重金属镉对含羞草种子萌发和幼苗生长的影响

以不同浓度的镉(Cd)离子溶液处理含羞草种子,研究了镉对其种子萌发和幼苗生长的影响.结果表明:处理液中的镉浓度小于20 mg/L时,对含羞草种子萌发的影响较小;当镉浓度大于40 mg/L时,对含羞草种子萌发有明显的抑制作用,且抑制程度随着镉浓度的提高而加强;此外,随着处理液镉浓度的提高,对含羞草种子萌发后幼芽、幼根及幼苗生长的抑制作用明显加强,且镉对幼根生长的影响大于对芽的影响.

Effect of Cadmium on the seed germination and growth of Minosa pudica L.

The seeds of Mimosa pudica are treated with different concentration of Ca~(2+)[CdCl_2].The results showed that the concentration was less than 20 mg/L,which has a little effect to the seed germination and growth;there was obvious inhibition to the seed germination and growth of Mimosa pudica when the Ca~(2+) concentration reached 40 mg/L,and its inhibition increased as the increasing of concentration.With the increasing concentration of Ca~(2+) the growth of the bud、root and the seedlings was restrained obviously,and the restrained effect to the bud of Mimosa pudica was greater than the bud.