지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2012.12
- 수록면
- 910 - 919 (10page)
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초록· 키워드
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The role of inorganic nitrogen assimilation in the production of amino acids, organic acids and soluble sugars is one of the most important biochemical processes in plants, and, in order to achieve normally, nitrate uptake and assimilation is essential. For this reason, the characterization of nitrate assimilation and metabolite composition from leaves, roots and xylem sap of tomato (Solanum lycopersicum) was investigated under different nitrate levels in media. Tomato plants were grown hydroponically in liquid culture under five different nitrate regimes: deficient (0.25 and 0.75 mM NO<sub>3</sub> -), normal (2.5 mM NO<sub>3</sub> -) and excessive (5.0 and 10.0 mM NO<sub>3</sub> -). All samples, leaves, roots and xylem sap, were collected after 7 and 14 days after treatment. The levels of amino acids, soluble sugars and organic acids were significantly decreased by N-deficiency whereas, interestingly, they remained higher in xylem sap as compared with N-normal and -surplus. The N-excessive condition did not exert any significant changes in metabolites composition, and thus their levels were similar with N-normal. The gene expression and enzyme activity of nitrate reductase (NR), nitrite reductase (NIR) and glutamine synthetase (GS) were greatly influenced by nitrate. The data presented here suggest that metabolites, as a signal messenger, existed in xylem sap seem to play a crucial role to acquire nitrate, and, in addition, an increase in α-ketoglutarate pathway-derived amino acids under N-deficiency may help to better understand plant C/N metabolism.
목차
Introduction
Materials and Method
Results
Discussion
References
참고문헌 (35)
참고문헌 신청
1. [학술지(정기간행물)] - Amtmann, A. / 2009 / Effects of N, P, K and S on metabolism:new knowledge gained from multi-level analysis / Cuur. Opi. Plant Biol 12 : 275 ~ 283
2. [학술지(정기간행물)] - Barneix, A.J. / 1984 / Some effects of nitrate abundance and starvation on metabolism and accumulation of nitrogen in barley (Hordeum vulgare L.) cv. Sonja / Planta 162 : 465 ~ 476
3. [학술지(정기간행물)] - Barneix, A.J. / 1996 / The central role of amino acids on nitrogen utilization and plant growth / J. Plant Physiol 149 : 358 ~ 362
4. [학술지(정기간행물)] - Causin, N.F. / 1993 / Regulation of NH4 + uptake in young wheat plants: Effect of root ammonium concentration and amino acids / Plant and Soil 151 : 211 ~ 218
5. [학술지(정기간행물)] - Crawford, N.M. / 1995 / Nitrate: nutrient and signal for plant growth / Plant Cell 7 : 859 ~ 868
2. [학술지(정기간행물)] - Barneix, A.J. / 1984 / Some effects of nitrate abundance and starvation on metabolism and accumulation of nitrogen in barley (Hordeum vulgare L.) cv. Sonja / Planta 162 : 465 ~ 476
3. [학술지(정기간행물)] - Barneix, A.J. / 1996 / The central role of amino acids on nitrogen utilization and plant growth / J. Plant Physiol 149 : 358 ~ 362
4. [학술지(정기간행물)] - Causin, N.F. / 1993 / Regulation of NH4 + uptake in young wheat plants: Effect of root ammonium concentration and amino acids / Plant and Soil 151 : 211 ~ 218
5. [학술지(정기간행물)] - Crawford, N.M. / 1995 / Nitrate: nutrient and signal for plant growth / Plant Cell 7 : 859 ~ 868
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UCI(KEPA) : I410-ECN-0101-2014-520-003118949