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Related Concept Videos

Plant Hormones01:56

Plant Hormones

Plant hormones—or phytohormones—are chemical molecules that modulate one or more physiological processes of a plant. In animals, hormones are often produced in specific glands and circulated via the circulatory system. However, plants lack hormone-producing glands.
Plant Hormones01:56

Plant Hormones

Plant hormones—or phytohormones—are chemical molecules that modulate one or more physiological processes of a plant. In animals, hormones are often produced in specific glands and circulated via the circulatory system. However, plants lack hormone-producing glands.
Cell Signaling in Plants01:25

Cell Signaling in Plants

Plant cells communicate to coordinate their cycle of growth, flowering and fruiting, and activities in roots, shoots, and leaves in response to the changing environmental conditions. Plant signaling is distinct from animal signaling. Plants primarily utilize enzyme-linked receptors, whereas the largest class of cell-surface receptors in animals are G-protein coupled receptors (GPCRs). Unlike animals, receptor tyrosine kinases are rare in plants. Instead, plants have a diverse class of...
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...
Morphogenesis02:19

Morphogenesis

Plant morphogenesis—the development of a plant’s form and structure—involves several overlapping developmental processes, including growth and cell differentiation. Precursor cells differentiate into specific cell types, which are organized into the tissues and organ systems that make up the functional plant.
Target Cell Response to Hormones01:22

Target Cell Response to Hormones

Hormones intricately bind to receptors on the surface or within target cells, initiating a cascade of cellular responses.
Notably, the cellular response can be regulated by altering the number of receptors expressed in the cell. For example, prolonged exposure to elevated hormone levels results in a gradual decline or down-regulation in the number of receptors for that specific hormone on the cell surface. Conversely, in response to low hormone levels, cells may use up-regulation, producing an...

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Related Experiment Video

Updated: Jun 5, 2026

Monitoring Plant Hormones During Stress Responses
11:01

Monitoring Plant Hormones During Stress Responses

Published on: June 15, 2009

Plant hormone interactions: how complex are they?

John J Ross1, Diana E Weston, Sandra E Davidson

  • 1School of Plant Science, University of Tasmania, Private Bag 55, Hobart, Tasmania 7001, Australia.

Physiologia Plantarum
|January 11, 2011
PubMed
Summary
This summary is machine-generated.

Plant hormone interactions, including auxin, gibberellins (GAs), and brassinosteroids (BRs), are often overstated. This study found some suggested interactions in pea internodes are weak or reversed, suggesting simpler models are needed.

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Area of Science:

  • Plant Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Plant hormone interactions are typically modeled as complex, web-like networks.
  • Understanding these interactions is crucial for plant growth and development.

Purpose of the Study:

  • To experimentally assess proposed interactions between key plant hormones in elongating pea internodes.
  • To determine the physiological relevance and directionality of these hormone interactions.

Main Methods:

  • Utilized an experimental system focusing on elongating pea internodes.
  • Analyzed interactions involving auxin, gibberellins (GAs), brassinosteroids (BRs), abscisic acid (ABA), and ethylene.

Main Results:

  • Several suggested hormone interactions were not observed or occurred in the reverse direction.
  • Some interactions were found to be weak, with limited physiological significance, especially under log-linear response assumptions.
  • Confirmed interactions include auxin stimulating ethylene and bioactive GA levels.

Conclusions:

  • The complexity of plant hormone interaction networks may be overstated.
  • Some proposed interactions lack sufficient evidence or physiological relevance in specific systems.
  • Development of simpler, more targeted models focusing on key interactions is recommended.