Abstract
A technique was developed to determine the physiological activity of defined sections of seminal roots of wheat grown in sand. Wheat plants were grown for 2 weeks in narrow columns of N-deficient sand to which all other nutrients had been added. The columns were split longitudinally and 15N-labelled nitrate, in an agar medium, supplied to 2 cm sections of root. Shoots and roots were analysed after 24 h to determine the uptake of 15N. Three sections were examined on either the secondary or tertiary seminal root: 1 cm from the seed (basal segment), 35 cm from the seed (middle segment) and 4 cm from the root apex (apical segment). Total uptake was greatest from the basal and middle segments, declining by 50% from the apical segment. However, uptake per unit root length, including exposed sections of lateral roots, was not significantly different along the root.
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© 1993 Springer Science+Business Media Dordrecht
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Brady, D.J., Gregory, P.J., Fillery, I.R.P. (1993). The Contribution of different regions of the seminal roots of wheat to uptake of nitrate from soil. In: Barrow, N.J. (eds) Plant Nutrition — from Genetic Engineering to Field Practice. Developments in Plant and Soil Sciences, vol 54. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-1880-4_29
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DOI: https://doi.org/10.1007/978-94-011-1880-4_29
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-4832-3
Online ISBN: 978-94-011-1880-4
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