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 language | English |
|---|---|
| Pages (from-to) | 181-187 |
| Number of pages | 7 |
| Journal | Physiologia Plantarum |
| Volume | 107 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Oct 1999 |
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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 journal › Article
}
TY - JOUR
T1 - Effect of hypoxia on the antioxidative enzymes in aerobically grown rice (Oryza sativa) seedlings
AU - Ushimaru, Takashi
AU - Kanematsu, Sumio
AU - Shibasaka, Mineo
AU - Tsuji, Hideo
PY - 1999/10
Y1 - 1999/10
N2 - 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.
AB - 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.
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UR - http://www.scopus.com/inward/citedby.url?scp=0033459571&partnerID=8YFLogxK
U2 - 10.1034/j.1399-3054.1999.100205.x
DO - 10.1034/j.1399-3054.1999.100205.x
M3 - Article
VL - 107
SP - 181
EP - 187
JO - Physiologia Plantarum
JF - Physiologia Plantarum
SN - 0031-9317
IS - 2
ER -