Fig. 1 Gene structure and conserved motifs of the tomato 20S proteasome gene family

Fig. 2 Chromosomal localization and replication relationships of the 20S proteasome gene family The outer box represents the chromosome skeleton，the middle and inner boxes indicate gene density，and the approximate distribution of each tomato 20S proteasome gene is marked on the chromosome skeleton by a short black line. Coloured lines refer to the linkage groups with more than 0.95 similarity，red lines 0.98-0.99，green lines 0.97-0.98，and light grey lines refer to the linkage groups with less than 0.95 similarity and the linkage groups of other genes.

Fig. 3 Subcellular localization of tomato SlPRA17-10 and SlPRA20-11 in tobacco

Fig. 4 Sequence similarity of 20S proteasome gene family in tomato

Fig. 5 Phylogenetic tree of 20S proteasome gene family sequences from six species α and β represent different α-subunits and β-subunits.

Fig. 6 Covariance analysis of 20S proteasome genes in different species Gray lines indicate blocks of covariance between tomato and other species，and red lines highlight 20S proteasome gene pairs.

Fig. 7 Predicted cis-acting elements of the tomato 20S proteasome gene family

Fig. 8 Tissue-specific expression of 20S proteasome gene in tomato A shows the relative expression of tomato 20S proteasome genes in different tissues and different developmental stages（TFGD），and figure B shows qPCR analysis of the expression levels of some genes. 0 DPA：Anthesis flowers；10 DPA：10 days post anthesis fruit；20 DPA：20 days post anthesis fruit；33 DPA：Rippening fruit. COTYL：Cotyledons；HYPO：Hypocotyl；MERI：Vegitative meristems；ML：Mature leaves；RT：Root；YFB：Young flower buds，YL：Young flower buds；FL：Flower；FR：Fruit.