果转录因子MdZF-HD11通过促进Mdβ-GAL18表达来调节水果软化
Miaomiao Wang1, Yao Wu1, Wenduo Zhan1
1College of Horticulture, Henan Agricultural University, Zhengzhou, China.
Journal of experimental botany
|November 8, 2023
概括
乙烯诱导的MdZF-HD11转录因子激活了Mdβ-GAL18,这是一个降解点氨酸的酶. 这种相互作用加速了果的软化和成熟,影响了收获后的质量.
科学领域:
- 植物分子生物学 植物分子生物学
- 果实成熟生理学 果实成熟生理学
- 收获后技术 收获后技术
背景情况:
- 水果软化对于质量和保质期至关重要.
- 果子软化的机制得到了很好的研究,但在果 (Malus domestica) 中的研究较少.
- 了解果软化法规对于园艺行业至关重要.
研究的目的:
- 为了确定果果软化的关键调节者.
- 阐明MdZF-HD11影响水果变软的分子机制.
- 研究Mdβ-GAL18在果果细胞壁代谢和成熟中的作用.
主要方法:
- 对MdZF-HD11.11的基因鉴定和表征.
- 促进体分析和转录因子结合试验.
- 对乙烯和1-甲基cyclopropene 的反应基因表达分析.
- 在转基因果卡利和"金色美味"果中进行过度表达的研究.
- 酶活性测定 (β-银酸酶).
- 对水果坚硬度,颜色和乙烯释放的生理评估.
- 在番茄中进行跨物种验证.
主要成果:
- 确定了MdZF-HD11,一种指主体的转录因子.
- MdZF-HD11直接激活Mdβ-GAL18的促进体,这是一个降解点氨酸的酶.
- 这两种基因都对乙烯有反应,并被1-甲基cyclopropene抑制.
- 过度表达MdZF-HD11或Mdβ-GAL18增强了β-galactosidase活性,加速了果的成熟和软化.
- 番茄中MdZF-HD11的过度表达也促进了水果的软化.
结论:
- 乙烯诱导的MdZF-HD11在调节果软化的过程中起着至关重要的作用.
- MdZF-HD11/Mdβ-GAL18通路是控制果成熟期间细胞壁修饰的关键机制.
- 这一发现为收获后生理学和质量管理的潜在目标提供了新的见解.
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