Book Chapter
Elevated Atmospheric CO2 Affects Grain Sulfur Concentration and Grain Nitrogen/Sulfur Ratio of Wheat (Triticum aestivum L.)
Nimesha Fernando, Joe Panozzo, Michael Tausz, Robert M Norton, Glenn Fitzgerald, Saman Seneweera
SPRINGER | Published : 2012
Abstract
Wheat (Triticum aestivum L. cv. Yitpi) was grown under field conditions in the Australian Grains Free-Air Carbon Dioxide Enrichment (AGFACE) facility during the 2008 and 2009 growing seasons. Current atmospheric (384 μmol mol−1) and elevated CO2 concentration (550 μmol mol−1) were combined with two different times of sowing (TOS). The “normal sowing” date (TOS1) contrasted with “late sowing” (TOS2) to provide different growing conditions including higher temperatures during grain filling. Nitrogen (N) and sulfur (S) concentrations and N/S ratios were analyzed in mature grains. Elevated CO2 concentration significantly reduced grain N by 12.3% and 13.1%, and S concentration by 4.8% and 9.9% in..
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Funding Acknowledgements
Research at the Australian Grains Free Air CO 2 Enrichment (AGFACE) facility is jointly run by the Victorian State Department of Primary Industries and the University of Melbourne. The authors gratefully acknowledge fi nancial support by the Australian Commonwealth Department of Agriculture, Fisheries and Forestry (DAFF), The Grains Research and Development Corporation (GRDC), and the International Plant Nutrition Institute. We thank Mahabubur Mollah, research engineer, for operating the AGFACE facilities, and Ivan Mock for site management in Walpeup. Peter Howie, Cassandra Walker, Nathan Neumann, and Russel Argall and the AGFACE team are gratefully acknowledged for their technical support.