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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국원예학회 HORTICULTURE ENVIRONMENT and BIOTECHNOLOGY HORTICULTURE ENVIRONMENT and BIOTECHNOLOGY Vol.50 No.5
- 발행연도
- 2009.10
- 수록면
- 384 - 391 (8page)
이용수
초록· 키워드
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Tomato is a typical ammonium-sensitive plant in solution culture, showing severe toxicity symptoms. In this study we hypothesized that by gradually adding 2 mM N-NH₄ (as final concentration) during the period of nutrient solution change (4 days), plants would have enough time to assimilate ammonium, and consequently result in less toxicity symptoms. To test this hypothesis different treatments were applied as follows: nitrate as Ca(NO₃)₂, ammonium as control (once application), three split applications and six split applications of ammonium as (NH₄)₂SO₄. When plants were treated with ammonium, including control and split applications, they had severe toxicity symptoms. No significant difference was found in growth parameters when plants received 3 or 6 split applications (660 and 330 μM, respectively) of a final volume of 2 mM N-NH₄ in a four days nutrient solution change compared to control plants. The lower micromolar ammonium concentrations resulted in shorter roots and shoots, less root and shoot dry weight, less chlorophyll in leaves as well as fewer lateral shoots and lower transpiration, compared to nitrate grown plants. Nitrate treated plants showed the best plant performance with regard to chlorophyll content, root and shoot dry weight, lateral shoots, and active leaves on plants at harvest. These results indicated that even a low daily μM (330 μM) concentration of ammonium in nutrient solution can result in severe toxicity on tomato plants, and despite the importance of other factors, this toxicity seems to be mainly due to low pH of root medium.
목차
Abstract
Introduction
Materials and Methods
Results
Discussion
Conclusion
Literature Cited
참고문헌 (27)
참고문헌 신청
1. [학술지(정기간행물)] - Abbasi, M.K / 2000 / Estimation of simultaneous nitrification and denitrification in grassland soil associated with urea-N using 15N and nitrification inhibitor / Biol. Fertil. Soils 31 : 38 ~ 44
2. [학술지(정기간행물)] - Babourina, O / 2007 / Nitrate supply affects ammonium transport in canola roots / J. of Exp. Botany 58 : 651 ~ 658
3. [학술지(정기간행물)] - Bligny, R / 1997 / PH regulation in acid-stressed leaves of pea plants grown in the presence of nitrate or ammonium salts: studies involving 31P-NMR spectroscopy and chlorophyll fluorescence / Acta Bioenergitics 1320 : 142 ~ 152
4. [학술지(정기간행물)] - Blom-Zandstra, M / 2007 / The role of nitrate in the osmoregulation of lettuce (Lactuca sativa L.) grown at different light intensities / J. of Exp. Bot 36 : 1043 ~ 1052
5. [학술지(정기간행물)] - Britto, D.T / 2002 / NH4+ toxicity in higher plants, a critical review / J. of Plant Physiol 159 : 567 ~ 584
2. [학술지(정기간행물)] - Babourina, O / 2007 / Nitrate supply affects ammonium transport in canola roots / J. of Exp. Botany 58 : 651 ~ 658
3. [학술지(정기간행물)] - Bligny, R / 1997 / PH regulation in acid-stressed leaves of pea plants grown in the presence of nitrate or ammonium salts: studies involving 31P-NMR spectroscopy and chlorophyll fluorescence / Acta Bioenergitics 1320 : 142 ~ 152
4. [학술지(정기간행물)] - Blom-Zandstra, M / 2007 / The role of nitrate in the osmoregulation of lettuce (Lactuca sativa L.) grown at different light intensities / J. of Exp. Bot 36 : 1043 ~ 1052
5. [학술지(정기간행물)] - Britto, D.T / 2002 / NH4+ toxicity in higher plants, a critical review / J. of Plant Physiol 159 : 567 ~ 584
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UCI(KEPA) : I410-ECN-0101-2009-525-018980086