Abstract: The effects of AlCl₃ on Hibisucs moscheutos seed germination and growth were investigated to evaluate its hardiness to Aluminum (Al), in compassion with Carazinho, a wheat genotype tolerant to Al, and Egret, agenotype sensitive
to Al . For H. moscheutos and two wheat genotypes, our results indicated that germination was insensitive to AlCl₃ until at 500μmol/L. AlCl₃ of 50μmol/L inhibited the elongation of primary and lateral roots significantly, but had less effect on the number of lateral roots. There was no difference of root elongation between the H. moscheutos and wheat, but the lateral roots of H. moscheutos were more tolerant to Al than that of wheat genotypes. Under AlCl₃ of 50μmol/L, the reduction of root biomass was significant in wheat genotypes, but not in H. moscheutos, comparing to their control, suggesting that H. moscheutos is more tolerant to Al than the two wheat genotypes, and that Al has different effects on the growth of primary and lateral roots in both H. moscheutos and wheat .

Key words: Hibiscus moscheutos

摘要： 以不同抗铝小麦( Triticum aestivum L. ) 基因型: Carazinho ( 抗铝型) 和Egret (铝敏感型)为参比, 研究了铝胁迫对秋葵( Hibiscus moscheutos L. ) 种子萌发和幼苗生长的影响。结果表明: 秋葵和小麦种子的萌发对铝胁迫不敏感; 高浓度的AlCl3 ( 50μmol/L) 显著抑制主根和侧根伸长, 但对侧根数目的影响较小; 两种植物的主根伸长对铝胁迫的差异不显著, 而秋葵侧根对铝毒的抗性比两个供试的小麦基因型强; 50μmol/L 的AlCl₃ 显著降低两个小麦基因型的根系生物量, 但秋葵的根系生物量与对照比变化不大。表明秋葵幼苗的抗铝性强于两个小麦品种, 铝对秋葵、小麦侧根和主根的生长影响不同。

关键词: 秋葵, 铝毒, 种子萌发, 根伸长, 小麦FONT