규소, 질소, 칼슘 단독 및 혼합처리가 벼 식물체 내 무기성분 흡수 및 식물호르몬 함량 변화에 미치는 영향 (Changes in Mineral Uptake and Hormone Concentrations in Rice Plants Treated with Silicon, Nitrogen and Calcium Independently or in Combination)

서지정보

· 발행기관 : 한국작물학회
· 수록지 정보 : 한국작물학회지 / 62권 / 4호 / 293 ~ 303페이지
· 저자명 : 장수원, 김윤하, 나채인, 이인중

초록

벼 식물체에 규소, 질소, 칼슘을 단독 및 혼합 처리할 경우 무기이온의 흡수와 식물호르몬 GA1과 JA 함량변화에미친 결과는 아래와 같다.
1. 질소와 칼슘이온은 규소처리에 의해 흡수가 억제된것으로 조사됐고, 마그네슘 함량은 규소, 질소, 칼슘단독 및 혼합처리에서 무처리보다 증가하였다.
2. 식물호르몬 ABA의 함량은 모든 처리에서 무처리와차이가 없었다.
3. 식물호르몬 GA1의 함량은 질소와 규소 혼합처리에서 가장 높았고, 다음으로 질소 단독처리 규소 단독처리순으로 높았다. 반면 칼슘 단독처리 및 칼슘과 규소혼합처리에서 GA1함량은 차이가 없었고, 이러한 결과는 규소, 질소 및 칼슘 처리 후 12시간 및 24시간에서도 동일한 양상을 보였다.
4. 규소, 질소, 칼슘 단독 및 혼합처리 후 6시간 뒤 식물호르몬 JA 함량은 모든 처리에서 무처리보다 증가하였고, 특히 규소와 질소 혼합처리에서 가장 높게 조사되었다. 그러나 처리 후 12시간과 24시간 후 조사에서는 칼슘 단독처리에서 JA 함량이 무처리와 차이가 없었고, 이외의 처리에서는 무처리보다 높았다.

영어초록

To elucidate the physiological responses of rice plants to the essential mineral silicon (Si), we assessed the effects of treatments with Si, nitrogen (NH4NO3; ammonium nitrate), and calcium (CaCl2; calcium chloride), independently or in combination on mineral uptake rates and levels of the hormones abscisic acid (ABA), gibberellin (GA1) and jasmonic acid (JA).
We found that nitrogen and calcium uptake was inhibited by Si application. However, solo application of nitrogen or calcium did not affect Si uptake. Compared to the untreated plants, the application of Si, NH4NO3 or CaCl2 increased the endogenous hormone levels in treated plants. In particular, the concentrations of GA1 and JA increased significantly after the application of Si or NH4NO3. The level of GA1 observed after a treatment (solo or combine) with Si, and NH4NO3 was higher than that of the control.
By contrast, independent application of CaCl2 or a combined treatment with Si and CaCl2 did not alter GA1 levels. The highest level of GA1 was present in plants given a combination treatment of Si and NH4NO3. This effect was observed at all time points (6 h, 12 h and 24 h). Endogenous JA contents were higher in all treatments than the control. In particular, a combination treatment with Si and NH4NO3 significantly increased the JA levels in plants compared to other treatments at all time points. A small increase in JA levels was observed after 6 h in plants given the CaCl2 treatment. However, JA levels did not differ between plants given a CaCl2 treatment and controls after 12 h or 24 h of exposure. We conclude that treatment with CaCl2 alone does not affect endogenous JA levels in the short term. Endogenous ABA contents did not show any differences among the various treatments.

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