Ralstonia solanacearum causes bacterial wilt in ginger. Here the role of signalling pathways such as salicylic acid (SA), ethylene (ET) and jasmonic acid (JA) was studied by comparing the differential expression of the marker genes for these pathways during bacterial wilt in both susceptible (ginger, Zingiber officinale) and resistant (mango ginger, Curcuma amada) ginger species. When expression of marker genes was compared among susceptible and resistant ginger sps., SA pathway marker genes, non-expressor of PR1 genes (NPR1) and TGACG sequence-specific binding protein (TGA6) and the ET pathway marker genes, AP2 domain class transcription factor (AP2) and 4-Coumarate: CoA ligase (4CL1), were expressed with a statistically different (p < 0.05) fold change among susceptible and resistant ginger sps in all time intervals. Expression of marker genes in resistant ginger showed higher expression in the first-hour post inoculation itself; however, marker genes of susceptible ginger had a slow pace in expression. Even though the marker genes of JA such as allene oxide cyclase (AOC) and lipoxygenase (LOX2) were activated in the initial hour post-inoculation in both ginger sps, their expression of these marker genes were significantly at par (p < 0.05) among ginger species in almost all time intervals. These results indicate that even though JA is activated upon infection, SA and ET signalling pathways play an essential role in giving resistance to resistant ginger. Moreover, the time and magnitude of expression play a higher impact on host-pathogen resistance. Understanding the role of signalling pathways involved in bacterial wilt resistance in resistant ginger can provide insights into host-pathogen resistance in ginger, which can help develop wilt-resistant ginger.

青枯雷尔氏菌会引起姜中的细菌枯萎。在这里，通过比较两种易感病菌（姜，姜）中青枯病期间这些途径的标记基因的差异表达，研究了水杨酸（SA），乙烯（ET）和茉莉酸（JA）等信号传导途径的作用。和抗性（芒果姜，姜黄amada）姜种。比较易感和抗病姜的标记基因的表达时，SA途径标记基因，PR1基因的非表达子（NPR1）和TGAGG序列特异性结合蛋白（TGA6）以及ET途径标记基因，AP2域类转录因子（AP2）和4-香豆酸酯：CoA连接酶（4CL1）在所有时间间隔内的易感性和抗性姜芽之间均具有统计学上不同的（p <0.05）倍数变化。在抗性生姜中，标记基因的表达在接种后的第一小时内表现出较高的表达。然而，易感生姜的标记基因表达缓慢。尽管在两个生姜中，JA的标记基因（如氧化烯环化酶（AOC）和脂氧化酶（LOX2））在接种后的最初一小时都被激活，在几乎所有时间间隔内，这些标记基因在生姜物种中的表达均显着处于标准水平（p <0.05）。这些结果表明，即使JA在感染后被激活，SA和ET信号通路在赋予抗性生姜抗性中也起着重要作用。而且，表达的时间和幅度对宿主-病原体抗性具有更高的影响。了解抗性姜中细菌性青枯病抗性相关的信号传导通路的作用，可以提供对姜中宿主-病原体抗性的见解，从而有助于开发抗性青枯病姜。SA和ET信号通路在产生抗性生姜的抗性中起重要作用。而且，表达的时间和幅度对宿主-病原体抗性具有更高的影响。了解抗性姜中细菌青枯病抗性相关的信号传导通路的作用可以提供对姜中宿主-病原体抗性的见解，从而有助于开发抗青枯性姜。SA和ET信号通路在产生抗性生姜的抗性中起重要作用。而且，表达的时间和幅度对宿主-病原体抗性具有更高的影响。了解抗性姜中细菌性青枯病抗性相关的信号传导通路的作用，可以提供对姜中宿主-病原体抗性的见解，从而有助于开发抗性青枯病姜。