scholarly journals Salt-Induced Changes in Antioxidative Enzyme Activities in Shoot Tissues of Two Atriplex Varieties

2013 ◽  
Vol 41 (1) ◽  
pp. 115 ◽  
Author(s):  
Salma SAI KACHOUT ◽  
Khaoula JAFFEL HAMZA ◽  
Najoua KARRAY BOURAOUI ◽  
Jean Claude LECLERC ◽  
Zeineb OUERGHI
Keyword(s):  
Oxidative Stress ◽  
Salt Stress ◽  
Antioxidant Enzyme ◽  
Culture Medium ◽  
General Increase ◽  
Tissue Concentrations ◽  
Starting Point ◽  
Antioxidative Enzyme Activities ◽  
Induced Changes

  This study examined the influence of salt levels on antioxidant activity and content of carotenoids and anthocyanins of the A. hortensis leaves using two varieties: green orach (var. purpurea ) and red orach (var. rubra). Seeds of Atriplex were exposed to 0, 90, 180 and 260 mM NaCl for 3 months and seeds were sown in an earthen pot. Overall levels of ascorbate peroxidase (APX) and glutathione reductase (GR) activity were significantly elevated. Salt stress caused a significant decline in tissue concentrations of catalase (CAT) and superoxide dismutase (SOD). However, 90 mM NaCl did not modify these parameters, which remains similar to control values. Activities of APX and CAT were increase whether the shoots of A. hortensis var. purpurea were grown in the presence of 180 mM NaCl. Thus although some indications of oxidative stress accompany exposure of this salt-tolerant Atriplex varieties to salinity, mechanisms appear to exist within its shoot tissue to permit the tolerance of such oxidative stress. High salt concentration in the culture medium provokes oxidative damage in Atriplex leaves and induces a general increase in antioxidant enzyme activity. In particular, NaCl toxicity decreased content of carotenoids. It also decreased the concentration of anthocyanin pigments in leaves of Atriplex. This work therefore provides a starting point towards a better understanding of the role of antioxidant enzyme in the plant response against salt stress.

scholarly journals Salt Stress Induces Non-CG Methylation in Coding Regions of Barley Seedlings (Hordeum vulgare)

2018 ◽  
Author(s):  
Moumouni Konaté ◽  
Michael J. Wilkinson ◽  
Benjamin T. Mayne ◽  
Stephen M. Pederson ◽  
Eileen S. Scott ◽  
...  
Keyword(s):  
Gene Expression ◽  
Dna Methylation ◽  
Salt Stress ◽  
Growth And Yield ◽  
Plant Responses ◽  
Global Methylation ◽  
Repeat Elements ◽  
Starting Point ◽  
Induced Changes

Salinity can negatively impact crop growth and yield. Changes in DNA methylation are known to occur when plants are challenged by stress and have been associated with the regulation of stress-response genes. However, the role of DNA-methylation in moderating gene expression in response to salt stress has been relatively poorly studied among crops such as barley. Here, we assessed the extent of salt-induced alterations of DNA methylation in barley and their putative role in perturbed gene expression. Using Next Generation Sequencing, we screened the leaf and root methylomes of five divergent barley varieties grown under control and three salt concentrations, to seek genotype independent salt-induced changes in DNA methylation. Salt stress caused increased methylation in leaves but diminished methylation in roots with a higher number of changes in leaves than in roots, indicating that salt induced changes to global methylation are organ specific. Differentially Methylated Markers (DMMs) were mostly located in close proximity to repeat elements, but also in 1094 genes, of which many possessed gene ontology (GO) terms associated with plant responses to stress. Identified markers have potential value as sentinels of salt stress and provide a starting point to allow understanding of the functional role of DNA methylation in facilitating barley’s response to this stressor.

scholarly journals Genome-wide identification of the GATA transcription factor family and their expression patterns under temperature and salt stress in Aspergillus oryzae

AMB Express ◽  
2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Chunmiao Jiang ◽  
Gongbo Lv ◽  
Jinxin Ge ◽  
Bin He ◽  
Zhe Zhang ◽  
...  
Keyword(s):  
Salt Stress ◽  
Expression Patterns ◽  
Interaction Network ◽  
Protein Protein Interaction ◽  
Genome Wide ◽  
Gata Transcription Factor ◽  
Starting Point ◽  
Evolutionary Features ◽  
First Time

