转录因子MdESE3通过激活调节果中果酸含量的基因来控制水果酸度
Litong Zheng1, Wenfang Ma1,2, Peipei Liu1
1State Key Laboratory for Crop Stress Resistance and High-Efficiency Production/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi, China.
Plant physiology
|May 17, 2024
概括
一个新发现的转录因子MdESE3通过调节参与有机酸积累的关键基因来增强果酸度,包括MdMa11.
科学领域:
- 植物分子生物学 植物分子生物学
- 果实质量研究 果实质量研究
- 农业科学 农业科学
背景情况:
- 水果的酸度对味道和质量至关重要.
- 一个P3A类型的ATPase,MdMa11,以前与果的真空 pH 调节有关.
- 了解果酸度的遗传调节对于育种计划至关重要.
研究的目的:
- 研究MdMa11在果果酸度中的作用.
- 为了确定调节MdMa11表达的转录因子.
- 为了阐明控制果中有机酸积累的调节途径.
主要方法:
- 酵母单杂交查以确定与MdMa11促进体结合的转录因子.
- 亚细胞局部化测试以确定MdESE3的细胞位置.
- 在果和番茄中进行转基因分析,以评估MdESE3的功能.
- 染色体免疫沉定量PCR (ChIP-qPCR) 和记者测定 (露西法酶,GUS) 来确认基因相互作用和转录激活.
主要成果:
- 鉴定了APETALA2转录因子MdESE3,并将其定位在核中.
- 果和番茄中MdESE3的过度表达增加了水果酸度和有机酸含量.
- MdESE3直接与MdMa11促进体中的乙烯反应元件 (ERE) 结合,激活其转录.
- MdESE3还通过与它们的促进体结合,激活MdtDT和MdMDH12基因的表达,这些基因参与有机酸代谢.
结论:
- MdESE3在增强果果酸度方面发挥着重要作用.
- MdESE3作为MdMa11,MdtDT和MdMDH12的转录激活剂.
- 这项研究揭示了果中果酸积累的新型调节途径,在改善水果质量方面有潜在的应用.
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