Nitrogen metabolism in durum wheat under salinity: accumulation of proline and glycine betaine

Functional Plant Biology : FPB
Petronia CarilloAmodio Fuggi

Abstract

We studied the effect of salinity on amino acid, proline and glycine betaine accumulation in leaves of different stages of development in durum wheat under high and low nitrogen supply. Our results suggest that protective compounds against salt stress are accumulated in all leaves. The major metabolites are glycine betaine, which preferentially accumulates in younger tissues, and proline, which is found predominantly in older tissues. Proline tended to accumulate early, at the onset of the stress, while glycine betaine accumulation was observed during prolonged stress. Nitrate reductase (NR) and glutamate synthase (GOGAT) are positively correlated with these compatible solutes: proline is associated with NR in the oldest leaves of high-nitrate plants and glycine betaine is associated with GOGAT in the youngest leaves of both low- and high-nitrate plants. In high-nitrate conditions proline accounts for more than 39% of the osmotic adjustment in the cytoplasmic compartments of old leaves. Its nitrogen-dependent accumulation may offer an important advantage in that it can be metabolised to allow reallocation of energy, carbon and nitrogen from the older leaves to the younger tissues. The contribution of glycine betaine is higher i...Continue Reading

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May 1, 2005·Functional Plant Biology : FPB·Petronia CarilloAmodio Fuggi

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Citations

Apr 15, 2015·Journal of Integrative Plant Biology·Salima YousfiMaria Dolores Serret
May 21, 2015·AoB Plants·Payal SanadhyaPradeep K Agarwal
Jan 26, 2017·Frontiers in Plant Science·Maria Grazia AnnunziataPetronia Carillo
Feb 20, 2018·Frontiers in Plant Science·Petronia Carillo
Feb 1, 2011·Functional Plant Biology : FPB·Petronia CarilloRonan Sulpice
Nov 26, 2010·Molecular Biology Reports·Pasqualina WoodrowPetronia Carillo
Mar 15, 2018·Frontiers in Plant Science·Youssef RouphaelStefania De Pascale
Mar 23, 2019·Frontiers in Plant Science·Maria Grazia AnnunziataPetronia Carillo
Sep 28, 2018·Environmental Science and Pollution Research International·Erna Karalija, Alisa Selović
Dec 7, 2020·Physiologia Plantarum·Munir OzturkMirza Hasanuzzaman
Feb 14, 2021·Biology·Valerio CirilloAlbino Maggio
May 25, 2021·Journal of Ginseng Research·Jong-Pyo KangDeok-Chun Yang
Jun 30, 2021·Plant Physiology and Biochemistry : PPB·Weichao WangKadambot H M Siddique
Mar 5, 2019·Journal of Agricultural and Food Chemistry·Sergio SaiaRomina Beleggia

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