Disease protection and allelopathic interactions of seed-transmitted endophytic pseudomonads of invasive reed grass (Phragmites australis)
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- More information: Publisher Index Page (via DOI) Publicly accessible after 1/7/2017 (public access data via CHORUS)
- Data Release: USGS data release - Native and Invasive Species Plant Growth and Mortality in Growth Media Inoculated with Bacteria Found on Phragmites From New Jersey (2016)
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Abstract
Background and aims
Non-native Phragmites australis (haplotype M) is an invasive grass that decreases biodiversity and produces dense stands. We hypothesized that seeds of Phragmites carry microbes that improve seedling growth, defend against pathogens and maximize capacity of seedlings to compete with other plants.
Methods
We isolated bacteria from seeds of Phragmites, then evaluated representatives for their capacities to become intracellular in root cells, and their effects on: 1.) germination rates and seedling growth, 2.) susceptibility to damping-off disease, and 3.) mortality and growth of competitor plant seedlings (dandelion (Taraxacum officionale F. H. Wigg) and curly dock (Rumex crispus L.)).
Results
Ten strains (of 23 total) were identified and characterized; seven were identified as Pseudomonas spp. Strains Sandy LB4 (Pseudomonas fluorescens) and West 9 (Pseudomonas sp.) entered root meristems and became intracellular. These bacteria improved seed germination in Phragmites and increased seedling root branching in Poa annua. They increased plant growth and protected plants from damping off disease. Sandy LB4 increased mortality and reduced growth rates in seedlings of dandelion and curly dock.
Conclusions
Phragmites plants associate with endophytes to increase growth and disease resistance, and release bacteria into the soil to create an environment that is favorable to their seedlings and less favorable to competitor plants.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Disease protection and allelopathic interactions of seed-transmitted endophytic pseudomonads of invasive reed grass (Phragmites australis) |
| Series title | Plant and Soil |
| DOI | 10.1007/s11104-016-3169-6 |
| Volume | 422 |
| Issue | 1-2 |
| Year Published | 2018 |
| Language | English |
| Publisher | Springer |
| Contributing office(s) | Great Lakes Science Center |
| Description | 14 p. |
| First page | 195 |
| Last page | 208 |
| Google Analytic Metrics | Metrics page |