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자료유형
학술저널
저자정보
저널정보
한국원예학회 HORTICULTURE ENVIRONMENT and BIOTECHNOLOGY HORTICULTURE ENVIRONMENT and BIOTECHNOLOGY Vol.47 No.6
발행연도
2006.12
수록면
366 - 370 (5page)

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Chrysanthemum (Dendranthema × grandiflorum cv, Seifu) infected with chrysanthemum stunt viroid (CSVd) exhibited a stunted phenotype of reduced internode length without change in node number. Flowering response to CSVd infection was variable with mother plant growth conditions. CSVd-infected plants from mother plants maintained in long day condition for 4 months flowered earlier than non-infected plants. On the contrary, those from over-wintered vigorous mother stock flowered 8 days later than non-infected plants. Stunting in chrysanthemum induced by CSVd infection was associated with gibberellic acid (GA) metabolism. GA₁ was the major bioactive GA in chrysanthemum and GA₁ level decreased by half with CSVd infection. Among three late GA biosynthesis pathways, only the third oxidation step (GA₁? to GA₂? and GA₂₄ to GA?) meditated by GA 20-oxidase was disturbed. This result suggests that GA 20-oxidase especially occupying the third oxidation step seems to be the one of the feasible limiting factors associated with decreasing GA₁ levels and stunting symptom in chrysanthemum.

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Abstract
Introduction
Materials and Methods
Results and Discussion
Literature Cited

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