scholarly journals Molecular Regulatory Networks for Improving Nitrogen Use Efficiency in Rice

2021 ◽  
Vol 22 (16) ◽  
pp. 9040
Author(s):  
Mengmeng Hou ◽  
Ming Yu ◽  
Zhiqiang Li ◽  
Zhiyuan Ai ◽  
Jingguang Chen
Keyword(s):  
Nitrogen Use Efficiency ◽  
Regulatory Networks ◽  
Growth And Yield ◽  
Rice Varieties ◽  
Nitrogen Use ◽  
Arduous Task ◽  
Nitrogen Redistribution ◽  
Use Efficiency ◽  
Water Eutrophication

Nitrogen is an important factor limiting the growth and yield of rice. However, the excessive application of nitrogen will lead to water eutrophication and economic costs. To create rice varieties with high nitrogen use efficiency (NUE) has always been an arduous task in rice breeding. The processes for improving NUE include nitrogen uptake, nitrogen transport from root to shoot, nitrogen assimilation, and nitrogen redistribution, with each step being indispensable to the improvement of NUE. Here, we summarize the effects of absorption, transport, and metabolism of nitrate, ammonium, and amino acids on NUE, as well as the role of hormones in improving rice NUE. Our discussion provide insight for further research in the future.

scholarly journals Effects of Nitrogen Levels on Growth, Yield And Nitrogen use Efficiency Of Some Newly Released Egyptian Rice Genotypes

2018 ◽  
Vol 3 (1) ◽  
pp. 310-318 ◽  
Author(s):  
Adel M. Ghoneim ◽  
Gewaily E.E. ◽  
Marvet M.A. Osman
Keyword(s):  
Grain Yield ◽  
Nitrogen Use Efficiency ◽  
Nitrogen Fertilizer ◽  
Growth And Yield ◽  
Rice Varieties ◽  
Nitrogen Use ◽  
Nitrogen Levels ◽  
Growing Seasons ◽  
Use Efficiency ◽  
Rice Genotypes

Abstract Application of appropriate level of nitrogen fertilization is a major objective to increase nitrogen use efficiency by rice varieties. Field experiments were conducted during 2016 and 2017 growing seasons to evaluate the efficiency of varying nitrogen fertilizer rates on growth and yield parameters, along with nitrogen use efficiency of some newly released rice varieties (Sakha 108) and some promising lines GZ9399-4-1-1-3-2-2, GZ10101- 5-1-1-1 and GZ10154-3-1-1-1. Five nitrogen levels (i.e. 0, 55, 110, 165 and 220 kg N ha-1) were used. The results from both growing seasons indicated that, Sakha 108 recorded the highest grain yield while GZ10154 and GZ10101 recorded the lowest grain yields. A linear increase in grain yield was observed with continuous rate increase of nitrogen from 0 to 220 kg ha-1, while 220 kg N ha-1 treatment showed maximum grain yield followed by 165 kg N ha-1, with control as minimum. Agronomic nitrogen use efficiency (AE) for studied rice genotypes varied significantly, and ranged from 3.63 to 32.9 and from 2.72 to 34.12 kg grain yield produced per kg of nitrogen applied in 2016 and 2017 respectively. Across N levels, GZ9399 recorded the highest values of AE for the nitrogen fertilizer rate of 165 kg N ha-1 in both seasons.

scholarly journals Influence of Nitrogen Levels on Physiological Response, Nitrogen Use Efficiency and Yield of Rice (Oryza sativa L.) Genotypes

2020 ◽  
pp. 145-152
Author(s):  
Rajesh Kunta ◽  
Ramesh Thatikunta
Keyword(s):  
Nitrogen Use Efficiency ◽  
Oryza Sativa L ◽  
Maximum Yield ◽  
Growth And Yield ◽  
Spikelet Sterility ◽  
Rice Varieties ◽  
Nitrogen Use ◽  
Nitrogen Levels ◽  
Use Efficiency ◽  
Fertilizer Rates

A field experiment was conducted during 2011-12 to evaluate the efficiency of varying nitrogen fertilizer rates on growth and yield parameters, along with nitrogen use efficiency with two nitrogen levels 60 and 120 kg N ha-1 as main treatments and twenty six rice genotypes as sub treatments. Application of appropriate level of nitrogen fertilization is a major objective to increase nitrogen use efficiency by rice varieties. Among the genotypes, MTU-1001 recorded the maximum grain yield of 5021 kg ha-1 even under application of 60 kg N ha-1 with maximum NUE (Nitrogen Use Efficiency) in 60 kg N ha-1 (83.68) and minimum in 120 kg N ha-1 (45.53). NUE did not increase linearly with the amount of nitrogen application and higher nitrogen levels showed significantly lower NUE values. Maximum yield can be attributed to maximum SCMR (SPAD Chlorophyll meter reading) values, more photosynthetic rate, more tillers and panicles, more number of grains hill-1, maximum filled grain percentage and minimum spikelet sterility.

