채소종자 발아와 유묘생장에 미치는 유기 또는 무기게르마늄의 효과 및 흡수특성
Uptake Properties of Germanium to Vegetable Plants and Its Effect on Seed Germination and on Early Stage Growth
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식물의 종자발아와 유묘생장에 미치는 무기게르마늄과 유기게르마늄의 효과와 흡수특성을 조사하기 위하여, 대표적인 채소류인 갓, 배추 및 청경채를 이용하여 다양한 게르마늄농도(0, 10, 25, 50, 100 mg L-1)를 처리하였다. 채소 종자발아는 모든 식물에서 무기게르마늄을 100 mg L-1 처리한 경우에만 약간의 저해를 받았고 나머지 조건에서는 거의 영향을 받지 않았다. 식물의 유묘생장에 미치는 게르마늄의 효과는 갓과 배추의 경우에는 모든 농도의 무기게르마늄(10∼100 mg L-1)에서 뿌리의 생장에 심각한 저해를 보였고 지상부 생장은 높은 농도(50, 100 mg L-1)에서는 저해를 받지만 낮은 농도(10, 25 mg L-1)에서는 오히려 약간의 생장 촉진효과를 보이거나 거의 차이가 없는 것으로 보였다. 유기게르마늄의 처리시에는 뿌리와 지상부의 생육이 낮은 농도(10, 25, 50 mg L-1)의 대부분 조건에서 생장을 촉진하는 결과를 보였다. 식물체내의 게르마늄의 흡수 특성은 무기 및 유기게르마늄의 모든 조건에서 대조구에 비해 처리농도가 높아짐에 따라 점진적으로 뚜렷한 증가를 보였다. 특히 무기게르마늄을 처리한 경우보다 유기 게르마늄을 처리한 경우에 같은 농도에서 전반적으로 약 2～4.5배까지 많이 흡수되었다. 25 mg L-1 농도의 게르마늄을 처리한 경우를 보면, 유기게르마늄의 처리시 게르마늄의 흡수는 갓에서는 약 4배(무기게르마늄: 0.37 mg g-1 dw, 유기게르마늄: 1.47 mg g-1dw), 배추에서는 약 2.2배(무기게르마늄: 0.40 mg g-1dw, 유기게르마늄: 0.86 mg g-1dw) 그리고 청경채의 경우 약 2.1배(무기게르마늄: 0.33 mg g-1 dw, 유기게르마늄: 0.70 mg g-1dw) 정도로 무기게르마늄의 처리보다 높았다.
Abstract
To investigate effects of inorganic (GeO2) and organic (Ge-132) germanium (Ge) on seed germination and on early stage growth of plants and the uptake characteristics, various concentrations (0, 10, 25, 50, 100 mg L-1) of Ge to popular vegetables such as leaf mustard, chinese cabbage and pak-choi, respectively, were treated. On seed germination, no significant effect was observed in both inorganic and organic Ge treatments except 100 mg L-1 treatment of inorganic Ge. Exogenous inorganic Ge (10~100 mg L-1) treatments significantly inhibited the early root elongation growth of all plants. However, slight enhancement of early shoot elongation was detected in low concentrations (10 and 25 mg L-1) of Ge in the leaf mustard and chinese cabbage plants. Organic Ge treatments significantly stimulated the root and shoot growth at the 10, 25 and 50 mg L-1 treatments. Ge was accumulated linearly in the vegetables as both inorganic and organic Ge concentrations were increased. Interestingly, total contents of Ge in plants with Ge-132 treatments were 2~ 4.5 times more than those with inorganic Ge treatments in all concentrations. At 25 mg L-1 treatment of Ge, contents of Ge in vegetables are following: in leaf mustard, inorganic Ge: 0.37 mg g-1dw and organic Ge: 1.47 mg g-1dw; in the chinese cabbage, inorganic Ge: 0.4 mg g-1dw and organic Ge: 0.86 mg g-1dw; in the pak-choi, inorganic Ge: 0.33 mg g-1dw and organic Ge: 0.70 mg g-1dw, respectively. These results showed organic Ge is much better on early stage seedling growth and on germanium accumulation of vegetables than inorganic Ge.
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