Improvement of salt tolerance in Stevia rebaudiana by co-application of endophytic fungi and exogenous spermidine

Saravi, Hadiseh Bahari; Gholami, Ahmad; Pirdashti, Hemmatollah; Firouzabadi, Mehdi Baradaran; Asghari, Hamid Reza; Yaghoubian, Yasser

doi:10.1016/j.indcrop.2021.114443

Cited by 22 publications

(6 citation statements)

References 71 publications

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“…8 and 9 ). Spermidine’s impact on these parameters indicates its role in maintaining membrane integrity, quenching reactive oxygen species, and reducing oxidative stress [ 51 ]. The concentration-dependent effects of spermidine on antioxidant enzyme activity highlight a delicate balance between reactive oxygen species scavenging and production regulation, crucial for optimizing antioxidant function without inducing oxidative stress.…”

Section: Discussionmentioning

confidence: 99%

Enhancing maize growth through the synergistic impact of potassium enrich biochar and spermidine

Huang,

Masood

et al. 2024

BMC Plant Biol

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Maize cultivated for dry grain covers approximately 197 million hectares globally, securing its position as the second most widely grown crop worldwide after wheat. Although spermidine and biochar individually showed positive impacts on maize production in existing literature, their combined effects on maize growth, physiology, nutrient uptake remain unclear and require further in-depth investigation. That’s why a pot experiment was conducted on maize with spermidine and potassium enriched biochar (KBC) as treatments in Multan, Pakistan, during the year 2022. Four levels of spermidine (0, 0.15, 0.30, and 0.45mM) and two levels of potassium KBC (0 and 0.50%) were applied in completely randomized design (CRD). Results showed that 0.45 mM spermidine under 0.50% KBC caused significant enhancement in maize shoot length (11.30%), shoot fresh weight (25.78%), shoot dry weight (17.45%), root length (27.95%), root fresh weight (26.80%), and root dry weight (20.86%) over control. A significant increase in maize chlorophyll a (50.00%), chlorophyll b (40.40%), total chlorophyll (47.00%), photosynthetic rate (34.91%), transpiration rate (6.51%), and stomatal conductance (15.99%) compared to control under 0.50%KBC validate the potential of 0.45 mM spermidine. An increase in N, P, and K concentration in the root and shoot while decrease in electrolyte leakage and antioxidants also confirmed that the 0.45 mM spermidine performed more effectively with 0.50%KBC. In conclusion, 0.45 mM spermidine with 0.50%KBC is recommended for enhancing maize growth.

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Section: Discussionmentioning

confidence: 99%

Enhancing maize growth through the synergistic impact of potassium enrich biochar and spermidine

Huang,

Masood

et al. 2024

BMC Plant Biol

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“…For example, in addition to scavenging free radicals, they can affect the activity of antioxidant enzymes and also influence proline. Furthermore, these substances as growth regulators can reduce Na + and Cl - during drought stress [ 44 ].…”

Section: Discussionmentioning

confidence: 99%

Mitigation of salinity stress in yarrow (Achillea millefolium L.) plants through spermidine application

Alijani,

Raji,

Bistgani

et al. 2024

PLoS ONE

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This study investigated the mitigating effects of spermidine on salinity-stressed yarrow plants (Achillea millefolium L.), an economically important medicinal crop. Plants were treated with four salinity levels (0, 30, 60, 90 mM NaCl) and three spermidine concentrations (0, 1.5, 3 μM). Salinity induced electrolyte leakage in a dose-dependent manner, increasing from 22% at 30 mM to 56% at 90 mM NaCl without spermidine. However, 1.5 μM spermidine significantly reduced leakage across salinities by 1.35–11.2% relative to untreated stressed plants. Photosynthetic pigments (chlorophyll a, b, carotenoids) also exhibited salinity- and spermidine-modulated responses. While salinity decreased chlorophyll a, both spermidine concentrations increased chlorophyll b and carotenoids under most saline conditions. Salinity and spermidine synergistically elevated osmoprotectants proline and total carbohydrates, with 3 μM spermidine augmenting proline and carbohydrates up to 14.4% and 13.1% at 90 mM NaCl, respectively. Antioxidant enzymes CAT, POD and APX displayed complex regulation influenced by treatment factors. Moreover, salinity stress and spermidine also influenced the expression of linalool and pinene synthetase genes, with the highest expression levels observed under 90 mM salt stress and the application of 3 μM spermidine. The findings provide valuable insights into the responses of yarrow plants to salinity stress and highlight the potential of spermidine in mitigating the adverse effects of salinity stress.

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“…Moreover, DSEs have an impact on the photosynthetic activity when plants are under stress conditions. Thus, the inoculation with endophyte fungi, such as P. indica, T. virens, or P. indica + T. virens, increased the chlorophyll content and photosynthetic activity of Stevia [74]. This may be because DSEs are capable of decomposing photosynthates; DSEs enable photosynthetic feedback inhibition and improve the physiology of host plants by increasing the chlorophyll concentration and transpiration rate in stressed soils [33,75].…”

Section: Dses and Their Connection To Drought And Salinity Mitigationmentioning

confidence: 99%

“…This may be because DSEs are capable of decomposing photosynthates; DSEs enable photosynthetic feedback inhibition and improve the physiology of host plants by increasing the chlorophyll concentration and transpiration rate in stressed soils [33,75]. Furthermore, DSEs are involved in improving the ability to capture the excitation energy released by chloroplasts under drought conditions, resulting in an increased photosynthetic rate and improved leaf nutrition caused by the enhanced C assimilation [74]. Therefore, the use of DSEs Alternaria alternata, Paraphoma pye, and Paraphoma radicina on wheat and rice crops led to increases in the plant height, leaf growth, chlorophyll content, and photosynthetic rate, as well as a decrease in the intercellular carbon dioxide, which alleviated the damage caused to the photosynthetic processes by drought [50,72].…”

Section: Dses and Their Connection To Drought And Salinity Mitigationmentioning

confidence: 99%

Importance of Dark Septate Endophytes in Agriculture in the Face of Climate Change

Huertas,

Jiménez,

Diánez

et al. 2024

JoF

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Climate change is a notable challenge for agriculture as it affects crop productivity and yield. Increases in droughts, salinity, and soil degradation are some of the major consequences of climate change. The use of microorganisms has emerged as an alternative to mitigate the effects of climate change. Among these microorganisms, dark septate endophytes (DSEs) have garnered increasing attention in recent years. Dark septate endophytes have shown a capacity for mitigating and reducing the harmful effects of climate change in agriculture, such as salinity, drought, and the reduced nutrient availability in the soil. Various studies show that their association with plants helps to reduce the harmful effects of abiotic stresses and increases the nutrient availability, enabling the plants to thrive under adverse conditions. In this study, the effect of DSEs and the underlying mechanisms that help plants to develop a higher tolerance to climate change were reviewed.

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Improvement of salt tolerance in Stevia rebaudiana by co-application of endophytic fungi and exogenous spermidine

Cited by 22 publications

References 71 publications

Enhancing maize growth through the synergistic impact of potassium enrich biochar and spermidine

Enhancing maize growth through the synergistic impact of potassium enrich biochar and spermidine

Mitigation of salinity stress in yarrow (Achillea millefolium L.) plants through spermidine application

Importance of Dark Septate Endophytes in Agriculture in the Face of Climate Change

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