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Related Concept Videos

Gene Regulation During Sporulation01:17

Gene Regulation During Sporulation

Sporulation is a complex developmental process that allows certain Gram-positive bacteria, such as Bacillus subtilis and Clostridium species, to survive extreme environmental conditions. This process is tightly regulated by a series of signaling cascades and transcriptional controls, ensuring the formation of a highly resistant endospore.Sporulation is triggered by unfavorable conditions, such as nutrient depletion, and is governed by a phosphorelay system. One of the sensor kinases, such as...
Endospores and Sporulation01:20

Endospores and Sporulation

Endospores are specialized, dormant cells primarily formed by Gram-positive bacteria, including Bacillus and Clostridium, enabling survival under extreme environmental conditions. Due to their unique composition and formation process, these structures are highly resistant to physical and chemical insults, such as extreme heat, ultraviolet and ionizing radiation, desiccation, and toxic chemicals. Rare instances of endospore-like structures have also been observed in some Gram-negative bacteria,...
Transcription Attenuation in Prokaryotes02:42

Transcription Attenuation in Prokaryotes

Transcriptional attenuation occurs when RNA transcription is prematurely terminated due to the formation of a terminator mRNA hairpin structure.  Bacteria use these hairpins to regulate the transcription process and control the synthesis of several amino acids including histidine, lysine, threonine, and phenylalanine. Transcription attenuation takes place in the non-coding regions of mRNA.
There are several different mechanisms used to attenuate transcription. In ribosome mediated...
Transcription01:10

Transcription

Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...

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Related Experiment Video

Updated: Jun 16, 2026

Investigating Tissue- and Organ-specific Phytochrome Responses using FACS-assisted Cell-type Specific Expression Profiling in Arabidopsis thaliana
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Investigating Tissue- and Organ-specific Phytochrome Responses using FACS-assisted Cell-type Specific Expression Profiling in Arabidopsis thaliana

Published on: May 29, 2010

Transcriptomic changes arising during light-induced sporulation in Physarum polycephalum.

Israel Barrantes1, Gernot Glockner, Sonja Meyer

  • 1Max Planck Institute for Dynamics of Complex Technical Systems and Magdeburg Centre for Systems Biology (MaCS), Otto von Guericke University, Magdeburg, Germany.

BMC Genomics
|February 19, 2010
PubMed
Summary
This summary is machine-generated.

Light-induced sporulation in Physarum polycephalum involves differential gene expression. Key upregulated genes relate to cell death and differentiation, while downregulated genes are linked to DNA repair and cell division.

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Last Updated: Jun 16, 2026

Investigating Tissue- and Organ-specific Phytochrome Responses using FACS-assisted Cell-type Specific Expression Profiling in Arabidopsis thaliana
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Published on: October 22, 2018

Area of Science:

  • Cell Biology
  • Developmental Biology
  • Molecular Biology

Background:

  • Physarum polycephalum, a model organism, exhibits a complex life cycle with cell differentiation via sporulation.
  • Sporulation can be triggered by external factors and involves metazoan-like signaling pathways.

Purpose of the Study:

  • To identify genes involved in light-induced sporulation in Physarum.
  • To understand the signal transduction pathways regulating this process.

Main Methods:

  • RNA isolation from sporulation-competent cells before and after light induction.
  • cDNA synthesis and analysis using 454 sequencing technology.
  • Bioinformatic analysis including transcript annotation and differential expression analysis.

Main Results:

  • 16,669 cDNAs were sequenced and annotated.
  • 2,772 transcripts showed significant differential expression (1,623 upregulated, 1,149 downregulated).
  • Putative gene networks were constructed using ortholog interaction information.

Conclusions:

  • Downregulated genes are associated with DNA repair, cell division, and migration inhibition.
  • Upregulated genes are linked to cell death, polarization, integrity, and differentiation.
  • Differential gene regulation, particularly of actin-binding proteins, underlies light-induced sporulation.