转录因子PbbHLH164被PbRAD23C/D.1破坏稳定,并在梨果成熟期间调解乙烯生物合成
ZhiHua Guo1, Hong Liu1, SiQi Zheng1
1Jiangsu Engineering Research Centre for Pear, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China.
Journal of advanced research
|January 8, 2024
概括
一个新的转录因子,PbbHLH164,驱动的乙烯生产和果实成熟. 它的活性通过与PbRAD23C/D.1的相互作用来调节,控制成熟期间的乙烯生物合成.
科学领域:
- 植物生物学 植物生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 乙烯是一种关键的植物激素,调节着高潮期水果的成熟.
- 控制梨果中的乙烯生物合成的分子机制尚未完全理解.
研究的目的:
- 识别和描述果成熟期间涉及乙烯生物合成的新型调节因素.
- 阐明PbbHLH164调节乙烯生产的分子机制.
主要方法:
- 在不同发育和成熟阶段对梨的转录组分析.
- 基因表达分析 (qRT-PCR).
- 促进体结合测定和蛋白质与蛋白质相互作用研究 (共免疫沉).
- 乌比奎丁-蛋白酶体系统抑制试验.
主要成果:
- 一种新的基本螺旋环-螺旋环转录因子,PbbHLH164,被确定并发现在梨果成熟过程中受到上调调节.
- PbbHLH164直接与PbACS1b的促进体结合,增强乙烯生物合成并加速成熟.
- PbbHLH164与PbRAD23C/D.1相互作用,PbRAD23C/D.1是一种通过ubiquitin-proteasome路径参与其降解的蛋白质.
- 在成熟过程中,PbRAD23C/D.1的表达是下调的,而PbbHLH164则是上调的,这表明了协调的调节.
结论:
- 这项研究揭示了果成熟过程中乙烯生物合成的新型调节途径,涉及PbbHLH164和PbRAD23C/D.1.
- 对PbbHLH164的上调和对PbRAD23C/D.1的下调有助于在成熟过程中增加乙烯的产生.
- 这为果实成熟的分子控制和农业应用的潜在目标提供了新的见解.
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