不同基因型小麦的Pb积累特性及Pb对矿质元素积累的影响

发布时间：2018-10-07 19:25

【摘要】：利用Hoagland’s营养液培养的方法,探讨了百农1306、百农1309、百农160、百农418、温麦6号、周麦18、周麦22和周麦26等8个不同基因型小麦品种(系)的Pb积累特性,以筛选出籽粒Pb低积累型小麦品种(系),并研究了Pb对小麦Ca、Mg、Fe和K等矿质元素积累的影响,为解决重金属积累和矿质营养利用之间的矛盾奠定基础。结果表明,小麦籽粒Pb含量存在基因型差异,百农418籽粒Pb含量最低,温麦6号Pb含量最高。根据同一品种(系)的最高Pb含量部位,将8个小麦品种(系)分为籽粒型、颖壳型、叶片型,对应品种(系)分别为温麦6号,百农1306、百农1309、周麦22,百农160、百农418、周麦18、周麦26。与不加Pb(NO_3)_2的对照相比,Pb(NO_3)_2处理后,8个小麦品种(系)不同部位的Ca、K、Mg、Fe含量变化不同。除周麦22茎秆中Ca含量显著增加外,其他7个品种(系)均降低;8个品种(系)茎秆(周麦22、26除外)、叶片和颖壳中K含量均呈降低趋势;温麦6号和周麦18籽粒中Mg含量显著增加,其他6个品种(系)均显著降低;8个品种(系)叶片中Fe含量均升高。百农418和周麦26的Ca、百农1306和百农418的K、周麦18和周麦26的Mg含量(籽粒除外)变化模式相同。
[Abstract]:The characteristics of Pb accumulation of eight wheat genotypes (lines), such as Bainong 1306, Bainong 1309, Bainong 160, Bainong 418, Wenmai 6, Zhoumai 18, Zhoumai 22 and Zhoumai 26, were studied by using Hoagland's nutrient solution culture method. The effects of Pb on the accumulation of mineral elements such as Ca,Mg,Fe and K in wheat were studied in order to solve the contradiction between the accumulation of heavy metals and the utilization of mineral nutrients. The results showed that there were genotypic differences in Pb content of wheat grain, the Pb content of Banong 418 grain was the lowest, and that of Wenmai 6 Pb was the highest. According to the highest Pb content of the same variety (line), eight wheat varieties (lines) were divided into grain type, glume type, leaf type, and the corresponding variety (line) was Wenmai 6, respectively. Bainong 1306, Bainong 1309, Zhou Mai 22, 100 Nong 160, 100 Nong 418, Zhoumai 18, Zhoumai 26. Compared with the control without Pb (NO_3) 2, the content of Ca,K,Mg,Fe in different parts of 8 wheat varieties (lines) was different after treatment with NO_3. With the exception of Zhoumai 22, the content of Ca in the stem of Zhoumai 22 increased significantly, the other 7 varieties (lines) decreased, and the K content in leaves and glume decreased in 8 varieties (except Zhoumai 2226). The content of Mg in grains of Wenmai 6 and Zhoumai 18 increased significantly, while that of the other 6 varieties (lines) decreased significantly, while the content of Fe in leaves of 8 varieties (lines) increased significantly. The change pattern of Mg content (other than grain) was the same for Ca, 1306 and K of bimai 418 and Zhoumai 26, Zhoumai 18 and Zhoumai 26, respectively.
【作者单位】：河南科技学院小麦中心/河南省现代生物育种协同创新中心;
【基金】：国家自然科学基金项目(31671680) 河南省小麦产业技术体系岗位专家项目(S2015-01-G01)
【分类号】：S512.1

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