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The protection of

Katherine Jensen1, Roger T Koide1

  • 1Department of Biology Brigham Young University Provo Utah USA.

Plant-Environment Interactions (Hoboken, N.J.)
|June 7, 2023
PubMed
Summary
This summary is machine-generated.

Salicornia rubra plants vary in color due to betacyanin concentration. Ultraviolet radiation absorption is mainly due to phenolic compounds, not betacyanins, regardless of plant color or sun exposure.

Keywords:
AmaranthaceaeCaryophyllalesbetacyaninsecophysiologyphenolicssalt playaultraviolet radiation

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Area of Science:

  • Plant physiology
  • Desert ecology
  • Biochemistry

Background:

  • Salicornia rubra, a Great Basin Desert plant, faces high UV radiation.
  • Betacyanins in S. rubra shoots absorb UV, but green plants exist in full sun.
  • Variation in betacyanin concentration and UV absorption needs explanation.

Purpose of the Study:

  • Investigate causes of betacyanin variation in S. rubra.
  • Determine the role of betacyanins in UV absorption.
  • Assess UV damage risk to green vs. red S. rubra plants.

Main Methods:

  • Measured UV absorption of cell sap from red and green S. rubra.
  • Quantified betacyanin and phenolic compound concentrations.
  • Compared plants grown in full sun versus shade.

Main Results:

  • Betacyanin concentration correlated with plant color (red > green).
  • UV absorption was primarily determined by phenolic compounds.
  • Phenolic compound concentration varied with sun exposure levels.

Conclusions:

  • Betacyanins do not solely determine UV absorption in S. rubra.
  • Phenolic compounds, influenced by sun exposure, are key UV absorbers.
  • Green S. rubra in full sun show no increased DNA risk compared to red plants.