Towards a Better Understanding of Melanins from Dark Septate Endophytes (DSEs): Their Variability, Synthesis Pathways and Biological Roles

Lopez, Roberto Oscar; Chiocchio, Viviana Mónica; Ruscitti, Marcela Fabiana; Taborda, Carlos Pelleschi; Saparrat, Mario Carlos Nazareno

doi:10.1007/s42729-024-01693-1

Cited by 6 publications

(2 citation statements)

References 112 publications

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“…In the present study, we found that the MDA content, POD and CAT activities, and soluble protein content of DSE showed an increasing trend with the increasing levels of NaCl, indicating that the DSE strains under evaluation were challenged by NaCl stress and that the improvement of antioxidant enzyme activity and accumulation of osmotic regulatory substance might be important pathways for DSE to tolerate salt stress. Melanin has been shown to improve the survival of DSE in harsh environments by its ability to mitigate oxidative damage . In this study, the melanin content in the mycelia of DSE treated with salt stress was significantly reduced compared to the control, which might be because salt stress could not induce the production of melanin in DSE.…”

Section: Discussionmentioning

confidence: 72%

Alleviation of Salt Stress and Changes in Glycyrrhizic Acid Accumulation by Dark Septate Endophytes in Glycyrrhiza glabra Grown under Salt Stress

Tan,

Yue,

et al. 2024

J. Agric. Food Chem.

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This study aimed to investigate the mechanisms by which dark septate endophytes (DSE) regulate salt tolerance and the accumulation of bioactive constituents in licorice. First, the salt stress tolerance and resynthesis with the plant effect of isolated DSE from wild licorice were tested. Second, the performance of licorice inoculated with DSE, which had the best salt-tolerant and growth-promoting effects, was examined under salt stress. All isolated DSE showed salt tolerance and promoted plant growth, with Curvularia lunata D43 being the most effective. Under salt stress, C. lunata D43 could promote growth, increase antioxidant enzyme activities, enhance glycyrrhizic acid accumulation, improve key enzyme activities in the glycyrrhizic acid synthesis pathway, and induce the expression of the key enzyme gene and salt tolerance gene of licorice. The structural equation model demonstrated that DSE alleviate the negative effects of salt stress through direct and indirect pathways. Variations in key enzyme activities, gene expression, and bioactive constituent concentration can be attributed to the effects of DSE. These results contribute to revealing the value of DSE for cultivating medicinal plants in saline soils.

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Section: Discussionmentioning

confidence: 72%

Alleviation of Salt Stress and Changes in Glycyrrhizic Acid Accumulation by Dark Septate Endophytes in Glycyrrhiza glabra Grown under Salt Stress

Tan,

Yue,

et al. 2024

J. Agric. Food Chem.

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“…Different studies have found that, among other mechanisms, DSEs can increase the plant resistance by upregulating the antioxidant enzymes, especially the superoxide dismutase (SOD) activity, which is an important protective enzyme against reactive oxygen species (ROS) [35], increasing the polysaccharide production, and increasing the production of glutathione, proline, soluble sugar, and a large amount of melanin under stress [36] (Table 1). Likewise, endophytic fungi like S. indica have frequently been reported to mediate the plant root morphology and alter the composition of the root exudates [37][38][39]. Thus, DSEs and their extracellular metabolites have effects on the glycerophospholipid metabolism and the N-glycan biosynthesis pathway in the plant [40].…”

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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Melanized root-associated fungi: key players in plant–soil systems

Netherway,

Bahram

2024

Trends in Microbiology

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Towards a Better Understanding of Melanins from Dark Septate Endophytes (DSEs): Their Variability, Synthesis Pathways and Biological Roles

Cited by 6 publications

References 112 publications

Alleviation of Salt Stress and Changes in Glycyrrhizic Acid Accumulation by Dark Septate Endophytes in Glycyrrhiza glabra Grown under Salt Stress

Alleviation of Salt Stress and Changes in Glycyrrhizic Acid Accumulation by Dark Septate Endophytes in Glycyrrhiza glabra Grown under Salt Stress

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

Melanized root-associated fungi: key players in plant–soil systems

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