Plant-mediated restriction of Salmonella enterica on tomato and spinach leaves colonized with Pseudomonas plant growth-promoting rhizobacteria
- Resource Type
- Authors
- Shirley A. Micallef; Chiun-Kang Hsu
- Source
- International Journal of Food Microbiology. 259:1-6
- Subject
- Chlorophyll
Crops, Agricultural
0106 biological sciences
0301 basic medicine
Food Contamination
Biology
Rhizobacteria
Plant Roots
01 natural sciences
Microbiology
03 medical and health sciences
Solanum lycopersicum
Spinacia oleracea
Pseudomonas
Humans
Cultivar
Inoculation
fungi
Salmonella enterica
food and beverages
General Medicine
Lettuce
biology.organism_classification
Plant Leaves
Horticulture
030104 developmental biology
Agronomy
Seedlings
Seedling
Salmonella Infections
Spinach
Phyllosphere
010606 plant biology & botany
Food Science
- Language
- ISSN
- 0168-1605
Reducing Salmonella enterica association with plants during crop production could reduce risks of fresh produce-borne salmonellosis. Plant growth-promoting rhizobacteria (PGPR) colonizing plant roots are capable of promoting plant growth and boosting resistance to disease, but the effects of PGPR on human pathogen-plant associations are not known. Two root-colonizing Pseudomonas strains S2 and S4 were investigated in spinach, lettuce and tomato for their plant growth-promoting properties and their influence on leaf populations of S. enterica serovar Newport. Plant roots were inoculated with Pseudomonas in the seedling stage. At four (tomato) and six (spinach and lettuce) weeks post-germination, plant growth promotion was assessed by shoot dry weight (SDW) and leaf chlorophyll content measurements. Leaf populations of S. Newport were measured after 24h of leaf inoculation with this pathogen by direct plate counts on Tryptic Soy Agar. Root inoculation of spinach cv. 'Tyee', with Pseudomonas strain S2 or S4 resulted in a 69% and 63% increase in SDW compared to non-inoculated controls (p