Pb Accumulation Characteristics of Different Genotypes of Wheat and Effect of Pb on Mineral Elements Accumulation

HU Tiezhu; LI Xiaojun; DING Weihua; ZHANG Ziyang; DONG Na; LI Gan; SUN Haiyan; YOU Qingqing; RU Zhengang

doi:10.15933/j.cnki.1004-3268.2017.05.003

Abstract：In order to select grain low Pb accumulating genotypes,Bainong 1306,Bainong 1309,Bainong 160,Bainong 418,Wenmai No.6,Zhoumai 18,Zhoumai 22 and Zhoumai 26 were grown in Hoagland's nutrient solution with Pb (NO3) 2,the Pb accumulation characters were studied,and the effects of Pb on accumulation of Ca,Mg,Fe and K were explored,so as to provide basis for solving the contradiction between accumulation of heavy metal and utilization of mineral elements.The results showed that there was genotypic difference in Pb content in wheat grain.Bainong 418 and Wenmai No.6 showed the lowest and the highest grain Pb content respectively.According to the organ with the highest Pb content,eight wheat cultivars (lines) were divided into three types,grain type,glume type,leaf type,the corresponding cultivars(lines) were Wenmai No.6;Bainong 1306,Bainong 1309,Zhoumai 22;Bainong 160,Bainong 418,Zhoumai 18 and Zhoumai 26.Compared with the control without Pb,the change of Ca,K,Mg and Fe contents in different organs of eight cultivars (lines)had difference under Pb treatment.Cultivated in Hoagland's nutrient solution with Pb(NO3)2,the Ca concentration increased considerably in the culm of Zhoumai 22,but decreased considerably in the other seven cultivars (lines);the K concentration in glume,leaf and culm (except Zhoumai 22 and Zhoumai 26) of eight cultivars (lines) decreased;the Mg concentration increased considerably in the grain of Wenmai No.6 and Zhoumai 18,but decreased considerably in other six cultivars (lines);the Fe concentration in the leaves of eight cultivars (lines) increased;the Ca content in Bainong 418 and Zhoumai 26,K content in Bainong 1306 and Bainong 418,Mg content in all tissues(except grain)of Zhoumai 18 and Zhoumai 26 had the same change patterns.