Editorial: Nitrogen Use Efficiency and Sustainable Nitrogen Management in Crop Plants

Raghuram, Nandula; Aziz, Tariq; Kant, Surya; Zhou, Jianbin; Schmidt, Susanne

doi:10.3389/fpls.2022.862091

Cited by 10 publications

(4 citation statements)

References 6 publications

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“…On arrival at the collection phloem, sucrose is imported into the transport phloem through a high concentration gradient (2) and then to the release phloem (3), where it is unloaded at the sink organ by sucrose transporters (SUTs) (4). Sucrose is unloaded through either symplastic or apoplastic paths depending on the plant species and its developmental stages (5). Cotton is used as the model plant for illustration.…”

Section: Nitrogen Assimilation and Partitioning Processesmentioning

confidence: 99%

“…The process of N assimilation is illustrated in Figure 1. The synthesised amino acids are transiently stored in the source leaves and then relocated to the sink organ 4,5 . Sink organs, such as flowers, fruits, seeds, and younger leaves, are known as the primary reserve for C and N assimilates, while source organs, such as older leaves and green plant parts, produce and export photoassimilates through photosynthesis.…”

Section: Introductionmentioning

confidence: 99%

“…The synthesised amino acids are transiently stored in the source leaves and then relocated to the sink organ. 4,5 Sink organs, such as flowers, fruits, seeds, and younger leaves, are known as the primary reserve for C and N assimilates, while source organs, such as older leaves and green plant parts, produce and export photoassimilates through photosynthesis. However, it is worth noting that not all sink organs have equal capacity to store C and N assimilates, and the relative contributions of different source organs to overall productivity can vary depending on the plant species and environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

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The interplay of carbon and nitrogen distribution: Prospects for improved crop yields

2023

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Growth and productivity of plants primarily depend on the balanced distribution of carbon (C) and nitrogen (N) among different organs. Previous studies on crop improvement have focussed on the C or N assimilation and distribution. However, recent findings reveal that C and N form a complex integrated network and are often dependent on each other to affect crop productivity. The underlying physiological and molecular mechanisms involved in the coordinated distribution of C and N among different plant organs are yet to be fully uncovered. Crucial roles in regulating C and N balance are played by transporters that mediate their movement across different organs. In Cotton, which has an indeterminate growth pattern, source-sink assimilate distribution could be a major bottleneck impeding fibre productivity. This review summarises our current understanding of C and N transport mechanisms, explores and compares different physiological and molecular approaches involved in the C-N distribution cascade, including cotton and other plant species. A comprehensive understanding of these integrated regulatory mechanisms is crucial for improving crop yields and fibre productivity.

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Section: Nitrogen Assimilation and Partitioning Processesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The interplay of carbon and nitrogen distribution: Prospects for improved crop yields

2023

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“…It is evident that there is no better alternative to efficient fertiliser management than to cut down on this cost amidst the global population surge. International organisations, particularly the International Nitrogen Initiative (INI), with intergovernmental recognition, have initiated a campaign to attract the attention of the scientific community to exert concerted efforts in understanding the ways to overcome the overwhelming challenges posed by agricultural activities, fossil fuel combustion and other anthropogenic sources (Raghuram et al, 2022). A key resolution to manage this crisis is a paradigm shift from highlighting the impact of excessive N pollution to designing sustainable strategies for NUE for improvement in plants (Steffen et al, 2015; Sutton et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Genetic regulation of nitrogen use efficiency in Gossypium spp

Ninkuu

Zhixin

Sun

2023

Plant Cell & Environment

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Cotton (Gossypium spp.) is the most important fibre crop, with desirable characteristics preferred for textile production. Cotton fibre output relies heavily on nitrate as the most important source of inorganic nitrogen (N). However, nitrogen dynamics in extreme environments limit plant growth and lead to yield loss and pollution. Therefore, nitrogen use efficiency (NUE), which involves the utilisation of the ‘right rate’, ‘right source’, ‘right time’, and ‘right place’ (4Rs), is key for efficient N management. Recent omics techniques have genetically improved NUE in crops. We herein highlight the mechanisms of N uptake and assimilation in the vegetative and reproductive branches of the cotton plant while considering the known and unknown regulatory factors. The phylogenetic relationships among N transporters in four Gossypium spp. have been reviewed. Further, the N regulatory genes that participate in xylem transport and phloem loading are also discussed. In addition, the functions of microRNAs and transcription factors in modulating the expression of target N regulatory genes are highlighted. Overall, this review provides a detailed perspective on the complex N regulatory mechanism in cotton, which would accelerate the research toward improving NUE in crops.

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Reactive Nitrogen in Climate Change, Crop Stress, and Sustainable Agriculture

Raghuram

2023

Global Climate Change and Plant Stress Management

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Editorial: Nitrogen Use Efficiency and Sustainable Nitrogen Management in Crop Plants

Cited by 10 publications

References 6 publications

The interplay of carbon and nitrogen distribution: Prospects for improved crop yields

The interplay of carbon and nitrogen distribution: Prospects for improved crop yields

Genetic regulation of nitrogen use efficiency in Gossypium spp

Reactive Nitrogen in Climate Change, Crop Stress, and Sustainable Agriculture

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