scholarly journals Nitrogen Use Efficiency of Local and National Aromatic Rice Varieties in Indonesia

2018 ◽  
Vol 5 (3) ◽  
pp. 79-88
Author(s):  
Chairunnisak Chairunnisak ◽  
Sugiyanta Sugiyanta ◽  
Edi Santosa
Keyword(s):  
Nitrogen Use Efficiency ◽  
N Uptake ◽  
Aromatic Rice ◽  
Rice Varieties ◽  
Nitrogen Use ◽  
N Content ◽  
Low Input ◽  
Plot Yield ◽  
Use Efficiency ◽  
Sampling Plot

Nitrogen use efficiency (NUE) is a necessitate in order to enhance sustainable rice farming in Indonesia. Thus, objective of present research was to evaluate NUE of local and national Indonesian superior aromatic rice treated with different levels of nitrogen fertilizer (N). Planting plot was arranged using five levels of N as the main plot, i.e; 0, 45, 90, 135 and 180 kg ha-1; and two rice varieties as subplot, i.e: Sigupai Abdya (local) and Inpari 23 Bantul (national). The results showed application 180 kg N ha-1 to Sigupai  Abdya significantly increased the plant height. However, it also postponed the flowering time. Inpari 23 Bantul treated with 180 kg N ha-1 produced the highest number of tillers. Combination of 90 kg N ha-1 with Sigupai Abdya variety significantly reduced the number of empty grains. Sigupai Abdya variety has a higher number of grains per panicle and sampling plot yield than Inpari 23 Bantul, and  dosage 90 kg N ha-1 increases grain yield per clump also sampling plot yield significantly. Nitrogen at 180 kg N ha-1 made Sigupai Abdya variety has high N content and absorption N in primordia phase, and the Inpari 23 Bantul variety had grain with high N content. Nitrogen at 90 kg ha-1 caused Sigupai Abdya variety at primordia phase had NUE higher than Inpari 23 Bantul. This study showed that local variety Sigupai Abdya is suitable for development as rice with low input NKeywords: Aceh aromatic, low input, nitrogen dose, N uptake, Oryza sativa L. 

scholarly journals Evaluation of N Efficiency Using Prilled Urea and Urea Super Granules in T. Aman Rice

2015 ◽  
Vol 18 (1) ◽  
pp. 59-63 ◽  
Author(s):  
J Hussain ◽  
M Salim ◽  
MA Siddique ◽  
M Khatun ◽  
S Islam
Keyword(s):  
Nitrogen Use Efficiency ◽  
Rice Varieties ◽  
Marginal Rate ◽  
Nitrogen Use ◽  
Prilled Urea ◽  
N Efficiency ◽  
Use Efficiency ◽  
Marginal Rate Of Return ◽  
Partial Factor Productivity ◽  
Partial Factor

An experiment was conducted at the Experimental field of Department of Agronomy, Bangladesh Agricultural University, Mymensingh, during June to December 2007 to evaluate the nitrogen use efficiency of transplant aman rice using prilled urea (PU) and urea super granule (USG). Three rice varieties (BR11, BRRI dhan30 and BRRI dhan39) were compared at three doses of nitrogen, i.e., PU@125 kg N ha-1, USG @170 kg N ha-1 and USG @ 70 kg N ha-1 in a Randomized Complete Block (RCB) design with three replications. USG each weighing 1 g and 2.6 g were placed manually at the depth of 8-10 cm in the middle of four hills in alternate rows at 12 days after transplanting and PU applied in split applications. The rice var. BR11 at USG @70 kg N ha-1 has produced the maximum grain yield (4.75 t ha-1) which was statistically identical to BRRI dhan30 at USG @ 70 kg N ha-1 (1 g pellet-1). The highest nitrogen use efficiency, partial factor productivity and marginal rate of return (1966%) were recorded from the treatment of BR11 at USG @ 70 kg N ha-1.Bangladesh Agron. J. 2015, 18(1): 59-63

scholarly journals The role of Plant Growth Promoting Bacteria in improving nitrogen use efficiency for sustainable crop production: a focus on wheat

