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KMID : 0903619780190010089
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Journal of the Korean Society for Horticultural Science
1978 Volume.19 No. 1 p.89 ~ p.96
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Relationship between Growth Characteristics and Patterns of Flower Bud Initiation in Abeliophyllunm distichum NAK
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Yeam Do-Yi
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Abstract
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Abeliophyllum distichum plants were evaluated for the relationship between growth characteristics and patterns of flower bud initiation and growth. New shoots originating from overwintered branches were measured and the number of Sower buds were counted. Shoots from upper portion of branches showed poorer growth and had fewer flower buds than shoots originating from lower portion of the plant. Growth from upper, middle and lower portion was plotted. Growth from upper branches. started early and resulted in short branches and a single sigmoid growth curve. Shoot growth from middle branches started later but showed two flushes of growth or a double sigmoid curve. Shoots from the lower portion showed three flushes of exponential growth, resulting in longer branches. and a growth rhythm of a triple sigmoid curve, and produced more Sower buds than those of the middle or upper branches. The terminals from both the main shoots and axillary branches grew indeterminately, producing flower bud branches at an axillary position, but the terminals of flower bud branches grew out determinately, resulting in a cymose inflorescence. Thus the whole shoot withaxillary branch and flower bud branch looked like a large inflorescence cluster. There was a close relationship between the growth rhythm and the axillary branch growth, and flower bud formation.
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