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Advances in the understanding of nitrogen (N) uptake by plant roots

Code: 9781786769992
Malcolm J. Hawkesford and William R. Whalley, Rothamsted Research, UK

Chapter synopsis:  Efficient use of nitrogen (N) by plants and particularly crops, is of global importance. In agriculture, high crop yields and protein content depend upon extensive N-inputs, however fertilizer N is costly to the farmer, and overuse can be damaging to the environment. A critical component of optimised usage is efficient capture by crop root systems. This chapter focusses on principal mechanisms of uptake and factors influencing efficiency. Genetic variation in root architecture and in an array of transporters known to be involved in nitrogen capture is detailed. The impacts of abiotic stress factors such as soil structure are described. Finally prospects and opportunities for crop improvement are discussed.

DOI: 10.19103/AS.2020.0075.15
Table of contents 1 Introduction 2 Nitrogen in the soil 3 Nitrogen uptake and NUE in agriculture 4 Genetic variation in NUE and roots 5 Transporters involved in nitrogen uptake 6 Root responses to nitrogen availability 7 Effects of soil conditions and structure on root N-uptake and proliferation 8 Future trends for crop improvement 9 Acknowledgements 10 Where to look for further information 11 References

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