Plant Cell Reports

, Volume 37, Issue 12, pp 1693–1705 | Cite as

The effect of auxin and strigolactone on ATP/ADP isopentenyltransferase expression and the regulation of apical dominance in peach

  • MinJi Li
  • Qinping Wei
  • Yuansong Xiao
  • FuTian PengEmail author
Original Article


Key message

We confirmed the roles of auxin, CK, and strigolactones in apical dominance in peach and established a model of plant hormonal control of apical dominance in peach.


Auxin, cytokinin, and strigolactone play important roles in apical dominance. In this study, we analyzed the effect of auxin and strigolactone on the expression of ATP/ADP isopentenyltransferase (IPT) genes (key cytokinin biosynthesis genes) and the regulation of apical dominance in peach. After decapitation, the expression levels of PpIPT1, PpIPT3, and PpIPT5a in nodal stems sharply increased. This observation is consistent with the changes in tZ-type and iP-type cytokinin levels in nodal stems and axillary buds observed after treatment; these changes are required to promote the outgrowth of axillary buds in peach. These results suggest that ATP/ADP PpIPT genes in nodal stems are key genes for cytokinin biosynthesis, as they promote the outgrowth of axillary buds. We also found that auxin and strigolactone inhibited the outgrowth of axillary buds. After decapitation, IAA treatment inhibited the expression of ATP/ADP PpIPTs in nodal stems to impede the increase in cytokinin levels. By contrast, after GR24 (GR24 strigolactone) treatment, the expression of ATP/ADP IPT genes and cytokinin levels still increased markedly, but the rate of increase in gene expression was markedly lower than that observed after decapitation in the absence of IAA (indole-3-acetic acid) treatment. In addition, GR24 inhibited basipetal auxin transport at the nodes (by limiting the expression of PpPIN1a in nodal stems), thereby inhibiting ATP/ADP PpIPT expression in nodal stems. Therefore, strigolactone inhibits the outgrowth of axillary buds in peach only when terminal buds are present.


Apical dominance Cytokinin Auxin Strigolactone Isopentenyltransferase Peach 



(3aR*,8bS*,E)-3-(((R*)-4-methyl-5-oxo-2,5-dihydrofuran-2-yloxy)methylene)-3,3a,4,8b-tetrahydro-2H-indeno[1,2-b]furan-2-one, a synthetic strigolactone




iP riboside


Indole-3-acetic acid




Peach gene adenosine phosphate isopentenyltransferase




Trans-zeatin riboside



This work was supported by the China Agriculture Research System [CARS-31-3-03].

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

299_2018_2343_MOESM1_ESM.docx (631 kb)
Supplementary material 1 (DOCX 631 KB)


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • MinJi Li
    • 1
  • Qinping Wei
    • 1
  • Yuansong Xiao
    • 2
  • FuTian Peng
    • 2
    Email author
  1. 1.Beijing Academy of Forestry and Pomology SciencesBeijing Academy of Agriculture and Forestry Sciences/Key Laboratory of Urban Agriculture (North China), Ministry of AgricultureBeijingPeople’s Republic of China
  2. 2.College of Horticulture Science and EngineeringShandong Agricultural UniversityTai’anPeople’s Republic of China

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