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Role of nitric oxide under saline stress: implications on proline metabolism

  • Brief Communication
  • Published:
Biologia Plantarum

Abstract

The present work is focused on the possible relationship between nitric oxide and the induction of proline in response to salt stress. The plants were subjected to 100 mM NaCl and sodium nitroprusside (SNP; the donor of NO) at different concentrations. The plants showed lower NaCl-induced oxidative stress and proline accumulation after application of low concentrations of SNP together with the NaCl treatment. The reduction in the proline content was related to increased activity of proline dehydrogenase. These results suggest that the NO could be capable of mitigating damage associated with salt stress.

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Abbreviations

BSA:

bovine serum albumin

DM:

dry matter

FM:

fresh matter

GSA:

glutamic-γ-semialdehyde

H2O2 :

hydrogen peroxide

LOX:

lipoxygenase

MDA:

malondialdehyde

NO:

nitric oxide

δ-OAT:

ornithine-δ-aminotransferase

P5C:

Δ1-pyrroline 5-carboxylate

P5CDH:

pyrroline-5-carboxylate dehydrogenase

P5CR:

Δ1-pyrroline-5-carboxylate reductase

P5CS:

Δ1-pyrroline-5-carboxilate synthetase

PDH:

proline dehydrogenase

PMSF:

phenylmethylsulfonyl fluoride

PPFD:

photosynthetic photon flux density

RGRL :

leaf relative growth rate

ROS:

reactive oxygen species

SNP:

sodium nitroprusside

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Authors and Affiliations

  1. Department of Plant Physiology, Faculty of Sciences, University of Granada, E-18071, Granada, Spain

    A. I. López-Carrión, R. Castellano, M. A. Rosales, J. M. Ruiz & L. Romero

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  1. A. I. López-Carrión
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  2. R. Castellano
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  3. M. A. Rosales
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  4. J. M. Ruiz
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  5. L. Romero
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Correspondence to L. Romero.

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López-Carrión, A.I., Castellano, R., Rosales, M.A. et al. Role of nitric oxide under saline stress: implications on proline metabolism. Biol Plant 52, 587–591 (2008). https://doi.org/10.1007/s10535-008-0117-1

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  • DOI: https://doi.org/10.1007/s10535-008-0117-1

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