Chinese Bulletin of Botany ›› 2019, Vol. 54 ›› Issue (6): 744-752.DOI: 10.11983/CBB19032

• EXPERIMENTAL COMMUNICATIONS • Previous Articles     Next Articles

Effects of Sucrose on Seedling Growth and Development and SnRK1 Activity in Prunus persica

Shuhui Zhang,Hong Wang,Wenru Wang,Xuelian Wu,Yuansong Xiao,Futian Peng()   

  1. State Key Laboratory of Crop Biology, College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, China
  • Received:2019-02-22 Accepted:2019-05-17 Online:2019-11-01 Published:2020-07-09
  • Contact: Futian Peng

Abstract: This study analyzed the SnRK1 activity and seedling growth and development in response to different concentrations and durations of exogenous sucrose in peach (Prunus persica), thus providing theoretical basis and technical support for fruit production. The data showed that 5% sucrose treatment greatly enhanced the SnRK1 activity, which was continuously increased within a certain period of treatment. Compared with water and mannitol controls, 5% sucrose treatment significantly increased the contents of soluble sugar, starch, and chlorophyll, the biomass of aboveground and underground, and the net photosynthetic rate. Examination of root configuration showed that 5% sucrose significantly increased root surface area, root volume, and number of lateral roots, and promoted root thickening and elongation. qRT-PCR analysis showed that exogenous sucrose promoted auxin synthesis and transport in roots. In conclusion, application of certain concentration of sucrose promotes SnRK1 activity, carbon metabolism, and plant growth and development, increases root auxin synthesis and transport and affects root configuration in peach.

Key words: peach, SnRK1, sucrose, auxin, root configuration