OsS40-14通过调节ABA响应和抑制休眠释放来调节大米种子发芽
Xiangzi Zheng1, Weiqi Wang1, Chunlan Fan1
1Fujian Provincial Key Laboratory of Plant Functional Biology, College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China.
Plant physiology
|October 7, 2025
概括
OsS40-14通过控制酸 (ABA) 水平来负面调节米种子的发芽. 这一发现为培育耐收割前发芽 (PHS) 的米品种提供了新的目标.
科学领域:
- 植物生物学 植物生物学
- 分子遗传学 分子遗传学
- 农业科学 农业科学
背景情况:
- 种子发芽需要休眠释放,这个过程受到物理和生物化学因素的影响.
- 控制大米休眠释放的精确分子机制尚未完全理解.
研究的目的:
- 确定米中种子休眠释放和发芽的关键调节者.
- 阐明OsS40-14在控制大米种子发芽中的作用及其与酸 (ABA) 信号的关系.
主要方法:
- 使用CRISPR/Cas9基因编辑和转基因过度表达 (OE) 来创建oss40-14突变和OE-OsS40-14大米系.
- 分析了酸 (ABA) 水平,并评估了对外源ABA的反应.
- 进行了转录和分离在目标下和标记 (CUT & Tag) -seq分析.
主要成果:
- oss40-14突变体表现出收获前发芽 (PHS) 和加速发芽,而OE-OsS40-14系表现出延迟发芽.
- 发现OsS40-14可以调节ABA信号,从而影响发芽.
- OsS40-14 直接抑制了 ABA 代谢基因 OsABA8ox1 和 OsABA8ox3 的转录,在休眠期间保持 ABA 水平.
结论:
- OsS40-14通过维持ABA恒温作用,作为水种子发芽的负调节剂.
- 了解OsS40-14的功能为开发耐PHS米品种提供了潜在的策略.
更多相关视频
08:52A Seed Coat Bedding Assay to Genetically Explore In Vitro How the Endosperm Controls Seed Germination in Arabidopsis thaliana
Published on: November 9, 2013
14.1K
06:28Preparation of Intact Tissue for Microscopic Analysis of the Endosperm Cell Layer in Developing and Mature Arabidopsis Seeds
Published on: May 16, 2025
1.1K
相关概念视频
01:17Gene Regulation During Sporulation
442
Sporulation is a complex developmental process that allows certain Gram-positive bacteria, such as Bacillus subtilis and Clostridium species, to survive extreme environmental conditions. This process is tightly regulated by a series of signaling cascades and transcriptional controls, ensuring the formation of a highly resistant endospore.Sporulation is triggered by unfavorable conditions, such as nutrient depletion, and is governed by a phosphorelay system. One of the sensor kinases, such as...
442
01:25Cell Signaling in Plants
6.1K
Plant cells communicate to coordinate their cycle of growth, flowering and fruiting, and activities in roots, shoots, and leaves in response to the changing environmental conditions. Plant signaling is distinct from animal signaling. Plants primarily utilize enzyme-linked receptors, whereas the largest class of cell-surface receptors in animals are G-protein coupled receptors (GPCRs). Unlike animals, receptor tyrosine kinases are rare in plants. Instead, plants have a diverse class of...
6.1K
02:41Responses to Drought and Flooding
11.9K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
11.9K