Bacterial and fungal communities are differentially modified by melatonin in agricultural soils under abiotic stress

Madigan, Andrew P.; Egidi, Eleonora; Bedon, Frank; Franks, Ashley E.; Plummer, Kim M.

doi:10.1101/652388

Cited by 5 publications

(5 citation statements)

References 81 publications

(108 reference statements)

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“…Here, two indexes (Chao 1 and observed species) for fungal communities and four indexes (Chao 1,observed species,Shannon and Simpson) for bacterial communities all showed significant differences among treatments, which implied that rhizospherically applied melatonin changed the richness of fungal communities and altered both richness and diversity of bacterial communities under low temperature. Similarly, exogenous melatonin alters the structure of soil bacteria and has a significant effect on bacterial alpha diversity under abiotic stress conditions (Madigan et al, 2019). In addition, exogenous melatonin reduces the Shannon diversity of bacterial community and reprograms the rhizosphere microbial community to modulate the responses of barley to abiotic stress (Ye et al, 2022), which is consistent with our findings.…”

Section: Rhizospherically Applied Melatonin Altered the Diversity Of ...supporting

confidence: 90%

Rhizosphere melatonin application reprograms nitrogen-cycling related microorganisms to modulate low temperature response in barley

Jiang

Ye²,

Liu³

et al. 2022

Front. Plant Sci.

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Rhizospheric melatonin application has a positive effect on the tolerance of plants to low temperature; however, it remains unknown whether the rhizosphere microorganisms are involved in this process. The aim of this study was to investigate the effect of exogenous melatonin on the diversity and functioning of fungi and bacteria in rhizosphere of barley under low temperature. The results showed that rhizospheric melatonin application positively regulated the photosynthetic carbon assimilation and redox homeostasis in barley in response to low temperature. These effects might be associated with an altered diversity of microbial community in rhizosphere, especially the species and relative abundance of nitrogen cycling related microorganisms, as exemplified by the changes in rhizosphere metabolites in the pathways of amino acid synthesis and metabolism. Collectively, it was suggested that the altered rhizospheric microbial status upon melatonin application was associated with the response of barley to low temperature. This suggested that the melatonin induced microbial changes should be considered for its application in the crop cold-resistant cultivation.

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Section: Rhizospherically Applied Melatonin Altered the Diversity Of ...supporting

confidence: 90%

Rhizosphere melatonin application reprograms nitrogen-cycling related microorganisms to modulate low temperature response in barley

Jiang

Ye²,

Liu³

et al. 2022

Front. Plant Sci.

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“…For example, melatonin treatment modulates the bacterial and fungal communities in agricultural soils under abiotic stress. This treatment even increases the populations of some microbes as indicated by the increased operational taxonomic units (OUT) which are suppressed under abiotic stress (150). Recently Madigan et al have also observed that high doses of melatonin application increase the abiotic stress tolerance to phytopathogenic fungi in an in vitro study (Melatonin Research, in press).…”

Section: Melatonin In Infectious Diseasesmentioning

confidence: 99%

Potential utility of melatonin in deadly infectious diseases related to the overreaction of innate immune response and destructive inflammation: focus on COVID-19

Tan¹,

Hardeland²

2020

Melatonin Res.

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The high mortality of deadly virus infectious diseases including SARS, MERS, COVID-19, and avian flu is often caused by the uncontrolled innate immune response and destructive inflammation. The majority of viral diseases are self-limiting under the help of the activated adaptive immune system. This activity is cell proliferation dependent and thus, it requires several weeks to develop. Patients are vulnerable and mortality usually occurs during this window period. To control the innate immune response and reduce the inflammation during this period will increase the tolerance of patients and lowers the mortality in the deadly virus infection. Melatonin is a molecule that displays respective properties, since it downregulates the overreaction of the innate immune response and overshooting inflammation, but also promotes the adaptive immune activity. Many studies have reported the beneficial effects of melatonin on deadly virus infections in different animal models and its therapeutic efficacy in septic shock patients. Furthermore, melatonin has a great safety margin without serious adverse effects. We suggest the use of melatonin as an adjunctive or even regular therapy for deadly viral diseases, especially if no efficient direct anti-viral treatment is available.

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“…Soils were sampled with the permissions of Rob Binks in Yaloak estate, Bullan, VIC, and Gary Clarke in Melbourne Polytechnic Farm, Yan Yean, VIC, Australia. This manuscript has been released as a Pre-Print at bioRxiv (Madigan et al, 2019).…”

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Bacterial and Fungal Communities Are Differentially Modified by Melatonin in Agricultural Soils Under Abiotic Stress

et al. 2019

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An extensive body of evidence from the last decade has indicated that melatonin enhances plant resistance to a range of biotic and abiotic stressors. This has led to an interest in the application of melatonin in agriculture to reduce negative physiological effects from environmental stresses that affect yield and crop quality. However, there are no reports regarding the effects of melatonin on soil microbial communities under abiotic stress, despite the importance of microbes for plant root health and function. Three agricultural soils associated with different land usage histories (pasture, canola or wheat) were placed under abiotic stress by cadmium (100 or 280 mg kg−1 soil) or salt (4 or 7 g kg−1 soil) and treated with melatonin (0.2 and 4 mg kg−1 soil). Automated Ribosomal Intergenic Spacer Analysis (ARISA) was used to generate Operational Taxonomic Units (OTU) for microbial community analysis in each soil. Significant differences in richness (α diversity) and community structures (β diversity) were observed between bacterial and fungal assemblages across all three soils, demonstrating the effect of melatonin on soil microbial communities under abiotic stress. The analysis also indicated that the microbial response to melatonin is governed by the type of soil and history. The effects of melatonin on soil microbes need to be regarded in potential future agricultural applications.

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Bacterial and fungal communities are differentially modified by melatonin in agricultural soils under abiotic stress

Cited by 5 publications

References 81 publications

Rhizosphere melatonin application reprograms nitrogen-cycling related microorganisms to modulate low temperature response in barley

Rhizosphere melatonin application reprograms nitrogen-cycling related microorganisms to modulate low temperature response in barley

Potential utility of melatonin in deadly infectious diseases related to the overreaction of innate immune response and destructive inflammation: focus on COVID-19

Bacterial and Fungal Communities Are Differentially Modified by Melatonin in Agricultural Soils Under Abiotic Stress

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