Update info.Tools - Reference - Detail
Reference Detail
| Reference | ||
|---|---|---|
| Author | Yi J., Gao J., Zhang W., Zhao C., Wang Y., Zhen X. | |
| Title | Differential Uptake and Utilization of Two Forms of Nitrogen in <i>Japonica</i> Rice Cultivars From North-Eastern China. | |
|
Abstract: <i>Japonica</i> rice is widely planted in north-eastern China because of its superior food quality and stable grain yields. Nitrogen (N) is an essential element for rice growth, and development and its availability directly impacts on rice yields. The knowledge of N uptake and its utilization characteristics in <i>japonica</i> are thus important areas of research. Three <i>japonica</i> rice cultivars, SN265, SN1401, and SN9816, which are planted across large areas of north-eastern China, were used here to evaluate the uptake and utilization along the life cycle of both ammonium <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mrow> <mml:mo>(</mml:mo> <mml:mrow> <mml:mi>N</mml:mi> <mml:msubsup> <mml:mi>H</mml:mi> <mml:mn>4</mml:mn> <mml:mo>+</mml:mo> </mml:msubsup> </mml:mrow> <mml:mo>)</mml:mo> </mml:mrow> </mml:mrow> </mml:math> and nitrate <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mrow> <mml:mo>(</mml:mo> <mml:mrow> <mml:mi>N</mml:mi> <mml:msubsup> <mml:mi>O</mml:mi> <mml:mn>3</mml:mn> <mml:mo>-</mml:mo> </mml:msubsup> </mml:mrow> <mml:mo>)</mml:mo> </mml:mrow> </mml:mrow> </mml:math> in hydroponically grown plants. The plants were grown in one of three different solutions with varying <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>N</mml:mi> <mml:msubsup> <mml:mi>H</mml:mi> <mml:mn>4</mml:mn> <mml:mo>+</mml:mo> </mml:msubsup> </mml:mrow> </mml:math> : <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>N</mml:mi> <mml:msubsup> <mml:mi>O</mml:mi> <mml:mn>3</mml:mn> <mml:mo>-</mml:mo> </mml:msubsup> </mml:mrow> </mml:math> ratios: 1:0, 0:1, and 1:1 (The total N content was 40 mg L-1 for each treatment). At the tillering stage, when only <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>N</mml:mi> <mml:msubsup> <mml:mi>O</mml:mi> <mml:mn>3</mml:mn> <mml:mo>-</mml:mo> </mml:msubsup> </mml:mrow> </mml:math> was provided, lower rates of N uptake and enzyme activities of three rice plants resulted in reduced tiller numbers. During the reproductive stage, the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>N</mml:mi> <mml:msubsup> <mml:mi>H</mml:mi> <mml:mn>4</mml:mn> <mml:mo>+</mml:mo> </mml:msubsup> </mml:mrow> </mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mrow> <mml:mo>(</mml:mo> <mml:mrow> <mml:mi>N</mml:mi> <mml:msubsup> <mml:mi>H</mml:mi> <mml:mn>4</mml:mn> <mml:mo>+</mml:mo> </mml:msubsup> </mml:mrow> <mml:mo>)</mml:mo> </mml:mrow> </mml:mrow> </mml:math> uptake rates in SN1401 were consistently maintained at high levels, whereas the rates in SN265 and SN9816 were significantly lower, across all three treatments. At the booting stage, when only <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>N</mml:mi> <mml:msubsup> <mml:mi>O</mml:mi> <mml:mn>3</mml:mn> <mml:mo>-</mml:mo> </mml:msubsup> </mml:mrow> </mml:math> was provided, SN1401 plants had significantly higher expression levels of <i>OsNRT2.1</i> and <i>OsNRT2.2</i>, higher activity of nitrate reductase in the roots, and higher activity levels of glutamine synthetase and glutamate synthase in the leaves, compared with the SN265 and SN9816 plants. The higher enzyme activity was beneficial to the secondary assimilation of N, which ultimately promoted panicle development in SN1401. Consequently, the grain yield per plant of SN1401 was the highest with solutions of both <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>N</mml:mi> <mml:msubsup> <mml:mi>H</mml:mi> <mml:mn>4</mml:mn> <mml:mo>+</mml:mo> </mml:msubsup> </mml:mrow> </mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>N</mml:mi> <mml:msubsup> <mml:mi>O</mml:mi> <mml:mn>3</mml:mn> <mml:mo>-</mml:mo> </mml:msubsup> </mml:mrow> </mml:math> . These results indicate that selecting a rice cultivar with higher utilization of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>N</mml:mi> <mml:msubsup> <mml:mi>O</mml:mi> <mml:mn>3</mml:mn> <mml:mo>-</mml:mo> </mml:msubsup> </mml:mrow> </mml:math> is beneficial for increasing the number of grains per panicle, grain yield, and N use efficiency. |
||
| Journal | Front Plant Sci | |
| Country | China | |
| Volume | 10 | |
| Pages | 1061 | |
| Year | 2019 | |
| PubMed ID | 31552066 | |
| PubMed Central ID | 6738331 | |
| DOI | 10.3389/fpls.2019.01061 | |
| URL | - | |
| Relation | ||
| Gene | ABC1 AMT1;1 AMT1;3 GDH1 GLN1;1 GLN1;2 GLT1 GLT2 NRT2.1 NRT2.2 _ | |
| INSD | - | |
| Strain | Wild Core Collection | - |
| Induced Mutation Lines(NIG Collection) | - | |
| Sterile Seed Strain | - | |
|
Lethal Embryo Mutantion Strain |
- | |
|
Stages in Each Organ - Muant Lines (Gene) |
- | |
| Cultivated Varieties(NIG Collection) | - | |
| Stages in Each Organ | - | |
