오옥신 처리가 댕댕이나무 삽목 발근에 미치는 영향

Abstract

본 연구는 한라산의 고산식물인 댕댕이나무의 현지내 보존을 위한 기초 연구로서 증식체계를 마련하고자 삽목 조건에 따른 발근율과 초기생육 특성 등을 알아보았다. 월별 댕댕이나무 녹지삽의 지하부 생장 특성은 NAA와 IBA처리시 IBA처리구에서 전반적으로 발근율이 높고 6월에 실시한 삽목이 상대적으로 26.7～35.6%가 발근율이 높은 것으로 나타났고 지상부의 생장특성은 5월과 6월 신초 수 평균 0.7～1.3개, 신초길이 평균 0.3～1.0㎝로 생장하여 큰 차이가 없는 것으로 나타났다. 관수체계에 대한 지하부의 발달은 두상관수인 경우 발근율은 31.1%, 뿌리수 3.6개, 뿌리길이 9.9㎝로 조사되었고 심지법인 경우 발근율 90.0%, 뿌리수 8.4개, 뿌리길이 9.9㎝로 심지법 삽목이 두상관수 삽목에 비해 발근율과 뿌리수가 각각 3배, 2.3배가 증가하였고 NAA, IBA 생장조절제 처리 시에도 대조구에 비하여 발근율과 뿌리수가 약 2～5배 정도의 생장이 증가하였다. 심지관수 시 녹지삽과 숙지삽의 발근율은 녹지삽이 90.0%, 숙지삽 47.8%로 녹지삽이 42.2%가 높았으며, 오옥신 처리시에서도 녹지삽의 발근율이 높았다. 또한 오옥신 농도, 종류, 침지시간 등을 고려하여 댕댕이나무의 발근율은 IBA가 안정적으로 댕댕이나무의 발근에 많은 영향을 주는 것으로 나타났다. 이상의 결과를 종합하여 보면 댕댕이나무의 삽목증식은 6월에 실시하여야 하고 지속적인 수분공급 위해 심지관수체계 구성과 IBA 100 ㎎·L^(-1)에서 10분 침지일때 효과적이라고 판단된다.

This study investigates uprooting rate and early raising characteristics according to cuttage conditions in order to prepare proliferation system as basic research for local preservation of Caerulea, which is Halla Mountain's alpine plant. For growth characteristics of underground parts of Caerulea by month, when treated by NAA and IBA, it was shown that IBA treatment had generally high uprooting rate, and cuttage done in June had relatively high uprooting rate (for 26.7-35.6%), and as for growth characteristics of aboveground parts in May and June, it was average 0.7-1.3 shoots and average 0.3-1.0 cm shoot length, showing no big differences. As for growth of underground parts by sprinkle water system, for sprinkle of upper parts, it was shown that uprooting rate was 31.1%, number of roots 3.6, root length 9.9cm, and for wick-using cutting it was shown that uprooting rate was 90.0%, number of roots 8.4, root length 9.9cm, showing that uprooting rate and number of roots were increased by factors of 3 and 2.3 respectively compared to upper-part-sprinkle cuttage wick-using cutting. For NAA, IBA plant growth regulator treatment as well uprooting rate and number of roots showed increased growth by factor of 2-5 compared to the control. For wick irrigation, uprooting rate of software cutting and hardwood cutting were 90.0% and 48.8% respectively, with the former greater by 42.2%, and for auxin treatment as well the uprooting rate was higher. In addition, considering auxin density, type, soak time, for uprooting rate of Caerulea it was shown that IBA has a lot of impact on growth of Caerulea in a stable way. Summarizing the findings, it is deemed that cutting proliferation of Caerulea should be done in June and when there is wick irrigation system for continuous supplying of water and when IBA 100 ㎎·L^(-1) and 10 minute soaking, for it to be effective.