-1 Pb(Ⅱ), respectively. The seedling of S. passerina Bunge still alive even at 1 000 mg·L^-1, although it grows slowly. The tolerance of seedling growth of three different plants on Pb(Ⅱ) is S. passerina Bunge＞C. album L.＞K. scoparia(L.)Schrad.

Key words: Pb(Ⅱ), Chenopodiaceae, Salsola passerina, Kochia scoparia, Chenopodium album, Germination