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作 者 ：虎瑞;苏雪;晏民生;孙坤*

期 刊 ：植物研究 2009年 29卷 3期 页码：362-367

关键词：Pb(Ⅱ)；藜科；珍珠猪毛菜；白藜；地肤；萌发；

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

摘 要 ：以珍珠猪毛菜（Salsola passerina Bunge）、地肤（Kochia scoparia(L.)Schrad.）和白藜（Chenopodium album L.）3种藜科植物为研究对象，研究不同浓度（0、50、150、300、600、800、1 000 mg·L^-1）的Pb(Ⅱ)处理对植物种子萌发和幼苗生长的影响。结果表明：当Pb(Ⅱ)浓度为50和150 mg·L^-1时，珍珠猪毛菜和地肤种子的发芽率、发芽势和发芽指数与对照相比差异不显著,Pb(Ⅱ)浓度为150 mg·L^-1时，对白藜种子发芽率、发芽势和发芽指数有明显影响,Pb(Ⅱ)浓度大于300 mg·L^-1对3种植物种子萌发均有抑制作用，对白藜和地肤的抑制大于珍珠猪毛菜。3种植物的种子活力指数除珍珠猪毛菜在50 mg·L^-1时与对照无显著差异，其余各处理均与对照有极显著差异。Pb(Ⅱ)浓度为50 mg·L^-1时，对3种植物的胚根长和胚芽长都影响不大，随着Pb(Ⅱ)浓度的升高，对3种植物的胚根长和胚芽长都有明显的抑制作用,对地肤和白藜的抑制强度更大。地肤和白藜幼苗分别在Pb(Ⅱ)浓度为300和600 mg·L^-1时死亡,当Pb(Ⅱ)浓度达到1 000 mg·L^-1时，珍珠猪毛菜仍可生长，但生长比较缓慢。3种植物幼苗对Pb(Ⅱ)的耐受性为：珍珠猪毛菜＞白藜＞地肤。

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.

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