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Your search keyword '"Mohammad Kazem Bahrami"' showing total 3 results
Start Over Author "Mohammad Kazem Bahrami" Topic salinity
3 results on '"Mohammad Kazem Bahrami"'

1. Exogenous melatonin increases salt tolerance in bitter melon by regulating ionic balance, antioxidant system and secondary metabolism-related genes

Author

Morteza Sheikhalipour, Seyed Abolghasem Mohammadi, Behrooz Esmaielpour, Elnaz Zareei, Muhittin Kulak, Sajid Ali, Mojtaba Nouraein, Mohammad Kazem Bahrami, Gholamreza Gohari, and Vasileios Fotopoulos

Subjects
Momordica charantia L., Abiotic stress, Salinity, Defense transcripts, Botany, QK1-989
Abstract

Abstract Background Melatonin is a multi-functional molecule widely employed in order to mitigate abiotic stress factors, in general and salt stress in particular. Even though previous reports revealed that melatonin could exhibit roles in promoting seed germination and protecting plants during various developmental stages of several plant species under salt stress, no reports are available with respect to the regulatory acts of melatonin on the physiological and biochemical status as well as the expression levels of defense- and secondary metabolism-related related transcripts in bitter melon subjected to the salt stress. Results Herewith the present study, we performed a comprehensive analysis of the physiological and ion balance, antioxidant system, as well as transcript analysis of defense-related genes (WRKY1, SOS1, PM H + -ATPase, SKOR, Mc5PTase7, and SOAR1) and secondary metabolism-related gene expression (MAP30, α-MMC, polypeptide-P, and PAL) in salt-stressed bitter melon (Momordica charantia L.) plants in response to melatonin treatment. In this regard, different levels of melatonin (0, 75 and 150 µM) were applied to mitigate salinity stress (0, 50 and 100 mM NaCl) in bitter melon. Accordingly, present findings revealed that 100 mM salinity stress decreased growth and photosynthesis parameters (SPAD, Fv/Fo, Y(II)), RWC, and some nutrient elements (K+, Ca2+, and P), while it increased Y(NO), Y(NPQ), proline, Na+, Cl−, H2O2, MDA, antioxidant enzyme activity, and lead to the induction of the examined genes. However, prsiming with 150 µM melatonin increased SPAD, Fv/Fo, Y(II)), RWC, and K+, Ca2+, and P concentration while decreased Y(NO), Y(NPQ), Na+, Cl−, H2O2, and MDA under salt stress. In addition, the antioxidant system and gene expression levels were increased by melatonin (150 µM). Conclusions Overall, it can be postulated that the application of melatonin (150 µM) has effective roles in alleviating the adverse impacts of salinity through critical modifications in plant metabolism.

Published
2022
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2. Putrescine-functionalized carbon quantum dot (put-CQD) nanoparticles effectively prime grapevine (Vitis vinifera cv. ‘Sultana’) against salt stress

Author

Sima Panahirad, Ali Akbari, Seyed Morteza Zahedi, Elnaz Zareei, Vasileios Fotopoulos, Mohammad Kazem Bahrami, Mostafa Sadeghi, and Gholamreza Gohari

Subjects
0106 biological sciences, 0301 basic medicine, Antioxidant, Proline, medicine.medical_treatment, Plant Science, Biology, Photosynthesis, Salt Stress, 01 natural sciences, Antioxidants, Carbon quantum dots, 03 medical and health sciences, chemistry.chemical_compound, Phenols, lcsh:Botany, Quantum Dots, Putrescine, medicine, Nanotechnology, Vitis, Chlorophyll fluorescence, Abiotic stress, Agricultural Sciences, Drug Synergism, Agriculture Forestry and Fisheries, APX, lcsh:QK1-989, Plant Leaves, Salinity, Horticulture, 030104 developmental biology, chemistry, Priming, Nanoparticles, Grapevine, Research Article, 010606 plant biology & botany
Abstract

