Journal article
Source and sink mechanisms of nitrogen transport and use
The New phytologist, Vol.217(1), pp.35-53
01/2018
Handle:
https://hdl.handle.net/2376/108423
PMID: 29120059
Abstract
Contents
Summary
35
I.
Introduction
35
II.
Nitrogen acquisition and assimilation
36
III.
Root‐to‐shoot transport of nitrogen
38
IV.
Nitrogen storage pools in vegetative tissues
39
V.
Nitrogen transport from source leaf to sink
40
VI.
Nitrogen import into sinks
42
VII.
Relationship between source and sink nitrogen transport processes and metabolism
43
VIII.
Regulation of nitrogen transport
43
IX.
Strategies for crop improvement
44
X.
Conclusions
46
Acknowledgements
47
References
47
Summary
Nitrogen is an essential nutrient for plant growth. World‐wide, large quantities of nitrogenous fertilizer are applied to ensure maximum crop productivity. However, nitrogen fertilizer application is expensive and negatively affects the environment, and subsequently human health. A strategy to address this problem is the development of crops that are efficient in acquiring and using nitrogen and that can achieve high seed yields with reduced nitrogen input. This review integrates the current knowledge regarding inorganic and organic nitrogen management at the whole‐plant level, spanning from nitrogen uptake to remobilization and utilization in source and sink organs. Plant partitioning and transient storage of inorganic and organic nitrogen forms are evaluated, as is how they affect nitrogen availability, metabolism and mobilization. Essential functions of nitrogen transporters in source and sink organs and their importance in regulating nitrogen movement in support of metabolism, and vegetative and reproductive growth are assessed. Finally, we discuss recent advances in plant engineering, demonstrating that nitrogen transporters are effective targets to improve crop productivity and nitrogen use efficiency. While inorganic and organic nitrogen transporters were examined separately in these studies, they provide valuable clues about how to successfully combine approaches for future crop engineering.
Metrics
5 Record Views
Details
- Title
- Source and sink mechanisms of nitrogen transport and use
- Creators
- Mechthild Tegeder - Washington State UniversityCéline Masclaux‐Daubresse - Saclay Plant Sciences
- Publication Details
- The New phytologist, Vol.217(1), pp.35-53
- Academic Unit
- Biological Sciences, School of
- Number of pages
- 19
- Grant note
- US National Science Foundation (IOS‐1457183) USDA National Institute of Food and Agriculture (2017‐67013‐26158)
- Identifiers
- 99900547691701842
- Language
- English
- Resource Type
- Journal article