Influence of exogenously applied nitric oxide on strawberry (Fragaria × ananassa) plants grown under iron deficiency and/or saline stress

Abstract

A study was carried out to assess the protective effects of exogenously applied nitric oxide (NO) in the form of its donor sodium nitroprusside (SNP) to strawberry seedlings (Fragaria × ananassa cv. Camarosa) grown under iron deficiency (ID), salinity stress or combination of both. The experimental design contained control, 0.1 mM FeSO (ID, Fe deficiency); 50 mM NaCl (S, Salinity) and ID + S. Plants were sprayed with 0.1 mM SNP or 0.1 mM sodium ferrocyanide, an analogue of SNP containing no NO. The deleterious effects of ID + S treatments on plant fresh and dry matters, total chlorophyll and chlorophyll fluorescence were more striking than those caused by the ID or S treatment alone. Furthermore, combination of salinity and iron stress exacerbated electrolyte leakage (EL) and the levels of malondialdehyde (MDA) and hydrogen peroxide (H O ) in plant leaves compared to those in plants grown with either of the single stresses. NO treatment effectively reduced EL, MDA and H O in plants grown under stress conditions applied singly or in combination. Salt stress alone and with ID reduced the superoxide dismutase (EC1.15.1.1) and catalase (EC 1.11.1.6) activities but increased that of POD (EC 1.17.1.7). Exogenously applied NO led to significant changes in antioxidant enzyme activities in either ID or S than those by ID+S. Overall, exogenously applied NO was more effective in mitigating the stress-induced adverse effects on the strawberry plants exposed to a single stress than those due to the combination of both stresses.

Interaction between hydrogen peroxide and sodium nitroprusside following chemical priming of Ocimum basilicum L. against salt stress

“…Current results showed that SNP and H 2 O 2 treatments, alone or in combination, increased leaf FW and DW, and ultimately enhanced plant tolerance to stress condition. Similar results in leaf FW and DW were reported in primed strawberry (Kaya et al ), as well as cotton plants under salt stress (Shallan et al ).…”

Biodiversity within Medicago truncatula genotypes toward response to iron deficiency: Investigation of main tolerance mechanisms

“…In the present study, CAT activity significantly increased in Fe‐deficient plants, but the magnitude of the increase was greater in Fe‐deficient tolerant genotypes (A17 and TN8.20). Our results contrasted with other research, which demonstrated that iron deficiency decreases the activity of CAT (Kaya, Akram, & Achraf, ). In our case, the stimulation of the CAT enzyme observed in both tolerant genotypes could be explained by their ability to absorb and mobilize iron to achieve the necessary metabolic functions or by the use of iron stored in leaves.…”

Integrative roles of nitric oxide and hydrogen sulfide in melatonin‐induced tolerance of pepper (Capsicum annuum L.) plants to iron deficiency and salt stress alone or in combination

“…It has been reported that exogenous 100 µM MT applied to different crops such as Chinese licorice (Afreen et al ), white lupin (Arnao and Hernández‐Ruiz ) and tomato (Martinez et al , Yang et al ) improved tolerance to some abiotic stressors, so this level of MT was used in the present experiments. In our previous research for subjecting strawberry plants to ID, we used 0.1 mM FeSO 4 (Kaya et al ). Furthermore, 100 mM NaCl was also chosen for pepper plants in previous studies to create salinity stress (Özdemir et al , Yildiztekin et al ), and so the same concentrations were used in the present experiment for ID and salinity stress.…”