Journal article
Intraspecific variation in leaf growth of wheat (Triticum aestivum) under Australian Grain Free Air CO2 Enrichment (AGFACE): Is it regulated through carbon and/or nitrogen supply?
CL Thilakarathne, S Tausz-Posch, K Cane, RM Norton, GJ Fitzgerald, M Tausz, S Seneweera
Functional Plant Biology | CSIRO PUBLISHING | Published : 2015
DOI: 10.1071/FP14125
Abstract
Underlying physiological mechanisms of intraspecific variation in growth response to elevated CO2 concentration [CO2] were investigated using two spring wheat (Triticum aestivum L.) cultivars: Yitpi and H45. Leaf blade elongation rate (LER), leaf carbon (C), nitrogen (N) in the expanding leaf blade (ELB, sink) and photosynthesis (A) and C and N status in the last fully expanded leaf blade (LFELB, source) were measured. Plants were grown at ambient [CO2] (∼384molmol-1) and elevated [CO2] (∼550molmol-1) in the Australian Grains Free Air CO2 Enrichment facility. Elevated [CO2] increased leaf area and total dry mass production, respectively, by 42 and 53% for Yitpi compared with 2 and 13% for H4..
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Funding Acknowledgements
This research was supported by funding from the Australian Commonwealth Department for Agriculture, Fisheries and Forestry (DAFF) and the Grains Research and Development Corporation (GRDC) as part of their support to projects related to the Australian Grains Free AirCO<INF>2</INF> Enrichment(AGFACE) facility, which is jointly run by the Victorian State Department of Primary Industries (DPI) and the University of Melbourne. Chamindathee Lakmini Thilakarathne was supported through a bilateral grant aid from AusAID.