Root extension and nitrate transporter up-regulation induced by nitrogen deficiency improves nitrogen status and plant growth at the seedling stage of winter wheat (Triticum aestivum L.)

Jiang, Suyu; Sun, Jianyun; Tian, Zhigang; Hu, Hang; Michel, Elena J.S.; Gao, Jingwen; Jiang, Dong; Cao, Weixing; Dai, Tingbo

doi:10.1016/j.envexpbot.2017.06.006

Cited by 81 publications

(40 citation statements)

References 51 publications

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“…Nitrogen accumulation during the vegetative growth stage was closely related to the ability of roots to take up N. Roots determine N uptake ability and play a primary role in changes in this process by altering their morphological characteristics (Qin et al, 2018), physiological properties (Jin et al, 2015), and gene expression (Jiang et al, 2017) in a manner that varies among cultivars. Shi et al (2012) found that roots grew and proliferated rapidly from jointing to anthesis, especially in the upper soil layer, and that N topdressed at the jointing stage was rapidly taken up as a result of high root density.…”

Section: Discussionmentioning

confidence: 99%

“…Thus it can be asked whether genes for N transporters determine N efficiency in plant species. Jiang et al (2017) found that TaNRT and ammonium transporter gene upregulation was induced by low N status, improving N content and plant growth at the seedling stage. Nitrate uptake is well correlated with the expression level of the TaNRT2.1 gene, which codes for a root NO 3 − transporter that appears to play a major role in postanthesis NO 3 − uptake (Taulemesse et al, 2015).…”

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confidence: 99%

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Preanthesis Root Growth and Nitrogen Uptake Improved Wheat Grain Yield and Nitrogen Use Efficiency

et al. 2019

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Grain yield and N fertilizer use efficiency (NUE) are closely related to preanthesis root growth and distribution, whereas changes in root morphology and distribution, plants’ N uptake and utilization ability, and their relationships with grain yield and NUE remain unclear. We conducted a 2‐yr microplot and sand culture experiment using three wheat (Triticum aestivum L.) cultivars (N‐efficient, intermediate, and N‐inefficient) to examine differences in grain yield, NUE, root growth, root morphology, root distribution, and nitrate transporter gene (TaNRT) expression. The N‐efficient wheat cultivar increased grain yield and NUE by improving preanthesis N uptake. Root biomass, growth rate, length, surface area, and weight density were higher in the N‐efficient cultivar than in other cultivars at preanthesis. The N‐efficient cultivar distributed more roots throughout the topsoil layer. The TaNRT expression level at preanthesis was higher in the N‐efficient cultivar than in the intermediate cultivar, whereas no significant genotypic difference was observed after anthesis. This result indicates that TaNRT upregulation increased N efficiency through a higher preanthesis N uptake and that TaNRT 1.1 and TaNRT 1.2 played a more important role than TaNRT 2.1 and TaNRT 2.2. Nitrate reductase and glutamine synthetase activity increased in the N‐efficient cultivar at the preanthesis stage and decreased after anthesis. These results indicate that the N‐efficient wheat cultivar had higher preanthesis root growth and N uptake ability, promoting leaf N assimilation ability and improving wheat yield and NUE. Core Ideas Yield and N use efficiency were comparable among different N‐efficient wheat cultivars. The N‐efficient wheat cultivar increased preanthesis N accumulation. The N‐efficient wheat cultivar showed faster root growth and greater root distribution in the soil.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

Preanthesis Root Growth and Nitrogen Uptake Improved Wheat Grain Yield and Nitrogen Use Efficiency

et al. 2019

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“…It has been known and well established that plants have evolved and altered different NO 3 − transporters to cope with N stress [15,26]. To understand the molecular responses of the two wheat cultivars to N deficiency, we chose to determine the expression of the N-responsive marker genes, the high affinity NO 3 − transporters along with the functional partner, in different scheduled time points by using quantitative RT-PCR (qRT-PCR).…”

