Abstract
The study was intended to know any relations between the rice tolerance to oxyfluorfen and varietal speciation in seed protein composition or any enzymatical allelies with or without chemical treatment. Rice varieties used were Chokoto, Aichiasahi, Agabyeo, IR 3941 and Tablei as the tolerant group, and Mushakdanti, Weld Pally, HP 1033, HP 857, and HP 907 as the susceptible, respectively. Electrophoretic methods used were SDS-PAGE for seed protein, 7% PAGE for isozymes (acid phosphatase and peroxidase from rice seedling) and changes in isoenzyme activity (malate dehydrogenase, peroxidase and esterase) as affected by oxyfluorfen treatment ($10^{-4}M$) was also studied. The results are summarized as follows. -Among 19 bands separated in seed proteins, two different rice groups selected in terms of tolerance were clustered in dissimilarity. This was based on 2 facts in that G band was not present in susceptible varieties and that less activity of H, N, O, P, Q, Rand S band was shown. -Among 4 bands separated in acid phosphatase, the presence of (band and lower activity of B band was specific for tolerant varieties. For 4 minor bands separated in peroxidase, the tolerant varieties had no activity in B band and higher activity in A, C, D bands. -Time-course study of isozymes as affected by $10^{-4}M$ oxyfluorfen showed that Chokoto, the tolerant varieties, had little activity in A band and consistently higher activities in Band C bands for malate dehydrogenase. For 5 bands separated in peroxidase, B band was not found in Chokoto while A, C, D, and E bands were consistently present. Esterase was separated into about 4 bands in which Chokoto had maintained higher activities in A, C and D bands.
Oxyfluorfen에 대표적(代表的)인 내성군(耐性群)(Chokoto, Aichiasahi, Agabyeo, IR 3941, Tabali)과 감수성품종군(感受性品種群)(Mushakdanti, Weld pally, HP 1033, HP 857, HP 907)을 공시(供試)하여 종실단백질(種實蛋白質)(SDS-PAGE 법(法))과 동위효소(同位酵素)(acid phosphatase, peroxidase: 7% PAGE 법(法))의 전기영동(電氣泳動) pattern을 분석(分析)하고 oxyfluorfen $10^{-4}M$ 처리후(處理後)의 동위효소(同位酵素)(malate dehydrogenase, peroxidase, esterase) pattern의 특이성(特異性)을 확인(確認)하므로써 oxyfluorfen 내성차이(耐性差異)와 이들 전기영동(電氣泳動) pattern 차이(差異)가 갖는 연관성(聯關性)을 알고저 하였다. 결과(結果)를 요약(要約)하면 다음과 같다. l. 종실단백질(種實蛋白質)의 전기영동(電氣泳動)에서는 19종(種) band를 찾아볼 수 있었고, 두 품종군간(品種群間)에 비유사성(非類似性)이 있는 것으로 clustering 되었다. 이는 감수성군(感受性群)에서 G band가 없고, H, N, O, P, Q, R, S band에서 활성(活性)이 낮았던 데 기인한다. 2. 품종군간(品種群間)의 동위효소(同位酵素) 분석결과(分析結果), 4개(個)의 acid phosphatase band 가운데 내성군(耐性群)은 B band의 활성(活性)이 낮으나 특이적(特異的)으로 C band를 갖는 공통점(共通點)이 있었다. Peroxidase의 4개(個) minor band에 대하여는 내성군(耐性群)이 A, C, D band의 활성(活性)이 높고 B band의 활성(活性)은 거의 없었던 특이성(特異性)이 있었다. 3. Oxyfluorfen 처리(處理)에 기인한 동위효소(同位酵素)의 경시적(經時的) 변화(變化)로 보아, 내성(耐性)인 Chokoto에서는 malate dehydrogenase의 3개(個) band 가운데 A band의 활성(活性)은 거의 없었고 B 및 C band의 활성(活性)은 지속적(持續的)으로 높게 유지(維持)되는 특이성(特異性)이 있었다. Peroxidase의 5개(個) band 가운데 B band는 내성(耐性)인 Chokoto에서 발견되지 않았으나 A, C, D, E band는 경시적(輕視的)으로도 소실경향(消失傾向)이 크지 않았다. Esterase는 대략 4개(個)의 band로 분리(分離)되었는데 내성(耐性)인 Chokoto는 A, C, D band가 높은 활성(活性)을 갖고 지속적(持續的)으로 유지되는 특이성(特異性)을 나타내었다.
