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Related Concept Videos

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C4 Pathway and CAM

Most plants use the C3 pathway for carbon fixation. However, some plants, such as sugar cane, corn, and cacti that grow in hot conditions, use alternative pathways to fix carbon and conserve energy loss due to photorespiration. Photorespiration is the process that occurs when the oxygen concentration is high. Under such conditions, the rubisco enzyme in the Calvin cycle binds O2 instead of CO2, which halts photosynthesis and consumes energy.
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Microtubules are small hollow tubes in eukaryotic cells. The cell wall microtubules are polymerized dimers of two globular proteins, α-tubulin and β-tubulin, two globular proteins. With a diameter of about 25 nm, microtubules are the widest components of the cytoskeleton. They help the cell resist compression and provide a track along which vesicles move through the cell or pull replicated chromosomes to opposite ends of a dividing cell. Microtubules go through quick cycles of disassembly and...
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Related Experiment Video

Updated: Jun 19, 2026

A Strategy to Validate the Role of Callose-mediated Plasmodesmal Gating in the Tropic Response
12:18

A Strategy to Validate the Role of Callose-mediated Plasmodesmal Gating in the Tropic Response

Published on: April 17, 2016

Callose synthesis in higher plants.

Xiong-Yan Chen1, Jae-Yean Kim

  • 1Division of Applied Life Science (BK21 and WCU program), Graduate School of Gyeongsang National University, Plant Molecular Biology and Biotechnology Research Center, Environmental Biotechnology National Core Research Center, Jinju, Korea.

Plant Signaling & Behavior
|October 10, 2009
PubMed
Summary
This summary is machine-generated.

Callose, a plant cell wall polysaccharide, is synthesized by callose synthases and degraded by beta-1,3-glucanases. Recent studies in Arabidopsis are revealing the molecular mechanisms of callose biosynthesis and degradation.

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Last Updated: Jun 19, 2026

A Strategy to Validate the Role of Callose-mediated Plasmodesmal Gating in the Tropic Response
12:18

A Strategy to Validate the Role of Callose-mediated Plasmodesmal Gating in the Tropic Response

Published on: April 17, 2016

High Resolution Quantification of Crystalline Cellulose Accumulation in Arabidopsis Roots to Monitor Tissue-specific Cell Wall Modifications
09:27

High Resolution Quantification of Crystalline Cellulose Accumulation in Arabidopsis Roots to Monitor Tissue-specific Cell Wall Modifications

Published on: May 10, 2016

Area of Science:

  • Plant Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Callose is a beta-1,3-glucan polysaccharide found in higher plant cell walls.
  • It plays critical roles in plant development and stress responses.
  • Callose synthesis and degradation are mediated by beta-1,3-glucanases and callose synthases, respectively.

Purpose of the Study:

  • To review recent advancements in understanding callose biosynthesis and degradation.
  • To highlight molecular and genetic studies in Arabidopsis.
  • To discuss challenges in elucidating callose synthase mechanisms.

Main Methods:

  • Literature review of molecular and genetic studies.
  • Focus on research in the model plant Arabidopsis thaliana.
  • Analysis of gene functions related to callose metabolism.

Main Results:

  • Identification of key genes involved in callose biosynthesis and degradation in Arabidopsis.
  • Progress in understanding the enzymatic activities and regulation of callose synthases.
  • Elucidation of the roles of specific beta-1,3-glucanases in callose breakdown.

Conclusions:

  • Significant strides have been made in unraveling the molecular basis of callose metabolism.
  • Further research is needed to fully understand the operational mechanisms of callose synthases.
  • Callose's complex roles in plant life warrant continued investigation.