在Prunus mume中,PmLBD3将auxin和brassinosteroid信号通路与矮化联系起来
Yufan Ma1, Chengdong Ma1, Pengyu Zhou1
1Laboratory of Fruit Tree Biotechnology, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, China.
BMC biology
|August 25, 2024
概括
普鲁努斯·穆梅根茎通过改变激素水平,显著降低石头水果植物的高度. 该PmLBD3基因调节了布拉西诺利德的无活化和细胞增殖,将auxin信号与矮化联系起来.
科学领域:
- 植物科学 植物科学
- 分子生物学分子生物学
- 农业科学 农业科学
背景情况:
- 用矮根茎移植控制了水果生产中的植物高度.
- 由Prunus mume (mume) 根茎引起的矮化背后的分子机制尚未完全理解.
- 以前的研究表明,与Prunus persica (桃子) 根茎相比,mume根茎减少了植物的高度,内部节点的长度和节点数.
研究的目的:
- 通过mume根茎研究调节植物高度的分子机制.
- 为了分析石头水果植物的转录和代谢变化,将其移植到mume上,与桃子根茎相比.
- 阐明特定的基因和激素途径在 mume 诱导的矮化中的作用.
主要方法:
- 对"长洋/木乃伊"和"长洋/桃子"移植组合进行了转录组和代谢组分析.
- 基因表达概况被用来识别激素信号转导和代谢途径的变化.
- 分析代谢物水平,包括黄类,黄类,氨基酸和脂肪酸.
主要成果:
- 移植到 mume 根茎上导致了明显降低的 brassinolide 水平和植物激素信号转导基因的改变表达.
- 代谢分析显示,矮植物的黄酸,氨基酸,脂肪酸水平降低,能量代谢减少.
- 在 mume-grafted 植物中,PmLBD3 基因显著上调,由通过 PmARF3.3 传递auxin信号驱动.
- 发现PmLBD3通过与PmBAS1和PmSAUR36a相互作用,促进了布拉西诺利德的失活,并抑制了细胞增殖.
结论:
- PmLBD3充当关键的转录因子,将奥克辛信号与布拉西诺利德水平联系起来.
- 这项研究表明,PmLBD3调节激素平衡,导致石果树的矮化.
- 这些发现为通过根茎移植对植物结构的控制提供了分子洞察力.
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