담수조건하 벼 발아 및 입모단계시 항산화효소 및 Alcohol dehyrogenase활성 변화 (Changes of Antioxidative Enzymes and Alcohol Dehydrogenase in Young Rice Seedlings Submerged in Water)

서지정보

· 발행기관 : 한국작물학회
· 수록지 정보 : 한국작물학회지 / 53권 / 4호 / 440 ~ 446페이지
· 저자명 : 손지영, 고종철, 김우재, 김보경, 김정곤, 정남진

초록

Successful germination and establishment of
seedlings in flooded paddy are critical in direct seeding
cultivation of rice. In this study, we examined the relationship
between antioxidant enzymes and alcohol dehydrogenase
(ADH) activities and coleoptile elongation under submergence
of deep water with two rice cultivars, Iksan429 and Woodrose,
which show characteristic coleoptile elongation under
hypoxic condition. The growth of shoot under submerged
in water was faster than the root. The survival duration was
longer in Iksan429 than in Woodrose under submerged in
water. The alcohol dehydrogenase (ADH) activities were
significantly increased under hypoxia compared to in aerated
condition. The ADH activity was increased in Iksan429
more than in Woodrose under hypoxia. The superoxide dismutase
(SOD) activity in Iksan429 was gradually increased
up to 5 days after treatment (DAT) then decreased slowly
till 14 DAT under water, whereas in Woodrose it was
dramatically decreased after 5 DAT. The peroxidase (POX)
activity in Iksan429 was significantly increased until 7 DAT
under hypoxia, whereas it was not significantly different in
Woodrose during hypoxic treatment. However, in non-treated
condition, POX activity in Woodrose was increased more
than Iksan429. The changes of catalase (CAT) activities
showed no differences in both cultivars. We suggest that
the overexpression of ADH, SOD and POX activities is
responsible for the hypoxic tolerance and plays an important
role in the surviving of rice seedling.

영어초록

Successful germination and establishment of
seedlings in flooded paddy are critical in direct seeding
cultivation of rice. In this study, we examined the relationship
between antioxidant enzymes and alcohol dehydrogenase
(ADH) activities and coleoptile elongation under submergence
of deep water with two rice cultivars, Iksan429 and Woodrose,
which show characteristic coleoptile elongation under
hypoxic condition. The growth of shoot under submerged
in water was faster than the root. The survival duration was
longer in Iksan429 than in Woodrose under submerged in
water. The alcohol dehydrogenase (ADH) activities were
significantly increased under hypoxia compared to in aerated
condition. The ADH activity was increased in Iksan429
more than in Woodrose under hypoxia. The superoxide dismutase
(SOD) activity in Iksan429 was gradually increased
up to 5 days after treatment (DAT) then decreased slowly
till 14 DAT under water, whereas in Woodrose it was
dramatically decreased after 5 DAT. The peroxidase (POX)
activity in Iksan429 was significantly increased until 7 DAT
under hypoxia, whereas it was not significantly different in
Woodrose during hypoxic treatment. However, in non-treated
condition, POX activity in Woodrose was increased more
than Iksan429. The changes of catalase (CAT) activities
showed no differences in both cultivars. We suggest that
the overexpression of ADH, SOD and POX activities is
responsible for the hypoxic tolerance and plays an important
role in the surviving of rice seedling.

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