Chinese Bulletin of Botany ›› 2020, Vol. 55 ›› Issue (5): 634-643.DOI: 10.11983/CBB20061

• SPECIAL TOPICS • Previous Articles     Next Articles

Recent Advances in Molecular Mechanisms of Plant Graft Healing Process

Lulu Xie, Qingqing Cui, Chunjuan Dong, Qingmao Shang*()   

  1. Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China
  • Received:2020-04-09 Accepted:2020-06-28 Online:2020-09-01 Published:2020-09-03
  • Contact: Qingmao Shang

Abstract:

Grafting can significantly improve target traits such as yield, quality, and resistance of vegetable varieties, and is widely applied in agricultural practice. Prompting graft healing between scion and stock at the graft interface is necessary to improve graft efficiency. Currently the improvement on the technology is hampered by our lack of understanding of regulatory mechanisms of graft healing. The graft healing process involves complicated and cross-linked physiological events, including wounding stress response, callus formation, cell communication between scion and stock, and the regeneration and reunion of scion and stock. Recent research has provided a good foundation for our understanding the molecular mechanisms of graft healing. In this review, we summarize the central roles of phytohormones in each of the physiological events, and the phytohormone-dependent and -independent gene regulatory networks in graft healing, to provide a reference for further studying graft healing-related molecular mechanisms.

Key words: grafting, graft healing, endogenous plant hormone, gene expression regulation