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Multiple Abiotic Stress, Nitrate Availability and the Growth of Wheat by Ge, Y.; Hawkesford, M.J.; Rosolem, C.A.; Mooney, S.J.; Ashton, R.W.; Evans, J.; Whalley, W.R. is a Agricultural and Biological Sciences article available to read on EtoBox.

What is Multiple Abiotic Stress, Nitrate Availability and the Growth of Wheat about?

In the field, wheat experiences a combination of physical and nutrient stresses. There has been a tendency to study root impedance and water stress in separation and less is known about how they might interact. In this study, we investigated the effect of root impedance on the growth of three wheat varieties (Cadenza, Xi19 and Battalion) at different levels of nitrate availability, from 0-20 mM nitrate, in sand culture. This model system allows soil strength to be increased while maintaining adequate water availability. In a separate pot experiment, we grew the same wheat varieties in a loamy sand where soil was allowed to dry sufficiently to both reduce water potential and increase root impedance. This pot experiment also had a range of nitrate availabilities 0-20 mM nitrate. Once the seedlings were established we limited water supply to apply a matric potential of approximately -200 kPa to the roots. Soil drying increased the penetrometer resistance from approximately 300 kPa to more than 1 MPa. There were differences between the two experimental systems; growth was smaller in the soil-based experiment compared to the sand culture. However, the effects of the experimental treatme

Who reads Multiple Abiotic Stress, Nitrate Availability and the Growth of Wheat?

Author

Ge, Y.; Hawkesford, M.J.; Rosolem, C.A.; Mooney, S.J.; Ashton, R.W.; Evans, J.; Whalley, W.R.

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0167-1987)

Published

2019

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)