Nitrate reductase in durum wheat seedlings as affected by nitrate nutrition and salinity

Functional Plant Biology : FPB
Petronia CarilloAmodio Fuggi

Abstract

The combined effects of nitrate (0, 0.1, 1, 10 mm) and salt (0, 100 mm NaCl) on nitrogen metabolism in durum wheat seedlings were investigated by analysis of nitrate reductase (NR) expression and activity, and metabolite content. High salinity (100 mm NaCl) reduced shoot growth more than root growth. The effect was independent of nitrate concentration. NR mRNA was present at a low level in both leaves and roots of plants grown in a nitrogen-free medium. NaCl increased NR mRNA at low nitrate, suggesting that chloride can mimic nitrate as a signal molecule to induce transcription in both roots and leaves. However, the level of NR protein remained low in salt-stressed plants, indicating an inhibitory effect of salt on translation of NR mRNA or an increase in protein degradation. The lower activity of nitrate reductase in leaves of high-nitrate treated plants under salinity suggested a restriction of NO3- transport to the shoot under salinity. Salt treatment promoted photorespiration, inhibiting carbohydrate accumulation in plants grown on low nitrate media. Under salinity free amino acids, in particular proline and asparagine, and glycine betaine could function as osmolytes to balance water potential within the cell, especially wh...Continue Reading

References

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Citations

Dec 24, 2019·Frontiers in Plant Science·Michael James Van OostenPetronia Carillo
Jan 26, 2017·Frontiers in Plant Science·Maria Grazia AnnunziataPetronia Carillo
Mar 15, 2018·Frontiers in Plant Science·Youssef RouphaelStefania De Pascale
Jun 13, 2019·Journal of Experimental Botany·Arun K YadavBarry J Pogson
Feb 20, 2018·Frontiers in Plant Science·Petronia Carillo
Dec 28, 2019·International Journal of Molecular Sciences·Muhammad KamranJen-Tsung Chen
Mar 8, 2020·Plants·Teresa Fuertes-MendizábalMª Begoña González-Moro
Apr 15, 2015·Journal of Integrative Plant Biology·Salima YousfiMaria Dolores Serret
May 16, 2017·Journal of the Science of Food and Agriculture·Nicola LandiAntimo Di Maro
Mar 23, 2019·Frontiers in Plant Science·Maria Grazia AnnunziataPetronia Carillo
Feb 1, 2011·Functional Plant Biology : FPB·Petronia CarilloRonan Sulpice
Jul 1, 2008·Functional Plant Biology : FPB·Petronia CarilloAmodio Fuggi
Jul 24, 2021·The Science of the Total Environment·Hanyou XieZhu Ouyang

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Datasets Mentioned

BETA
AF153448

Methods Mentioned

BETA
X-ray
co-electrophoresis
PCR
salt treatment
salt stress

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