2017 ◽  
Vol 3 (3) ◽  
pp. 413-434 ◽  
Author(s):  
Nilde Antonella Di Benedetto ◽  
◽  
Maria Rosaria Corbo ◽  
Daniela Campaniello ◽  
Mariagrazia Pia Cataldi ◽  
...  
Keyword(s):  
Plant Growth ◽  
Nitrogen Use Efficiency ◽  
Crop Production ◽  
Plant Growth Promoting Bacteria ◽  
Nitrogen Use ◽  
Sustainable Crop Production ◽  
Plant Growth Promoting ◽  
Use Efficiency ◽  
Growth Promoting

scholarly journals Leaf Photosynthesis, Nitrogen Use Efficiency, and Relationships with Growth and Yield in Teff

2020 ◽  
Author(s):  
Fekremariam Mihretie ◽  
Atsushi Tsunekawa ◽  
Wataru Tsuji ◽  
Mitsuru Tsubo ◽  
Nigussie Haregeweyn ◽  
...  
Keyword(s):  
Biomass Production ◽  
Nitrogen Use Efficiency ◽  
Photosynthetic Capacity ◽  
Growth And Yield ◽  
Yield Potential ◽  
Eragrostis Tef ◽  
Leaf Photosynthesis ◽  
Nitrogen Use ◽  
Yield Attributes ◽  
Use Efficiency

Abstract Background: Teff (Eragrostis tef (Zucc.) Trotter) is an important grain crop, but a paucity of research means that the mean yield is below 1.5 t ha−1. Its high genetic diversity has not been exploited to improve its yield potential. Previous efforts at increasing yield were based entirely on phenotypic, morphologic, and agronomic merits. However, photosynthetic capacity has been neglected, so its possible contributions to yield improvements remain unexplored. Results: We grew 15 teff cultivars in a controlled environment to explore variations in photosynthetic capacity and nitrogen use efficiency (NUE), and examined the relationships of gas exchange and NUE before anthesis with growth and yield attributes. Substantial differences were found in leaf photosynthetic rate (19 ± 9 μmol m−2 s−1, mean ± SD), stomatal conductance (0.11 ± 0.09 mol m−2 s−1), and transpiration rate (2.4 ± 1.3 mmol m−2 s−1). The cultivars differed significantly (P < 0.05) in both NUE (190 ± 227 g m−2) and photosynthetic NUE (59 ± 34 µmol g−1s−1). On average, the plants partitioned 29% of N to leaf, 28% to panicle, and 13% to stem before anthesis. Yield and biomass production were closely associated with photosynthetic capacity and NUE. Clustering of the cultivars on the basis of photosynthesis, NUE, growth, and yield indicates wide variations in photosynthetic capacity and NUE in the wider teff gene pool that should be exploited. Conclusion: We conclude that leaf photosynthesis and NUE are positively related to yield and biomass production in teff.

scholarly journals Effects of increased ammonia on root/shoot ratio, grain yield and nitrogen use efficiency of two wheat varieties with various N supply

2009 ◽  
Vol 55 (No. 7) ◽  
pp. 273-280 ◽  
Author(s):  
Jing Li ◽  
Shi-Qing Li ◽  
Yi Liu ◽  
Xiao-Li Chen
Keyword(s):  
Grain Yield ◽  
Nitrogen Use Efficiency ◽  
High Water ◽  
Growth And Yield ◽  
Resistant Variety ◽  
Wheat Varieties ◽  
Nitrogen Use ◽  
Positive Effects ◽  
Use Efficiency ◽  
N Treatment

The effects of elevated atmospheric NH<sub>3</sub> on growth and yield parameters of two winter wheat varieties, the high water and fertilizer-demanding variety Xiaoyan 6 (XY6) and the drought-resistant variety Changhan 58 (CH58), grown with two levels of N fertilization, were studied in Open-Top Chambers. The results showed that in combination with the high N treatment increasing the atmospheric NH<sub>3</sub> concentration to 1000 nl/l from the ambient level of 10 nl/l NH<sub>3</sub> significantly (<I>P</I> < 0.05) reduced the biomass and the root/shoot ratios of the plants, especially in XY6 plants, mainly because it negatively influenced root biomass production at anthesis and mature stages. In addition, the grain yield of XY6 was by 1.51% higher, while that of CH58 was 13.2% lower, following exposure to the elevated atmospheric NH<sub>3</sub> concentration rather than the ambient concentration in combination with the high N treatment. In contrast, in combination with the low N treatment, elevated atmospheric NH<sub>3</sub> had significantly and non-significantly positive effects on the grain yield of XY6 and CH58 plants, respectively. The Nitrogen Use Efficiency (NUE) and related parameters were all lower in plants of both varieties exposed to the high atmospheric NH3 concentration together with either the high or low N treatment.

