Alleviation of Abiotic Stress in Medicinal Plants by PGPR

Shahzad, Sher Muhammad; Arif, Muhammad; Ashraf, Muhammad; Abid, Muhammad; Ghazanfar, Muhammad Usman; Riaz, Muhammad; Yasmeen, Tahira; Zahid, Muhammad Awais

doi:10.1007/978-3-319-13401-7_7

Cited by 11 publications

(4 citation statements)

References 167 publications

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“…Similar to many other plants, medicinal plants are also susceptible to various abiotic stresses such as drought, salinity, heavy metals, flooding, cold, nutrient deficiency [242,243] and biotic stresses [244] that have detrimental impact on growth, development and secretion of phytoconstituents. Findings indicate challenges akin to physiological imbalances such as overproduction of stress hormone, ethylene and nutritional imbalances that may influence the growth and therapeutic features of medicinal plants [245]. Reduction in the chlorophyll fluorescence (Fv/Fm) and relative water content (RWC) are some other harmful impacts on medicinal plants (e.g., Mentha pulegium) growing under stress.…”

Section: Abiotic Stress Alleviation In Medicinal Plants By Beneficial...mentioning

confidence: 99%

“…Apart from drought stress, the performance of medicinal plants is also destructively influenced by high salt levels [249,250], which are though can be circumvented by PGPR inhabiting rhizospheres, phyllospheres or endospheres [245,251,252]. Recently, coriander seeds inoculated with composite cultures of A. brasilense and A. chroococcum grown with variable concentrations of salts displayed a noteworthy enhancement in the chlorophyll a and b content, grain yield, stem biomass and total plant biomass.…”

Section: Abiotic Stress Alleviation In Medicinal Plants By Beneficial...mentioning

confidence: 99%

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Bioprospecting Plant Growth Promoting Rhizobacteria for Enhancing the Biological Properties and Phytochemical Composition of Medicinally Important Crops

et al. 2022

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Traditionally, medicinal plants have long been used as a natural therapy. Plant-derived extracts or phytochemicals have been exploited as food additives and for curing many health-related ailments. The secondary metabolites produced by many plants have become an integral part of human health and have strengthened the value of plant extracts as herbal medicines. To fulfil the demand of health care systems, food and pharmaceutical industries, interest in the cultivation of precious medicinal plants to harvest bio-active compounds has increased considerably worldwide. To achieve maximum biomass and yield, growers generally apply chemical fertilizers which have detrimental impacts on the growth, development and phytoconstituents of such therapeutically important plants. Application of beneficial rhizosphere microbiota is an alternative strategy to enhance the production of valuable medicinal plants under both conventional and stressed conditions due to its low cost, environmentally friendly behaviour and non-destructive impact on fertility of soil, plants and human health. The microbiological approach improves plant growth by various direct and indirect mechanisms involving the abatement of various abiotic stresses. Given the negative impacts of fertilizers and multiple benefits of microbiological resources, the role of plant growth promoting rhizobacteria (PGPR) in the production of biomass and their impact on the quality of bio-active compounds (phytochemicals) and mitigation of abiotic stress to herbal plants have been described in this review. The PGPR based enhancement in the herbal products has potential for use as a low cost phytomedicine which can be used to improve health care systems.

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Section: Abiotic Stress Alleviation In Medicinal Plants By Beneficial...mentioning

confidence: 99%

Section: Abiotic Stress Alleviation In Medicinal Plants By Beneficial...mentioning

confidence: 99%

Bioprospecting Plant Growth Promoting Rhizobacteria for Enhancing the Biological Properties and Phytochemical Composition of Medicinally Important Crops

et al. 2022

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“…A co-produced formulation of Azospirillum, phosphorus solubilizing bacteria (FEB) and pink pigmented facultative methylotropes were used as bioinoculants in cotton. Plant growth indicators and root growth, yield parameters and fiber quality indicators were determined [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Extraction of “Elicitor” and determination of volatile organic substances contained in the elicitor

Sobirova,

Muradova,

Khojanazarova

et al. 2023

E3S Web of Conf.

