Bacterial and Fungal Communities Are Differentially Modified by Melatonin in Agricultural Soils Under Abiotic Stress.
| Autor: | Madigan AP; Department of Animal, Plant and Soil Sciences, AgriBio, La Trobe University, Melbourne, VIC, Australia.; Department of Physiology, Anatomy and Microbiology, La Trobe University, Melbourne, VIC, Australia., Egidi E; Hawkesbury Institute for the Environment, Western Sydney University, Richmond, NSW, Australia., Bedon F; Department of Animal, Plant and Soil Sciences, AgriBio, La Trobe University, Melbourne, VIC, Australia., Franks AE; Department of Physiology, Anatomy and Microbiology, La Trobe University, Melbourne, VIC, Australia.; Centre for Future Landscapes, School of Life Sciences, La Trobe University, Melbourne, VIC, Australia., Plummer KM; Department of Animal, Plant and Soil Sciences, AgriBio, La Trobe University, Melbourne, VIC, Australia. |
|---|---|
| Jazyk: | angličtina |
| Zdroj: | Frontiers in microbiology [Front Microbiol] 2019 Dec 03; Vol. 10, pp. 2616. Date of Electronic Publication: 2019 Dec 03 (Print Publication: 2019). |
| DOI: | 10.3389/fmicb.2019.02616 |
| Abstrakt: | 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. (Copyright © 2019 Madigan, Egidi, Bedon, Franks and Plummer.) |
| Databáze: | MEDLINE |
| Externí odkaz: |
|