Plant Age-related Resistance to Ralstonia Solanacearum, the Causal Agent of Bacterial Wilt

It has been known for decades that many plants become more resistant, or less susceptible, to a variety of pathogens when they mature, a phenomenon called age-related resistance (ARR). Bacterial wilt is a very complex and serious vascular disease of many agronomically important crop species. The causing agent of bacterial wilt, Ralstonia solanacearum (Rs), is a devastating soil-borne bacterium with an unusually wide host range. To effectively integrate durable resistance to Rs into crops, information on mechanisms employed by plant defense would be highly desirable and necessary. However, extensive information on plant response to Rs at different developmental stages is still limited. In this study, we showed that Arabidopsis plants become more resistant to virulent Rs as they mature. In addition, our results revealed that the resistance of tomato to Rs is not established in germinating seeds. Furthermore, pretreatment of Arabidopsis seedlings with well-known defense-inducing compounds does not lead to an enhanced resistance to Rs. These data indicate that resistance to Rs, a vascular pathogen, in Arabidopsis and tomato plants is age-related, and that chemical-induced disease-resistance may not be primed in young seedlings.

並列關鍵字

Arabidopsis ； tomato ； Ralstonia solanacearum ； age ； resistance

被引用紀錄

Chen, Y. Y. (2008). 番茄對抗青枯病菌之分子機制研究 [master's thesis, National Taiwan University]. Airiti Library. https://doi.org/10.6342/NTU.2008.02149

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