1. Differential Analysis in the Uptake and Accumulation of Cadmium and Lead by Wheat Varieties with Different Phosphorus Efficiencies
- Author
-
SUN Qizhuang, WANG Long, HUANG Shaomin, XIAO Yatao, SUI Fuqing, QIN Shiyu, LIU Hongen, and ZHAO Peng
- Subjects
phosphorus use efficiency ,wheat ,cadmium ,lead ,root uptake ,Agriculture (General) ,S1-972 ,Irrigation engineering. Reclamation of wasteland. Drainage ,TC801-978 - Abstract
【Objective】 Soil contamination by cadmium (Cd) and lead (Pb) is a great environmental concern for food safety, and breeding cultivars that can reduce their uptake is one way to grow crops in Cd-and Pb-contaminated soils. In this paper, we experimentally studied how wheat lines with different phosphorus (P) uptake affect their uptake, translocation and accumulation of P, Cd and Pb in the crops. 【Method】 The experiment consisted of a lab part and a field part. The lab part considered one factor - wheat varieties, and the field part was arranged randomly in soil that had been moderately contaminated by Cd and Pb. In both parts, we measured Cd and Pb uptake and their subsequent translocation. 【Result】 The average P content in the roots of lines with high P (HP) use efficiency was 7.69 mg/g, significantly lower than that in the lines with low P (LP) use efficiency, which was 8.36 mg/g (P0.94), with the maximum absorption rates (Vmax) and the Michaelis constants (Km) differing significantly between varieties (P0.05). The increase in root P content helps reduce the translocation of Cd and Pb; an increase in translocation coefficient of P did not show a noticeable impact on Pb translocation, but significantly boosted Cd transport from roots to the shoots. 【Conclusion】 The roots of LP varieties showed high uptake but low translocation of P, Cd and Pb, as opposed the HP varieties which showed a low uptake but high translocation. This suggests that LP varieties are more suitable for growing in soils contaminated by Cd and/or Pb.
- Published
- 2022
- Full Text
- View/download PDF