A profiling approach of the natural variability of foliar N remobilization at the rosette stage gives clues to understand the limiting processes involved in the low N use efficiency of winter oilseed rape

Journal of Experimental Botany
Alexandra GirondéJean-Christophe Avice

Abstract

Oilseed rape, a crop requiring a high level of nitogen (N) fertilizers, is characterized by low N use efficiency. To identify the limiting factors involved in the N use efficiency of winter oilseed rape, the response to low N supply was investigated at the vegetative stage in 10 genotypes by using long-term pulse-chase (15)N labelling and studying the physiological processes of leaf N remobilization. Analysis of growth and components of N use efficiency allowed four profiles to be defined. Group 1 was characterized by an efficient N remobilization under low and high N conditions but by a decrease of leaf growth under N limitation. Group 2 showed a decrease in leaf growth under low N supply that was associated with a low N remobilization efficiency under both N supplies despite a high remobilization of soluble proteins. In response to N limitation, Group 3 is characterized by an increase in N use efficiency and leaf N remobilization compared with high N that is not sufficient to sustain the leaf biomass production at a similar level to non-limited plants. Genotypes of Group 4 subjected to low nitrate were able to maintain leaf growth to the same level as under high N. The profiling approach indicated that enhancement of amino ac...Continue Reading

References

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Jan 17, 2012·Physiologia Plantarum·Irma N RobertsChristiane Funk
May 3, 2014·Journal of Experimental Botany·Jean-Christophe Avice, Philippe Etienne

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Citations

Mar 20, 2016·Plant Science : an International Journal of Experimental Plant Biology·Marine PoretJean-Christophe Avice
Jul 4, 2017·Plant Methods·Maja MusseFrançois Mariette
Jun 24, 2017·Frontiers in Plant Science·Shah SaudHesham Alharby
Jan 29, 2019·Frontiers in Plant Science·Maxence JamesJacques Trouverie

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