Improving nitrogen use efficiency in plants: effective phenotyping in conjunction with agronomic and genetic approaches
Giao N. Nguyen A and Surya Kant A B
+ Author Affiliations
- Author Affiliations
A Agriculture Victoria, Grains Innovation Park, 110 Natimuk Road, Horsham, Vic. 3400, Australia.
B Corresponding author. Email: surya.kant@ecodev.vic.gov.au
Functional Plant Biology 45(6) 606-619 https://doi.org/10.1071/FP17266
Submitted: 26 September 2017 Accepted: 4 January 2018 Published: 8 February 2018
Abstract
For global sustainable food production and environmental benefits, there is an urgent need to improve N use efficiency (NUE) in crop plants. Excessive and inefficient use of N fertiliser results in increased crop production costs and environmental pollution. Therefore, cost-effective strategies such as proper management of the timing and quantity of N fertiliser application, and breeding for better varieties are needed to improve NUE in crops. However, for these efforts to be feasible, high-throughput and reliable phenotyping techniques would be very useful for monitoring N status in planta, as well as to facilitate faster decisions during breeding and selection processes. This review provides an insight into contemporary approaches to phenotyping NUE-related traits and associated challenges. We discuss recent and advanced, sensor- and image-based phenotyping techniques that use a variety of equipment, tools and platforms. The review also elaborates on how high-throughput phenotyping will accelerate efforts for screening large populations of diverse genotypes in controlled environment and field conditions to identify novel genotypes with improved NUE.
Additional keywords: biosensors, chlorophyll pigments, N metabolism, plant phenomics.
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