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Related Concept Videos

Peroxisomes01:24

Peroxisomes

Peroxisomes are specialized organelles present in fungi, plant, and animal cells. It can vary in number, size, morphology, and activity depending on the type of tissue and the nutritional state of the cell. For example, cells with active lipid metabolism, such as adipocytes, neurons, and hepatocytes, have more peroxisomes than other cells in the body. Besides their primary role in breaking down complex organic molecules, peroxisomes can also synthesize specific macromolecules and participate in...
Peroxisomes and Mitochondria01:30

Peroxisomes and Mitochondria

Peroxisomes and mitochondria are two important oxygen-utilizing organelles in eukaryotic cells. Mitochondria carry out cellular respiration—the process that converts energy from food into ATP. Peroxisomes carry out a variety of functions, primarily breaking down different substances, such as fatty acids.
The peroxisome is a single membrane-bound cellular organelle that can perform several different functions, including lipid metabolism and chemical detoxification. The enzymes within peroxisomes...
Peroxisomes01:24

Peroxisomes

Peroxisomes are specialized organelles present in fungi, plant, and animal cells. It can vary in number, size, morphology, and activity depending on the type of tissue and the nutritional state of the cell. For example, cells with active lipid metabolism, such as adipocytes, neurons, and hepatocytes, have more peroxisomes than other cells in the body. Besides their primary role in breaking down complex organic molecules, peroxisomes can also synthesize specific macromolecules and participate in...
Microbe-Plant Interactions01:09

Microbe-Plant Interactions

Microbe-plant interactions represent a dynamic spectrum of associations shaped by intricate chemical signaling. These interactions can be neutral, beneficial, or detrimental, and profoundly influence plant physiology, growth, and ecosystem function. The plant microbiome, comprising bacteria, fungi, archaea, protists, and viruses, plays a pivotal role in mediating these effects through surface colonization, internal colonization, or systemic symbiosis.Mutualistic associations, particularly with...
Defenses Against Pathogens and Herbivores02:26

Defenses Against Pathogens and Herbivores

Plants present a rich source of nutrients for many organisms, making it a target for herbivores and infectious agents. Plants, though lacking a proper immune system, have developed an array of constitutive and inducible defenses to fend off these attacks.
Protein Import into the Peroxisomes01:27

Protein Import into the Peroxisomes

Cells contain membrane-bound organelles called peroxisomes that oxidize organic molecules by transferring hydrogen atoms to oxygen, producing hydrogen peroxide. Peroxisomes enzymatically convert the released hydrogen peroxide into water and oxygen.
Peroxisomal Protein Import:
Peroxisomes lack the genetic machinery required to code for their own proteins. Hence, most peroxisomal membrane, lumenal and transmembrane proteins are synthesized in the cytoplasm or ER and transported to the peroxisome...

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Related Experiment Video

Updated: May 10, 2026

Bacterial Leaf Infiltration Assay for Fine Characterization of Plant Defense Responses using the Arabidopsis thaliana-Pseudomonas syringae Pathosystem
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Function of peroxisomes in plant-pathogen interactions.

Yasuyuki Kubo1

  • 1Laboratory of Plant Pathology, Graduate School of Life and Environmental Sciences, Kyoto, 606-8522, Japan, y_kubo@kpu.ac.jp.

Sub-Cellular Biochemistry
|July 4, 2013
PubMed
Summary

Peroxisomes and their related functions, including pexophagy and metabolic pathways like beta-oxidation, are crucial for the pathogenesis of many plant-infecting fungi. Disruptions in these processes impair fungal disease development.

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Area of Science:

  • Fungal Pathogenesis
  • Cell Biology
  • Biochemistry

Background:

  • Peroxisomes are vital eukaryotic organelles involved in diverse metabolic processes.
  • Peroxisome-related functions, including biogenesis and degradation (pexophagy), are increasingly recognized for their role in plant pathogenic fungi.
  • Specific metabolic pathways like beta-oxidation and the glyoxylate cycle occur within peroxisomes.

Purpose of the Study:

  • To review and demonstrate the essential roles of peroxisome-related factors in the pathogenesis of plant pathogenic fungi.
  • To highlight the significance of peroxisome biogenesis, pexophagy, and associated metabolic pathways in fungal disease development.
  • To consolidate information on how peroxisome functions contribute to the virulence of fungi like *Colletotrichum orbiculare* and *Magnaporthe oryzae*.

Main Methods:

  • Review of existing literature on peroxisome functions in plant pathogenic fungi.
  • Analysis of gene-disrupted mutants (*Colletotrichum orbiculare*, *Magnaporthe oryzae*) to assess pathogenesis defects.
  • Examination of the roles of peroxisome-related organelles (e.g., Woronin body) and metabolic pathways in fungal virulence.

Main Results:

  • Gene mutants lacking peroxins or defective in pexophagy exhibit reduced pathogenesis in *C. orbiculare* and *M. oryzae*.
  • The Woronin body, linked to fungal stress tolerance, plays a key role in *M. oryzae* pathogenesis.
  • Peroxisome-dependent metabolic pathways (beta-oxidation, glyoxylate cycle) and secondary metabolism (melanin, toxins) are critical for the pathogenicity of various plant fungi.

Conclusions:

  • Peroxisome biogenesis, pexophagy, and associated metabolic activities are indispensable for the pathogenic development of numerous plant pathogenic fungi.
  • Understanding these peroxisomal roles provides insights into fungal virulence mechanisms and potential targets for disease control.
  • Secondary metabolism, often linked to peroxisomal functions, significantly contributes to the virulence of fungal pathogens.