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KMID : 0903620040450060365
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Journal of the Korean Society for Horticultural Science
2004 Volume.45 No. 6 p.365 ~ p.369
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Effects of Exogenous Sucrose Supply on Growth and Flowering of Chrysanthemum
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Lee Byung-Joo
Won Mi-Kyoung
Park Ha-Seong
Yang Euy-Seog
Lee Jong-Suk
Atherton Jeffrey Gordon
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Abstract
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An attempt to increase the level of sucrose available to the plants was made by supplying sucrose exogenously through cut stem xylem or via stem injection system in chrysanthemum (Dendranthema grandiflorum cv. Envy). Plants fed with sucrose solution developed flower-bud earlier and flower diameter was increased as compared to that of sucrose-free control. In plants supplied with distilled water, flower development and plant growth were slow but leaf area and chlorophyll content were highest as compared to the plants supplied with sucrose solution. These results clearly show that the plants subjected to sucrose-free distilled water maximize the source activity, i.e., the photosynthesis for the carbohydrate production. The stem injection system delivered sucrose to the plants over 35 days. The volume injected over that period decreased at all treatments and the solution uptake for plants injected with sucrose-free distilled water was greater than those injected with sucrose solutions. Sucrose solution supplied by the stem injection system also advanced floral development similar to that seen in the experiment of sucrose supply through xylem. However, there was no significant difference in the final leaf number, suggesting that flower initiation was not affected by sucrose supply under short day condition.
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KEYWORD
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chlorophyll, Dendranthema grandiflorum, floral stage, leaf number, stem injection
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