<i>PhSPEAR1</i> Participates in Regulating the Branch Development of Petunia
2024
Wei Wu | Chaoqun Li | Qi Zhang | Yan Wang | Xueying Li | Qin Yang | Lili Dong
<i>Petunia hybrida</i> is an economically important ornamental plant species. Branching in ornamental plants is closely associated with their ornamental traits, and branching is a significant agronomic trait in petunia, which shapes plant architecture and production cost. Although there are few studies regarding the involvement of the <i>SPEAR</i> genes in lateral branch development, they are known to regulate the development of plant organs. The <i>PhSPEAR1</i> gene in petunia, an ortholog of Arabidopsis <i>SPEAR1,</i> was isolated for study. According to the results of real-time quantitative PCR (qRT-PCR), <i>PhSPEAR1</i> was primarily expressed in the roots. The fluorescence signal indicated that PhSPEAR1 was localized in the nucleus and cytoplasm. An increase in <i>PhSPEAR1</i> expression was induced by cytokinin or decapitation. Overexpression of <i>PhSPEAR1</i> increased lateral branches in Arabidopsis. Based on our findings, <i>PhSPEAR1</i> participates significantly in the regulation of branch number in petunia.
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