Germination Parameters and Responses of Antioxidant Enzymatic Activities of Two Medicinal Plants (Peganum harmala L. and Origanum majorana L.) Under Heavy Metal Stress

Elallem, Khadija Ait; Bakrim, Widad Ben; Ennoury, Abdelhamid; Metougui, Mohamed Louay; Yasri, Abdelaziz; Boularbah, Ali

doi:10.1007/s42729-022-00943-4

Cited by 6 publications

(2 citation statements)

References 68 publications

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“…Based on the high salt tolerance, reclamation potential, and medicinal value of P. harmala [ 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ], this study investigated the germination responses of its seeds to various environmental factors, including light, temperature, drought, and salinity. Our findings suggest that P. harmala is sensitive to temperature, light, drought, and salinity.…”

Section: Discussionmentioning

confidence: 99%

Seed Germination Ecology of the Medicinal Plant Peganum harmala (Zygophyllaceae)

Yan

Tanveer

et al. 2023

Plants

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Seed germination is a crucial stage in the life cycle of annuals in arid, saline regions and is particularly vulnerable to abiotic stresses. Peganum harmala, a valuable medicinal plant, has limited research on its seed germination response to different environmental stresses in the arid, saline regions of Central Asia. To investigate this, we studied the effects of various temperature regimes (ranging from 20/5 to 35/20 °C), light exposure (12 hours light/12 hours dark and continuous dark), seven levels of polyethylene glycol (PEG-6000) concentration (ranging from 0–30%), and four types of salinity (ranging from 0–600 mmol L−1). Our findings show that photoperiod and temperature significantly influence germination. Optimal temperature range for seed germination was observed at 30/15 °C, with simulated critical and limit values of drought tolerance being highest (17.30% and 24.98%). However, higher temperatures (35/20 °C) and lower temperatures (20/5 °C) reduced the critical and limit values of drought tolerance. Additionally, the type and concentration of salinity had a significant effect on the seed germination, shoot, and root lengths of P. harmala. Regression analysis indicated that the critical values of NaCl, Na2SO4, NaHCO3, and Na2CO3 tolerance during germination were 178 mmol L−1, 101 mmol L−1, 106 mmol L−1, and 54 mmol L−1, respectively. Salinity inhibition on seed germination followed the order: NaCl < NaHCO3 < Na2SO4 < Na2CO3. Moreover, NaCl, Na2SO4, NaHCO3, and Na2CO3 significantly inhibited the growth of P. harmala seedlings in both shoots and roots. Our study demonstrates the sensitivity of P. harmala to environmental factors such as light, temperature, drought, and salinity. The study provides valuable information on the germination ecology of P. harmala under diverse ecological scenarios, which can be useful in developing efficient propagation and utilization of this medicinal plant.

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Section: Discussionmentioning

confidence: 99%

Seed Germination Ecology of the Medicinal Plant Peganum harmala (Zygophyllaceae)

Yan

Tanveer

et al. 2023

Plants

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“…These enzymes are crucial for regulating osmotic pressure in the plant cytoplasm following abiotic stress. They also help stabilize biomolecular structures, decrease cellular acidity, and regulate cellular redox [11,12]. By converting excessive reactive oxygen species and free radicals into less toxic substances, antioxidant enzymes help maintain a balanced level of ROS in plant cells and provide protection against heavy metal stress [13,14].…”

Section: Introductionmentioning

confidence: 99%

Integrative Physiological and Transcriptome Analysis Reveals the Mechanism of Cd Tolerance in Sinapis alba

Cai,

Yang,

Fang

et al. 2023

Genes

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Recently, pollution caused by the heavy metal Cd has seriously affected the environment and agricultural crops. While Sinapis alba is known for its edible and medicinal value, its tolerance to Cd and molecular response mechanism remain unknown. This study aimed to analyze the tolerance of S. alba to Cd and investigate its molecular response mechanism through transcriptomic and physiological indicators. To achieve this, S. alba seedlings were treated with different concentrations of CdCl2 (0.25 mmol/L, 0.5 mmol/L, and 1.0 mmol/L) for three days. Based on seedling performance, S. alba exhibited some tolerance to a low concentration of Cd stress (0.25 mmol/L CdCl2) and a strong Cd accumulation ability in its roots. The activities and contents of several antioxidant enzymes generally exhibited an increase under the treatment of 0.25 mmol/L CdCl2 but decreased under the treatment of higher CdCl2 concentrations. In particular, the proline (Pro) content was extremely elevated under the 0.25 and 0.5 mmol/L CdCl2 treatments but sharply declined under the 1.0 mmol/L CdCl2 treatment, suggesting that Pro is involved in the tolerance of S. alba to low concentration of Cd stress. In addition, RNA sequencing was utilized to analyze the gene expression profiles of S. alba exposed to Cd (under the treatment of 0.25 mmol/L CdCl2). The results indicate that roots were more susceptible to disturbance from Cd stress, as evidenced by the detection of 542 differentially expressed genes (DEGs) in roots compared to only 37 DEGs in leaves. GO and KEGG analyses found that the DEGs induced by Cd stress were primarily enriched in metabolic pathways, plant hormone signal transduction, and the biosynthesis of secondary metabolites. The key pathway hub genes were mainly associated with intracellular ion transport and cell wall synthesis. These findings suggest that S. alba is tolerant to a degree of Cd stress, but is also susceptible to the toxic effects of Cd. Furthermore, these results provide a theoretical basis for understanding Cd tolerance in S. alba.

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Saltbuch extract: a bio-solutionfor cadmium stress sorghum plants in germination and maturation

et al. 2023

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Germination Parameters and Responses of Antioxidant Enzymatic Activities of Two Medicinal Plants (Peganum harmala L. and Origanum majorana L.) Under Heavy Metal Stress

Cited by 6 publications

References 68 publications

Seed Germination Ecology of the Medicinal Plant Peganum harmala (Zygophyllaceae)

Seed Germination Ecology of the Medicinal Plant Peganum harmala (Zygophyllaceae)

Integrative Physiological and Transcriptome Analysis Reveals the Mechanism of Cd Tolerance in Sinapis alba

Saltbuch extract: a bio-solutionfor cadmium stress sorghum plants in germination and maturation

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