MdPOB1L通过操纵MdNPR1蛋白稳定性来积极调节对玻尿酸菌的抗病能力
Fujun Zhang1,2, Haojian Li1, Xinsong Guo3
1College of Horticulture Science and Engineering, Apple Technology Innovation Center of Shandong Province, Shandong Collaborative Innovation Center of Fruit & Vegetable Quality and Efficient Production, National Key Laboratory of Wheat Improvement, Shandong Agricultural University, Tai-An, Shandong, China.
Molecular plant pathology
|August 7, 2025
概括
MdPOB1L作为一个积极的调节器在果植物防御Botryosphaeria dothidea. 这种E3无素结合酶通过操纵MdNPR1蛋白稳定性来增强疾病抵抗力,从而增强酸信号传递.
科学领域:
- 植物分子生物学 植物分子生物学
- 植物病理学 植物病理学
- 生物化学 生物化学
背景情况:
- E3 泛素酶通过泛素-蛋白酶系统调节植物生长,发育和防御反应.
- POZ/BTB含蛋白1 (POB1) 蛋白通常是植物防御的负调节者.
- 酸 (SA) 信号通路对于植物免疫是至关重要的.
研究的目的:
- 鉴定和描述果 (Malus domestica) 中植物防御反应的新型调节剂.
- 调查MdPOB1-like (MdPOB1L) 在对抗Botryosphaeria dothidea的防御中的作用.
- 阐明MdPOB1L影响植物免疫力的分子机制.
主要方法:
- 在Nicotiana benthamiana中进行了基因组学分析和亚细胞定位.
- 使用逆转录定量PCR (RT-qPCR) 的基因表达分析.
- 通过过度表达和抑制MdPOB1L在果果和果实中的功能分析.
- 蛋白质与蛋白质相互作用测定和无处不在分析.
主要成果:
- MdPOB1L是一种E3结合酶,被确定为抗B.dothidea.果防御的积极调节者.
- 过度表达MdPOB1L增强了抗病能力,并促进了SA-响应基因表达.
- MdPOB1L与MdNPR1相互作用,促进其无处不在和降解,从而增强SA信号.
- MdPOB1L在进化上与Pyrus bretschneideri POB1有关,并定位在细胞核中.
结论:
- MdPOB1L通过调节MdNPR1蛋白稳定性,积极调节果中对B. dothidea的防御反应.
- 这种机制涉及MdNPR1的核相互作用,无处不在和降解,导致下游SA信号的增强.
- MdPOB1L代表了一种改善果抗病能力的新目标.
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