Comparison between Solanum torvum Sw. and S. melongena L. after Ralstonia solanacearum inoculation.
Bacterial wilt, caused by Ralstonia solanacearum, is one of the most devastating plant diseases, affecting some economically important Solanaceae crops. In contrast, Solanum torvum, also known as wild eggplant, does not wilt when infested with R. solanacearum. In order to describe the mechanism underlying the response of S. torvum, it was compared with the cultivated eggplant, S. melongena, when both were infected with the same R. solanacearum strain. No wilting occurred in S. torvum, although the bacteria colonised roots and stems in both species within the first 24 h. There were marked differences beyond 24 h, consisting of high bacterial mortality in S. torvum. Using the calli model, our investigations revealed an increase in cell wall monoamine oxidase activity in S. torvum after R. solanacearum inoculation, which did not occur in S. melongena.
Université de la Réunion, UMR C53 Peuplements Végétaux et Bioagresseurs en Milieu Tropical, Pôle de Protection des Plantes, Saint Pierre, France.
M
M
Aribaud
M
M
Noirot
I
I
Fock-Bastide
S
S
Vaniet
H
H
Kodja
D002473:Cell Wall / Q000378:metabolism; D060467:Disease Resistance; D054884:Host-Pathogen Interactions; D008995:Monoamine Oxidase / Q000378:metabolism; D010935:Plant Diseases / Q000382:microbiology*; D043368:Ralstonia solanacearum / Q000254:growth & development / Q000502:physiology*; D032322:Solanum / Q000378:metabolism / Q000382:microbiology*; D013045:Species Specificity
D008995:Monoamine Oxidase
Bacteria density; Solanaceae; bacterial wilt; eggplant; monoamine oxidase