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Tree peony is a well-known ornamental plant that is also valued for its medical uses and edible oil production. A long breeding period and low propagation rate are the main hurdles hindering the development of the tree peony industry, for which micropropagation can offer a solution. This article reviews the advances in tree peony micropropagation during the past three decades, providing a detailed analysis of the conditions required for the four stages of micropropagation (initiation, multiplication, in vitro rooting, and acclimatization). Additionally, potential of tree peony micropropagation for commercial application was evaluated. This review provides valuable information for the successful micropropagation of tree peony, permitting more targeted and in-depth research into tree peony micropropagation. The review summarized in detail the results achieved in tree peony micropropagation over the last three decades. Furthermore, the potential of the existing micropropagation protocol was evaluated and the problems and the future perspectives were summarized.

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