Section: Differential Expression Of Marker Genes Was Induced By Nitromentioning

confidence: 99%

“…It is generally accepted that nitrate (NO 3 − ) is the favored form of N from soil for wheat growth [15][16][17]. It has been reported that there are two classes of NO 3 − transport systems, low-affinity transport systems (LATS), and high-affinity transport systems (HATS), governing NO 3 − uptake in plants, depending on the external NO 3 − concentration [18,19].…”

Section: Introductionmentioning

confidence: 99%

Physiological and Proteomic Dissection of the Responses of Two Contrasting Wheat Genotypes to Nitrogen Deficiency

Karim

Wang

Zheng

et al. 2020

IJMS

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Nitrogen deficiency usually occurs along with aluminum toxicity in acidic soil, which is one of the major constraints for wheat production worldwide. In order to compare adaptive processes to N deficiency with different Al-tolerant wheat cultivars, we chose Atlas 66 and Scout 66 to comprehensively analyze the physiological responses to N deficiency, coupled with label-free mass spectrometry-based proteomics analysis. Results showed that both cultivars were comparable in most physiological indexes under N deficient conditions. However, the chlorophyll content in Scout 66 was higher than that of Atlas 66 under N deficiency. Further proteomic analysis identified 5592 and 5496 proteins in the leaves of Atlas 66 and Scout 66, respectively, of which 658 and 734 proteins were shown to significantly change in abundance upon N deficiency, respectively. The majority of the differentially expressed proteins were involved in cellular N compound metabolic process, photosynthesis, etc. Moreover, tetrapyrrole synthesis and sulfate assimilation were particularly enriched in Scout 66. Our findings provide evidence towards a better understanding of genotype-dependent responses under N deficiency which could help us to develop N efficient cultivars to various soil types.

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“…In plants, NH 4 + assimilation is a proton‐generating process. Plants pump H + into their soil solution (or growth medium), and this plays an important role in maintaining cytosolic pH homeostasis (Palmgren ; Jiang et al ). For example, NH 4 + uptake depolarizes the plasma membrane (PM) potential and increases net H + release in rice roots (Xu et al ).…”

Section: Introductionmentioning

confidence: 99%

Efficient iron plaque formation on tea (Camellia sinensis) roots contributes to acidic stress tolerance

Zhang

Chen

et al. 2018

JIPB

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Tea plants grow in acidic soil, but to date, their intrinsic mechanisms of acidic stress tolerance have not been elucidated. Here, we assessed the tea plant response to growth on NH nutrient media having different pH and iron levels. When grown in standard NH nutrient solution (iron insufficient, 0.35 mg L Fe ), tea roots exhibited significantly lower nitrogen accumulation, plasma membrane H -ATPase activity, and protein levels; net H efflux was lower at pH 4.0 and 5.0 than at pH 6.0. Addition of 30 mg L Fe (iron sufficient, mimicking normal soil Fe concentrations) to the NH nutrient solution led to more efficient iron plaque formation on roots and increased root plasma membrane H -ATPase levels and activities at pH 4.0 and 5.0, compared to the pH 6.0 condition. Furthermore, plants grown at pH 4.0 and 5.0, with sufficient iron, exhibited significantly higher nitrogen accumulation than those grown at pH 6.0. Together, these results support the hypothesis that efficient iron plaque formation, on tea roots, is important for acidic stress tolerance. Furthermore, our findings establish that efficient iron plaque formation is linked to increased levels and activities of the tea root plasma membrane H -ATPase, under low pH conditions.

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Root extension and nitrate transporter up-regulation induced by nitrogen deficiency improves nitrogen status and plant growth at the seedling stage of winter wheat (Triticum aestivum L.)

Cited by 81 publications

References 51 publications

Preanthesis Root Growth and Nitrogen Uptake Improved Wheat Grain Yield and Nitrogen Use Efficiency

Preanthesis Root Growth and Nitrogen Uptake Improved Wheat Grain Yield and Nitrogen Use Efficiency

Physiological and Proteomic Dissection of the Responses of Two Contrasting Wheat Genotypes to Nitrogen Deficiency

Efficient iron plaque formation on tea (Camellia sinensis) roots contributes to acidic stress tolerance

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