PJB-2024-213
THE REPAIR EFFECTS OF CERIUM OXIDE NANOPARTICLES ON ENHANCED UV-B RADIATION IN MUNG BEAN (Vigna radiata) SEEDLING ROOTS
Cheng Sun
Abstract
In recent years, cerium oxide nanoparticles (CeO2-NPs) have attracted much attention for their ability to enhance plant resistance to various abiotic stresses such as high salt, drought, and low temperature. However, there is few studies on whether CeO2-NPs can help plants resist the damage caused by enhanced UV-B radiation. In this study, mung bean seedlings were selected as the object to discuss the effects of CeO2-NPs on physiological metabolism and growth and development of mung bean seedlings. In addition, the repair effects of CeO2-NPs on enhanced UV-B radiation damage in mung bean seedling roots were elaborated from morphological, physiological and biochemical, cellular and molecular levels. The results showed that CeO2-NPs could alleviate and enhance membrane damage and oxidative damage of taproots of mung bean seedlings under enhanced UV-B radiation, regulate the expression of auxin and cytokinin-related genes, reduce the activity of amylase and increase the content of starch. Thus, it can enhance the stress resistance for taproots of mung bean seedlings. Enhanced UV-B radiation-induced curvature of mung bean taproot was repaired to some extent and the response of taproot to gravity was restored. These results provide new ideas for the application of nanomaterials in alleviating UV-B stress.
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