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    Small amounts of ammonium (NH4$^{+}$) can increase growth of maize (Zea mays)

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    Name:
    small amount_jpln.201500625.pdf
    Size:
    1.228Mb
    Format:
    PDF
    Description:
    Accepted manuscript
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    Type
    Article
    Authors
    George, Jessey
    Holtham, Luke
    Sabermanesh, Kasra
    Heuer, Sigrid
    Tester, Mark A. cc
    Plett, Darren
    Garnett, Trevor
    KAUST Department
    Biological and Environmental Science and Engineering (BESE) Division
    Center for Desert Agriculture
    Plant Science
    Plant Science Program
    The Salt Lab
    Date
    2016-09-16
    Online Publication Date
    2016-09-16
    Print Publication Date
    2016-12
    Permanent link to this record
    http://hdl.handle.net/10754/622124
    
    Metadata
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    Abstract
    Nitrate (NOequation image) and ammonium (NHequation image) are the predominant forms of nitrogen (N) available to plants in agricultural soils. Nitrate concentrations are generally ten times higher than those of NHequation image and this ratio is consistent across a wide range of soil types. The possible contribution of these small concentrations of NHequation image to the overall N budget of crop plants is often overlooked. In this study the importance of this for the growth and nitrogen budget of maize (Zea mays L.) was investigated, using agriculturally relevant concentrations of NHequation image. Maize inbred line B73 was grown hydroponically for 30 d at low (0.5 mM) and sufficient (2.5 mM) levels of NOequation image. Ammonium was added at 0.05 mM and 0.25 mM to both levels of NOequation image. At low NOequation image levels, addition of NHequation image was found to improve the growth of maize plants. This increased plant growth was accompanied by an increase in total N uptake, as well as total phosphorus, sulphur and other micronutrients in the shoot. Ammonium influx was higher than NOequation image influx for all the plants and decreased as the total N in the nutrient medium increased. This study shows that agriculturally relevant proportions of NHequation image supplied in addition to NOequation image can increase growth of maize.
    Citation
    George, J., Holtham, L., Sabermanesh, K., Heuer, S., Tester, M., Plett, D., & Garnett, T. (2016). Small amounts of ammonium (NH$ _4^+ $) can increase growth of maize (Zea mays). Journal of Plant Nutrition and Soil Science, 179(6), 717–725. doi:10.1002/jpln.201500625
    Sponsors
    The authors would like to acknowledge the technical assistance provided by research and technical staff at Australian Centre for Plant Functional Genomics (ACPFG) and Plant Research Centre in the University of Adelaide. This study was funded by the Australian Centre for Plant Functional Genomics (ACPFG), the Grains Research and Development Corporation (GRDC), and Australian Research Council Linkage Grant (LP130101055).
    Publisher
    Wiley
    Journal
    Journal of Plant Nutrition and Soil Science
    DOI
    10.1002/jpln.201500625
    Additional Links
    http://onlinelibrary.wiley.com/doi/10.1002/jpln.201500625/abstract
    https://rss.onlinelibrary.wiley.com/doi/am-pdf/10.1002/jpln.201500625
    ae974a485f413a2113503eed53cd6c53
    10.1002/jpln.201500625
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division; Plant Science Program; Center for Desert Agriculture

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