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Related Concept Videos

Stem Cell Niche01:26

Stem Cell Niche

The stem cell niche is the dynamic microenvironment where stem cells reside. Inside these niches, the cells may remain undifferentiated, undergo high self-renewal, or become lineage-specific progenitors. Stem cells coexist with other niche cells, such as stromal cells. They also interact closely with the ECM. Cell-cell and cell-matrix communication occur via adhesion molecules or soluble factors that signal the stem cells and determine their fate. Stromal cells also provide survival signals to...
Multipotency and Niche of Bulge Stem Cell01:06

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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...
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Multipotency of Hematopoietic Stem Cells

The hematopoietic stem cells or HSCs are multipotent, meaning they can differentiate and give rise to all blood and immune cells. HSCs are maintained in the quiescent stage until an external stimulus initiates their differentiation. The multipotent HSCs exist as two heterogeneous populations, long-term repopulating cells (LTRC) and short-term repopulating cells (STRC). The two HSC populations have different surface markers or receptors and are classified based on quiescence and long-term...
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Stem cells are undifferentiated cells that divide and produce more stem cells or progenitor cells that differentiate into mature, specialized cell types. All the cells in the body are generated from stem cells in the early embryo, but small populations of stem cells are also present in many adult tissues including the bone marrow, brain, skin, and gut. These adult stem cells typically produce the various cell types found in that tissue—to replace cells that are damaged or to continuously renew...
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Primary and Secondary Growth in Roots and Shoots

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.
Meristems and Plant Growth02:36

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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.

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Updated: May 24, 2026

Isolation and Identification of Limbal Niche Cells
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Published on: October 27, 2023

Plant stem cell niches.

Ernst Aichinger1, Noortje Kornet, Thomas Friedrich

  • 1BIOSS Centre for Biological Signalling Studies, Faculty of Biology, University of Freiburg, Freiburg, Germany.

Annual Review of Plant Biology
|March 13, 2012
PubMed
Summary
This summary is machine-generated.

Plant stem cell niches maintain pluripotency, balancing cell fates through mobile signals. This review explores models of plant stem cell regulation and niche differences in Arabidopsis thaliana.

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Area of Science:

  • Plant biology
  • Developmental biology
  • Molecular genetics

Background:

  • Multicellular organisms rely on stem cells for development, repair, and regeneration.
  • Stem cells reside in specialized niches that prevent differentiation.
  • Plants possess distinct stem cell niches in shoot, root, and vascular meristems for continuous organ formation.

Purpose of the Study:

  • To review current models of plant stem cell regulation.
  • To examine the role of mobile signals in balancing cell fates.
  • To compare distinct stem cell niches in Arabidopsis thaliana.

Main Methods:

  • Literature review of plant stem cell research from the past two decades.
  • Focus on the model plant Arabidopsis thaliana.
  • Analysis of transcriptional modules and mobile signaling pathways.

Main Results:

  • Identification of key regulatory networks balancing stem cell pluripotency and differentiation.
  • Elucidation of mobile signals influencing transcriptional modules.
  • Comparison of conserved and unique features across different plant stem cell niches.

Conclusions:

  • Plant stem cell niches are crucial for lifelong growth and organogenesis.
  • Mobile signals play a significant role in maintaining stem cell homeostasis.
  • Understanding these mechanisms in Arabidopsis provides insights into plant development.