강원도 영월 산에서 발견된 거대 백수오 추정 식물자원의 형태 및 유전적 특성
Morphological and Genetic Characteristics of a Giant Cynanchum Plant Discovered at the Wild Mountain in Yeongwol-gun, Gangwon-do, Korea
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Background: A giant root that resembled the root of Cynanchum species (Giant Cynanchum) was found on a mountain in Gangwon Province, Korea, in March 2021. The root was 10 m long and weighted 20 ㎏. Its morphological characteristics highly resembled those of Cynanchum wilfordii (Cw) and Cynanchum auriculatum (Ca). Methods and Results: The giant root collected in Gangwon Province has been permanently exhibited at the National Institute of Horticultural and Herbal Science, Rural Development Administration, Eumsung, Korea. The plants were clonally propagated for further research at the Seoul National University farm. Seven molecular markers were applied to the root for accurate species authentication. However, the species could not be clearly identified because the results of seven markers yielded contradicting results : one Cw-type, two Ca-types, and four unidentified types. The internal transcribed spacer 2 (ITS2) of the nuclear ribosomal RNA coding gene and four plastid DNA barcoding regions (matK, rbcL, trnL-trnF, and psbA-psbH) were analyzed for sequence comparison and phylogenetic tree construction. The results showed that the species was close to Ca. However, the results obtained form the phylogenetic tree are not definite because Cynanchum species were not monophyletic Conclusions: The species of the giant root is assumed to be close to Ca, but additional research is necessary to clarify the exact species and its origin. Moreover, this root might be a valuable plant resource for the bio-industry.
Abstract
Background: A giant root that resembled the root of Cynanchum species (Giant Cynanchum) was found on a mountain in Gangwon Province, Korea, in March 2021. The root was 10 m long and weighted 20 ㎏. Its morphological characteristics highly resembled those of Cynanchum wilfordii (Cw) and Cynanchum auriculatum (Ca). Methods and Results: The giant root collected in Gangwon Province has been permanently exhibited at the National Institute of Horticultural and Herbal Science, Rural Development Administration, Eumsung, Korea. The plants were clonally propagated for further research at the Seoul National University farm. Seven molecular markers were applied to the root for accurate species authentication. However, the species could not be clearly identified because the results of seven markers yielded contradicting results : one Cw-type, two Ca-types, and four unidentified types. The internal transcribed spacer 2 (ITS2) of the nuclear ribosomal RNA coding gene and four plastid DNA barcoding regions (matK, rbcL, trnL-trnF, and psbA-psbH) were analyzed for sequence comparison and phylogenetic tree construction. The results showed that the species was close to Ca. However, the results obtained form the phylogenetic tree are not definite because Cynanchum species were not monophyletic Conclusions: The species of the giant root is assumed to be close to Ca, but additional research is necessary to clarify the exact species and its origin. Moreover, this root might be a valuable plant resource for the bio-industry.
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