PHABULOSAとPHAVOLUTAの役割 芽の放射線パターンを決定する
J R McConnell1, J Emery, Y Eshed
1Department of Genetics, University of Wisconsin-Madison, 53706, USA.
Nature
|June 8, 2001
まとめ
アラビドプシス PHABULOSAとPHAVOLUTAの遺伝子は,葉の極性にとって極めて重要です. これらの遺伝子の変異により,下部 (アバキシアル) の葉の側面は上部 (アダキシアル) に変化し,位置情報を感知する役割を示しています.
科学分野:
- 植物生物学 植物生物学
- 発達生物学 発達生物学とは
- 遺伝学 遺伝学とは
背景:
- アンジオスペルムの葉の側面には特殊な機能があり,上部は日光のために,下部はガス交換のためにあります.
- アラビドプシスの葉の極性 (アダキシアル/アバキシアル) は,おそらく植物内の位置情報に依存する.
- 葉のアダキシアル細胞は中央から発芽し,アバキシアル細胞は芽の周辺から発芽する.
研究 の 目的:
- アラビドプシス PHABULOSA (PHB) とPHAVOLUTA (PHV) 遺伝子の放射線位置情報知覚における役割を調査する.
- これらの遺伝子が葉のアダキシアル-アバキシアル極性をどのように確立するのかを理解する.
主な方法:
- アラビドプシスの支配的なファブルスラ (phb) とファヴォルタ (phv) 変異の分析.
- ATHB14およびATHB9タンパク質ドメインの変化を調べる.
主要な成果:
- 支配的なphbおよびphv変異は,葉の軸向から軸向の運命を変化させます.
- 変異により,ATHB14およびATHB9タンパク質のステロール/脂質結合ドメインが変化する.
- 変化したドメインは,構成タンパク質の活性化につながる可能性が高い.
結論:
- PHBとPHVのタンパク質は,アダキシアライジング信号の受容体として作用する.
- ステロール/脂質結合ドメインはPHB/PHVタンパク質機能の重要な調節因子である.
- これらの遺伝子は,葉の原始体における放射位置情報を確立する上で極めて重要です.
関連する概念動画
Photosystem II
59.9K
The multi-protein complex photosystem II (PS II) harvests photons and transfers their energy through its bound pigments to its reaction center, and ultimately to photosystem I (PSI) through the electron transport chain. The pigments responsible for caputirng the light energy in photosystems include chlorophyll a, chlorophyll b, and carotenoids.
The pigment molecules are arranged across two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment...
The pigment molecules are arranged across two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment...
59.9K
Photoreceptors and Plant Responses to Light
22.5K
Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
22.5K
The Antenna Complex
6.9K
Plants and other photosynthetic organisms comprise pigments capable of absorption of direct sunlight. These pigments are present in the reaction center - the main site of photochemical reactions as well as in the antenna complex. Under average light conditions, the rate at which reaction center pigments absorb light is far below the electron transport chain's capacity. As a result, the reaction center alone cannot provide enough energy to drive photosynthesis. The photosynthetic efficiency can...
6.9K
Photoluminescence: Fluorescence and Phosphorescence
5.6K
Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
A pair of electrons in a...
5.6K
Variables Affecting Phosphorescence and Fluorescence
3.9K
Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...
3.9K
Photoluminescence: Applications
1.3K
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
1.3K


