자생식물로부터 내건성 식물의 최적인자 선발과 생육특성
Selection Indices to Identify Drought-tolerance and Growth Characteristics of the Selected Korean Native Plants
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초록
본 연구에서는 내건성 식물 선발을 위한 최적 인자를 구명하고, 이들 내건성 식물들의 생장특성을 조사하였다. 건조저항인자에 대한 나머지 건조저항일(RD), 엽면적(LD), 단위증산량(UTR), 상대함수량(RWC), 상대수분손실량(RWL), 엽면적(LA), 기공수(SN) 및 기공면적(SA) 등 6개 인자들을 비교한 결과상대수분손실량과 단위증산량이 건조저항일에 많은 영향을 주는 것으로 나타났다. PCA분석 결과 SA,LA, RD는 한그룹으로 RWC와 SN은 다른 한 그룹으로 구분되었고, UTR은 SA, LA와, RWL은 RWC와SN과 음의 상관을 보였다. 상기 결과를 종합하여 느릅나무, 도깨비바늘, 뚝갈, 매듭풀, 새, 더위지기,맑은대쑥, 독말풀, 긴담배풀, 소리쟁이, 비수리, 장구채, 개기장, 도깨비가지를 내건성 식물 종으로 선발하였고, 이들에 대한 생장시험을 수행하였다. 절토사면지에서 내건성 식물의 줄기생장은 식물 종간에약간의 차이를 보였는데, 줄기생장과 잎의 수는 느릅나무를 제외하고 폿트에서는 차이를 보이지 않았다. 그러나 절토사면지에서 내건성 식물 뿌리 생장과 T/R율은 폿트생장과 큰 차이를 보였고, 특히 T/R율은 폿트묘보다 월등히 낮았다. 이 결과로 보아 선발된 내건성 식물은 절토사면지와 같이 척박한 토양에서도 잘 적응할 것으로 나타나 내건성 식물의 육종 등에 이용될 수 있을 것으로 판단된다.
Abstract
Best drought tolerance index was determined through statistics analysis and growth appearanceof drought tolerant plants was determined by cultivation in pot and sloping land. Fordetermination of best drought tolerant indicators, RD(Resistant dry days), LD(Leaf area),UTR(Unit transpiration), RWC(Relative water content), RWL(Relative water loss), LA(Leaf area),SN(Stoma unmber) and SA(Stoma area) were carried out by correlation and PCA analysis. RWLand UTR were affected on plant drought tolerance according to comparison among six indicesfor resistant dry days. The PCs axes separated SA, LA, RD and RWC and SN. UTR wasnegatively correlated with SA, RWL were also negatively correlated with RWC and SN. RWL and UTR were proved best selection indicator for the selection of drought tolerant species. Ulmus parvifolia, Bidens bipinnata, Patrinia villosa, Kummerowia striata, Arundinella hirta,Artemisia gmelini etc. were selected drought tolerant plants. Shoot growth appearance of droughtresistant plants was differed pot and sloping land. Shoot growth and leaf number was nosignificant differences between the pot and sloping land. However, root growth of droughttolerant plants was all the difference between two cultivation. T/R ratio of drought tolerantplants was also found a big difference. T/R ratio of drought tolerant plants in sloping land waslower than that of pot. These results will be served efficiently plant breeding.
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