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Related Concept Videos

Chromatin Modification in iPS Cells01:32

Chromatin Modification in iPS Cells

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Chromatin modification alters gene expression; therefore, scientists can add histone-modifying enzymes, histone variants, and chromatin remodeling complexes to somatic cells to aid reprogramming into pluripotent stem (iPS) cells.
Compact chromatin makes reprogramming difficult. Enzymes, such as histone demethylases and acetyltransferases, are often added during reprogramming to loosen the chromatin, making the DNA more accessible to transcription factors. Molecules that inhibit histone...
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Inheritance of Chromatin Structures03:17

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Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
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Heterochromatin02:38

Heterochromatin

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The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions that take up more dye are called heterochromatin. Heterochromatin is further classified into two forms – constitutive heterochromatin and facultative heterochromatin.
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Spermatogenesis01:41

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Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male...
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Spermatogenesis01:22

Spermatogenesis

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Spermatogenesis is a complex process that involves the development of sperm cells from undifferentiated stem cells in the seminiferous tubules of the testes. The process is essential for the production of mature and functional sperm cells that are capable of fertilizing an egg.
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Euchromatin01:01

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The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions take up more dye, appearing darker, while the less-compact areas take up less dye and appear lighter. Based on the compaction level, chromatins are classified into two primary forms – euchromatin and heterochromatin.
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Related Experiment Video

Updated: Apr 14, 2026

An Efficient Method for Quantitative, Single-cell Analysis of Chromatin Modification and Nuclear Architecture in Whole-mount Ovules in Arabidopsis
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Chromatin remodelling during male gametophyte development.

Michael Borg1, Frédéric Berger1

  • 1Gregor Mendel Institute, Vienna Biocenter, Dr. Bohr-Gasse 3, 1030, Vienna, Austria.

The Plant Journal : for Cell and Molecular Biology
|April 21, 2015
PubMed
Summary

Plant male gametophyte development involves distinct chromatin changes. Histone variants dynamically regulate gene expression, sperm cell compaction, and post-fertilization events.

Keywords:
chromatinepigeneticshistone variantsmale gametophytepollensperm cells

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Area of Science:

  • Plant reproductive biology
  • Epigenetics
  • Molecular biology

Background:

  • The plant life cycle involves alternating sporophytic and gametophytic phases.
  • Male gametophyte development produces a pollen grain with two sperm cells and a vegetative cell.
  • Sperm and vegetative cells display contrasting chromatin organization: condensed and diffuse, respectively.

Purpose of the Study:

  • To review the role of histone variant dynamics in plant male gametophyte development.
  • To explore the link between histone variants, chromatin reprogramming, and sperm cell genome compaction.
  • To understand the impact of these processes on post-fertilization zygotic transitions.

Main Methods:

  • Review of existing literature on plant reproductive biology and epigenetics.
  • Analysis of studies on histone variant expression and function in male gametophytes.
  • Integration of findings related to chromatin structure and gene regulation.

Main Results:

  • Histone variants exhibit dynamic and differential expression patterns in sperm and vegetative cells.
  • These dynamics are crucial for reprogramming chromatin activities within the male gametophyte.
  • Histone variant regulation influences sperm cell genome compaction and subsequent zygotic development.

Conclusions:

  • Histone variant dynamics are a key regulatory mechanism in plant male gametophyte development.
  • Understanding these epigenetic modifications is essential for comprehending plant fertilization and early embryogenesis.
  • Targeting histone variant pathways could offer insights into improving plant reproductive success.