Effect of hypoxia on the antioxidative enzymes in aerobically grown rice (Oryza sativa) seedlings

Takashi Ushimaru, Sumio Kanematsu, Mineo Shibasaka, Hideo Tsuji

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

The development of the antioxidative system is repressed in rice (Oryza sativa L. cv. Yamabiko) seedlings germinated under water, but the system is synthesized within 24 h after exposure of the seedlings to air. In order to see whether this regulation of the antioxidative system is reversible, the changes were investigated after submergence of aerobically grown seedlings under water. Low survivability, no morphological change and a slight increase in activity of alcohol dehydrogenase (ADH; EC 1.1.1.1) were observed 24 h after the submergence. Activities of some antioxidative enzymes were decreased, but they were still higher than those in seedlings germinated under water. Superoxide dismutase (SOD; EC 1.15.1.1) in mitochondria, in addition to cytosolic forms of SOD, showed no significant changes, whereas plastidic SOD decreased drastically, which reflected the changes in the development of the corresponding organelles. Thus, the regulation of the antioxidative system was, in part, reversible. In contrast, catalase (EC 1.11.1.6) activity alone was increased by the shift from air to submergence.

Original languageEnglish
Pages (from-to)181-187
Number of pages7
JournalPhysiologia Plantarum
Volume107
Issue number2
DOIs
Publication statusPublished - Oct 1999

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Seedlings
hypoxia
Oryza sativa
superoxide dismutase
submergence
rice
seedlings
Enzymes
enzymes
alcohol dehydrogenase
Water
Air
catalase
Alcohol Dehydrogenase
air
Organelles
Catalase
water
Superoxide Dismutase
Mitochondria

ASJC Scopus subject areas

  • Plant Science

Cite this

Effect of hypoxia on the antioxidative enzymes in aerobically grown rice (Oryza sativa) seedlings. / Ushimaru, Takashi; Kanematsu, Sumio; Shibasaka, Mineo; Tsuji, Hideo.

In: Physiologia Plantarum, Vol. 107, No. 2, 10.1999, p. 181-187.

Research output: Contribution to journalArticle

Ushimaru, Takashi ; Kanematsu, Sumio ; Shibasaka, Mineo ; Tsuji, Hideo. / Effect of hypoxia on the antioxidative enzymes in aerobically grown rice (Oryza sativa) seedlings. In: Physiologia Plantarum. 1999 ; Vol. 107, No. 2. pp. 181-187.
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