综合转录组,代谢组和miRNA分析揭示了甜玉米皮厚度的遗传调节网络
Xiaming Wu1, Ruixiang Liu2, Meijing Zhang2
1Institute of Fruit Tree Research, Guangdong Academy of Agricultural Sciences, Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of Science and Technology Research on Fruit Tree, Guangzhou, China.
Frontiers in plant science
|December 29, 2025
概括
甜玉米的周骨厚度,对口感至关重要,受细胞层的影响. 多omics分析确定了调节这种特性的关键基因,miRNA和代谢物,为作物改进提供了宝贵的遗传资源.
科学领域:
- 植物科学 植物科学
- 基因组学就是基因组学.
- 代谢学 代谢学 代谢学
背景情况:
- 甜玉米中的周围厚度显著影响其口感.
- 围心石厚度变化的分子基础在很大程度上仍未被阐明.
研究的目的:
- 为了研究在甜玉米皮厚度的差异背后的分子机制.
- 为了识别关键的基因,miRNAs,和代谢物,涉及到骨发育.
主要方法:
- 使用了转录学,miRNA分析和代谢学.
- 扫描电子显微镜 (SEM) 用于分析细胞层变异.
- 进行了综合的多主题数据分析.
主要成果:
- 鉴定了6,054个差异表达的基因 (DEG),73个差异表达的miRNA和113个差异积累的代谢物 (DAM).
- 发现关键的miRNAs (例如zma-miR164,zma-miR166) 调节转录因子和植物激素信号传递.
- 植物激素信号转导和烯胺生物合成途径中的基因和代谢物与周围的生长有显著的关联.
结论:
- 围骨厚度的差异主要是由于细胞层数量的变化.
- 特定的miRNA和代谢途径,包括烯胺和激素信号传递,在调节甜玉米皮厚度方面发挥着关键作用.
- 这些发现为甜玉米育种提供了理论支持和遗传资源.
相关概念视频
01:22MicroRNAs
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...
01:22MicroRNAs
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...
01:22MicroRNAs
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...