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

López-Carrión, A. I.; Castellano, Rosa; Rosales, Miguel A.; Ruiz, Juan M.; Romero, Luís

doi:10.1007/s10535-008-0117-1

Cited by 113 publications

(54 citation statements)

References 31 publications

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“…However, application of NO caused a slight increase in accumulation of glycinebetaine in the wheat plants. In contrast to our results, however, a NO-induced decrease in proline accumulation was also observed in tobacco (Lopez-Carrion et al, 2008).…”

Section: Discussioncontrasting

confidence: 99%

Protective role of foliar-applied nitric oxide in Triticum aestivum under saline stress

Kausar¹,

Shahbaz²,

Ashraf³

2013

Turk J Bot

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A study was conducted to assess whether foliar-applied nitric oxide (NO) could alleviate the adverse effects of salt stress on wheat (Triticum aestivum L.). Four sodium nitroprusside levels (control [water spray] and 0.05, 0.10, and 0.15 mM) were sprayed as a donor of NO on the leaves of cultivar S-24 plants grown under nonsaline and saline conditions (150 mM NaCl). Data for growth and yield, chlorophyll contents, activities of antioxidants, and concentrations of mineral nutrients were recorded. Root-medium salinity adversely affected shoot and root dry weight, shoot length, and yield attributes of the wheat plants while it enhanced the activities of antioxidants, proline accumulation, and concentrations of shoot and root Na + and Cl -. Foliar-applied NO improved growth of only nonstressed plants. Exogenously applied NO enhanced the activities of antioxidant enzymes (superoxide dismutase [SOD], peroxidase [POD], and catalase [CAT]) and levels of soluble proteins and proline, in both stressed and nonstressed wheat plants. Overall, exogenous application of NO enhanced chlorophyll contents; activities of CAT, POD, and SOD; and levels of soluble proteins and total free proline in the salt stressed wheat plants. The exogenous application of NO had a protective role against salt-induced oxidative damage by enhancing the activities of antioxidant enzymes, thereby improving plant growth under saline stress.

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Section: Discussioncontrasting

confidence: 99%

Protective role of foliar-applied nitric oxide in Triticum aestivum under saline stress

Kausar¹,

Shahbaz²,

Ashraf³

2013

Turk J Bot

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“…The Pro content in DETA/NO-treated plants was several times higher than that in the other treatments both after 3 days stress and during recovery. Similarly to the present findings, NO affected Pro concentration during salt stress in cabbage (López-Carrion et al, 2008). The NO-induced Pro accumulation was a result of enhanced Pro synthesis and decreased degradation in maize (Yang and Gong, 2009).…”

Section: Gene Expression Studiessupporting

confidence: 85%

Nitric oxide affects salt-induced changes in free amino acid levels in maize

Boldizsár¹,

Simon‐Sarkadi²,

Szirtes³

et al. 2013

Journal of Plant Physiology

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Abstract:It was assumed that salt-induced redox changes affect amino acid metabolism in maize (Zea mays L.), and this influence may be modified by NO. The applied NaCl treatment reduced the fresh weight of shoots and roots. This decrease was smaller after the combined application of NaCl and an NO-donorETA/NO) in the shoots, while it was greater after simultaneous treatment with NaCl and nitro-l-arginine (l-NNA, inhibitor of NO synthesis) in the roots. The quantum yield efficiency of photosystem II was not influenced by the treatments. NaCl had a significant effect on the redox environment in the leaves as it was shown by the increase in the amount of glutathione disulphide and in the redox potential of the glutathione/glutathione disulphide redox pair. This influence of NaCl was modified by DETA/NO and l-NNA. Pharmacological modification of NO levels affected salt-induced changes in both the total free amino acid content and in the free amino acid composition. NaCl alone increased the concentration of almost all amino acids which effect was strengthened by DETA/NO in the case of Pro. l-NNA treatment resulted in a significant increase in the Ala, Val, Gly and Tyr contents. The Ile, Lys and Val concentrations rose considerably after the combined application of NaCl and DETA/NO compared to NaCl treatment alone in the recovery phase. NaCl also increased the expression of several genes related to the amino acid and antioxidant metabolism, and this effect was modified by DETA/NO. In conclusion, modification of NO levels affected salt-induced, glutathione-dependent redox changes and simultaneously the free amino acid composition and the level of several free amino acids. The observed much higher Pro content in plants treated with both NaCl and DETA/NO during recovery may contribute to the protective effect of NO against salt stress.

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“…In the green alga Chlamydomonas reinhardtii, NO treatment enhanced the copper-induced proline accumulation and increased the expression of P5CS (Zhang et al 2008). By contrast, the increase of proline levels in Brassica rapa plants under high salinity conditions was less pronounced when plants were simultaneously treated with NO, possibly due to less efficient reduction of PDH activity (López-Carrión et al 2008). In Arabidopsis, NO donors stimulated P5CS1 expression and repressed PDH1 expression, while NO scavengers had inverse effects (Zhao et al 2009).…”

Section: Hormonesmentioning

confidence: 99%

Proline metabolism and transport in plant development

et al. 2010

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Proline fulfils diverse functions in plants. As amino acid it is a structural component of proteins, but it also plays a role as compatible solute under environmental stress conditions. Proline metabolism involves several subcellular compartments and contributes to the redox balance of the cell. Proline synthesis has been associated with tissues undergoing rapid cell divisions, such as shoot apical meristems, and appears to be involved in floral transition and embryo development. High levels of proline can be found in pollen and seeds, where it serves as compatible solute, protecting cellular structures during dehydration. The proline concentrations of cells, tissues and plant organs are regulated by the interplay of biosynthesis, degradation and intra-as well as intercellular transport processes. Among the proline transport proteins characterized so far, both general amino acid permeases and selective compatible solute transporters were identified, reflecting the versatile role of proline under stress and non-stress situations. The review summarizes our current knowledge on proline metabolism and transport in view of plant development, discussing regulatory aspects such as the influence of metabolites and hormones. Additional information from animals, fungi and bacteria is included, showing similarities and differences to proline metabolism and transport in plants.

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

Cited by 113 publications

References 31 publications

Protective role of foliar-applied nitric oxide in Triticum aestivum under saline stress

Protective role of foliar-applied nitric oxide in Triticum aestivum under saline stress

Nitric oxide affects salt-induced changes in free amino acid levels in maize

Proline metabolism and transport in plant development

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