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Related Concept Videos

MicroRNAs01:22

MicroRNAs

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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
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Defenses Against Pathogens and Herbivores02:26

Defenses Against Pathogens and Herbivores

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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.
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RNA Interference01:23

RNA Interference

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RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
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Types of RNA01:23

Types of RNA

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Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
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Defense Against Bacterial Pathogens01:31

Defense Against Bacterial Pathogens

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The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
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Antimicrobial Proteins01:23

Antimicrobial Proteins

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Antimicrobial proteins are important components of the immune system. They aid the body in combating pathogens by either killing them directly or hindering their replication processes. Four main types of antimicrobial substances are interferons, the complement system, iron-binding proteins, and antimicrobial proteins.
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Related Experiment Video

Updated: Jun 13, 2025

Potato Virus X-Based microRNA Silencing VbMS In Potato.
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Potato Virus X-Based microRNA Silencing VbMS In Potato.

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Plant microRNAs regulate the defense response against pathogens.

Changxin Luo1, Nawaz Haider Bashir1, Zhumei Li1

  • 1Center for Yunnan Plateau Biological Resources Protection and Utilization, College of Biological Resource and Food Engineering, Qujing Normal University, Qujing, China.

Frontiers in Microbiology
|September 16, 2024
PubMed
Summary

MicroRNAs (miRNAs) are key regulators in plant defense against pathogens. These small RNAs modulate gene expression and hormone signaling, enhancing plant immunity and disease resistance through cross-kingdom RNA silencing.

Keywords:
abiotic stressinteractionmicroRNAspathogensplant defense

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Related Experiment Videos

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RNA Blot Analysis for the Detection and Quantification of Plant MicroRNAs
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Area of Science:

  • Molecular Biology
  • Plant Science
  • Genetics

Background:

  • MicroRNAs (miRNAs) are small non-coding RNAs regulating gene expression post-transcriptionally.
  • MiRNAs are integral to plant growth, development, stress responses, and hormone signaling.
  • Plants employ diverse strategies to interact with microbes, including defense against pathogens.

Purpose of the Study:

  • To review the critical role of miRNAs in plant defense mechanisms against pathogens.
  • To elucidate how miRNAs control plant defense pathways.
  • To highlight miRNA involvement in plant-pathogen interactions.

Main Methods:

  • Literature review of scientific studies on miRNAs and plant-pathogen interactions.
  • Analysis of miRNA-mediated gene regulation in plant immunity.
  • Examination of miRNA roles in plant hormone signaling and cross-kingdom RNA silencing.

Main Results:

  • MiRNAs are central to regulating the plant's innate immune response.
  • MiRNAs modulate plant hormone pathways (salicylic acid, jasmonic acid, ethylene) during pathogen attacks.
  • MiRNAs exhibit cross-kingdom RNA silencing, enhancing plant disease resistance.

Conclusions:

  • MiRNAs are crucial regulators of plant defense against pathogens.
  • Understanding miRNA function is essential for improving plant disease resistance.
  • Further research into miRNA roles in plant-pathogen interactions is warranted.