Email: Samantha.harvie@research.uwa.edu.au

Understanding the impact of nitrogen on wheat protein composition is crucial for enhancing the agronomic and commercial value of wheat. My research utilises a proteomic approach to analyse how different nitrogen management strategies effect the grain protein composition of wheat grown in the arid Western Australian soils.

The significance of my research stems from the need to optimise nitrogen utilisation while improving wheat grain quality without compromising yield.

To examine the influence of nitrogen on wheat protein composition, I performed a range of field and glasshouse trials and analysed plant development, yield and protein content in relation to the amount and timing of nitrogen applications. I identified specific changes in protein composition resulting from the different nitrogen application strategies. The findings of my research confirm that nitrogen application in terms of the amount and timing of nitrogen can significantly influence wheat grain protein composition, which could lead to downstream grain quality changes.

The contribution of my research provides valuable insights into the proteomic alterations associated with nitrogen management and suggests that protein composition can be altered through targeted nitrogen application strategies. Additionally, these findings will help develop protein targets for bioassays of harvested grain to guide future nitrogen management practices.

My research highlights the critical role of nitrogen management in shaping wheat protein composition and establishes a scientific foundation for advancing more sustainable and productive agricultural practices with potential lower nitrogen inputs. I will present the agronomic and proteomic outcomes of our trials on nitrogen application strategies, highlighting their implications for future wheat production.