학술논문
메리골드 생육에 있어 지베렐린과 식물생장억제제의 상호관계 / The Interaction between Gibberellin and Plant Growth Retardant on the Growth of Marigold
Document Type
Dissertation/ Thesis
Author
Source
Subject
Language
Korean
Abstract
본 연구는 메리골드 'Durango Yellow'에 GA3와 생장억제제인 uniconazole과 paclobutrazol 처리 후 이들 사이에 길항작용의 시기와 농도를 구명하고, 비료 상쇄 효과를 조사하고자 수행하였다. GA3 전처리 후 uniconazole과 paclobutrazol을 종자 처리시 1.0 mg·L-1 GA3 처리구에서는 0.1 mg·L-1 uniconazole과 0.1, 1.0 mg·L-1 paclobutrazol에서 발아가 촉진되었다. GA3 전처리 후 uniconazole과 paclobutrazol을 토양 관주 처리한 결과 GA3 무처리구, 0.5, 100 mg·L-1 GA3에서는 uniconazole의 농도가 높을수록, paclobutrazol은 농도가 낮을수록 초장이 감소했다. GA3 무처리구에서는 1.0 mg·L-1 uniconazole에서, 1.0 mg·L-1 GA3 처리구에서는 1.0 mg·L-1 paclobutrazol에서, 100 mg·L-1 GA3 처리구에서는 0.1 mg·L-1 paclobutrazol에서 엽록소 함량이 가장 높았다. 0.5 mg·L-1 GA3 처리구에서는 0.1, 1.0 mg·L-1 pacloubutrazol에서 절간장이 감소했다. 10 mg·L-1 GA3 처리구에서는 10 mg·L-1 uniconazole과 1.0 mg·L-1 pacloubutrazol에서 경경이 작았다. 꽃목길이는 1.0 mg·L-1 GA3 처리구에서는 10 mg·L-1 uniconazole과 0.1 mg·L-1 paclobutrazol에서, 10 mg·L-1 GA3 처리구에서는 10 mg·L-1 uniconazole과 0.1, 1.0 mg·L-1 pacloubutrazol에서 효과적으로 감소하였다. 그러나 개화수는 처리 간 유의성 차이가 보이지 않았다. 식물생장조절제 처리 후 다양한 비료 농도로 처리 했을 때 초장은 생장억제제 무처리구에서 유의성 차가 나타났으며 농도가 높을수록 크기가 컸다. 개화소요일수를 제외하고 초장, 엽록소 함량, 꽃목길이, 경경, 개화수, 화경, 엽장, 엽폭, 근장, 지상부 생체중, 지하부 생체중, 지상부 건물중, 지하부 건물중은 유의적인 차이가 없었는데 이는 비료 농도와는 관계없이 처리에 의해 손상이 완화되었다. GA3 전처리 후 uniconazole과 paclobutrazol의 처리는 상쇄 효과가 없었으며, 다양한 농도의 비료 처리 시 상쇄 효과가 있는 것으로 보아 생장억제제로 인한 작물 손상시 비료 처리가 생장억제 완화에 도움을 줄 것으로 판단된다.
