Medicinal plants under abiotic stress

Imadi, Sameen Ruqia; Gul, Alvina; Hashem, Abeer; Abd_Allah, Elsayed Fathi; Ahmad, Parvaiz

doi:10.1002/9781119081005.ch16

Cited by 9 publications

(4 citation statements)

References 87 publications

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“…Fluxes in environmental parameters predispose plant species to different types of abiotic stress, such as water deficit, salinity, heavy metal toxicity, high and low-temperature stress, UV radiation stress, and nutrient deficiency [ 1 ]. Generally, abiotic stress is detrimental to medicinal plants, influencing growth, development, and related metabolic pathways that are responsible for synthesizing valuable phytochemicals [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Growth-Promoting Characteristics of Fungal and Bacterial Endophytes Isolated from a Drought-Tolerant Mint Species Endostemon obtusifolius (E. Mey. ex Benth.) N. E. Br

Ogbe

Gupta

Stirk

et al. 2023

Plants

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Endophytes are primarily endosymbiotic bacteria and fungi that colonize the interior tissues of their host plant. They enhance the host plant’s growth and attenuate adverse effects of biological stress. Endophytic species of many indigenous plants are an untapped resource of plant growth-promoting microorganisms that can mitigate abiotic stress effects. Thus, this study aimed to isolate endophytes from the roots and leaves of the medicinal plant Endostemon obtusifolius to evaluate their in vitro growth-promoting capacities and drought tolerance and to characterize the most promising species. Twenty-six endophytes (fourteen bacteria and twelve fungi) were isolated and cultured from the roots and leaves of E. obtusifolius. All 26 endophytes produced flavonoids, and 14 strains produced phenolic compounds. Of the 11 strains that displayed good free radical scavenging capability (low IC50) in the 1-1-diphenyl-1-picryhydrazyl radical scavenging assay, only three strains could not survive the highest drought stress treatment (40% polyethylene glycol). These 11 strains were all positive for ammonia and siderophore production and only one strain failed to produce hydrogen cyanide and solubilize phosphate. Seven isolates showed aminocyclopropane-1-carboxylate deaminase activity and differentially synthesized indole-3-acetic acid. Using molecular tools, two promising symbiotic, drought stress tolerant, and plant growth-enhancing endophytic species (EORB-2 and EOLF-5) were identified as Paenibacillus polymyxa and Fusarium oxysporum. The results of this study demonstrate that P. polymyxa and F. oxysporum should be further investigated for their drought stress mitigation and plant growth enhancement effects as they have the potential to be developed for use in sustainable agricultural practices.

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Section: Introductionmentioning

confidence: 99%

Growth-Promoting Characteristics of Fungal and Bacterial Endophytes Isolated from a Drought-Tolerant Mint Species Endostemon obtusifolius (E. Mey. ex Benth.) N. E. Br

Ogbe

Gupta

Stirk

et al. 2023

Plants

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“…The main sources of cadmium pollution include mining, smelting, the weathering of cadmium rich rocks, the overuse of phosphate fertilizers and the use of sewage sludge and metal polluted water for crop irrigation (Zoffoli et al, 2013). Cadmium shows high mobility in the soil–plant system and is quickly absorbed by plants and transported to more sensitive parts of the plant, damaging normal metabolism (Imadi et al, 2016). An increased uptake of cadmium retards growth, and its immediate effects include necrosis and chlorophyll damage, hampered nutrient uptake, reduced enzyme activity and carbon assimilation and increased phytotoxicity (Singh and Prasad, 2014).…”

Section: Introductionmentioning

confidence: 99%

Role of calcium in AMF-mediated alleviation of the adverse impacts of cadmium stress in Bassia indica [Wight] A.J. Scott

Hashem

Malik

Wirth

et al. 2019

Saudi Journal of Biological Sciences

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The aim of this study was to evaluate cadmium stress induced changes in the growth, lipid peroxidation and antioxidant activity of Bassia indica associated with arbuscular mycorrhizal fungi (AMF) and their amelioration by calcium application. Cadmium stress can cause alterations in the physiological and biochemical processes in plants. A calcium application combined with an AMF treatment resulted in the reduction of lipid peroxidation and the production of hydrogen peroxide, thereby mediating the mitigation of cadmium induced oxidative stress. The activity of antioxidant enzymes increased with cadmium application, whereas AMF inoculation combined with a calcium application further enhanced their activity. An increase in the content of non-enzymatic antioxidants such as ascorbate, reduced glutathione (GSH), oxidized glutathione (GSSG) and S-nitrosoglutathione (GSNO) in AMF-inoculated and calcium-treated plants further suggests their role in strengthening the antioxidant defense system that results in maintained growth. The application of calcium combined with the AMF treatment caused a significant reduction in lipid peroxidation and in the production of hydrogen peroxide, thereby mediating the mitigation of the cadmium induced oxidative stress. Increased proline accumulation was clearly evident in stressed plants, and the calcium application as well as the AMF inoculation further induced proline synthesis, thereby providing efficient protection against cadmium stress by increasing the maintenance of the systemic resistance criteria.

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“…Exogenous calcium has also been shown in several previous studies to mitigate salt stress in tomato by osmotic adjustment, an increase in antioxidant enzyme activities, the accumulation of sodium, potassium, and proline, as well as through enhancing the formation of roots and shoots [29][30][31]. It increases tolerance to salt stress by modifying growth performance, photosynthetic effectiveness, and stress-induced ROS metabolism [32,33]. Some crop plants, such as peas, wheat, sunflower, and tomato, may benefit from calcium to lessen the negative effects of salt, according to some results [34,35].…”

mentioning

confidence: 86%

Mitigation of Salinity Stress Effects in Tomatoa (Lycopersicon esculentum Mill. ) by Using Calcium Chloride

Al-Rubaiee

2024

nabatia

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In the world, salinity has become an increasing danger for agricultural production. A factorial pot experiment using a completely randomized design (CRD) was conducted in the present research, aimed to look at how growth, yield parameters, and biochemical contents were influenced by the exogenous application of calcium chloride (CaCl2, 0, 5, and 10 mM) of tomato exposed to salt stress (NaCl, 0, 25, and 75 mM), Growth was slowed and Both the sodium percentage and proline content increased under salt stress. However, the growth, yield, and biochemical content characteristics were improved by the application of Ca, enhanced plant height, dry weight of the shoots and roots, the number of fruits per plant, fruit weight, the percentage of nitrogen, calcium, magnesium, phosphorus, potassium, relative water content (RWC), and increased proline content, moreover a significant reduction in the sodium percentages, when compared to the control. Lastly, exogenous Ca use improves resistance to salt stress. Moreover, the use of 10 mM CaCl2 caused the beneficial effects of Ca, which has been suggested to enhance tomato performance in salinized conditions.

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Medicinal plants under abiotic stress

Cited by 9 publications

References 87 publications

Growth-Promoting Characteristics of Fungal and Bacterial Endophytes Isolated from a Drought-Tolerant Mint Species Endostemon obtusifolius (E. Mey. ex Benth.) N. E. Br

Growth-Promoting Characteristics of Fungal and Bacterial Endophytes Isolated from a Drought-Tolerant Mint Species Endostemon obtusifolius (E. Mey. ex Benth.) N. E. Br

Role of calcium in AMF-mediated alleviation of the adverse impacts of cadmium stress in Bassia indica [Wight] A.J. Scott

Mitigation of Salinity Stress Effects in Tomatoa (Lycopersicon esculentum Mill. ) by Using Calcium Chloride

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