scholarly journals The relationship between rhizosphere nitrification and nitrogen-use efficiency in rice plants

2007 ◽  
Vol 0 (0) ◽  
pp. 071018035446001-??? ◽  
Author(s):  
YI LIN LI ◽  
XIAO RONG FAN ◽  
QI RONG SHEN
Keyword(s):  
Nitrogen Use Efficiency ◽  
Nitrogen Use ◽  
Rice Plants ◽  
Use Efficiency ◽  
The Relationship

Identification of regulatory genes to improve nitrogen use efficiency

2014 ◽  
Vol 94 (6) ◽  
pp. 1009-1012 ◽  
Author(s):  
David R. Guevara ◽  
Yong-Mei Bi ◽  
Steven J. Rothstein
Keyword(s):  
Amino Acids ◽  
Transgenic Plants ◽  
Nitrogen Use Efficiency ◽  
Complex Traits ◽  
Regulatory Genes ◽  
Yield Potential ◽  
Environmental Damage ◽  
Nitrogen Use ◽  
Rice Plants ◽  
Use Efficiency

Guevara, D. R., Bi, Y.-M. and Rothstein, S. J. 2014. Identification of regulatory genes to improve nitrogen use efficiency. Can. J. Plant Sci. 94: 1009–1012. Crop production on soils containing sub-optimal levels of nitrogen (N) severely compromises yield potential. The development of crop varieties displaying high N use efficiency (NUE) is necessary in order to optimize N fertilizer use, and reduce the environmental damage caused by the current excessive application of N in agricultural areas. Genome-wide microarray analysis of rice plants grown under N-limiting environments was performed to identify NUE candidate genes. An early nodulin gene, OsENOD93-1, was strongly up-regulated during plant growth under low N. A constitutive Ubiquitin promoter was used to drive the expression of the OsENOD93-1 gene in transgenic plants to determine the importance of OsENOD93-1 for rice NUE. Transgenic rice plants over-expressing the OsENOD93-1 gene achieved ∼23% and 16% more yield and biomass, respectively, compared with wild-type plants when grown under N-limitation conditions. OsENOD93-1-OX transgenic plants accumulated a higher amount of total amino acids in the roots and xylem sap under N stress, suggesting that OsENOD93-1 plays a role in the transportation of amino acids. Taken together, we demonstrate that an effective way to identify NUE gene candidates involves both transcriptional profiling coupled with a transgenic validation approach to improve complex traits such as NUE in important crops.

scholarly journals Co-Overexpression of OsNAR2.1 and OsNRT2.3a Increased Agronomic Nitrogen Use Efficiency in Transgenic Rice Plants

2020 ◽  
Vol 11 ◽  
Author(s):  
Jingguang Chen ◽  
Xiaoqin Liu ◽  
Shuhua Liu ◽  
Xiaoru Fan ◽  
Limei Zhao ◽  
...  
Keyword(s):  
Transgenic Rice ◽  
Nitrogen Use Efficiency ◽  
Nitrogen Use ◽  
Rice Plants ◽  
Transgenic Rice Plants ◽  
Use Efficiency

scholarly journals 50 year trends in nitrogen use efficiency of world cropping systems: the relationship between yield and nitrogen input to cropland

2014 ◽  
Vol 9 (10) ◽  
pp. 105011 ◽  
Author(s):  
Luis Lassaletta ◽  
Gilles Billen ◽  
Bruna Grizzetti ◽  
Juliette Anglade ◽  
Josette Garnier
Keyword(s):  
Nitrogen Use Efficiency ◽  
Cropping Systems ◽  
Nitrogen Use ◽  
Nitrogen Input ◽  
Use Efficiency ◽  
The Relationship

ROLE OF CONSERVATION AGRICULTURE IN IMPROVING PRODUCTION WATER AND NITROGEN EFFICIENCY OF WHEAT UNDER RAINFED CONDITIONS

2020 ◽  
Vol 51 (4) ◽  
pp. 1139-1148
Author(s):  
Othman & et al.
Keyword(s):  
Crop Rotation ◽  
Nitrogen Use Efficiency ◽  
Agricultural Research ◽  
Research Work ◽  
Conservation Agriculture ◽  
Nitrogen Efficiency ◽  
Research Station ◽  
Wheat Varieties ◽  
Nitrogen Use ◽  
Use Efficiency

The research work was conducted in Izra’a Research station, which affiliated to the General Commission for Scientific Agricultural Research (GCSAR), during the growing seasons (2016 – 2017; 2017 – 2018), in order to evaluate the response of two durum wheat verities (Douma3 and Cham5) and two bread wheat varieties (Douma4 and Cham6) to Conservation Agriculture (CA) as a full package compared with Conventional Tillage system (CT) under rainfed condition using lentils (Variety Edleb3) in the applied crop rotation. The experiment was laid according to split-split RCBD with three replications. The average of biological yield, grain yield,  rainwater use efficiency and nitrogen use efficiency was significantly higher during the first growing season, under conservation agriculture in the presence of crop rotation, in the variety Douma3 (7466 kg. ha-1, and 4162kg. ha-1, 19.006 kg ha-1 mm-1,  39.62 kg N m-2respectively). The two varieties Douma3 and Cham6 are considered more responsive to conservation agriculture system in the southern region of Syria, because they recorded the highest grain yields (2561, 2385 kg ha-1 respectively) compared with the other studied varieties (Cham5 and Douma4) (1951 and 1724 kg ha-1 respectively). They also exhibited the highest values of both rainwater and nitrogen use efficiency.

Grain Yield and Nitrogen Use Efficiency of Mid-seasonIndicaRice Cultivars Applied at Different Decades

2015 ◽  
Vol 41 (3) ◽  
pp. 422 ◽  
Author(s):  
Cheng-Xin JU ◽  
Jin TAO ◽  
Xi-Yang QIAN ◽  
Jun-Fei GU ◽  
Bu-Hong ZHAO ◽  
...  
Keyword(s):  
Grain Yield ◽  
Nitrogen Use Efficiency ◽  
Nitrogen Use ◽  
Use Efficiency
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