Propagation by Cutting Method of Korea Rare Endemic Thuja Koraiensis Nak.

Propagation by Cutting Method of Korea Rare Endemic Thuja Koraiensis Nak.

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Abstract

눈측백나무(Thuja koraiensis Nak.)는 중국 동북부와 한반도의 고산지대에서만 자라는 상록성 소관목으로서 희귀 및 멸종위기 식물로 지정 보호되고 있으며, 세계자연보존연맹(IUCN) 적색목 록에 DD(data deficient)로 등재되어 있다. 세계적 희귀수종인 눈측백나무의 유전자원보존을 위한 삽목증식법을 개발하기 위하여 삽목시기, 상토 및 생장조절제의 종류별 농도에 따른 발근특성을 조사하였다. 삽목 발근율은 삽목시기, 식물생장조절물질의 종류 및 농도에서 각각 고도의 유의성 이 인정되었다. 삽목증식은 4~5월 숙지삽목이 적정시기로 판단되었으며, 발근율과 발근특성을 고 려한 식물생장조절물질의 종류 및 농도는 IAA 1000㎎/ℓ와 NAA 500㎎/ℓ로 처리하는 것이 캘 러스 형성율이 높고 발근이 촉진(발근율: 100%)되는 것으로 나타났다. 특히, 눈측백나무는 5월 삽목의 경우 무처리에서도 93% 이상의 높은 삽목 발근율을 보여 본 연구 결과는 눈측백나무의 유전자원 보존 및 증식에 기여할 것으로 판단된다.

English Abstract

Thuja koraiensis Nak. is a short and creeping evergreen shrub which reaches about 3 m in height andonly occurs in the northeast China and in high mountains over the Korea. It’s designated as a rare andendangered tree species in Korea and DD (data deficient) in Red List Category & Criteria of IUCN. This studywas carried out to develop the propagation technique by cutting for conservation of genetic resources of T.koraiensis. The rooting responses of branch cuttings, obtained from hard (May) and semi-hard wood shots(August) to three plant growth regulators (PGRs), namely, IAA, IBA, and NAA applied at various concentrations (0,10, 500, 10, 20, and 3000 mg/l) were examined in sand and mixed soil media. Percentage of rootingshowed significant diference betwen cutting time, among kinds and among concentration of PGRs. Theoptimum cutting time was April to May in hardwood cutting. The application of IAA 10 mg/l and NA 500mg/l were effective in calus formation and rooting of cutting. Relatively, rooting of cutting of the control takenin May was above 93%.

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Article Information

Title (non-english): 희귀식물 눈측백나무(Thuja koraiensis Nak.)의 삽목증식
Country: Republic of Korea
Language: Korean
Year: 2006
Study Design: After
Authors: Jeong Ho Song//Jung Joo Lee//Yeong Bon Koo//Kab Yeon Lee//Sang Don Han//Byeung Hoon Yang
Journal: Journal of Korean Society of Forest Science
Volume: 95
Issue: 4
Pages: 393-397
City/state or province/country: Republic of Korea