Rhizobacterial exopolysaccharides elicit induced resistance on cucumber.
The role of exopolysaccharides (EPSs) from a plant growth-promoting rhizobacterium, Burkholderia gladioli IN26, on elicitation of induced systemic resistance was investigated. A purified EPS induced expression of PR- 1a::GUS on tobacco and elicited induced resistance against Colletotrichum orbiculare on cucumber. The maximum level of disease protection was noted when seeds were soaked in 200 ppm of the EPS. Our results indicate that EPS from specific rhizobacteria can elicit induced resistance and suggest that bacterial EPS might be a useful elicitor of resistance under field conditions.
Park
Kyungseok
K
Plant Pathology Division, National Institute of Agricultural Science and Technology, Suwon, Korea.
Kloepper
Joseph W
JW
Ryu
Choong-Min
CM
D042725:Burkholderia gladioli / Q000378:metabolism*; D020231:Colletotrichum / Q000472:pathogenicity*; D018553:Cucumis sativus / Q000187:drug effects* / Q000382:microbiology; D018506:Gene Expression Regulation, Plant; D010935:Plant Diseases / Q000382:microbiology*; D030821:Plants, Genetically Modified / Q000235:genetics / Q000378:metabolism; D011135:Polysaccharides, Bacterial / Q000302:isolation & purification / Q000494:pharmacology*; D012639:Seeds / Q000382:microbiology; D014026:Nicotiana / Q000235:genetics / Q000378:metabolism
D011135:Polysaccharides, Bacterial