Update publication information. Plant growth regulators are the chemical substances that regulate growth and development in plants. The use of plant growth regulators on crops can adjust the balance of hormones and influence plant growth, thereby increasing crop yield and/or improving crop quality. Fubianliusuoyoumi (GZU001), a new potential plant growth regulator, significantly promoted root elongation in maize. However, an underlying potential mechanism is still unknown. To explore the response pathway and regulation mechanism of GZU001 in promoting maize root elongation, a combination of metabolomics and proteomics was used. In total, 101 differentially expressed proteins (DEPs) and 79 differentially expressed metabolites were identified. Our study found that four photosynthetic proteins (COPAQ4, P48183, B4FRH1, and A0A3L6EQ36) were significantly up-regulated, which can promote photosynthesis in maize.