This study investigated the timing and level of antagonism between GA3, and uniconazole and paclobutrazol. The use of fertilizer to offset detrimental effects in marigold ‘Durango Yellow’ was also investigated. Germination rate was significantly promoted by the 0.1 mg·L-1 uniconazole, and the 0.1 and 1.0 mg·L-1 paclobutrazol treatments in the 1.0 mg·L-1 GA3 pretreatments. The control (non-treatment), 0.5 and 100 mg·L-1 GA3 pretreatments significantly decreased plant height at higher concentrations of uniconazole and at lower concentrations of paclobutrazol. The 1.0 mg·L-1 uniconazole treatment in the GA3 control, the 1.0 mg·L-1 paclobutrazol treatment in the 1.0 mg·L-1 GA3 pretreatment, and the 0.1 mg·L-1 paclobutrazol treatment in the 100 mg·L-1 GA3 pretreatment resulted in the highest chlorophyll value. The 0.1 and 1.0 mg·L-1 paclobutrazol treatments in the 0.5 mg·L-1 GA3 pretreatment significantly decreased internode length. The 10 mg·L-1 uniconazole and 1.0 mg·L-1 paclobutrazol treatments in the 10 mg·L-1 GA3 pretreatment resulted in the smallest stem diameter. The peduncle was inhibited by the 10 mg·L-1 uniconazole and 0.1 mg·L-1 paclobutrazol treatments in the 1.0 mg·L-1 GA3 pretreatments and by the 10 mg·L-1 uniconazole, and 0.1 and 1.0 mg·L-1 paclobutrazol treatments in the 10 mg·L-1 GA3 pretreatments. However, the number of flowers were not significantly different. The fertilizer treatments significantly affected plant height compared to the control and plant height increased with the increase in fertilizer concentration. Plant height, chlorophyll value, peduncle, stem diameter, numbers of flowers, flower diameter, leaf length, leaf width, root length, shoot fresh weight, root fresh weight, shoot dry weight, and root dry weight were not significantly affected by the treatments, but any deleterious effects on these characteristics were alleviated after all fertilizer treatments. There was no offset effect of uniconazole and paclobutrazol on the GA3 pretreatment, while the offset effect of fertilizer was observed on uniconazole and paclobutrazol in the GA3 pretreatment. Therefore, application of fertilizer can reduce growth inhibition caused by plant growth retardants.
This study investigated the timing and level of antagonism between GA3, and uniconazole and paclobutrazol. The use of fertilizer to offset detrimental effects in marigold ‘Durango Yellow’ was also investigated. Germination rate was significantly promoted by the 0.1 mg·L-1 uniconazole, and the 0.1 and 1.0 mg·L-1 paclobutrazol treatments in the 1.0 mg·L-1 GA3 pretreatments. The control (non-treatment), 0.5 and 100 mg·L-1 GA3 pretreatments significantly decreased plant height at higher concentrations of uniconazole and at lower concentrations of paclobutrazol. The 1.0 mg·L-1 uniconazole treatment in the GA3 control, the 1.0 mg·L-1 paclobutrazol treatment in the 1.0 mg·L-1 GA3 pretreatment, and the 0.1 mg·L-1 paclobutrazol treatment in the 100 mg·L-1 GA3 pretreatment resulted in the highest chlorophyll value. The 0.1 and 1.0 mg·L-1 paclobutrazol treatments in the 0.5 mg·L-1 GA3 pretreatment significantly decreased internode length. The 10 mg·L-1 uniconazole and 1.0 mg·L-1 paclobutrazol treatments in the 10 mg·L-1 GA3 pretreatment resulted in the smallest stem diameter. The peduncle was inhibited by the 10 mg·L-1 uniconazole and 0.1 mg·L-1 paclobutrazol treatments in the 1.0 mg·L-1 GA3 pretreatments and by the 10 mg·L-1 uniconazole, and 0.1 and 1.0 mg·L-1 paclobutrazol treatments in the 10 mg·L-1 GA3 pretreatments. However, the number of flowers were not significantly different. The fertilizer treatments significantly affected plant height compared to the control and plant height increased with the increase in fertilizer concentration. Plant height, chlorophyll value, peduncle, stem diameter, numbers of flowers, flower diameter, leaf length, leaf width, root length, shoot fresh weight, root fresh weight, shoot dry weight, and root dry weight were not significantly affected by the treatments, but any deleterious effects on these characteristics were alleviated after all fertilizer treatments. There was no offset effect of uniconazole and paclobutrazol on the GA3 pretreatment, while the offset effect of fertilizer was observed on uniconazole and paclobutrazol in the GA3 pretreatment. Therefore, application of fertilizer can reduce growth inhibition caused by plant growth retardants.