Effects of Boron Application on Absorption of Cadmium and Other Mineral Elements of Wheat

Boron (B) is a microelement and has been demonstrated to alleviate cadmium (Cd) stress and inhibit Cd uptake in wheat. However, the effect of B on accumulation of Cd and mineral elements accumulation in wheat are rarely investigated. A hydroponics experiment was performed with different treatments (CK for without B and Cd application, Cd + B, preB + Cd for B, Cd, and B was added 24 h earlier than Cd added) to explore the effect of B on the growth, subcellular component distribution of Cd, and the mineral distribution. Here, the dry weight of shoot and root were decreased under Cd application compared with CK treatment, while increased under B application, especially under preB + Cd treatment. The root parameters showed a similar trend, including surface area, root length and volume, and tips. The Cd concentrations increased under Cd application in root and shoot, while decreased under B application, especially under preB + Cd treatment in the root. In addition, the B concentration showed a decreasing trend under Cd stress, especially in roots. Subcellular component analysis showed that more than 50