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In the 21st century, the increased farming activities have harmed both ecosystems and agricultural systems on Earth. This is because of the misuse of mineral fertilizers and toxic plant protection products. To obtain the “elicitor” extract, rhizobacteria were grown in a thermostat for 3 days and then subjected to autoclaving at a temperature of 120°C and 1 atm. for 20 minutes. Azospirillum, Azotobacter, and Pseudomonas are the three most significant growth-promoting bacteria. These organisms influence plant growth regulators, including auxin, gibberellin, and cytokines, in addition to biological nitrogen fixation and soil phosphate solubilization. The research mentions that Azotobacteria create antifungal substances that fight against plant infections, boost seedling viability and germination, and, as a consequence, enhance plant development in general. The result presented that the fifth peak at 10.525 minutes showed the presence of 4(dimethylamino)-α-(P-toluidine) benzylphosphine oxide at 16.0%. The sixth peak at 10.728 minutes contained 19.48% of quinoline-3-carbonitrile, 4-methyl-2-dimethylaminomethylamino, while the seventh peak at 11.177 minutes contained 41.8% of ethanediol % 2 C+bis(phenylhydrazone).

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“…eir medicinal properties are also severely affected by these environmental stresses. Whenever the stress conditions prevail, several imbalances occur in the plant physiology that consequently may influence therapeutic traits as well as the growth of these medicinal plants [8]. Salt stress is specifically considered as one of the important abiotic factors that limit the production of crops due to different types of stresses like osmotic disturbance, ionic imbalance, oxidative stress, and hormonal irregularities [9].…”

Section: Introductionmentioning

confidence: 99%

Exogenous Application of Ascorbic Acid Enhances the Antimicrobial and Antioxidant Potential of Ocimum sanctum L. Grown under Salt Stress

Munir

Khilji

Shabir

et al. 2021

Journal of Food Quality

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Ocimum sanctum L. (Tulsi) is the most important medicinal plant that has antimicrobial, antioxidants, and anticarcinogenic effects on human health. Plants, when under stress, gather several antioxidants and osmoprotectants. The present work focuses on the abiotic stress response of Tulsi and its mitigation by the application of ascorbic acid. In addition to this, an enhancement of antioxidant and antimicrobial activity was also analyzed using ascorbic acid. During the present work, when plants were grown under NaCl stress and ascorbic acid (AA) was provided with foliar applications, it ascertained encouraging effects on growth; likewise, its effect remains stable under salinity stress. The enzymatic antioxidants activity showed a significant change in response to AA alone or in combination. The highest catalase activity was recorded in plants subjected to 0.5 mM AA in combination with 100 mM NaCl (0.65 units/mL of enzyme). Likewise, a similar trend was recorded for the superoxide dismutase activity of Tulsi plants. The highest activity of SOD was recorded in plants subjected to 0.5 mM AA in combination with 100 mM NaCl (66.1 units/mg of protein). Flavonoid content showed its highest amount (27.41 mg/g) when plants were treated with 0.5 mM AA + 100 mM NaCl while the highest phenolic content (1.88 mg/g) was analyzed in salt treated plants sprayed with 0.5 mM AA. In the case of antimicrobial activity, 0.5 mM AA treated plants gave the highest value for the Staphylococcus aureus as 2.15 cm and in Clostridium species was 2.1 cm in the plants treated with 1 mM AA alone. Hence, the findings of the present study may lead to the conclusion that AA has a significant role in defense mechanisms of plants in response to salt stress. Further, it enhances the antimicrobial and antioxidant potential of Tulsi plants grown under salt stress.

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Alleviation of Abiotic Stress in Medicinal Plants by PGPR

Cited by 11 publications

References 167 publications

Bioprospecting Plant Growth Promoting Rhizobacteria for Enhancing the Biological Properties and Phytochemical Composition of Medicinally Important Crops

Bioprospecting Plant Growth Promoting Rhizobacteria for Enhancing the Biological Properties and Phytochemical Composition of Medicinally Important Crops

Extraction of “Elicitor” and determination of volatile organic substances contained in the elicitor

Exogenous Application of Ascorbic Acid Enhances the Antimicrobial and Antioxidant Potential of Ocimum sanctum L. Grown under Salt Stress

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