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Publication Date
1981
Description
Seombadi (Dystaenia takesimana [Nakai} Kitagawa) is a member of the Apiaceae (Umbelliferae) family and is ecologically adapted to the island of Ulneung, situated 160 km off the east coast of the Korean peninsula. The plant is an important forage for livestock on the island; but because of lack of knowledge about its germination, and its slow establishment characteristics, its use on mainland Korea has been limited. Objectives of our study were to examine the seed characteristics and factors affecting germination of seombadi and to evaluate depletion of seed food reserves and elongation of organs of seedlings during germination and initial seedling growth. Lipids made up 28.7% of the total dry material in seombadi seeds. The imbibition rate of the seeds with wings intact, wings removed, and potassium hydroxide (KOH) applied for 5 hours were 29%, 40%, and 65%, respectively. Removal of wings significantly improved germination. Seed sections showed waxy layers between the wings and the seedcoat. Germination percentage improved with increasing seed weight. Seeds rapidly lost their viability 45 days after harvest, and after one year germination was 0%, Light neither inhibited nor improved germination. High temperature pretreatment increased percentage of germination from 44.3 % to 91 . .'3 % . Soaking seeds with the wings removed in water for 6 days increased germination. The higher imbihition and germination of seombadi seeds after wing removal, and with the seedcoat weakened by mechanical and chemical seed treatments, indicated that the high percentage of wax in the wings and seedcoat may inhibit seed germination. Seedling growth of seombadi was slower than that of alfalfa (Medicago sativa L.) or orchardgrass (Dactylis glomerata L.). Seombadi seeds lost less weight during germination than did orchardgrass seeds. These studies indicate that establishment of seombadi under Korean mainland environments could be improved by hastening germination with mechanical and chemical seed treatments.
Citation
Kim, D A.; Hur, S H.; Kim, Y J.; and Park, C M., "Seombadi (Dystaenia takesimana [Nakai] Kitagawa), a New Forage Plant: Its Germination and Early Growth Characteristics" (1981). IGC Proceedings (1981-2023). 4.
(URL: https://uknowledge.uky.edu/igc/1981/section6/4)
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Seombadi (Dystaenia takesimana [Nakai] Kitagawa), a New Forage Plant: Its Germination and Early Growth Characteristics
Seombadi (Dystaenia takesimana [Nakai} Kitagawa) is a member of the Apiaceae (Umbelliferae) family and is ecologically adapted to the island of Ulneung, situated 160 km off the east coast of the Korean peninsula. The plant is an important forage for livestock on the island; but because of lack of knowledge about its germination, and its slow establishment characteristics, its use on mainland Korea has been limited. Objectives of our study were to examine the seed characteristics and factors affecting germination of seombadi and to evaluate depletion of seed food reserves and elongation of organs of seedlings during germination and initial seedling growth. Lipids made up 28.7% of the total dry material in seombadi seeds. The imbibition rate of the seeds with wings intact, wings removed, and potassium hydroxide (KOH) applied for 5 hours were 29%, 40%, and 65%, respectively. Removal of wings significantly improved germination. Seed sections showed waxy layers between the wings and the seedcoat. Germination percentage improved with increasing seed weight. Seeds rapidly lost their viability 45 days after harvest, and after one year germination was 0%, Light neither inhibited nor improved germination. High temperature pretreatment increased percentage of germination from 44.3 % to 91 . .'3 % . Soaking seeds with the wings removed in water for 6 days increased germination. The higher imbihition and germination of seombadi seeds after wing removal, and with the seedcoat weakened by mechanical and chemical seed treatments, indicated that the high percentage of wax in the wings and seedcoat may inhibit seed germination. Seedling growth of seombadi was slower than that of alfalfa (Medicago sativa L.) or orchardgrass (Dactylis glomerata L.). Seombadi seeds lost less weight during germination than did orchardgrass seeds. These studies indicate that establishment of seombadi under Korean mainland environments could be improved by hastening germination with mechanical and chemical seed treatments.
