Foliar blocking agent and its application to accurately control the expression of genes related to cadmium absorption and transport in rice

摘要

The present invention relates to the field of environmental protection, and more specifically, to a foliar blocking agent that accurately controls the expression of genes related to cadmium absorption and transport in rice and its application. In the present invention, a nano-selenium gel reduced with ascorbic acid solution is generated from selenite or selenite, and the expression of genes related to cadmium absorption and transport in paddy rice is precisely controlled by peptization. A leaf surface blocking agent is obtained, and then the leaf surface blocking agent and silica sol are mixed to obtain a selenium composite silica sol leaf surface blocking agent. The present invention also provides a leaf surface blocking method for accurately controlling the expression of genes related to cadmium absorption and transport in paddy rice, with a certain degree of atomization at a specific growth period and a specific timing of paddy rice. By spraying a certain level of foliar blocking agent, silica sol, or selenium composite silica sol foliar blocking agent, the amount of cadmium accumulated in paddy rice can be reduced efficiently, and the cadmium content of paddy rice in moderately contaminated rice fields The amount can meet the food hygiene standards and has important significance for the safe use of large area heavy metal cadmium contaminated farmland in Japan. [Selection] Figure 4