Inorganic phosphate (Pi) starvation severely affects the normal growth and development of plants. Here, a Pi-responsive gene, named MdMYB2 (MDP0000823458), was cloned and functionally identified in apple. Overexpression of MdMYB2 regulated the expression of Pi starvation-induced (PSI) genes and then promoted phosphate assimilation and utilization. The ectopic expression of MdMYB2 in Arabidopsis influenced plant growth and flowering, which was partially rescued by application of exogenous gibberellin (GA). These results indicated that MdMYB2 may be an essential regulator in phosphate utilization and GA-regulated plant growth and development.

中文翻译：

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苹果 MdMYB2 基因在磷饥饿反应中的功能鉴定

无机磷酸盐（Pi）饥饿严重影响植物的正常生长发育。在这里，一个名为 MdMYB2 (MDP0000823458) 的 Pi 响应基因被克隆并在苹果中进行了功能鉴定。MdMYB2的过表达调节了磷饥饿诱导（PSI）基因的表达，进而促进了磷的同化和利用。MdMYB2 在拟南芥中的异位表达影响了植物的生长和开花，这部分被外源赤霉素 (GA) 的应用所挽救。这些结果表明 MdMYB2 可能是磷酸盐利用和 GA 调节的植物生长发育的重要调节剂。