Post-flowering nitrate uptake in wheat is controlled by N status at flowering, with a putative major role of root nitrate transporter NRT2.1

PloS One
François TaulemesseVincent Allard

Abstract

In bread wheat (Triticum aestivum L.), the simultaneous improvement of both yield and grain protein is difficult because of the strong negative relationship between these two traits. However, some genotypes deviate positively from this relationship and this has been linked to their ability to take up nitrogen (N) during the post-flowering period, regardless of their N status at flowering. The physiological and genetic determinants of post-flowering N uptake relating to N satiety are poorly understood. This study uses semi-hydroponic culture of cv. Récital under controlled conditions to explore these controls. The first objective was to record the effects of contrasting N status at flowering on post-flowering nitrate (NO₃⁻) uptake under non-limiting NO₃⁻ conditions, while following the expression of key genes involved in NO₃⁻ uptake and assimilation. We found that post-flowering NO₃⁻ uptake was strongly influenced by plant N status at flowering during the first 300-400 degree-days after flowering, overlapping with a probable regulation of nitrate uptake exerted by N demand for growth. The uptake of NO₃⁻ correlated well with the expression of the gene TaNRT2.1, coding for a root NO₃⁻ transporter, which seems to play a major role ...Continue Reading

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Citations

Oct 7, 2016·Journal of Experimental Botany·Marien HavéCéline Masclaux-Daubresse
Feb 6, 2017·Journal of Experimental Botany·Xiaorong FanGuohua Xu
Mar 25, 2020·International Journal of Molecular Sciences·Mohammad Rezaul KarimPing Lan
Mar 31, 2018·Plants·Olga S WalshSteven M Blanscet
Jun 11, 2017·Journal of Integrative Plant Biology·Liyu Chen, Hong Liao
Mar 27, 2021·Biochemical Society Transactions·Nick S FradgleyStéphanie M Swarbreck
Aug 28, 2021·International Journal of Molecular Sciences·Mengmeng HouJingguang Chen

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Datasets Mentioned

BETA
AY587264
1
AF332214.1
DQ124212.1

Methods Mentioned

BETA
PCR
dissection

Software Mentioned

R
SigmaPlot

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