関連する実験動画
Updated: Jul 25, 2026

07:59
A Simple Chamber for Long-term Confocal Imaging of Root and Hypocotyl Development
Published on: May 17, 2017
まとめ
細胞壁の構造に不可欠な植物微小管は,ただ hoops ではなく,洋の根毛に螺旋状のパターンを形成することが判明しました. この発見により,植物細胞の形状と壁の質感におけるそれらの役割が明らかになった.
科学分野:
- 植物生物学 植物生物学
- 細胞生物学 細胞生物学
- 細胞骨格の研究
背景:
- 植物微小管の正確な配置と,細胞壁の構造への貢献は,まだ完全に理解されていません.
- 電子顕微鏡の薄い断面から細胞全体のマイクロチューブル構造を再構築することは,重大な課題を提示します.
- 微小管は,セルロースの微細繊維の堆積に影響を与え,植物細胞壁の質感に影響を及ぼすと仮定されています.
研究 の 目的:
- 細胞全体内の植物微小管のより高次元の組織を調査する.
- 許容される微小管の形状の範囲と,その細胞壁構造への影響を決定する.
- 植物細胞におけるマイクロチューブルのプロポーズされた螺旋状の配置に賛成または反対の証拠を提供すること.
主な方法:
- 全細胞免疫光顕微鏡を用いた.
- 重要なマイクロチューブルタンパク質であるチューブリンに特異的なモノクローナル抗体を採用した.
- フォルマルデヒドで固定されたオニオン根の毛細胞を検査した.
主要な成果:
- 洋の根毛細胞に微小管の曖昧な螺旋状の配置の存在を確認しました.
- マイクロチューブルが螺旋状の形状をとることができ,従来の"ループ"モデルに挑戦することを実証した.
- 細胞膨張の影響を受けた螺旋状に巻き上げられた微小管の仮説を支持する視覚的証拠を提供した.
結論:
- 植物微小管は螺旋状の形状を示し,植物細胞の組織を理解するのに大きく貢献しています.
- 微小管の螺旋状の配置は,セルロースの微細繊維がどのように堆積され,細胞壁の質感を形作るかに直接的な影響を及ぼします.
- この研究は,微小管組織の螺旋型のモデルと,細胞膨張のダイナミクスとの潜在的なリンクを検証しています.
関連する概念動画
Microtubules
There are three types of cytoskeletal structures in eukaryotic cells—microfilaments, intermediate filaments, and microtubules. With a diameter of about 25 nm, microtubules are the thickest of these fibers. Microtubules carry out a variety of functions that include cell structure and support, transport of organelles, cell motility (movement), and the separation of chromosomes during cell division.Microtubules are hollow tubes whose walls are made up of globular tubulin proteins. Each tubulin...
Microtubules
Microtubules are the thickest cytoskeletal filaments with a diameter of 25 nm. In prokaryotic organisms, microtubules are commonly found in locomotory appendages like cilia and flagella. In eukaryotic cells, microtubules form specialized extensions for moving fluid over the surface, like those found in cells lining the intestine.
Microtubules have two structurally similar globular protein subunits: α and β tubulins. In the cytosol, the α and β tubulins form a heterodimer. These αβ-heterodimers...
Microtubules have two structurally similar globular protein subunits: α and β tubulins. In the cytosol, the α and β tubulins form a heterodimer. These αβ-heterodimers...
Assembly of Complex Microtubule Structures
Complex microtubule structures are present in resting cells and in dividing cells. In resting cells, they are responsible for maintaining the cellular architecture, tracks for intracellular transport, positioning of organelles, assembly of cilia and flagella. They mediate the bipolar spindle assembly for chromosomal segregation and positioning of the cell division plate in dividing cells. The formation of microtubule complex structures depends on the cell type, cell stage, and cell function.
Microtubules in Cell Motility
Microtubules are thick hollow cylindrical proteins that help form the cytoskeleton. Microtubules have varied roles in the cell. These filaments help form cellular appendages like cilia and flagella, which are responsible for locomotion. The cilia arise from basal bodies, separated from the main body by a membrane-like structure forming the transition zone. This zone is the gate for the entry of lipids and proteins, creating a unique composition of lipids and proteins in the ciliary membrane and...
Microtubules in Signaling
The primary cilium, made up of microtubules, acts as antennae on the cell surfaces for relaying external stimuli into the cells. These fine hair-like structures are present, generally one per cell. These are non-motile cilia in a 9+0 microtubules arrangement, where the central pair of microtubules are absent. The primary cilia arise from the basal body embedded in the cell membrane. Intraflagellar transport (IFT) carries requisite proteins from the cytoplasm to the cilium because the primary...
Accessory Structures of the Skin: Hair and Hair Follicles
Hair and hair follicles are integral components of the integumentary system. Hair is a filamentous structure composed mainly of a protein called keratin. It is found on the surface of the skin throughout the body, except for areas such as the palms of the hands and soles of the feet.
Hair is a keratinous filament growing out of the epidermis. It is primarily made of dead, keratinized cells. Hair strands originate at the epidermal penetration called the hair follicle. The hair shaft is the part...
Hair is a keratinous filament growing out of the epidermis. It is primarily made of dead, keratinized cells. Hair strands originate at the epidermal penetration called the hair follicle. The hair shaft is the part...

