Epiphytic Strains of Pseudomonas syringae Kill Diverse Aphid Species
| Autor: | Tory A. Hendry, Melanie R. Smee, Imperio Real-Ramirez, Catalina Zuluaga Arias |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Population Longevity Biological pest control Zoology Pseudomonas syringae 010603 evolutionary biology 01 natural sciences Applied Microbiology and Biotechnology 03 medical and health sciences Species Specificity Rhopalosiphum padi Invertebrate Microbiology Animals education Symbiosis 030304 developmental biology 0303 health sciences education.field_of_study Aphid Ecology biology fungi food and beverages biochemical phenomena metabolism and nutrition biology.organism_classification Acyrthosiphon pisum Aphids Epiphytic bacteria Phyllosphere Food Science Biotechnology |
| Zdroj: | Appl Environ Microbiol |
| Popis: | Interactions between epiphytic bacteria and herbivorous insects are ubiquitous on plants, but little is known about their ecological implications. Aphids are devastating crop pests worldwide, so understanding how epiphytic bacteria impact aphid populations is critically important. Recent evidence demonstrates that plant-associated bacteria, such as Pseudomonas syringae, can be highly virulent to one species of aphid, the pea aphid (Acyrthosiphon pisum). Currently, we have no knowledge on how broad this phenomenon is across diverse aphid species that are of high agricultural concern. In controlled experiments using oral exposure in an artificial diet, we challenged five aphid species of agricultural importance with three strains of P. syringae that vary in virulence to the pea aphid. These strains also vary in epiphytic ability and comprise two phytopathogens and one non-plant-pathogenic strain. In general, differences in virulence to aphids remained relatively constant across strains regardless of the aphid species, except for the bird cherry-oat aphid (Rhopalosiphum padi), which is significantly less susceptible to two P. syringae strains. We demonstrate that lower infection incidence likely plays a role in the reduced susceptibility. Importantly, these data support previous results showing that interactions with epiphytic bacteria are important for aphids and may play a large, but underappreciated, role in insect population dynamics. Our study illustrates a potential role of epiphytic bacteria in the biological control of aphid pests broadly but suggests the need for more research encompassing a greater diversity of pest species. IMPORTANCE Sap-sucking aphids are insects of huge agricultural concern, not only because of direct damage caused by feeding but also because of their ability to transmit various plant pathogens. Some bacteria that grow on leaf surfaces, such as Pseudomonas syringae, can infect and kill aphids, making them potentially useful in the biological control of pest aphids. However, only one aphid species, the pea aphid (Acyrthosiphon pisum), has been tested for infection by P. syringae. Here, we challenged five aphid species of agricultural importance with three strains of P. syringae that vary in virulence to the pea aphid. We found that four of these aphid species were susceptible to infection and death, suggesting that these bacteria are broadly useful for biological control. However, one aphid species was much more resistant to infection, indicating that more testing on diverse aphid species is needed. |
| Databáze: | OpenAIRE |
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