Physiological roles of betacyanin in a halophyte, Suaeda japonica Makino

Keisuke Hayakawa, Sakae Agarie

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Halophytes can be used as a crop on salinized agricultural land. Suaeda japonica Makino is an annual highly salt-tolerant plant, that inhabits salt marshes in the Ariake Sea, Japan. Accompanying growth, leaves of S. japonica change from green to red with accumulation of a red pigment, betacyanin. To elucidate the physiological roles of betacyanin in S. japonica, we tested the antioxidant capacity of purified betacyanin and leaf extracts containing different levels of betacyanin under oxidative-stress conditions. The assay with 1,1-diphenyl-2-picrylhydrazyl (DPPH) showed that the purifi ed betacyanin had antioxidant activity. H2O2-induced protein oxidation of the leaf extracts was prevented by the addition of betacyanin. The antioxidant enzyme activity decreased in the red leaves, but the content of malondialdehyde (MDA), an oxidative stress marker in the red leaves was nearly the same as that in the green leaves. Betacyanin synthesis was induced under photoinhibition-inducible conditions of low temperature and high-intensity light. These results indicate that betacyanin serves as an antioxidant in S. japonica and that the leaf reddening of this species is a key adaptive strategy for coping with the harsh environmental conditions in salt marshes of the Ariake Sea.

Original languageEnglish
Pages (from-to)351-359
Number of pages9
JournalPlant Production Science
Volume13
Issue number4
DOIs
Publication statusPublished - Nov 30 2010

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Suaeda
leaves
antioxidants
leaf extracts
oxidative stress
salt marsh plants
coping strategies
halophytes
photoinhibition
salt marshes
malondialdehyde
light intensity
agricultural land
antioxidant activity
pigments
enzyme activity
oxidation
Japan
salts
environmental factors

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science

Cite this

Physiological roles of betacyanin in a halophyte, Suaeda japonica Makino. / Hayakawa, Keisuke; Agarie, Sakae.

In: Plant Production Science, Vol. 13, No. 4, 30.11.2010, p. 351-359.

Research output: Contribution to journalArticle

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