TMK1媒介のオキシンシグナリングは,アピカルフックの微分成長を調節する
Min Cao1,2,3, Rong Chen1, Pan Li1,2,3
1Shanghai Center for Plant Stress Biology, Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, China.
Nature
|April 5, 2019
まとめ
定規のTIR1/AFB経路とは異なる新しいオキシンシグナル伝達経路が,植物の成長を調節する. このメカニズムは,オクシンレベルに基づいてアピカルフックの発達を制御するために,Aux/IAA抑制器を安定させるTMK1を含む.
科学分野:
- 植物生物学
- 分子信号
- 発達生物学
背景:
- 植物ホルモンのオクシンは 植物の成長と発達に不可欠です
- アクシン濃度は変化し,様々な結果をもたらすが,そのメカニズムは不明である.
- カノニカルオキシンシグナル伝達にはTIR1/AFB受容体が関与する.
研究 の 目的:
- 新しいオキシンシグナルメカニズムを特定する.
- アピカルフック発達の過程における 微分成長を理解する.
- アクシン濃度が 異なる発達結果にどのように変換されるかを説明する.
主な方法:
- アクシンシグナリングをアピカルフック開発で調査した.
- オーキシン媒介によるC末端分裂におけるTMK1の役割を特定した.
- TMK1,IAA32,IAA34,およびARF転写因子の間の相互作用を分析した.
主要な成果:
- TIR1/AFBに並行してオクシン-TMK1の信号伝達経路を発見した.
- この経路は,非正規のAux/IAA抑制器 (IAA32,IAA34) を安定させる.
- この経路は,高レベルのオクシンによって誘発され,頂点のの側で動作します.
結論:
- オクシン-TMK1経路は,オクシンシグナル伝達のための並列メカニズムを提供します.
- 複合的な発達のためのオクシン濃度の異なる解釈を可能にします.
- この経路はAux/IAA抑制剤を安定させ,正規経路とは対照的に成長を抑制する.
関連する概念動画
Hooke's Law
1.5K
Hooke's law, a pivotal principle in material science, establishes that the strain a material undergoes is directly proportional to the applied stress, defined by a factor called the modulus of elasticity or Young's modulus.
1.5K
Primary and Secondary Growth in Roots and Shoots
60.3K
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.
60.3K
Generalized Hooke's Law
2.7K
The generalized Hooke's Law is a broadened version of Hooke's Law, which extends to all types of stress and in every direction. Consider an isotropic material shaped into a cube subjected to multiaxial loading. In this scenario, normal stresses are exerted along the three coordinate axes. As a result of these stresses, the cubic shape deforms into a rectangular parallelepiped. Despite this deformation, the new shape maintains equal sides, and there is a normal strain in the direction of the...
2.7K
Assessment of apical pulse
2.0K
Assessing the Apical Pulse
Assessing the apical pulse is a critical nursing procedure, particularly indicated for:
Assessing the apical pulse is a critical nursing procedure, particularly indicated for:
2.0K
Regulated Protein Degradation
8.8K
It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells.
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
Protein degradation plays two important roles in the cells. It helps to protect cells from misfolded or damaged proteins before they lead to a...
8.8K
Meristems and Plant Growth
49.4K
Plants grow throughout their lives; this is called indeterminate growth, and it distinguishes plants from most animals. Although certain parts of plants stop growing (e.g., leaves and flowers), others grow continuously—like roots and stems.
49.4K


