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Related Concept Videos

Defenses Against Pathogens and Herbivores02:26

Defenses Against Pathogens and Herbivores

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Related Experiment Video

Updated: May 8, 2026

Bacterial Leaf Infiltration Assay for Fine Characterization of Plant Defense Responses using the Arabidopsis thaliana-Pseudomonas syringae Pathosystem
11:50

Bacterial Leaf Infiltration Assay for Fine Characterization of Plant Defense Responses using the Arabidopsis thaliana-Pseudomonas syringae Pathosystem

Published on: October 1, 2015

Flexible resource allocation during plant defense responses.

Jack C Schultz1, Heidi M Appel, Abigail P Ferrieri

  • 1Christopher S. Bond Life Sciences Center, University of Missouri Columbia, MO, USA.

Frontiers in Plant Science
|August 30, 2013
PubMed
Summary
This summary is machine-generated.

Plants reallocate resources like carbon and nitrogen during insect or pathogen attacks, creating a complex "tug of war" between plant defense and microbial needs. Understanding these whole-plant transport dynamics is crucial for plant fitness.

Keywords:
carbon allocationherbivorynitrogen allocationplant defensesequestration

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Area of Science:

  • Plant biology
  • Plant physiology
  • Ecology

Background:

  • Plants possess modular structures interconnected by xylem and phloem transport systems.
  • Attacks by insects and pathogens trigger defense responses and resource reallocation within attacked plant modules.
  • Resource movement, including proteins and carbohydrates, shifts during attacks, interpreted as a competition between plants and microbes.

Purpose of the Study:

  • To investigate the complex dynamics of resource translocation in plants under attack by insects and pathogens.
  • To understand how sink-source regulation influences the movement of critical resources like carbon and nitrogen in response to herbivory and infection.
  • To highlight the need for whole-plant research to assess the fitness consequences of altered resource transport.

Main Methods:

  • Review of existing research on resource reallocation and transport in plants.
  • Analysis of sink-source interactions and their regulation by factors like jasmonate.
  • Consideration of transport constraints including tissue connectivity, distance, and competing sinks.

Main Results:

  • Plants exhibit altered sink-source transport of carbon and nitrogen in response to attack.
  • Insects and jasmonate can enhance local sink strength, directing carbohydrates to support defense.
  • Resource movement in xylem is less understood but influenced by transpiration; roots play a key regulatory role.

Conclusions:

  • Resource translocation is a dynamic process influenced by attack type, plant physiology, and environmental factors.
  • Understanding the interplay between local defense and whole-plant resource allocation is critical.
  • Further whole-plant research is necessary to link observed transport changes to plant fitness outcomes.