Exogenous application of paclobutrazol and TIS108 effectively increases shoot branching and mineral element utilization efficiency of ‘Duli’ (Pyrus betulifolia Bunge)

作者：Weilong Zhang, Shuai Yuan, Na Liu, Haixia Zhang, Yuxing Zhang · 发表于：Scientia Horticulturae · 年份：2025 · DOI：10.1016/j.scienta.2025.114010 · 被引用次数：4 · 研究领域：Plant Parasitism and Resistance、Plant Molecular Biology Research、Flowering Plant Growth and Cultivation

• PAC and TIS108 increase branch number, length, and photosynthesis and reduce plant length. • The content of N, P, Ca, and Mg was positively correlated with branch number, while GA 3 and SLs were negatively. • PAC and TIS108 regulate the expression of GA and SL pathway genes, and genes related to element absorption. • 10 μM PAC +0.1 μM TIS108 treatment was optimal for improving branching and mineral element utilization. Dwarfing and branching are important indexes affecting the yield of plants. However, the effect of paclobutrazol (PAC) and TIS108 on branching and the mineral element content is limited. Here, we studied the effects of PAC and TIS108 on the branching and nutrient utilization of ‘Duli.’ Each treatment significantly increased the number of branches and branch length and decreased the plant length. Each treatment significantly decreased the content of gibberellin (GA 3 ) and strigolactones (SLs) and promoted photosynthesis. Additionally, the content of GA 3 and SLs and the activities of D27, CCD7, and LBO were significantly negatively correlated with the number of branches. The membership function showed that plant length and the number of branches were highest in the 10 μM PAC + 0.1 μM TIS108 treatment. Furthermore, the concentrations, uptake, shift, and partitioning of ions varied among treatments. A mantal test showed that the N content was positively correlated with the number of branches. Principal component analysis was used to comprehensively evaluate the...