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Diniconazole 엽면살포가 날개하늘나리의 내생 GA 및 ABA 함량에 미치는 영향
엄선정(Sun Jung Eum),박경일(Kyeung Il Park),이인중(In Jung Lee),최영준(Young Jun Choi),오욱(Wook Oh),김규원(Kiu Weon Kim) 한국원예학회 2011 원예과학기술지 Vol.29 No.3
Plant growth retardants reduce the plant height by inhibiting stem elongation in Lilium davuricum. To investigate the plant hormones related to stem elongation, we sprayed 50 ㎎ㆍℓ?¹ diniconazole to young plants of L. davuricum and quantified the contents of endogenous gibberellic acids (GA) and abscisic acid (ABA). In GA biosynthesis, L. davuricum had not only the early C-13 hydroxylation (GA₁? → GA₂? → GA₁) pathway resulting in GA₁ as the active form but also the non C-13 hydroxylation (NCH, GA₁₂ → GA₂₄ → GA? → GA₄) with GA₄ as the active form. However, the main pathway was NCH because GA₄ concentration of 55 ngㆍg?¹ dry wt was much higher than GA₁ content of 0.23 ngㆍg?¹ dry wt in control plant. Diniconazole inhibited GA biosynthesis through NCH pathway from its early stage. GA₁₂ content decreased by diniconazole up to 6% level of that of control and this effect continued to GA₄. Diniconazole reduced GA₁₂ content by 12.7 ngㆍg?¹ dry wt, whereas that of control plant was 213.8 ngㆍg?¹ dry wt. ABA content decreased up to one third of control by diniconazole application. From the contents of endogenous GA₄, GA₁, and ABA in this study, we could conclude that diniconazole reduces the plant height by inhibiting GA₄ biosynthesis in L. davuricum.
날개하늘나리에 있어서 디니코나졸 처리가 스트레스 내성과 관련된 해부학적 및 생화학적 특성에 미치는 영향
엄선정(Sun Jung Eum),박경일(Kyeung Il Park),최영준(Young June Choi),오욱(Wook Oh),김규원(Kiu Weon Kim) 한국원예학회 2012 원예과학기술지 Vol.30 No.3
This study was carried out to examine the effects of foliar-sprayed diniconazole on the morphological characteristics and the contents of polyamines (PA) and proline, and to investigate their relationship with stress tolerance in Lilium davuricum native to Korea. Plants with 5 cm mean height were sprayed with 50 ㎎ㆍℓ?¹ diniconazole or distilled water (control) and grown in a greenhouse maintained at 23/18℃ (day/night) for 30 days. Diniconazole decreased plant height, leaf length, diameter and length of the pith and cortical cell of the stem, while it increased the thickness and epicuticular wax of leaves measured at 30 days after treatment. In polyamines contents, diniconazole increased spermidine content at 5-10 days after treatment and spermine content after the 10th day of treatment as compared with the control. Diniconazole decreased proline content after the 10th day of treatment as compared with the control. From these results, it was concluded that foliar-sprayed diniconazole might morphologically and biochemically improve the stress tolerance of this plant species.