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作者	单位
戴媛，伏毅，谭晓荣	河南工业大学粮油重点实验室与工程中心，河南工业大学生物工程学院，河南郑州 450001

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中文摘要:

为探讨利用轻度干旱处理促进金属离子吸收的可能性，采用液体培养法，研究了不同干旱处理方式对小麦幼苗Fe、Zn两种元素吸收和分布的影响。将10 d苗龄（3叶期）小麦幼苗分为5组，其中4组每天分别干旱1、2、3和4 h后复水，连续8 d，另外一组连续干旱24 h后复水，测定各处理的根、叶相对含水量和根、茎、第一叶、第二叶、第三叶Fe、Zn含量。结果表明，每天间断干旱1~4 h处理的小麦叶片相对含水量变化较小，而根系相对含水量变化较大；连续干旱24 h后叶片和根的相对含水量均显著下降。不同干旱处理条件下，小麦幼苗根、茎及第一叶、第二叶、第三叶中的Fe、Zn含量均增加，增加幅度随着干旱程度的增加而增大，连续干旱处理增加幅度最大，其中第三叶的Zn含量达到对照的2.3倍。小麦幼苗单株Fe、Zn吸收量也随干旱程度的增加而升高，其中连续干旱处理最高，分别是对照的1.39和1.21倍，增加的Fe、Zn主要分布在根和第一叶、第二叶中。

英文摘要:

To explore the possibility utilizing mild drought treatment to promote metal ions absorption，uncontinuous drought treatment (1 h, 2 h, 3 h, 4 h each day, lasting for 8 days) and 24 h continuous drought treatment were adopted to wheat seedlings, Fe and Zn content in root, shoot, 1~3 leaves and relative water content in wheat leaves were detected to investigate the effect of different drought treatments on uptake and distribution of Fe and Zn. Results indicated that the water contents in wheat leaves of uncontinuous drought treatments did not largely changed, but that of roots obviously decreased; the relative water contents in wheat leaves and roots of 24 h continuous treatments were both decreased obviously. Both Fe and Zn content increased in roots, culms and leaves of wheat seedlings under all drought treatments, the highest was in continuous drought treatment, within which the highest was 2.3 times of control. With the increasing of drought treatment severity, uptake of Fe and Zn increased, the highest Fe and Zn were 1.39 and 1.21 times of control, increased Fe mainly distributed in roots and the first, second leaves.

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