Foliar N application at anthesis alters grain protein composition and enhances baking quality in winter wheat only under a low N fertiliser regimen

A - Papers appearing in refereed journals

Rossmann, A., Buchner, P. H., Savill, G. P., Hawkesford, M. J., Scherf, K. A. and Muhling, K. H. 2019. Foliar N application at anthesis alters grain protein composition and enhances baking quality in winter wheat only under a low N fertiliser regimen. European Journal of Agronomy. 109, p. 125909.

AuthorsRossmann, A., Buchner, P. H., Savill, G. P., Hawkesford, M. J., Scherf, K. A. and Muhling, K. H.
Abstract

Wheat is the second biggest staple crop worldwide and is mainly consumed in the form of baked goods, requiring a specific flour quality. Grain protein concentration (GPC) is an underpinning parameter for baking quality and therefore strongly influences the value of wheat. It is a common strategy to increase GPC by combining high protein varieties with the application of a late dose of nitrogen. However, the late use of N fertilisers can cause environmental problems, such as nitrate leaching and gaseous losses. Furthermore, recent studies show, that there is only a weak relationship between GPC and bread volume. The aim of this study was to re-evaluate the merits of a late N application by investigating the effects of a late foliar N application, not only on GPC, but also on the gluten protein composition and on bread volume.
In this study, an increasing GPC did not necessarily lead to improved baking quality. Baking performance rather depended on the grain protein composition. Only at a low N fertiliser level (100 kg N ha-1), the foliar N application decreased the HMW-GS/LMW-GS ratio and increased the gliadin/HMW-GS ratio, which led to an improved bread volume. These results imply that a late foliar N application can be used to effectively improve baking quality when the total N uptake was low due to low fertilisation or unfavourable weather conditions. The results also show that quality cannot be evaluated by measuring GPC alone but also needs information of storage protein composition as well as bread volume.

KeywordsNitrogen; Wheat; Gliadin; Glutenin; Bread volume
Year of Publication2019
JournalEuropean Journal of Agronomy
Journal citation109, p. 125909
Digital Object Identifier (DOI)doi:10.1016/j.eja.2019.04.004
Open accessPublished as ‘gold’ (paid) open access
Funder project or code[20:20 Wheat] Maximising yield potential of wheat
Designing Future Wheat - WP1 - Increased efficiency and sustainability
Wheat Genetic Improvement Network
Project: 2097
FunderBiotechnology and Biological Sciences Research Council
Department of Environment, Food and Rural Affairs
Publisher's versionRossman EJA 2019.pdf
Accepted author manuscriptRossman et al 2019_EJoA submitted manuscript.pdf
Output statusPublished
Publication dates
Online01 May 2019
Publication process dates
Accepted16 Apr 2019
PublisherElsevier Science Bv
ISSN1161-0301

Permalink - https://repository.rothamsted.ac.uk/item/8wqy0/foliar-n-application-at-anthesis-alters-grain-protein-composition-and-enhances-baking-quality-in-winter-wheat-only-under-a-low-n-fertiliser-regimen

Total views: 8

Total downloads: 34

Views this month: 0

Downloads this month: 6