Allelopathic Activity and Determination of Allelochemicals from Sunflower (Helianthus annuus L.) Root Exudates - 1. Allelopathic and Autotoxic Effects of Sunflower Root Exudates

해바라기(Helianthus annuus L.) 근분비물질(根分泌物質)의 타감작용(他感作用) 및 타감물질(他感物質)의 동정(同定) - 1. 해바라기 근분비물질(根分泌物質)의 타감작용(他感作用) 및 자가억제작용(自家抑制作用)

There was no significant difference in the final germination percentages(Experiment 1-3) as affected by sunflower root exudates between the control and the treated for the test species. In general(Experiment 1), however, germination onset was delayed the treated bottles. Germination rate was, also, reduced for both radish(Raphanus sativus L.) and rice(Oryza sativa L.). Therefore, the germination index was low in the treated bottles but germination gradually increased with time in the greated bottles in all test species so that the final germination percentages were similar between treatments. The root exudates of sunflower had significant inhibitory effects(Experiment 1-3) on the lengths of the shoots and roots of all the test species. Fresh weight was also significantly reduced in all test species. Sunflower seedlings(Experiment 3) in the treated(with the XAD-4 resin column) were larger and healthier than those in the control (without XAD-4 resin column) because of the removal of allelochemicals. The fresh weight of sunflower seedlings was markedly inhibited by sunflower root exudates. These mean that sunflower probably is an autotoxic crop.

해바라기의 타감작용(他感作用)(Allelopathy) 및 천연제초제(天然除草劑)로서의 개발가능성(開發可能性)에 관한 시험(試驗)을 1988-1991년(年)에 걸쳐 국제미작연구소(國際米作硏究所)(IRRI) : 농학(農學), 생화학부(生化學部) 및 국립(國立)필리핀 대학교(大學校) 화학과(化學科)(천연물(天然物) 연구실(硏究室))에서 수행(遂行)하여 얻은 결과중(結果中) 해바라기의 생육중(生育中) 뿌리에서 분비(分泌)되는 타감작용(他感作用) 및 자가억제작용(自家抑制作用)에 관(關)한 연구결과(硏究結果)는 다음과 같다. 1. 해바라기의 근분비물질(根分泌物質)은 대조구(對照區)에 비해 전체적인 발아율(發芽率)에는 유의적(有意的)인 차이(差異)가 인정되지 않았지만 발아시(發芽始)등에는 다소 큰 영향(影響)을 미쳤음. 2. 생물검정재료(生物檢定材料)의 지상부(地上部), 지하부(地下部) 생장(生長) 및 전체 생체중(生體重)에는 유의적인 감소(減少)가 있었음. 3. XAD-4 Resin올 부착한 시험(試驗) 3에서 해바라기는 대조구(對照區)에 비해 전반적인 생장량(生長量)이 많은 것으로 보아 자가억제작용(自家抑制作用)이 인정되었으며 이는 Resin에 의한 타감물질(他感物質)(Allelochemicals)의 판착효과(坂着效果)로 추정(推定)된다.