協同的水力学は,単細胞の体における多細胞型のコロニーの組織に伴います
Shashank Shekhar1,2,3, Hanliang Guo4,5, Sean P Colin2,6
1Departments of Physics, Cell Biology and Biochemistry, Emory University, Atlanta, USA.
Nature physics
|September 2, 2025
まとめ
単細胞生物におけるコロニーの組織は,水力学的な結合によって栄養の効率を高めます. 個体同士の交配は 単独の栄養流が弱くなり 初期の多細胞進化の 洞察力を提供します
科学分野:
- 進化生物学
- プロティストロジー
- 水力学
背景:
- 多細胞性の進化は 生命の歴史における重要な出来事です
- 多細胞性は 栄養素の吸収と防御の改善のような利点をもたらします
- 単細胞生物から多細胞生物への移行を理解するには,一時的なコロニーを形成する生物を研究する必要があります.
研究 の 目的:
- 単細胞のプロティストのコロニアル組織の利点を調査する.
- コロニアル・プロティストの栄養に,水力学的相互作用がどのように影響するかを決定する.
- 多細胞性の初期進化を駆動する 選択的な力を探求すること
主な方法:
- 短命なコロニーの形成で知られている原生体であるStentor coeruleusを使用した.
- 隣接する個体間の水力学的結合を分析した.
- 測定された餌の流れとその個体間の分離への依存.
主要な成果:
- 隣接する *Stentor* 個体間の水力学的結合は,餌の流れを強化します.
- 餌の流れの改善は 個体間の距離に依存する.
- 非対称的な利益が生じます 弱く孤独な餌食動物はコロニーの集団からより多くの利益を得ます
結論:
- コロニアル組織は単細胞生物に 重要な栄養上の利点をもたらします
- ダイナミックなコロニアル構造は選択的に有利であり,多細胞性の進化を促進します.
- この研究は 多細胞生物への移行を促す 根本的な洞察力を提供します
関連する概念動画
01:16Cell Motility through Blebbing
2.0K
Blebs are a type of membrane protrusion formed by the internal hydrostatic pressure of the cytoplasm. Blebs are observed in several cell types, including fibroblasts, immune cells, and single-celled organisms like the amoeba. The primary function of blebs is cell locomotion and apoptosis, but they are also found during necrosis and cell division. The life cycle of a bleb comprises an initiation phase followed by the expansion and retraction phases.
Blebbing Through the Matrix
In multicellular...
Blebbing Through the Matrix
In multicellular...
2.0K
01:27Diversity of Protists II
132
Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...
132
01:29Exocrine Glands: Unicellular and Multicellular Glands
18.1K
Exocrine glands are classified as unicellular and multicellular. The unicellular glands are scattered single cells, such as goblet cells, found in the mucous membranes of the small and large intestines. On the other hand, multicellular exocrine glands develop as secretory sheets, like the internal lining of the abdomen or chest. Such secretory sheets release their secretions directly into the lumen of these organs. In addition, some multicellular glands have deep-seated secretory units to...
18.1K
01:27Diversity of Protists IV
118
Amoebozoa represent a diverse group of terrestrial and aquatic protists that utilize lobe-shaped pseudopodia for locomotion and feeding. This characteristic differentiates them from the Rhizaria, which possess threadlike pseudopodia. The primary classifications within Amoebozoa include gymnamoebas, entamoebas, and the plasmodial and cellular slime molds. Phylogenetic evidence indicates that Amoebozoa diverged from a lineage that ultimately gave rise to fungi and animals.Gymnamoebas and...
118
01:06Multipotency and Niche of Bulge Stem Cell
3.8K
A hair follicle or HF is a small part of the skin that produces the hair shaft. Paul Gerson Unna was the first to observe a bulge in the human hair follicle's outer root sheath (ORS). The bulge is present between the sebaceous gland and the arrector pili muscle and is the niche for hair follicle stem cells (HFSCs). The bulge is also a niche for melanocyte stem cells, and their loss results in graying of hair. The HFSCs express Sox9 and Lhx2, which help them maintain stemness and prevent...
3.8K
01:32Cytoskeletal Coordination in Cell Migration
4.9K
A migrating cell changes its shape during the cyclic events of attachment and detachment from the substratum and repositions the cell organelles correspondingly. These complex events are orchestrated by the dynamic cytoskeletal network comprising actin filaments, intermediate filaments, and microtubules. Cytoskeletal crosstalk — the direct and indirect communication between the different components — is crucial for this coordination. Direct communication involves various linker...
4.9K