Antioxidant Enzyme Activities as a Tool to Discriminate Ecotypes of Crithmum maritimum L. Differing in Their Capacity to Withstand Salinity

Hamed, Karim Ben; Magné, Christian; Abdelly, Chédly

doi:10.5772/31563

Cited by 5 publications

(2 citation statements)

References 50 publications

(54 reference statements)

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“…Similar results were reported in other halophytes like Crithmum maritimum (Ben Hamed et al 2007), Cakile maritima (Ben Amor et al 2006) and Mesembryanthemum crystallinum (Shevyakova et al 2006). POD enzymes protect cells against harmful concentrations of hydroperoxides and may also play a role in the oxidation of phenolic metabolites in leaves under NaCl stress (Ben Hamed et al 2012).…”

Section: Discussionsupporting

confidence: 72%

Growth, sodium uptake and antioxidant responses of coastal plants differing in their ecological status under increasing salinity

et al. 2013

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In the present study, we compared the response to salinity of three plants from Brittany coast with contrasted ecological status: Limonium latifolium (salt marshes), Matricaria maritima (beach tops and sand dunes) and Crambe maritima (fixed dunes). Under controlled glasshouse conditions, the growth of the three plants decreased with increasing external salinity. L. latifolium and C. maritima exhibited the highest and lowest resistance to severe salt stress (400 mM), respectively. M. maritima could be considered as an intermediate species, since it tolerated salinity up to 200 mM. The same observation could be made with sodium absorption and acuumulation in plant tissues, the most tolerant species (L. latifolium being the least Na accumulator. Hydrogen peroxide (H2O2) and malondialdehyde (MDA), commonly produced in conditions of stress, accumulated significantly in salt treated C. maritima and M. maritima while not in the tolerant L. latifolium. The latter used glutathione reductase to maintain constant H2O2 levels under salt stress while peroxidases were very low and ascorbate peroxidase did not respond to salinity stimulation. The medium tolerant halophyte M. maritima used peroxidases to protect from NaCl-induced H2O2, while the sensitive C. maritima failed to detoxify H2O2 despite a sharp increase in catalase activity. Results showed that the three coastal species differ in resistance to salinity. They also suggested that the level of plant resistance to salinity could be attributed to differing mechanisms to manage the accumulation of sodium and cope with the oxidative damages.

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Section: Discussionsupporting

confidence: 72%

Growth, sodium uptake and antioxidant responses of coastal plants differing in their ecological status under increasing salinity

et al. 2013

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“…Meanwhile, many reports show that APX activity is increased by salt treatment (Oidaira et al, 2000). The results of APX enzyme activity did not change under saline conditions in this experiment, similar to the previous studies Karim et al (2012) and Sanoubar et al (2020). According to Mittova et al (2004), the increase in APX enzyme activity is associated with higher levels of H 2 O 2 production in the cell.…”

Section: Effects Of Tio 2 Nanoparticles On Biochemical Parameters Of ...supporting

confidence: 87%

Effects of Titanium Dioxide nanoparticles on salinity tolerance of rice (Oryza sativa L.) at the seedling stage

Pham,

Danh,

2023

CTU J. of Inn. & Sus. Dev.

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This study aimed to evaluate the effects of titanium dioxide nanoparticles on the salinity tolerance of rice. The effects of five nano titanium dioxide concentrations (0 mg/L, 25 mg/L, 50 mg/L, 75 mg/L, and 100 mg/L) on the physiological and biochemical parameters of rice were evaluated. The results showed that among three rice varieties (ST24, ST25, OM18), only ST25 grew in a better manner with the application of TiO2 nanoparticles and the optimal concentration of TiO2 nanoparticles was 50 mg/mL. It increased the shoot height by 20.07% and the survival rate of rice compared to the control. These growth-promoting effects were simultaneous with increased levels of chlorophyll, carotenoid and proline. The activities of antioxidant enzymes were improved. While activities of enzymes catalase and peroxidase increased significantly, no change in the activities of ascorbate peroxidase was observed. Finding of this study showed that titanium dioxide nanoparticles increased the salinity tolerance of rice by promoting the photosynthetic and anti-oxidative processes in rice seedlings.

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Cerium oxide as a nanozyme for plant abiotic stress tolerance: An overview of the mechanisms

Preetha,

Sriram,

Premasudha

et al. 2023

Plant Nano Biology

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Antioxidant Enzyme Activities as a Tool to Discriminate Ecotypes of Crithmum maritimum L. Differing in Their Capacity to Withstand Salinity

Cited by 5 publications

References 50 publications

Growth, sodium uptake and antioxidant responses of coastal plants differing in their ecological status under increasing salinity

Growth, sodium uptake and antioxidant responses of coastal plants differing in their ecological status under increasing salinity

Effects of Titanium Dioxide nanoparticles on salinity tolerance of rice (Oryza sativa L.) at the seedling stage

Cerium oxide as a nanozyme for plant abiotic stress tolerance: An overview of the mechanisms

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