AbstractGATA transcription factors (TFs) are involved in the regulation of growth processes and various environmental stresses. Although GATA TFs involved in abiotic stress in plants and some fungi have been analyzed, information regarding GATA TFs in Aspergillusoryzae is extremely poor. In this study, we identified and functionally characterized seven GATA proteins from A.oryzae 3.042 genome, including a novel AoSnf5 GATA TF with 20-residue between the Cys-X2-Cys motifs which was found in Aspergillus GATA TFs for the first time. Phylogenetic analysis indicated that these seven A. oryzae GATA TFs could be classified into six subgroups. Analysis of conserved motifs demonstrated that Aspergillus GATA TFs with similar motif compositions clustered in one subgroup, suggesting that they might possess similar genetic functions, further confirming the accuracy of the phylogenetic relationship. Furthermore, the expression patterns of seven A.oryzae GATA TFs under temperature and salt stresses indicated that A. oryzae GATA TFs were mainly responsive to high temperature and high salt stress. The protein–protein interaction network of A.oryzae GATA TFs revealed certain potentially interacting proteins. The comprehensive analysis of A. oryzae GATA TFs will be beneficial for understanding their biological function and evolutionary features and provide an important starting point to further understand the role of GATA TFs in the regulation of distinct environmental conditions in A.oryzae.

Role of Oxidative Stress in Ischemia–Reperfusion-Induced Changes in Na+,K+-ATPase Isoform Expression in Rat Heart

2004 ◽  
Vol 6 (5) ◽  
pp. 914-923 ◽  
Author(s):  
Petr Ostadal ◽  
Adel B. Elmoselhi ◽  
Irena Zdobnicka ◽  
Anton Lukas ◽  
Vijayan Elimban ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Rat Heart ◽  
Ischemia Reperfusion ◽  
Isoform Expression ◽  
Induced Changes

Role of Oxidative Stress in Ischemia–Reperfusion-Induced Changes in Na+,K+-ATPase Isoform Expression in Rat Heart

2004 ◽  
Vol 6 (5) ◽  
pp. 914-923 ◽  
Author(s):  
Petr Ostadal ◽  
Adel B. Elmoselhi ◽  
Irena Zdobnicka ◽  
Anton Lukas ◽  
Vijayan Elimban ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Rat Heart ◽  
Ischemia Reperfusion ◽  
Isoform Expression ◽  
Induced Changes

Role of Oxidative Stress in Catecholamine-Induced Changes in Cardiac Sarcolemmal Ca2+ Transport

2001 ◽  
Vol 387 (1) ◽  
pp. 85-92 ◽  
Author(s):  
Paramjit S. Tappia ◽  
Tomoji Hata ◽  
Lena Hozaima ◽  
Manjot S. Sandhu ◽  
Vincenzo Panagia ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Induced Changes

scholarly journals Role of Silicon in Mediating Salt Tolerance in Plants: A Review

Plants ◽  
2019 ◽  
Vol 8 (6) ◽  
pp. 147 ◽  
Author(s):  
Yong-Xing Zhu ◽  
Hai-Jun Gong ◽  
Jun-Liang Yin
Keyword(s):  
Oxidative Stress ◽  
Salt Stress ◽  
Osmotic Stress ◽  
Stress Responses ◽  
Polyamine Metabolism ◽  
Research Areas ◽  
Aquaporin Gene ◽  
Ion Imbalance ◽  
The Impact

Salt stress is a major threat for plant growth worldwide. The regulatory mechanisms of silicon in alleviating salt stress have been widely studied using physiological, molecular genetics, and genomic approaches. Recently, progresses have been made in elucidating the alleviative effects of silicon in salt-induced osmotic stress, Na toxicity, and oxidative stress. In this review, we highlight recent development on the impact of silicon application on salt stress responses. Emphasis will be given to the following aspects. (1) Silicon transporters have been experimentally identified in different plant species and their structure feature could be an important molecular basis for silicon permeability. (2) Silicon could mediate salt-induced ion imbalance by (i) regulating Na+ uptake, transport, and distribution and (ii) regulating polyamine levels. (3) Si-mediated upregulation of aquaporin gene expression and osmotic adjustment play important roles in alleviating salinity-induced osmotic stress. (4) Silicon application direct/indirectly mitigates oxidative stress via regulating the antioxidant defense and polyamine metabolism. (5) Omics studies reveal that silicon could regulate plants’ response to salt stress by modulating the expression of various genes including transcription factors and hormone-related genes. Finally, research areas that require further investigation to provide a deeper understanding of the role of silicon in plants are highlighted.

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