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KMID : 1098420150230040311
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Korean Journal of Medicinal Crop Science
2015 Volume.23 No. 4 p.311 ~ p.318
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Effect of Plant Growth Regulators on Fruit Enlargement and Optimal Harvest Time in Sageretia thea (Osback) M. C. Johnst
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Song Sang-Churl
Song Chang-Khil
Kim Ju-Sung
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Abstract
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This study had been conducted to investigate the effect of some plant growth regulators inducing fruit enlargement and optimal harvest time in Sageretia thea. Two hundred fifty ㎎/ℓ mepiquat chloride treatment, 1 ㎎/ℓ thidiazuron treatment on full bloom, and 200 ㎎/ℓ gibberellic acid treatment on 7 days before full bloom resulted in the increase of 21.7% in weight, and 200 ㎎/ℓ gibberellic acid treatment 7 days before full bloom, 10 ㎎/ℓ forchlorfenuron treatment 14 days after full bloom, and 1 ㎎/ℓ thidiazuron treatment on full bloom also brought about positive effects on the enlargement of the fruit, increasing 6.3%, 6.3% and 8.1% in its transverse diameter, respectively. Furthermore, the effects of the plant growth regulator treatments on the harvest time of Sageretia thea were determined as follows: the increase in the optimal harvest time of 57.2 - 75.4%, shorter maturation period, by the treatments with 500 ㎎/ℓ mepiquat chloride 7 days after full bloom, 100 ㎎/ℓ gibberellic acid treatment on full bloom, 2.5 ㎎/ℓ forchlorofenuron 7 days after full bloom and 2 ㎎/ℓ thidiazuron treatment 7 days before full bloom; and the greater effects of plant growth regulator treatments on the fruit maturation in the following order, gibberellic acid > thidiazuron > forchlorofenuron > mepiquat chloride. The results of this study are expected to be used as a reference data to develop Sageretia thea as a new local specific crop for Jeju island.
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KEYWORD
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Sageretia thea, Fruit Enlargement, Gibberellic Acid, Mepiquat Chloride, Optimal Harvest Time, Plant Growth Regulator
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