Involvement of phosphoenolpyruvate carboxylase and antioxydants enzymes in nitrogen nutrition tolerance in Sorghum bicolor plants

Omari, Redouane El; Mrid, Reda Ben; Chibi, Fatiha; Nhiri, Mohamed

doi:10.1134/s102144371606008x

Cited by 18 publications

(12 citation statements)

References 26 publications

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“…Sorghum seedlings accumulated high proline content under NaCl stress ( Figure 3 A). Although at different stages, these results are supported by other studies, which reported similar effects in sorghum [ 29 , 51 , 52 ] and other crops [ 53 ]. A high concentration of Ca 2+ (15 and 35 mM) significantly increased proline content in control seedlings ( Figure 3 B), whereas in NaCl treated seedlings, there were no significant changes ( Figure 3 C).…”

Section: Discussionsupporting

confidence: 88%

“…Hence, it is possible to take advantage of these characteristics and study the mechanisms of salt tolerance in order to develop ways to mitigate salt stress in cereals. Although some studies reported aspects of salt tolerance mechanisms in sorghum [ 28 , 29 ], to date, the effect of high salt on the germination and the role of exogenous Ca 2+ to induce increased salt stress tolerance in sorghum have remained elusive.…”

Section: Introductionmentioning

confidence: 99%

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Calcium Improves Germination and Growth of Sorghum bicolor Seedlings under Salt Stress

Mulaudzi

Hendricks

Mabiya

et al. 2020

Plants

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Salinity is a major constraint limiting plant growth and productivity worldwide. Thus, understanding the mechanism underlying plant stress response is of importance to developing new approaches that will increase salt tolerance in crops. This study reports the effects of salt stress on Sorghum bicolor during germination and the role of calcium (Ca2+) to ameliorate some of the effects of salt. To this end, sorghum seeds were germinated in the presence and absence of different NaCl (200 and 300 mM) and Ca2+ (5, 15, or 35 mM) concentrations. Salt stress delayed germination, reduced growth, increased proline, and hydrogen peroxide (H2O2) contents. Salt also induced the expression of key antioxidant (ascorbate peroxidase and catalase) and the Salt Overlay Sensitive1 genes, whereas in the presence of Ca2+ their expression was reduced except for the vacuolar Na+/H+ exchanger antiporter2 gene, which increased by 65-fold compared to the control. Ca2+ reversed the salt-induced delayed germination and promoted seedling growth, which was concomitant with reduced H2O2 and Na+/K+ ratio, indicating a protective effect. Ca2+ also effectively protected the sorghum epidermis and xylem layers from severe damage caused by salt stress. Taken together, our findings suggest that sorghum on its own responds to high salt stress through modulation of osmoprotectants and regulation of stress-responsive genes. Finally, 5 mM exogenously applied Ca2+ was most effective in enhancing salt stress tolerance by counteracting oxidative stress and improving Na+/K+ ratio, which in turn improved germination efficiency and root growth in seedlings stressed by high NaCl.

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Section: Discussionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Calcium Improves Germination and Growth of Sorghum bicolor Seedlings under Salt Stress

Mulaudzi

Hendricks

Mabiya

et al. 2020

Plants

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“…Moreover, the seaweed extracts at the concentrations of 25% and 50%, which were able to induce an increase in plant growth, were probably responsible for alleviating the stressful factors and explain therefore the decrease in the SOD activity at these concentrations. The obtained result is in line with the works conducted on the effect of seaweed extracts as biostimulants and their ability to improve nutrient uptake [50]. Our data reveal that in leaves of wheat, the GR activity was enhanced at the concentration of 25% of URE and reach 24.3 nmol.…”

Section: Effect Of Ure On Plant Growth and Oxidative Stress Metabolism Of Wheat Plantssupporting

confidence: 91%

The effect of foliar application of Ulva rigida extract on the growth and biochemical parameters of wheat plants

Latique

Mrid

Kabach³

et al. 2021

E3S Web Conf.

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Many research studies have shown the importance of seaweed extract in agriculture. Marine macroalgae are rich in diverse compounds like lipids, proteins, carbohydrates, phytohormones, amino acids, osmoprotectants and minerals. In this study, we have tried to characterize Moroccan macroalgae species Ulva rigida collected from the coastal area of Akhfenir in order to evaluate their potential to improve growth plant. The proximate composition, mineral element (Ca, K, Mg, Na and Cl), pigments, amino acid, proteins, lipids, polyphenol contents were determined in liquid extract obtained from green seaweed (SWE) Ulva rigida. Results show that the application of SWE at different concentrations (0,12.5, 25, 50%) significantly enhanced growth parameters, especially with 25% of seaweed liquid extract. Therefore, algal treatment by foliar application is proved to be an effective technique to improve the growth of wheat plants. This study provides important information on the characterization, identification and utilization of seaweed resources for agriculture as biostimulants.

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“…The GSH is used in several redox reactions, among them, those responsible for the amino acid transport, and protein and DNA synthesis [53,54]. High ratio of GSH/GSSG was also reported to be required for accelerating the H 2 O 2 scavenging pathway, especially when the plants are facing stressful conditions [55,56]. The increase in plant height and fresh weight at the 12.5% concentration of seaweed could explain the high level of GR enzyme at this condition, to allow synthesis of high levels of GSH required for the metabolic pathways implicated in biomass production, and also to cope with the eventual stressful conditions faced by wheat plants.…”

Section: Glutathione Reductase (Gr)mentioning

confidence: 99%

Foliar Application of Ulva rigida Water Extracts Improves Salinity Tolerance in Wheat (Triticum durum L.)

et al. 2021

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This study investigated the effect of seaweed extract (SWE) sprays obtained from Ulva rigida on wheat plants (Triticum durum L., variety Karim) grown under salt stress conditions for six weeks. Three levels of NaCl (0, 34.22, 68.44 mM) and four different concentrations (0, 12.5, 25 and 50%) of Ulva rigida as a water extract were applied. The obtained results indicated that seaweed treated plants showed higher ability to tolerate salt stress (34.22 or 68.44 mM of NaCl) by a significant (p < 0.05) increase of plant growth and the photosynthetic pigment contents, compared to those of control (non-treated plants). Furthermore, there was a significant improvement in antioxidant enzyme activity, such as superoxide dismutase (SOD), isocitrate dehydrogenase (ICDH), glutathione peroxidase (GPx), glutathione reductase (GR) activities in the stressed plants, especially in those treated with 12.5% of SWE. Overall, our results suggest that the application of the Ulva rigida water extract could be used as a promising plant growth biostimulant for treating wheat plants under salinity stress.

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Involvement of phosphoenolpyruvate carboxylase and antioxydants enzymes in nitrogen nutrition tolerance in Sorghum bicolor plants

Cited by 18 publications

References 26 publications

Calcium Improves Germination and Growth of Sorghum bicolor Seedlings under Salt Stress

Calcium Improves Germination and Growth of Sorghum bicolor Seedlings under Salt Stress

The effect of foliar application of Ulva rigida extract on the growth and biochemical parameters of wheat plants

Foliar Application of Ulva rigida Water Extracts Improves Salinity Tolerance in Wheat (Triticum durum L.)

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