Physiological and Molecular Traits Associated with Nitrogen Uptake under Limited Nitrogen in Soft Red Winter Wheat

Lamichhane, Suman; Murata, Chiaki; Griffey, Carl A.; Thomason, Wade E.; Fukao, T.

doi:10.3390/plants10010165

Cited by 9 publications

(5 citation statements)

References 41 publications

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“…This last result would seem to confirm the findings of other experiments on wheat and other species that have shown close relationships between the overall N accumulated in the canopy and the leaf area [44,45]. Furthermore, other studies have highlighted significant relationships between root traits (length, distribution, and density in the different soil layers), grain yield, nutrient uptake capacity, and water use efficiency [23,[46][47][48][49][50].…”

Section: Discussionsupporting

confidence: 88%

Morphological and Physiological Root Traits and Their Relationship with Nitrogen Uptake in Wheat Varieties Released from 1915 to 2013

et al. 2021

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Identifying genotypes with a greater ability to absorb nitrogen (N) may be important to reducing N loss in the environment and improving the sustainability of agricultural systems. This study extends the knowledge of variability among wheat genotypes in terms of morphological or physiological root traits, N uptake under conditions of low soil N availability, and in the amount and rapidity of the use of N supplied with fertilizer. Nine genotypes of durum wheat were chosen for their different morpho-phenological characteristics and year of their release. The isotopic tracer 15N was used to measure the fertilizer N uptake efficiency. The results show that durum wheat breeding did not have univocal effects on the characteristics of the root system (weight, length, specific root length, etc.) or N uptake capacity. The differences in N uptake among the studied genotypes when grown in conditions of low N availability appear to be related more to differences in uptake efficiency per unit of weight and length of the root system than to differences in the morphological root traits. The differences among the genotypes in the speed and the ability to take advantage of the greater N availability, determined by N fertilization, appear to a certain extent to be related to the development of the root system and the photosynthesizing area. This study highlights some variability within the species in terms of the development, distribution, and efficiency of the root system, which suggests that there may be sufficient grounds for improving these traits with positive effects in terms of adaptability to difficult environments and resilience to climate change.

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Section: Discussionsupporting

confidence: 88%

Morphological and Physiological Root Traits and Their Relationship with Nitrogen Uptake in Wheat Varieties Released from 1915 to 2013

et al. 2021

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“…Our results also confirmed these findings that the increased kernel weight could balance the decrease in grain number per unit area (Giunta et al, 2019), and the genetic variation in grain protein deviation was mainly determined by post-anthesis N uptake, rather than N remobilization efficiency (Mosleth et al, 2015). Furthermore, previous results have shown that post-anthesis N uptake was determined by genotype, and correlated positively with the root nitrate reductase gene (Zhao et al, 2013) and root system vigor (Nigro et al, 2019;Lamichhane et al, 2021). Further analysis is required to analyze the contribution of N capture genes to grain protein deviation.…”

Section: Post-anthesis N Uptake Contributed To Simultaneous Improveme...mentioning

confidence: 99%

Simultaneously genetic selection of wheat yield and grain protein quality in rice–wheat and soybean–wheat cropping systems through critical nitrogen efficiency-related traits

Chen

Wang²,

Chen³

et al. 2022

Front. Plant Sci.

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Analyzing the contribution of nitrogen (N) uptake and its utilization in grain yield and protein quality-related traits in rice-wheat (RW) and soybean-wheat (SW) cropping systems is essential for simultaneous improvements in the two target traits. A field experiment with nine wheat genotypes was conducted in 2018–19 and 2019–20 cropping years to investigate N uptake and utilization-related traits associated with high wheat yield and good protein quality. Results showed that N uptake efficiency (NUpE) in the RW cropping system and N utilization efficiency (NUtE) in the SW cropping system explained 77.6 and 65.2% of yield variation, respectively, due to the contribution of fertile spikes and grain number per spike to grain yield varied depending on soil water and N availability in the two rotation systems. Lower grain protein content in the RW cropping system in comparison to the SW cropping system was mainly related to lower individual N accumulation at maturity, resulting from higher fertile spikes, rather than N harvest index (NHI). However, NHI in the SW cropping system accounted for greater variation in grain protein content. Both gluten index and post-anthesis N uptake were mainly affected by genotype, and low gluten index caused by high post-anthesis N uptake may be related to the simultaneous increase in kernel weight. N remobilization process associated with gluten quality was driven by increased sink N demand resulting from high grain number per unit area in the RW cropping system; confinement of low sink N demand and source capability resulted in low grain number per spike and water deficit limiting photosynthesis of flag leaf in the SW cropping system. CY-25 obtained high yield and wet gluten content at the expense of gluten index in the two wheat cropping systems, due to low plant height and high post-anthesis N uptake and kernel weight. From these results, we concluded that plant height, kernel weight, and post-anthesis N uptake were the critically agronomic and NUE-related traits for simultaneous selection of grain yield and protein quality. Our research results provided useful guidelines for improving both grain yield and protein quality by identifying desirable N-efficient genotypes in the two rotation systems.

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“…According to Bonnave and Bertin (2018), higher NUE is also responsible for conferring salt resilience in rice. It has been revealed that salt-tolerant wheat lines retained higher yield and yield-related attributes, as well as the maximum NUE indexes, compared to salt-sensitive wheat lines, which could be accountable to the greater N uptake proficiency in the tolerant genotype (Lamichhane et al, 2021). Nitrogen application at the proper dose and timings may also minimize N losses and increase efficiency.…”

Section: Regulation Of Nitrogen Metabolism and Nitrogen Use Efficienc...mentioning

confidence: 99%

Sustaining nitrogen dynamics: A critical aspect for improving salt tolerance in plants

et al. 2023

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In the current changing environment, salt stress has become a major concern for plant growth and food production worldwide. Understanding the mechanisms of how plants function in saline environments is critical for initiating efforts to mitigate the detrimental effects of salt stress. Agricultural productivity is linked to nutrient availability, and it is expected that the judicious metabolism of mineral nutrients has a positive impact on alleviating salt-induced losses in crop plants. Nitrogen (N) is a macronutrient that contributes significantly to sustainable agriculture by maintaining productivity and plant growth in both optimal and stressful environments. Significant progress has been made in comprehending the fundamental physiological and molecular mechanisms associated with N-mediated plant responses to salt stress. This review provided an (a) overview of N-sensing, transportation, and assimilation in plants; (b) assess the salt stress-mediated regulation of N dynamics and nitrogen use- efficiency; (c) critically appraise the role of N in plants exposed to salt stress. Furthermore, the existing but less explored crosstalk between N and phytohormones has been discussed that may be utilized to gain a better understanding of plant adaptive responses to salt stress. In addition, the shade of a small beam of light on the manipulation of N dynamics through genetic engineering with an aim of developing salt-tolerant plants is also highlighted.

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Physiological and Molecular Traits Associated with Nitrogen Uptake under Limited Nitrogen in Soft Red Winter Wheat

Cited by 9 publications

References 41 publications

Morphological and Physiological Root Traits and Their Relationship with Nitrogen Uptake in Wheat Varieties Released from 1915 to 2013

Morphological and Physiological Root Traits and Their Relationship with Nitrogen Uptake in Wheat Varieties Released from 1915 to 2013

Simultaneously genetic selection of wheat yield and grain protein quality in rice–wheat and soybean–wheat cropping systems through critical nitrogen efficiency-related traits

Sustaining nitrogen dynamics: A critical aspect for improving salt tolerance in plants

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