Brassinosteroids (BRs), a kind of phytohormone, play crucial roles in many plants’ growth and development processes, such as seed germination, skotomorphogenesis, cell elongation, stress response and other biological processes. We are interested in exploring the new functions of brassinosteroid and the cross-interaction between brassinosteroid and other hormones. In addition, we have discovered the function of GRFs in the greening process of etiolated arabidopsis seedlings, so we expect to reveal new functions of GRF and its role in plant hormone signaling pathways.