J Integr Plant Biol ›› 2020, Vol. 62 ›› Issue (5): 550-555.DOI: 10.1111/jipb.12855

• Letter to the Editor • Previous Articles     Next Articles

The role of miR156 in rejuvenation in Arabidopsis thaliana

Bin-Bin Ye1,2, Ke Zhang1,3 and Jia-Wei Wang1,3*   

  1. 1National Key Laboratory of Plant Molecular Genetics (NKLPMG), CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology (SIPPE), the Chinese Academy of Sciences (CAS), Shanghai 200032, China
    2University of Chinese Academy of Sciences, Beijing 100049, Beijing
    3School of Life Science and Technology, ShanghaiTech University, Shanghai 200031, China

    *Correspondence:
    Email: Jia-Wei Wang(jwwang@sippe.ac.cn)
  • Received:2019-04-08 Accepted:2019-07-11 Online:2019-07-15 Published:2020-05-01

Abstract:

Rejuvenation refers to the process enabling plants to regain physiological and molecular characteristics lost after entering the adult phase. The underlying molecular mechanism is poorly understood. Previous studies have revealed that microRNA156 (miR156) is highly accumulated at juvenile stage and maintains juvenile traits by repressing a group of SQUAMOSA PROMOTER BINDING PROTEIN‐LIKE (SPL) transcription factors. Here, we found that induction of miR156 expression in adult leaves can only restore some aspects of juvenile traits, such as loss of epidermal leaf hairs on the lower side of leaves and absence of serration at the leaf edges, but is incapable of delaying flowering and promoting adventitious root production.

miR156 is a master regulator of the juvenile‐to‐adult transition in plants. We found that high level of miR156 in adult leaves can only restore some aspects of juvenile traits, such as loss of epidermal leaf hairs on the lower side of leaves and absence of serration at the leaf edges, but is incapable of delaying flowering and promoting adventitious root production.
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