Fragrant trees and fruits. (Photo courtesy of Wu Jiasheng)
Recently, the team of Wu Jiasheng, a professor at the State Key Laboratory of Zhejiang A&F University, published a research paper entitled “Meikene’s Improvement of Tolerance to Lead Stress in Aromace” in the Journal of Hazardous Materials, which systematically elucidated the mechanism of action of the new two-dimensional material MXene (Meconene) in alleviating the “lead toxicity” of Xiangqi.
MXene is a new class of two-dimensional materials with a graphene-like structure, consisting of transition metal carbides, nitrides or carbonitrides. The results not only provide a theoretical basis for the mechanism of immobilization of lead ions in plant root cells of environmental nanomaterials, but also have great significance for expanding the application field of MXene.
Cymbidium belongs to the genus of gymnosperm yew family, is a unique economic dried fruit in southern China, its nutritional value is high, rich in high-quality fatty acids, protein and a variety of trace elements, cultivation benefits are good, is a collection of fruit, medicinal, timber, greening, ornamental as one of the multi-purpose excellent economic species.
In recent years, with the advancement of urbanization, industrialization and a large number of automobile exhaust emissions, to a certain extent, the excessive accumulation of lead in Xiangqi forest land has been caused. As an emerging two-dimensional nanomaterial, MXene has the characteristics of good electrical conductivity, hydrophilicity, adsorption, etc., and is widely used in batteries, capacitors, biomedicine and other fields. However, its application in the field of agriculture and forestry has been rarely reported.
The results of Wu Jiasheng’s team showed that the application of MXene to the soil could effectively inhibit the accumulation of lead ions in the body, thereby enhancing the tolerance of Xiangqi seedlings to lead stress. Further studies revealed the mechanism of MXene’s inhibition of lead ion accumulation in Xiangqi body: on the one hand, MXene in the soil converts the effective lead in the soil into a stable state through its adsorption capacity, thereby reducing the uptake of soil lead by the seedlings of Xiangqi.
On the other hand, MXene increases the pectin content by regulating the expression of genes related to pectin synthesis/metabolism in the root of Aromatic Beech, thereby fixing more lead ions in the root cell wall, ultimately reducing the accumulation of lead ions in Aromatic Beech root. (Source: China Science News, Cui Xueqin, Chen Shengwei)
Related paper information:https://doi.org/10.1016/j.jhazmat.2022.130647