【摘要】 采用田间模拟Cd、Cu、Zn污染的试验方法,以郑州9023为试验材料,研究了灌浆期Cd、Cu、Zn胁迫下小麦旗叶的呼吸速率、叶绿素、可溶性糖、游离脯氨酸、MDA含量和相对电导率六项生理指标的变化动态。结果表明,在小麦灌浆过程中,Cd、Cu、Zn胁迫均降低了旗叶的叶绿素含量,提高了旗叶呼吸速率、可溶性糖、游离脯氨酸、MDA的含量和相对电导率。在这3种重金属元素中,Cd对小麦旗叶的伤害作用在灌浆前期较强,而Cu则在灌浆后期显示出较强毒害。更多还原

【Abstract】 Filling stage is the key stage to decide the yield of wheat,which will be effected seriously by physiological activity of flag leaf. And heavy metal is just one of stresses to wheat filling stage.To study the effect of heavy metal on wheat,field experiment was done with Zhengzhou-9023 as the material.So changes of respiratory rate,content of chlorophyll,soluble sugar,free proline and malonaldehyde(MDA) and relative conductance rate in flag leaf of wheat with stresses of Cd,Cu and Zn were determined.The results showed that during the filling stage of wheat,with stresses of Cd,Cu and Zn,the content of chlorophyll in flag leaf were reduced,but the respiratory rate,the content of soluble sugar,free proline,MDA and the relative conductance rate in flag leaf were climbed.Additionally,within these three heavy metals,Cd did harm to flag leaf of wheat strongly in early filling stage,but Cu did in late filling stage.更多还原