Background Salinity is an important global problem with destructive impacts on plants leading to different biochemical and metabolic changes in plants through induced oxidative stress that disturbs metabolism, growth, performance and productivity of plants. Given that putrescine (Put) and carbon quantum dots (CQDs), individually, have promising effects in different plant processes, the idea of their combination in a nano-structure “Put-CQD” lead to its synthesis to evaluate the potential exertion of synergistic effects. The current study aimed to investigate the application of newly-synthesized nanoparticles (NPs) consisting of CQDs and Put in grapevine (Vitis vinifera cv. ‘Sultana’) under salinity stress conditions. For this purpose, Put, CQDs and Put-CQD NPs at 5 and 10 mg L− 1 concentrations were applied as chemical priming agents in ‘Sultana’ grapevine 48 h prior salinity stress imposition (0 and 100 mM NaCl). Results Salinity significantly decreased (P ≤ 0.05) morphological parameters, photosynthetic pigments, chlorophyll fluorescence parameters and membrane stability index. In addition, salinity enhanced MDA, H2O2, proline content and antioxidant enzyme activity. Results revealed that Put-CQD NPs, particularly at 10 mg L− 1 concentration, alleviated the destructive impacts of salinity stress by improving leaf fresh and dry weights, K+ content, photosynthetic pigments, chlorophyll fluorescence and SPAD parameters, proline content, total phenolics and antioxidant enzymatic activities (CAT, APX, GP and SOD), while decreasing Na+ content, EL, MDA and H2O2 levels. Conclusion To conclude, Put-CQD NPs represent an innovative priming treatment that could be effectively applied on grapevine to improve plant performance under salinity stress conditions.

Published
2021

3. Cerium oxide nanoparticles (CeO2-NPs) improve growth parameters and antioxidant defense system in Moldavian Balm (Dracocephalum moldavica L.) under salinity stress

Author

Gholamreza Gohari, Mona Hasan Zadeh Mohammadi, Anahita Navai, Muhittin Kulak, Sima Panahirad, and Mohammad Kazem Bahrami

Subjects
Dracocephalum moldavica, Antioxidant, Lamiaceae, biology, medicine.medical_treatment, Sodium chloride, food and beverages, Photosynthetic pigment, biology.organism_classification, APX, Abiotic stress, Salinity, Horticulture, chemistry.chemical_compound, Dry weight, chemistry, Shoot, medicine, Nanotechnology, Proline, QK900-989, Reactive oxygen species, Plant ecology
Abstract

Salinity stress is one of the most destructive stress factors causing adverse impacts on growth and productivity of crops plants. In order to combat or to make crop plants compatible with salinity stress, many attempts have been made to alleviate the devastating impacts of salinity stress on plants. Of those attempts, engineered nano-particles (NPs) have gained great interest in recent years, having been tested in a number of crop plants; however, they remain to be investigated for medicinal and aromatic plants. For that reason, the interaction effects of cerium oxide NPs (CeO2 NPs at 25, 50 and 100 mg L−1) and salinity stress (50 and 100 mM NaCl) on Moldavian balm (Dracocephalum moldavica L.) was evaluated. Salinity significantly decreased agronomic traits such as leaf and shoot fresh and dry weight, photosynthetic pigment content and SPAD, whereas it increased MDA, H2O2 and proline (Pro) content, electrolyte leakage (EL) and antioxidant enzymatic activities (SOD, APX and GP). However, CeO2-NP treatments enhanced growth performance of the plants exposed under salinity stress by improving agronomic traits, photosynthetic pigment content, SPAD, Pro, and antioxidant enzymes. Furthermore, CeO2-NPs caused a decrease in MDA, H2O2 and EL via higher antioxidant enzymatic activity under salinity conditions. Of the concentrations of CeO2-NPs tested, 50 mg L−1 concentration gave the best results under both non-stress and salt-stress conditions. In conclusion, foliar spray of CeO2-NP treatments in Moldavian balm improved plant performance under salinity and may be considered as a promising treatment in alleviating the effects of salt stress.

Published
2021

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