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Surk-Sik Moon(문석식),Eul-Jae Myung(명을재),Soon-Chang Cho(조순장),Jae-Bum Park(박재범),Bong-Jin Chung(정봉진) 한국농약과학회 2002 농약과학회지 Vol.6 No.2
Plant growth promoting activity of quinolinone metabolites, 2-(2-hepteny)-3-methyl-4quinolinone (1), 2-heptyl-3-methyl-4-quinolinone, and 2-nonyl-3-methyl-4-quinolinone, produced by Pseudomonas cepacia and ethyl 2-methyl-3-alkyl-4-quinolinone carboxylates chemically synthesized were tested by using seed-germination assay, growth increments in plant height after foliar applications. Plant height increment, fresh weight, and the number of fruits were measured after seed-soaking and drench treatment. Compound 1 among the natural products showed a consistent growth promoting effect in seed-germination and plant height after a foliar application. After a seed-soaking and drench treatment, compound 1 and synthetic ethyl 2-methyl-4-quinolinone-3-carboxylate (5) showed a significant enhancement in fresh weight and the number of fruits after harvest. Compound 1 and 5 increased the number of fruits per plant by 44% and 84% over the control, respectively.
정봉진(Bong-Jin Chung),이성달(Seong-Dal Lee),명을재(Eul-Jae Myung),김용태(Yong-Tae Kim),김승호(Seung-Ho Kim) 한국농약과학회 2002 농약과학회지 Vol.6 No.3
This experiment was conducted to investigate the effects of acid rain in spraying copper hydroxide 77% wettable power(WP) on leaf surface morphology and crop injury of the garlic(Allium sativum L.). Leaf chlorosis, hooked leaves, wrinkled epidermal cells and increased stomata open of garlic were induced by foliar application of simulated acid rain(SAR). It was become to be severe in application of copper hydroxide solution after application of SAR, but those yield of garlic was not significantly different from the untreated control. Leaf chlorosis was sharply increased above 100 ppm of copper ions. Amount of solved copper ions in copper hydroxide solution was remarkably increased below pH 5.5 and the residue in garlic leaves was significantly increased by application of copper hydroxide solution after spraying SAR compared with application of copper hydroxide solution only. When calcium carbonate was applied together with copper hydroxide leaf chlorosis was less than copper hydroxide only.