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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.
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Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability. Root-colonizing fungi (e.g., mycorrhizae) increase a plant’s root surface area, which promotes nutrient absorption. While root-colonizing, nitrogen-fixing bacteria (e.g., rhizobia) convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants for various biological functions. For example, nitrogen is essential for the biosynthesis of the...
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Monitoring Plant Hormones During Stress Responses
11:01

Monitoring Plant Hormones During Stress Responses

Published on: June 15, 2009

Plant adaptogens.

H Wagner1, H Nörr, H Winterhoff

  • 1Institute of Pharmaceutical Biology, University of Munich, D-80333 Munich, Karlstr. 29.

Phytomedicine : International Journal of Phytotherapy and Phytopharmacology
|December 1, 2012
PubMed
Summary
This summary is machine-generated.

Adaptogens are plant drugs that help the body resist stress by modulating adaptation syndrome phases. Key adaptogens like Ginseng show significant antistress effects in studies.

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Area of Science:

  • Pharmacology
  • Natural Products Chemistry
  • Stress Physiology

Background:

  • The term 'adaptogen' lacks formal medical acceptance due to challenges in differentiating them from other drug classes.
  • Plant-derived substances have demonstrated the ability to modulate the body's response to stress, aligning with Selye's adaptation syndrome.
  • Several plant drugs, including Ginseng, Eleutherococcus, and Rhodiola, are recognized for their potential adaptogenic properties.

Purpose of the Study:

  • To review pharmacological and human study findings on plant drugs with antistress activity.
  • To summarize current assay systems for detecting antistress activities.
  • To identify potential active compounds responsible for adaptogenic effects.

Main Methods:

  • Review of existing pharmacological tests and human studies on selected plant drugs.
  • Analysis of assay systems used for evaluating antistress properties.
  • Identification of chemical compounds associated with adaptogenic activity.

Main Results:

  • Plant drugs like Ginseng, Eleutherococcus, Withania, Ocimum, Rhodiola, and Codonopsis show antistress activity in animal models.
  • These adaptogens can reduce stress reactions during the alarm phase or prevent exhaustion.
  • Potential active compounds include steroids, phenylpropane derivatives, and lignans, which influence the pituitary-adrenal axis and possess immunomodulatory/anabolic effects.

Conclusions:

  • Plant-derived adaptogens offer a degree of protection against long-term stress by modulating the adaptation syndrome.
  • Further research supports the role of specific compounds in mediating adaptogenic, immunomodulatory, and anabolic effects.
  • Established assay systems aid in the detection and validation of antistress activities in medicinal plants.