Fe·Zn对上海青白菜种子萌发和幼苗生理生化的影响

[目的]研究Fe、Zn对上海青种子萌发和幼苗生理生化的影响。[方法]以上海青为材料，研究不同浓度的Fe、Zn污染对上海青种子萌发、幼苗生长、叶绿素含量和过氧化氢酶活性的影响。[结果]低浓度（≤0．05mmoL／L）的Fe^2＋、Zn^2＋对上海青白菜萌发率、鲜重、叶绿素含量无明显影响；浓度过高就会产生一定的抑制作用。随着Fe^2＋、Zn^2＋浓度增大，上海青白菜的鲜重、叶绿素含量呈逐渐下降趋势。随Fe^2＋浓度的增高，上海青白菜植株内的过氧化氢酶活性逐渐升高；Zn^2＋表现出先促进后抑制，在浓度为0．25mmol／L处酶活性最大。[结论]Fe、Zn胁迫对上海青种子的萌发影响不大，对幼苗的生长影响较大。

Effects of Fe and Zn on Seed Germination and Seedlings Physiology and Biochemistry of Brassica rapa L.

[Objective]The purpose was to study the effect of Fe and Zn on seed germination and seedling physiology and biochemistry of Brassica rapa L.[Method]Taking the Brassica rapa L. as materials, the effects of different concentrations of Fe and Zn pollution on seed germination, seedling growth, chlorophyll content and CAT activity of Brassica rapa L. were studied.[Result]The effect of low concentration(≤0.05 mmol/L) of Fe~(2+), Zn~(2+) is not obvious on Brassica rapa L. cabbage. The high concentration can produce inhibition. With the increasing of Fe~(2+), Zn~(2+) concentrations, the fresh weight and the chlorophyll content of Brassica rapa L. cabbage show downward trend. With the increase of Fe~(2+) concentration, the CAT activity in Brassica apa L. seedling has improved; Zn~(2+) concentration was promoted, and then inhibited; the activity of CAT at the concentration of 0.25 mmol/L was the highest.[Conclusion]The effects of Fe and Zn on Brassica rapa L. seed germination was little and on seedling growth was big.