相关实验视频
Updated: Jul 7, 2025

09:23
Lateral Root Inducible System in Arabidopsis and Maize
Published on: January 14, 2016
13.8K
在高盐度下,根的分支需要对LATERAL ORGAN BOUNDARY DOMAIN 16的功能调节
Yanxia Zhang1,2,3, Yiyun Li1, Thijs de Zeeuw1
1Laboratory of Plant Physiology, Wageningen University & Research, 6708 PB Wageningen, The Netherlands.
The Plant cell
|December 23, 2023
概括
盐应激通过抑制辅酶信号来阻碍横向根 (LR) 的生长. 然而,另一种途径激活了ARABIDOPSIS THALIANA 6 (ZAT6) 的指,这促进了在盐水条件下LR的发展.
科学领域:
- 植物生物学 植物生物学
- 分子生物学分子生物学
- 压力生理学 压力生理学
背景情况:
- 盐度压力通过限制横向根 (LR) 发育,显著抑制植物生长.
- 辅酶信号对于LR形成至关重要,但盐度影响根辅酶信号的精确分子机制尚不清楚.
- 侧面器官边界域16 (LBD16) 转录因子对于正常情况下的LR发育至关重要.
研究的目的:
- 阐明盐度影响Arabidopsis thaliana根辅酶信号传递和LR发育的分子机制.
- 在高盐条件下确定调节LBD16表达的替代途径.
- 了解盐激活通路如何与辅酶信号集成以调节根枝分支.
主要方法:
- 在高盐条件下研究基因表达模式.
- 利用分子遗传学技术研究了阿拉比多普西斯的指THALIANA 6 (ZAT6) 和LBD16.6的作用.
- 分析了对细胞壁重塑和LR发育的下游影响.
主要成果:
- 高盐的条件抑制了通常调节LR发育的auxin信号通路.
- 与此同时,盐分通过辅素独立途径激活ZAT6,这是LBD16的转录激活剂.
- 通过ZAT6介导的LBD16激活促进细胞壁重塑,并在盐应激下促进LR发育.
结论:
- 在高盐条件下,根部的发育是通过整合素依赖的抑制通路和盐激活的素独立通路来调节的,这些通路汇聚在LBD16上.
- 这项研究揭示了一种新的盐度耐受性机制,涉及ZAT6介导LBD16的激活,尽管抑制了auxin信号,但促进了LR的生长.
相关概念视频
Responses to Salt Stress
13.1K
Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
13.1K
Cell Signaling in Plants
5.6K
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...
5.6K
Primary and Secondary Growth in Roots and Shoots
57.2K
Vascular plants, which account for over 90% of the Earth’s vegetation, all undergo primary growth—which lengthens roots and shoots. Many land plants, notably woody plants, also undergo secondary growth—which thickens roots and shoots.
57.2K
Morphogenesis
28.2K
Plant morphogenesis—the development of a plant’s form and structure—involves several overlapping developmental processes, including growth and cell differentiation. Precursor cells differentiate into specific cell types, which are organized into the tissues and organ systems that make up the functional plant.
28.2K
Regulation of Transpiration by Stomata
28.3K
During photosynthesis, plants acquire the necessary carbon dioxide and release the produced oxygen back into the atmosphere. Openings in the epidermis of plant leaves is the site of this exchange of gasses. A single opening is called a stoma—derived from the Greek word for “mouth.” Stomata open and close in response to a variety of environmental cues.
28.3K
Water and Mineral Acquisition
33.1K
Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching patterns that facilitate this process. The outermost root cells have specialized structures called root hairs that increase the root surface, thus increasing soil contact. Water can passively cross into roots, as the concentration of water in the soil is higher than that of the root tissue. Minerals, in contrast, are actively transported into root cells.
33.1K