scholarly journals Genome-wide associated study identifies NAC42-activated nitrate transporter conferring high nitrogen use efficiency in rice

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Weijie Tang ◽  
Jian Ye ◽  
Xiangmei Yao ◽  
Pingzhi Zhao ◽  
Wei Xuan ◽  
...  
Keyword(s):  
Nitrogen Use Efficiency ◽  
Negative Impact ◽  
Nitrate Transporter ◽  
High Nitrogen ◽  
Rice Varieties ◽  
Nitrogen Use ◽  
Genome Wide ◽  
Related Transcription Factor ◽  
Use Efficiency ◽  
Natural Variations

AbstractOver-application of nitrogen fertilizer in fields has had a negative impact on both environment and human health. Domesticated rice varieties with high nitrogen use efficiency (NUE) reduce fertilizer for sustainable agriculture. Here, we perform genome-wide association analysis of a diverse rice population displaying extreme nitrogen-related phenotypes over three successive years in the field, and identify an elite haplotype of nitrate transporter OsNPF6.1HapB that enhances nitrate uptake and confers high NUE by increasing yield under low nitrogen supply. OsNPF6.1HapB differs in both the protein and promoter element with natural variations, which are differentially trans-activated by OsNAC42, a NUE-related transcription factor. The rare natural allele OsNPF6.1HapB, derived from variation in wild rice and selected for enhancing both NUE and yield, has been lost in 90.3% of rice varieties due to the increased application of fertilizer. Our discovery highlights this NAC42-NPF6.1 signaling cascade as a strategy for high NUE and yield breeding in rice.

scholarly journals Identification of High Nitrogen Use Efficiency Phenotype in Rice (Oryza sativa L.) Through Entire Growth Duration by Unmanned Aerial Vehicle Multispectral Imagery

2021 ◽  
Vol 12 ◽  
Author(s):  
Ting Liang ◽  
Bo Duan ◽  
Xiaoyun Luo ◽  
Yi Ma ◽  
Zhengqing Yuan ◽  
...  
Keyword(s):  
Unmanned Aerial Vehicle ◽  
High Throughput ◽  
Nitrogen Use Efficiency ◽  
Developmental Stages ◽  
High Nitrogen ◽  
Growth Duration ◽  
Rice Varieties ◽  
Nitrogen Use ◽  
Aerial Vehicle ◽  
Use Efficiency

Identification of high Nitrogen Use Efficiency (NUE) phenotypes has been a long-standing challenge in breeding rice and sustainable agriculture to reduce the costs of nitrogen (N) fertilizers. There are two main challenges: (1) high NUE genetic sources are biologically scarce and (2) on the technical side, few easy, non-destructive, and reliable methodologies are available to evaluate plant N variations through the entire growth duration (GD). To overcome the challenges, we captured a unique higher NUE phenotype in rice as a dynamic time-series N variation curve through the entire GD analysis by canopy reflectance data collected by Unmanned Aerial Vehicle Remote Sensing Platform (UAV-RSP) for the first time. LY9348 was a high NUE rice variety with high Nitrogen Uptake Efficiency (NUpE) and high Nitrogen Utilization Efficiency (NUtE) shown in nitrogen dosage field analysis. Its canopy nitrogen content (CNC) was analyzed by the high-throughput UAV-RSP to screen two mixed categories (51 versus 42 varieties) selected from representative higher NUE indica rice collections. Five Vegetation Indices (VIs) were compared, and the Normalized Difference Red Edge Index (NDRE) showed the highest correlation with CNC (r = 0.80). Six key developmental stages of rice varieties were compared from transplantation to maturation, and the high NUE phenotype of LY9348 was shown as a dynamic N accumulation curve, where it was moderately high during the vegetative developmental stages but considerably higher in the reproductive developmental stages with a slower reduction rate. CNC curves of different rice varieties were analyzed to construct two non-linear regression models between N% or N% × leaf area index (LAI) with NDRE separately. Both models could determine the specific phenotype with the coefficient of determination (R2) above 0.61 (Model I) and 0.86 (Model II). Parameters influencing the correlation accuracy between NDRE and N% were found to be better by removing the tillering stage data, separating the short and long GD varieties for the analysis and adding canopy structures, such as LAI, into consideration. The high NUE phenotype of LY9348 could be traced and reidentified across different years, locations, and genetic germplasm groups. Therefore, an effective and reliable high-throughput method was proposed for assisting the selection of the high NUE breeding phenotype.

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