Functionality of resistance gene Hero, which controls plant root-infecting potato cyst nematodes, in leaves of tomato

被引:10
作者
Cabrera Poch, H. L. [1 ]
Manzanilla Lopez, R. H. [1 ]
Kanyuka, K. [1 ]
机构
[1] Rothamsted Res, Plant Pathogen Interact Div, Harpenden AL5 2JQ, Herts, England
关键词
gene-for-gene hypothesis; hypersensitive response; plant-nematode interactions; tissue specificity;
D O I
10.1111/j.1365-3040.2006.01517.x
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
The expression of host genomes is modified locally by root endoparasitic nematode secretions to induce the development of complex cellular structures referred as feeding sites. In compatible interactions, the feeding sites provide the environment and nutrients for the completion of the nematode's life cycle, whereas in an incompatible (resistant) interaction, the host immune system triggers a plant cell death programme, often in the form of a hypersensitive reaction, which restricts nematode reproduction. These processes have been studied in great detail in organ tissues normally infected by these nematodes: the roots. Here we show that host leaves can support a similar set of programmed developmental events in the potato cyst nematode Globodera rostochiensis life cycle that are typical of the root-invading nematodes. We also show that a gene-for-gene type specific disease resistance that is effective against potato cyst nematodes (PCN) in roots also operates in leaves: the expression of the resistance (R) gene Hero and members of its gene family in leaves correlates with the elicitation of a hypersensitive response only during the incompatible interaction. These findings, and the ability to isolate RNA from relevant parasitic stages of the nematode, may have significant implications for the identification of nematode factors involved in incompatible interactions.
引用
收藏
页码:1372 / 1378
页数:7
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