Effects of Foliar-sprayed Diniconazole on Contents of Endogenous Gibberellic Acids and Abscisic Acid in Lilium davuricum

Title
Effects of Foliar-sprayed Diniconazole on Contents of Endogenous Gibberellic Acids and Abscisic Acid in Lilium davuricum
Author(s)
오욱엄선정[엄선정]이인중[이인중]최영준[최영준]김규원박경일
Keywords
WATER-STRESS; BIOSYNTHESIS; IDENTIFICATION; PACLOBUTRAZOL; PLANTS
Issue Date
201106
Publisher
KOREAN SOC HORTICULTURAL SCIENCE
Citation
KOREAN JOURNAL OF HORTICULTURAL SCIENCE & TECHNOLOGY, v.29, no.3, pp.165 - 171
Abstract
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 mg.L(-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 (GA(19) -> GA(20) -> GA(1)) pathway resulting in GA(1) as the active form but also the non C-13 hydroxylation (NCH, GA(12) -> GA(24) -> GA(9) -> GA(4)) with GA(4) as the active form. However, the main pathway was NCH because GA(4) concentration of 55 ng.g(-1) dry wt was much higher than GA(1) content of 0.23 ng.g(-1) dry wt in control plant. Diniconazole inhibited GA biosynthesis through NCH pathway from its early stage. GA(12) content decreased by diniconazole up to 6% level of that of control and this effect continued to GA(4). Diniconazole reduced GA(12) content by 12.7 ng.g(-1) dry wt, whereas that of control plant was 213.8 ng.g(-1) dry wt. ABA content decreased up to one third of control by diniconazole application. From the contents of endogenous GA(4), GA(1), and ABA in this study, we could conclude that diniconazole reduces the plant height by inhibiting GA(4) biosynthesis in L. davuricum.
URI
http://hdl.handle.net/YU.REPOSITORY/25108
ISSN
1226-8763
Appears in Collections:
자연자원대학 > 원예생명과학과 > Articles
자연자원대학 > 원예학과 > Articles
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