Fig. 1 SlBON1 phylogenetic tree（A），tissue-specific expression（B），protein structure（C），gene structure（D），and knockout mutations（E） The different lowercase letters above the column indicate the statistical significance determined by Duncan’s multiple range test（P < 0.05）

Fig. 2 The morphology，length，diameter and endoreduplication of hypocotyls in the wild type and SlBON1 knockout mutants cr6 and cr8 EI：Endoreduplication index. 2C-32C：Cell ploidy

Fig. 3 Plant morphology，fresh and dry weight of aboveground tissues，plant height，stem diameter and leaf area in 70-day old seedlings of the wild type and SlBON1 knockout mutants cr6 and cr8

Fig. 4 The photosynthetic parameters，chlorophyll and starch content in 70 day old seedlings of the wild type and SlBON1 knockout mutants cr6 and cr8

Fig. 5 The enzyme activities of superoxide dismutase，catalase and peroxidase in 70-day old seedlings of the wild type and SlBON1 knockout mutants cr6 and cr8

Fig. 6 The morphology，fresh and dry weight，length，surface area and branch number of roots in 70-day old seedlings of the wild type and SlBON1 knockout mutants cr6 and cr8

Fig. 7 The heatmap analysis of differentially expressed genes in the wild type and SlBON1 knockout mutants cr6 and cr8

Fig. 8 KEGG pathway analysis of differentially expressed genes in the wild type and SlBON1 knockout mutants cr6 and cr8

Fig. 9 The heatmap analysis of differentially expressed genes of four pathways in 70-day old seedlings of the wild type and SlBON1 knockout mutants cr6 and cr8