在阿拉比多普西斯根中形成卡斯帕带扩散屏障所需的激素
Takuya Nakayama1, Hidefumi Shinohara1, Mina Tanaka1
1Division of Biological Science, Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan.
Science (New York, N.Y.)
|January 21, 2017
概括
植物的根部使用卡斯帕尔带来矿物离子平衡. 新的硫化,CIF1和CIF2,对于形成这种屏障至关重要,确保适当的离子稳态.
科学领域:
- 植物生物学
- 分子植物科学
- 根部的发展
背景情况:
- 卡斯帕带是植物内皮细胞中的疏水屏障.
- 这种屏障对于调节矿物离子从土壤吸收到血管系统至关重要.
- 维持矿物离子平衡对于植物生长和生存至关重要.
研究的目的:
- 确定调节卡斯帕尔带形成的关键因素.
- 了解植物根中的离子稳态的分子机制.
- 调查激素在卡斯帕尔带完整性的作用.
主要方法:
- 在Arabidopsis thaliana进行基因分析.
- 新型激素的识别和表征.
- 对基因表达和蛋白质结合的分析.
- 对离子稳态缺陷的突变系的表型分析.
主要成果:
- 一个硫酸家族,卡斯帕利亚带完整性因子1 (CIF1) 和CIF2被确定为连续卡斯帕利亚带形成的必需物.
- CIF1和CIF2与受体激酶GASSHO1 (GSO1) / SCHENGEN3及其同类物GSO2结合.
- 缺少CIF的突变体表现出异构体中的离子稳定性受损.
- CIF基因表达是响应环境条件的.
结论:
- CIF是卡斯帕尔带的形成和功能的关键调节剂.
- CIF-GSO信号通路对于维持根离子平衡至关重要.
- 卡斯帕带调节是一个受环境因素影响的活跃过程,使植物能够适应土壤条件.
相关概念视频
02:34Water and Mineral Acquisition
36.1K
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.
36.1K
02:32Plasmodesmata
35.9K
The organs in a multicellular organism’s body are made up of tissues formed by cells. To work together cohesively, cells must communicate. One way that cells communicate is through direct contact with other cells. The points of contact that connect adjacent cells are called intercellular junctions.
35.9K
01:46The Apoplast and Symplast
54.8K
Plant growth depends on its ability to take up water and dissolved minerals from the soil. The root system of every plant is equipped with the necessary tissues to facilitate the entry of water and solutes. The plant tissues involved in the transport of water and minerals have two major compartments - the apoplast and the symplast. The apoplast includes everything outside the plasma membrane of living cells and consists of cell walls, extracellular spaces, xylem, phloem, and tracheids. The...
54.8K