• Korean Journal of Plant Resources
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• v.35 no.6
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• pp.805-819
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• 2022

The taxonomic status and phylogenetic relationship of Opuntia monacantha Haw. f. jejuensis J. K. Kim ex Y. S. Yang (Jejubaiknyuncho), which is native to southern coast of Jeju Island, Korea was analyzed using DNA markers obtained from Korean Opuntia. Opuntia stricta Haw., O. humifusa Raf., and O. humifusa Raf. f. jeollaensis E. J. Kim and S. S. Whang, native or cultivated in Korea, have no stripes on the back of tepals and have a purple pulp, whereas O. monacantha f. jejuensis has purple stripes on the back of tepals and a greenish-yellow pulp color. Opuntia monacantha has purple stripes on both the front and back of its tepals, whereas stripes appear only on the back of tepals of O. monacantha f. jejuensis. Opuntia monacantha f. jejuensis was assigned to Elatae series in phylogenetic analysis and was found to be more closely related to O. monacantha subsp. arechavaletae (Speg.) Guiggi, compared with O. monacantha at a molecular level. Based on its phylogenetic and morphological differences from O. monacantha and O. monacantha subsp. arechavaletae, which are native or have been cultivated in Jeju areas, O. monacantha f. jejuensis was named as a new forma in this study.

• Korean Journal of Plant Resources
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• v.31 no.1
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• pp.32-36
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• 2018

An unrecorded cactus species, Opuntia monacantha Haw. (Cactaceae), is newly reported in Korea. It was found growing on the coast of Jeju Island. It is distinguished from other Opuntia species by the following morphological characteristics. It is an erect succulent tree, commonly 2~3 m, but can reach 4 m. It is highly branched at the top and has drooping upper branches. The cladodes are oval to obovate, narrowing basally, and glossy green. It has yellow outer tepals with a reddish median stripe on the back. It produces purple fruit with yellowish green juicy pulp, which contains several rudimentary seeds and very few mature seeds (<2). The Korean name "Wang-seon-in-jang" is given to the species, based on the height of the plants and the large cladodes.

• Korean Journal of Plant Resources
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• v.34 no.5
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• pp.451-461
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• 2021

In Jeju Island, there are two different types of Opuntia cactus in cladodae, fruit, flower, flowering period and spine. There is no comparative study of these two taxa yet, so it is often seen as the same species. The purpose of this study was to investigate the phylogenetic relationship between the Taxa of the Opuntia monacantha Haw. and Opuntia stricta Haw. in Jeju Island. The results indicate that the two taxa were completely different from each other on the analysis of nrITS, matK and atpB-rbcL gene as well as the morphological comparison. Also, O. monacantha among the two taxa is included in the Elatae series, so South America is the origin, and O. stricta is included in the Scheerianae series, which confirms that North America is the origin. The name of the O. monacantha in Jeju Island was named 'Jeju-Baick-nyun-cho' considering geographical location conditions and symbolic characteristics.

• Applied Chemistry for Engineering
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• v.28 no.2
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• pp.252-256
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• 2017

Opuntia cactus grows in the southern part of Korea, Geoje Island, Jeju Island, and South Coast. The flowers bloom around April to May of each year, and purple berries ripen around November to December. It has been widely used in home medicine since ancient times and it has great effects on blood circulation, detoxification, analgesia and antioxidant activity. In this study, we tried to demonstrate antioxidant, antidiabetic and antimicrobial activities of Opuntia monacantha Haw., and also grasp the value as a functional raw material. As a result, a strong antioxidative effect was confirmed by extracting taxifolin which is an antioxidative substance in Opuntia monacantha Haw. In the antidiabetic function test, a high level of antidiabetic function was confirmed when compared to that of using a commercially available diabetic drug. In addition, as a result of the antimicrobial effect measurement, it showed a strong antimicrobial activity on E.coli and Salmonella, and proved the excellent value of Opuntia manacantha Haw. as a functional ingredient.