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New record and prediction of the potential distribution of the invasive alien species Brassica tournefortii (Brassicaceae) in Korea

국내 침입외래식물 사막갓(Brassica tournefortii; Brassicaceae)의 보고 및 잠재 분포 예측

  • KANG, Eun Su (Division of Forest Biodiversity, Korea National Arboretum) ;
  • KIM, Han Gyeol (Conservation Center for Gwangneung Forest, Korea National Arboretum) ;
  • NAM, Myoung Ja (The Society for Korean Peninsula Plants) ;
  • CHOI, Mi Jung (Division of Variety Examination, National Forest Seed & Variety Center) ;
  • SON, Dong Chan (Division of Forest Biodiversity, Korea National Arboretum)
  • 강은수 (국립수목원산림생물다양성연구과) ;
  • 김한결 (국립수목원광릉숲보전센터) ;
  • 남명자 (한반도식물연구회) ;
  • 최미정 (국립산림품종관리센터품종심사과) ;
  • 손동찬 (국립수목원산림생물다양성연구과)
  • Received : 2022.03.25
  • Accepted : 2022.09.20
  • Published : 2022.09.30

Abstract

The invasive alien species Brassica tournefortii Gouan (Brassicaceae) is herein reported for the first time in Korea, from Gunsan-si, Gochang-gun, and Jeju-si. Brassica tournefortii can easily be distinguished from B. juncea and B. napus by its dense stiff hairs at the base of the stem and leaves, basally and distally branched stems, partially dehiscent fruits, and seeds that become mucilaginous in the presence of moisture. Although some taxonomists have classified this species as belonging to Coincya Rouy based on its fruit and seed characteristics, the existence of one vein on the fruit valves and our maximum likelihood analysis using internal transcribed spacer sequences placed it in Brassica. Distribution data, photographs, and a description of B. tournefortii are presented herein. Moreover, potential changes in the distribution of B. tournefortii were predicted under different climate scenarios, but our analysis showed that the probability of the spreading of this species is low. Nevertheless, continuous monitoring is necessary for an accurate assessment. The results of the present study can be used to conduct an invasion risk assessment and can assist with the effective management of this invasive alien species.

침입외래식물인 Brassica tournefortii Gouan이 전북 군산시, 고창군, 제주도 제주시에서 발견되었다. 본 종은 식물체 기부에 강모가 밀생하고, 줄기가 기부와 말단에서 분지하며, 열매는 성숙시 일부분만 열개되고, 종자는 수분이 있을 때 점성이 띠는 특징으로 배추속의 갓, 유채와 쉽게 구분된다. 일부 학자들은 B. tournefortii의 열매와 종자의 특징으로 Coincya Rouy 속에 속하는 분류군으로 취급하기도 하나, 열매의 과피편 표면에 한개의 맥이 있는 특징과, ITS 구간 염기서열의 maximum-likelihood 분석 결과에 따라 배추속 식물로 분류하였다. 본 연구에서 B. tournefortii의 분포지, 화상자료 및 기재문을 제시하였으며, 또한 본 종의 잠재분포변화가 기후 시나리오에 의해 예측되었다. 예측 결과, B. tournefortii의 국내 확산 가능성은 낮은 것으로 나타났지만, 정확한 판단을 하기 위해서는 지속적인 모니터링이 필요할 것으로 판단된다. 본 연구의 결과들은 B. tournefortii의 위험성 평가 및 효과적인 관리방안을 제시하기 위한 자료로 활용될 수 있을 것이다.

Keywords

Acknowledgement

This study was supported by the project "Research on landscape genetics and distribution of invasive alien plants in Korea according to climate change (KNA1-2-39, 21-2)" funded by the Korea National Arboretum. We sincerely thank Dr. Yong-Chan Cho and Dr. Yoon-Young Kim for their constructive criticism and valuable comments, which were of great help in revising the manuscript.

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