铜尾矿对小麦生长发育和生理功能的影响

Effects of copper mine tailings on growth and development and physiological function of wheat.

通过盆栽实验 ,分析了铜陵铜尾矿对小麦生长发育和生理功能的影响 .结果表明 ,小麦种子能在铜尾矿上萌发 ,但发芽率和发芽速率均小于正常土壤中播种的小麦 ,高比例尾矿抑制小麦的株高 ,尾矿降低叶绿素含量 ,但对叶绿素a/b无影响 .与对照组相比 ,尾矿组根系表现为变短变粗 ,须根数减少 .尾矿能增加小麦根和茎叶部分生物量 ,且能明显提高根冠比 .在尾矿胁迫下 ,小麦叶片的细胞膜透性和游离脯氨酸含量随尾矿比例增加而增大 。

Through pot culture experiments,the effects of Tonling copper mine tailings on growth and development and physiological function of wheat were investigated in this paper.The results showed that the seeds of wheat could germinate in copper mine tailings,but seed germination percentage and germination rate were lower than that in control.High ratio tailings decreased seedling height.Tailings decreased chlorophyll contents,but didn't effect on chlorophyll a/b.Compared with control,tailings significantly inhibited root growth and decreased root number.Tailings increased root and shoot biomass and significantly increased root/shoot ratio of wheat.The permeability of cell membrane and the free proline content in leaves of wheat increased with the increase of the ratio of tailings, they were relative tolerance index of wheat to copper tailings stress.