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Development of a defined compost system for the study of plant-microbe interactions.
Development of a defined compost system for the study of plant-microbe interactions.
- Source :
-
Scientific reports [Sci Rep] 2020 May 05; Vol. 10 (1), pp. 7521. Date of Electronic Publication: 2020 May 05. - Publication Year :
- 2020
-
Abstract
- Plant growth promoting rhizobacteria can improve plant health by providing enhanced nutrition, disease suppression and abiotic stress resistance, and have potential to contribute to sustainable agriculture. We have developed a sphagnum peat-based compost platform for investigating plant-microbe interactions. The chemical, physical and biological status of the system can be manipulated to understand the relative importance of these factors for plant health, demonstrated using three case studies: 1. Nutrient depleted compost retained its structure, but plants grown in this medium were severely stunted in growth due to removal of essential soluble nutrients - particularly, nitrogen, phosphorus and potassium. Compost nutrient status was replenished with the addition of selected soluble nutrients, validated by plant biomass; 2. When comparing milled and unmilled compost, we found nutrient status to be more important than matrix structure for plant growth; 3. In compost deficient in soluble P, supplemented with an insoluble inorganic form of P (Ca <subscript>3</subscript> (PO <subscript>4</subscript> ) <subscript>2</subscript> ), application of a phosphate solubilising Pseudomonas strain to plant roots provides a significant growth boost when compared with a Pseudomonas strain incapable of solubilising Ca <subscript>3</subscript> (PO <subscript>4</subscript> ) <subscript>2</subscript> . Our findings show that the compost system can be manipulated to impose biotic and abiotic stresses for testing how microbial inoculants influence plant growth.
- Subjects :
- Agriculture
Biodegradation, Environmental
Biomass
Calcium Phosphates chemistry
Composting
Crops, Agricultural microbiology
Hydrogen-Ion Concentration
Phosphates
Plant Development
Plant Roots growth & development
RNA, Ribosomal, 16S metabolism
Soil chemistry
Soil Microbiology
Triticum
Nitrogen analysis
Phosphorus analysis
Plants microbiology
Potassium analysis
Pseudomonas physiology
Subjects
Details
- Language :
- English
- ISSN :
- 2045-2322
- Volume :
- 10
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Scientific reports
- Publication Type :
- Academic Journal
- Accession number :
- 32372006
- Full Text :
- https://doi.org/10.1038/s41598-020-64249-0