Plant height is a crucial trait affecting the plant architecture of cucumber.A stably inherited natural dwarf mu-tant of cucumber,dw-37,was used as the experimental material.Cloning and sequence alignment of the DNA sequences of reported cucumber dwarfing genes indicated that dw-37 is a novel cucumber dwarf mutant.Phenotypic investigation and cytological observation of the stems and vines of dw-37 and the wild-type cucumber S-SB with normal plant height revealed that the length of each internode in the stems and vines of dw-37 was shortened,and the cell area in the longitudi-nal section of the stems and vines was significantly reduced.Transcriptome analysis of young stems and vines of dw-37 and S-SB showed that most of the differentially expressed genes were significantly enriched in pathways related to the synthesis and signal transduction of plant hormones.In summary,the dwarf phenotype of the novel cucumber dwarf mu-tant dw-37 is attributed to the reduction in cell area of the stem internodes,and this process is finely regulated by multiple plant hormones.These findings provide a new perspective and genetic resources for understanding the regulatory mecha-nism of cucumber plant height.
维普
万方数据