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Related Concept Videos

Photoreceptors and Plant Responses to Light02:00

Photoreceptors and Plant Responses to Light

Light plays a significant role in regulating the growth and development of plants. In addition to providing energy for photosynthesis, light provides other important cues to regulate a range of developmental and physiological responses in plants.
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...
Biological Clocks and Seasonal Responses02:45

Biological Clocks and Seasonal Responses

The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.
The Antenna Complex01:15

The Antenna Complex

Plants and other photosynthetic organisms comprise pigments capable of absorption of direct sunlight. These pigments are present in the reaction center - the main site of photochemical reactions as well as in the antenna complex. Under average light conditions, the rate at which reaction center pigments absorb light is far below the electron transport chain's capacity. As a result, the reaction center alone cannot provide enough energy to drive photosynthesis. The photosynthetic efficiency can...

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Related Experiment Video

Updated: Jun 13, 2026

Catalytic Scavenging of Plant Reactive Oxygen Species In Vivo by Anionic Cerium Oxide Nanoparticles
09:46

Catalytic Scavenging of Plant Reactive Oxygen Species In Vivo by Anionic Cerium Oxide Nanoparticles

Published on: August 26, 2018

Tocochromanol functions in plants: antioxidation and beyond.

Jon Falk1, Sergi Munné-Bosch

  • 1Carlsberg Research Center, 10 Gamle Carlsberg Vej, DK-2500 Valby, Denmark.

Journal of Experimental Botany
|April 14, 2010
PubMed
Summary

Tocochromanols (vitamin E) are vital plant compounds. Beyond antioxidant roles, they influence germination, growth, and stress responses, revealing new physiological functions in plants.

Area of Science:

  • Plant biochemistry and physiology
  • Vitamin E metabolism in plants

Background:

  • Tocochromanols, including tocopherols and tocotrienols, are essential vitamin E compounds synthesized by plants.
  • While known for antioxidant functions in mammals, their roles in plants are increasingly recognized.

Purpose of the Study:

  • To review the established antioxidant functions of tocochromanols in plants.
  • To explore emerging roles of tocopherols beyond membrane protection.
  • To discuss specific functions of different tocopherol homologues and tocotrienols.

Main Methods:

  • Analysis of mutant and transgenic plants (Arabidopsis, maize, potato, tobacco) with altered tocochromanol biosynthesis.
  • Characterization of physiological processes in plants with tocopherol deficiency.
  • Review of existing literature on tocochromanol functions.

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Real-Time Detection of Reactive Oxygen Species Production in Immune Response in Rice with a Chemiluminescence Assay
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Last Updated: Jun 13, 2026

Catalytic Scavenging of Plant Reactive Oxygen Species In Vivo by Anionic Cerium Oxide Nanoparticles
09:46

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Published on: August 26, 2018

A New Approach for the Comparative Analysis of Multiprotein Complexes Based on 15N Metabolic Labeling and Quantitative Mass Spectrometry
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Main Results:

  • Tocochromanols are crucial for plant physiology, not just as antioxidants.
  • Tocopherol-deficient plants exhibit impaired germination, photoassimilate export, growth, and stress tolerance.
  • Specific tocopherol forms (alpha- and gamma-tocopherol) and tocotrienols have distinct roles.

Conclusions:

  • Tocochromanols play multifaceted roles in plant development and stress adaptation.
  • Further research into tocotrienols and specific tocopherol functions is warranted.
  • Understanding tocochromanol functions is key to plant health and productivity.